2. anaerobic treatment of septage & biosolids june 15, 2006

8/11/2019 2. Anaerobic Treatment of Septage & Biosolids June 15, 2006

1/38

ri

ng

PADDON

Consultant

t;

,\


2/38

-,

Anaerobic

Treatment

of

Septage/Biosolids

To

Produce

Biogas,

Electrical

Power and

Treated

Biosolids

Township

of Chatsworth

Township

of

Georgian

Bluffs

Projeot

No.: L03012

Date:

June

15,

2006

Prepared

by:

Henderson

Paddon

&

Associates

Limited

Givil

&

Environmental

Engineering

Consultants

Owen

Sound

Professional

Gentre

945-3rd

Avenue

East,

Suite 212

Owen

Sound, Ontario,

N4K 2KB

Tel: 519-376-7612

Fax: 519-376-8008

Email:

hpa@hp*on.ca

Website:

www.hp.on.ca

Owen

Sound

i Townofhe

Blue

Mountains

* Grimsby

*

Hanover

Copyright@

Henderson Paddon

& Associates

Limited

Thls

document

may

not

be

roproduced

ln whole

or in

part

wlthout

the

prior

written

consent

of

Henderson Paddon

&

Associates Limited.


3/38

Anaerobic

Treatment

of Septage/Biosolids

To

Produce

Biogas,

Electrical

Power

and

Treated

Biosolids

Township

of

Chatsworth/Township

of Georqian

Bluffs

TABLE OF CONTENTS

ACKNOWLEDGEMENT

1.0

TNTRODUCTION.

,.

....

1-1

2,0

ESTIMATED

QUANTITY

AND

QUALITY

OF SEPTAGE

AND

HAULED

.

. ,

.

. 2-1

SEWAGE

,. . ,,.2-1

2.1

Number

and Type

of

Septic

System . .

.

.

2-1

2.2 QuantityofSeptage

....2-1

2.3 QualityofSeptage

.....2-1

2.4

Estimated

Quantity

and

Organic Loading

of

Septage

and

Hauled

Sewage

.

. .

.

2-2

3.0

ANAEROBICDIGESTIONOFORGANICMATTER....

.......3-1

3.1

AnaerobicDigestionof OrganicMatter

....,,,3-1

3.2

Using

BiogasfromAnaerobicDigesterstoGenerateElectrical

Power

.......3-1

3.3

Treated

Waste

(Bosolids)

Produced

from

Anaerobic

Digestion

of

Septage

.

.

.

3-2

4.0 PROPOSED

SEPTAGE/BIOSOLIDS TREATMENT AND ELECTRICAL

POWER PRODUCTION

FAC|L|TY

.....,.4-1

4.1

DescriptionofTreatmentSystem

......4-1

4.2

TrealrnentFacilitylayoutand

SitePlan..

.....4-3

4.3

EstimatedProjectCost.

.......4-3

.

4.4

Estimated

Operational Costs

.

.

. 4-4

5.0

FINANCIALANALYSIS

........5-1

6.0

RECOMMENDATIONS

...

.

, .

.,

6-1

SELECTED

REFERENCES

LIST OF APPENDICES

Appendix

A

US

EPA

Septage Design Guidelines

Appendix

B Guideline for

the

Design

of

Sewage

Treatment

Works,

"Anaerobic

Digestion

of

Biosolids",

Ministryof the Environment,

July

1984

Appendix

C

Typical

Anaerobic Digestion

of Cattle Manure

System

to

Produce Biogas

and Electrical

Power

Table 1

Table

2

Table 3

Table

4

Table

5

Table

6

LIST

OF TABLES

Estimated

Quantity

of Hauled Sewage and Septage

-

2004

Estimated

Quantity

of

BOD.

and

TKN

Loadings

-

2004

Biogas and Electrical Power Provided from Anaerobic Digestion


and

Corn Stalks

Project

Cost Estimate

-

Septage/Biosolids Treatment System

to Produce Electrical

Power

and Treated Biosolids

Annual

Project Operational

Cost Estimate

(2006)

Financial

Analysis

of

Treatment


to

Produce

Electrical

Power and

Treated Biosolids

Project #103012

Heloensor PADDoN

June

2006


4/38

Anaerobic

Treatment

of

Septage/Bosolids

To

produce

Biogas,

Electrical

Power

and

Treated

Biosolids

Township

of Chatsworth/Township

of Georgian

Bluffs

LIST

OF FIGURES

figure

1

Location

Map, Grey

and

Bruce

Counties,

Townships

of

Chatsworth

and

Georgian

Bluffs

Figure

2

Anaerobic

Digestion

of

Septage/Biosolids to

Produte eiogas,

lctrat

poweiano

Treaieo

Biosolids

ligure 9 Itoposed

Qeptage

Treatment

and Electrical

Power

Generation

System

Figure

4

Proposed

Site Plan

for

Anaerobic

Treatment

of

Septage/Biosoids

nd

Electricalpower

Generation

Project

#103012

HEoeRsot

Poooru

June

2006


5/38

Anaerobio

Treatment


To

Produce

Biogas,

Electrical Power and Treated

Blosolids

loyghip

of CiaLsr

@rthffownship

of

Georsian

BluftE

AGKNOWLEDGEMENT

I would tiketo acknowledge

Mr.

Martin Lensink,

P.Ertg., of

CM Engineering,

St. Catharines, Ontario, for

his

assistance

regarding

anaerobic digestlon

of agricultural

manure

products

to

produce

biogas

and electrioal

power,

in

the

preparation

of this report.

Project

#103012: Henoensou

PADDoN

June

2006


6/38

Anaerobic

reatment

of

Septage/Biosolids

To Produce

Biogas,

Electrical Power

and

Treated

Biosolids

1-1

of

Chatsworth/Townshio

of

ian Bluffs

1.0

INTRODUCTION

The Township

of

Chatsworth

does

not have

a

sewage treatment

plant

or

an

existing

facility

for

treating

septage from

the

septic

tanks

within the

Township

of

Chatsworth. The

Township

of

Georgian

Bluffs

presenly

has

the

Derby

wastewater

treatment

plant

which

essentially

treats septage

and hauled

sewage

but is

not

adequate

to treat all

the septage

within

the Municipality

of the Township

of Georgian Bluffs.

The

Ministry

of

the

Environment,

several

years

ago,

indicated that

the

disposal

of untreated

septage

on

agricultural

land

will

be

discontinued

and

that

all

septage

will need

to

be

treated

before

being

disposed

of on

agricultural

land. The

Townships

of Chatsworth

and Georgian

Bluffs

are

interested

in

being

proactive

with

regard

to

treatrnent

of

septage and have therefore

engaged

Henderson

Paddon

&

Associates

Limited

to

further

investigate

a

proven

agricultural

manure

anaerobic

digestion

system

which

could

be applied

to treat septage

and biosolids

within

the

above

mentioned

municipalities.

The Township

of

Chatsworth

and

the Township

of

Georgian

Bluffs

are

located in

the

County

of

Grey

as

shown

on

Figure

1.

The

treatment

of agricultural

manure

using

anaerobic

digestion

to

produce

biogas has

been carried

out in

Europe for several

years.

At

present,

there

are

more

than

3,000

anaerobic

digester

systems

in

Europe

that

produce

biogas,

from

agricultural

waste

products

such

as manure,

which operate

a

generator

to

produce

electric

power.

The

systems

have

been

tested

and

proven

in

Europe for

the treatment

of agricultural

manure.

ln

some

countries in

Europe

there has

been

treatment

of human waste

in these

types

of

anaerobic

digestion

systems

for

eventual

disposal

on agricultural

land.

ln

Ontario,

only

one

(1)

anaerobic digestion facility

to

produce

biogas

and

electricity

from

agricultural

manure has

been constructed,

and

that

is

near

Cobden,

Ontario.

lt

is

my understanding

from

Mr. Martin

Lensink,

P.Eng., of

CEM Engineering

in St.

Catharines,

that

two

(2)

additional systems

for

anaerobic

treatment of

agricultural

manure to

produce

biogas

and electricity are

to

be

constructed

in

Ontario

in

the summer

of

2006.

A

Septage Management Plan

for

Member

Municipalities

of

Grey Countywas

prepared

by

Henderson

Paddon

& Associates

Limited

in

a

reported

dated March

2004. This was

funded

50%

by the

Ministry

of

the

Environment

and

determined the

quality

and

quantity

of

septage, estimated

costs

and

treatment

technologies

for

each

of

the Member Municipalities

in

Grey

County including

the

Township

of

Chatsworth

and the

Township

of Georgian

Bluffs.

Project

#103012

HENDERSoN

PADDoN

June 2006


7/38

Anaerobic

Treatment

of

Septage/Biosolids

To

produce

Biogas,

Electrical

Power

and Treated

Biosolids

2.1

totalsolids

totalvolatile

solids

totalsuspended

solids

2-1

2.0

ESTIMATED

QUANTITYAND

QUALITY

OF

SEPTAGEAND

HAULED

SEWAGE

Number and

Type

of

Septic System

The

number

and

type

of

septic

systems

in

the

Year

2o04

for

the Township

of Georgian

Bluffs

and

the

Township

of

Chatsworth

are

outlined

on

Table

1.

lt

is

estimated

that

there

are 4,540

septic

systemsiholdings

tanks

in

the Township

of

Georgian

Bluffs

and

2,792

septic

systems/holdings

tanks in

the

Township

of

Chatsworth

for a

total

or 7

332'

Generally,

more

than

g97o

of the

septic

systems

and

holding

tanks

are

septic

systems.

2,2

Quantitv

of

Seotaoe

The

quantity

of

septage

was

estimated

for

the

Township

of Chatsworth

and

the

Township

of

Georgian

Bluffs

in

the septage

Management

Plan

for

Member

Municipalities

of

Grey

county.

lt

was

recommended

in

the

septage

Management Plan

thatthefrequencyof

septic

pump-outforresidentialseptic

systemswould

be

once

every

three

(3) years,

once

every

five

(5)

years

for

recreational

homes,

once

every

three

(3) years

for

farms,

and

every

year

for

multi-residential

systems.

Based

on

this

criteria,

the

estimated

quantity

of septage

for

the

Township

of

Georgian

Bluffs

and the

Township

of

Ghatsworth

are

shown on

Table

1.

lt is

estimated

that

the

total

septage

and hauled

sewage

per

year

would

be

10,220

m3/year

in 2004,

based

on

the criteria

that

was

used

in

the

Septage

Management

Plan

for

Member

Municipalities

of

Grey

County.

This

translates

into

a

totalseptage

and hauled

sewage,

over

a nine

(g)

month

period,

of

37.3 m3/day.

2.3

Quality

of

Septaoe

Actual

laboratory

measurements

of

septage

quality

were

summarized

in

the

septage

Management

plan

for

Member

Municipalities

of Grey

County.

The

septage

quality

from

the

above

mentioned

report

was

reviewed

along with

desgn

values

suggested

by

the

us EPA

as shown

in Appendix

A,

The

suggested

raw

septage design values are:

40,000

mg/L

25,000

mg/L

15,000

mg/L

Project

#103012

HENDERSoN

Pooo,

June

2006


8/38

s

t

I

'

:"*'

e

'GW

n

tu

,w

W,.V\

GE*RGIANBAY

I

MMr,4

*-ffi

LEGENO

C@Nry/Eru

-aN

-@-

PmNcqLffi

Y

-

MWEPISONOY

II-I

CONWNOAY

FMERlWW

-------

8uo

KINCARDNE

FonilrRrons),iP

LOCATION

MAP

GREY

AND

BRUCE

COUNTIES

TOWNSHIPS

OF

CHATSWORTH

AND

GEORGIAN

BLUFFS

DESIGN

M

UKAWN

D

irrPKovLu

M

JUNE

2

HENDERSON,

PADDON

&

ASSOCIATES

LIMITED

CONSULTING

ENGINEERS

OlryEN

SOUND

O

THT BLUE IIIOUNTAINS

.

COLUNC\ryOOD

.

HANOVTR

PHoNE

(s19)

J76-7612 stNcE

1972

uALt'

1:75o,

103

1

copyRrcHT

@

HENDERSoN

pADDoN

AND

AssoctATES

LtMtrED


9/38

Anaerobic Treatment of

Septage/Biosolids

To

Produce

Biogas,

Electrical Power

and Treated

Biosolids

BODs

TKN

total

phosphorus

7,000

mg/L

700

mg/L

250

mg/L

2.4

Estimated

Quantity

and

orqanic

Loadinq

of

septaqe

and

Hauled sewaoe

The

estimated

quantity

of hauled

sewage

and

septage

from

the

7,332

septic

systems

and

holding

tanks

is

estimated

to be 37.3

m3/day

over

a

nine

(9)

month

period

from

March

1 to

November

30,

The

total septage

in

that

period

would

be

10,220

m3lyear.

Utilizing

a BOD'

concentration

from

the

US.EPA Design

Guidelines

of 7,000

mg/1,

a

TKN

concentration

of

700

mg/L

and a

suspended

solids concentration

of

15,000 mg/L,

the

calculated

loadings/day for

the nine

(9)

month

period

from

March

1

to November

30

each

year

is

given

for

BOD',

TKN, and suspended

solids

in

Table

2.

The

BODo loading

per

day is 261.1

kg/day

from

the Township

of Georgian

Bluffs

and

the Township

of

Chatsworth.

The

TKN loading

would

be

26.1

kg/day and

the

suspended

solids loading

would

be SSg.S

kg/day,

Project

#103012

HeroensoN

PADDoN

June

2006


10/38

Estimated

Quantity

an

Septage

of

Municipality

No.

of

Septic

Systems and

Holding Tanks

Quantity

of

Septage/Hauled

Sewage

(9

mo.

Period)

m3/day

BOD5

Concentration

mo/Litre

1 Iwo. Of

Georoian Bluffs 4540

22.7

7000

2

Twp.

Of

Chatsworth

2792

14.6 7000

TOTAL

7,332 37.3

Chatsworth


11/38

IL2

'D5

rd

TKN

Loadings

-

2004

{auled

Sewage

'rhe

lTownshi

an

Bluffs

TKN

lcentration

Suspended

Solids

Goncentration

BOD5

Loading

TKN

Loading

Suspended

Solids

Loading

G:\2003\100\103012\Reports\Table

2.x


12/38

SUBSTRATE

PUMP

WASTE

HEA

PROCESS

SCHEMATIC

NOTE:

SCHEMATICTAKEN

FROM

CEM ENctNEERtNc

FLOWCHART

NAEROBIC

DIGESTION

OF

SEPTAGE/BIOSOLIDS

TO PRODUCE

BIOGAS,

ELECTRICAL

POWER

AND

TREATED BIOSOLIDS

HENDERSON

PADDON

&ASSOCIATES

LIMITED

CML

&

EI.IVIRONMENTAL

ENGINEERING

CONSULTANTS

UlEt{

SAA

.Tl

3L{,8 ilfXfiftl{S.

t{s8Y. lvrR

lG

(5te)

rn-rz

s

lrrz

PADON

& ASSOCIA'IES UMTED


13/38

Anaerobic

Treatment

of

Septage/Biosolids

To

Produce

Biogas,

Electrical

Power

and

Treated

Biosolids

Township of

Chatsworth/Township

of

Georqian

Bluffs

3-1

3.0

3.1

ANAEROBIC

DIGESTION OF ORGANC

MATTER

Anaerobic

Diqestion

of

Orqanic Matter

Anaerobic

digestion

of

organic

matter has

been

carried out for many decades,

lt has

been used both

to

treat

anirnal

and

human

waste. Biosolids

from

wastewater

treatment

plants

in Onlario

have been

anaerobically

digested

as

a

method of treatment

for

many

years.

The anaerobically

treated biosolids

frorn a municipal

wastewater

treatment

plant

have

generally

been

disposed on agricultural

land.

However,

in

some

cases,

they

have been

dewatered

and

placed

in

landfills

or

incinerated.

It has

been

shown that

anaerobic

digestion of agriculture

manure

as described

in

this

report,

generally

produced

99.5%

pathogen

kill

in

the treatment

process,

The treatment

process

provides

for

two

(2)

anaerobic

digesters

(primary

and secondary).

Waste is

placed

in

the

prirnary

digester

for

a minimum of

thirty five

(35)

days

and

then

transferred

to the

secondarydigesterfor

another mnimum

of

thirtyfive

(35)days,

The Ministry

of

the

Environment

criteria for treating

of

biosolids

is a minimum

of

fifteen

(15)

days

in

the

primary

digester

andarecommendedsecondarydigesteroftwo(2)tofour(4)tirnesthevolume

orfromthirty(30)tosixty(60)

days,

in

part,

to

provide

storage.

A copy

of

the

appropriate

Ministry

of

the

Enviroriment

guidelines

for

anaerobic

digestion

of

biosolids can

be

found

in

Appendix

B.

3.2

Usinq

Bioqas from

Anaerobic Diqesters

to

Generate Electrical

Power

Anaerobic

digestion of

organic

waste

produces

biogas. Biogas is

approximately

65%

methane and 35%

carbon dioxide.

An engine

and

generator

can be

operated

to

produce

electrical

power

using

biogas.

The

general

process

schematic

of how organic matter,

(septage/biosolids)

is

treated

to

produce

biogas and

thus

generate

electricity

is

shown

on

Figure

2.

Organic matter such as septage/biosolids

and

corn stalks,

when

required,

would

be fed into the

anaerobic digesters to

produce

biogas.

The

biogas

is

stored

in

the flexible

roof

of

the

primary

and secondary

digesters as shown on

the

process

schematic. This

biogas

is

then

utilized

to

run

an

engine,

which operates

a

generator

to

produce

electrical

power

that can

be

fed

into

the

Hydro

One

grid.

Under the new Hydro One

rules

from

the Province

of

Ontario for this type of

power

generation

system,

Hydro

One

willpay

$0.1

1/kilowatt

hour.

The system

will

produce,

in

addition

to

biogas, treated

liquid

digestate,

since

967o

of

the septage would

be

liquid.

However,

this

process

will

have

a

99.57o kill of

pathogens,

also

produce

a

material

that

is

essentially

odourless

and will

have

the

retained nutrients

that would

be

beneficialfor disposal

on

agricultural

land.

Approximately

2%

of

the

treated septage will

be

solids depending

on

the

amount

of

corn

stalks

required

in

the

process.

Storage

will

be

required

for the

liquid

digestate

(approximately

96% of the

Project #103012

HenoeRsor Pnoool.t

June 2006


14/38

SILENCER/

[I

'*"-

I I /

DrcEsrR

FUEL

cAs (DFc)

ll

/

,_--

ll

.EPTAGE

ll r#

l#j

DUMPNG

STATON

I;JIII ffi

l#'J

l*fil

ffiDGE''ER

l*il

tl

l

ffi

ffi

.o,_.="r,oil

suppLy/

INLET

l,jl

lffi

IT

\ /_

GAS

STORAGE

FULL

\.--

STORAGE

\

-\GAs

sroRAGE

EMPTY

--

,a \

@,,

-----:l#\

___=

_

_____-____{

t*l*r,l;l \

DGESTER

ilffiffi

" l I

I

':'l':l

ilit

jl:ti'.ii;,.;iCf

'r;:'l;"1+

r"

-

"

--'-

"

I

NOTE:

SCHEMATICTAKN

FROM

CEM

ENGINEERING

FLOWOHART

PROPOSED

SEPTAGE

TREATMENT

AND

ELECTRICAL

POWER

GENERATION

SYSTEM -

TOWNSHIPS

OF

CHATSWORTH

AND

GEORGIAN

BLUFFS

DESI6N

G

Arrruvu

JUN

HENDERSON

PADDON

&ASSOCIATES

LIMITED

CIVIL

& ENVIRONMENTAL

ENGINEERING

CONSULTANTS

]VEN SI]UI}

.THE

BLUT

II]UNTAIT{S

r

GRiIISBY.

TI'{I]VER

$E

(5r9)

3/0-7612

src

ltr

1

3

@

HrNornsoru

pADoN

& Assoct,A.rEs

uMmD


15/38

Anaerobic Treatment


To Produce

Z-2

Biogas, Electrical Power and

Treated

Biosolids

Township

of

Chatsworth/Township

of

Georgian

Bluffs

original

quality

of

septage).

lt is

recommended

that

thirty

(30)

days

or

approximately 1

,1

55

m3

of

storage

be

provided.

The

proposed

septage

treatment

and

electrical

power

generation

system is outlined more

specifically,

including the septage dumping

station on

Figure

3, A

typical anaerobic

digestion of

cattle

manure

system

to

produce

biogas

and

electrical

power

is

shown in

Appendix

G.

3.3 Treated

waste

(Biosolids)

Produced

from

Anaerobic

Diqestion

of septaqe

The treated

waste

from

the

anaerobic

digestion

of

septage will be

stored in a

concrete

tank with a

thirty

(30)

day capacity

(1,155

m3),

ready

for

disposal

on

agricultural

land.

Approximately

96% of the treated

biosolids

will be

in

a

liquid form.

The

treated biosolids

digestate

will have

99.5olo

inactivation of

pathogens,

essentially

odourless

and will

have

the

retained

nutrients

beneficial

to

agricultural

land.

This

liquid

will need to be

spread

onto agricultural

land

for dsposal

during

suitable

periods

from April

1

to

November 30 each

year.

Project

#103012

HeloeRsol.l PADDoN June

2006


16/38

TABLE

3

Biogas

and

Electrical

Power

provided

from

Anaerobic

Digestion

of

Septage/Biosolids

and Gorn

Stalks

1.

Amount

of septage/year:

=

j0,ZZ0

m3ar

2.

septage

to

digester

per

day

from

March

1

to November

30:

=

37.3

m3/day

(37.3

tonnes/day)

3.

onnes of co-rn

stalks to

digester

per

day

from March

1

to

=

1.1

tonnesiday

November

30:

4,

Tonnes of corn

stalks

to

digester

per

day

from

December

1

to

=

2.0

tonnes/day

February

28:

5.

Biogas

produced

from:

-

1

tonne of

septage

=

13.1

m3

-

1

tonne

of corn

stalks

=

SS7

m3

6.

Biogas

produced

per

day

-

March

1

to November

30:

Septage

37.3

x

13.1

=

488.6 m3/day

Corn

Stalks

1.1

x

557

=

612.7

m3ldav

otal Biogas/day

1,101

m3/day

7.

0.45

m3 of

biogas is

required

to

produce

1

kilowatt

hour

B.

Power

produced

per day

from March

I

to

November

30:

91

=

2,446

hlh

*

2,400

tvvh

=

100

kw

0.45

9.

Biogas

produced

per

day

for

December

1

to February

29

from

corn

stalks:

2.0 x

557

=

1,114

m3/day

10.

Power

produced

per

day

from December

1

to

February

28:

1,1'14

=

2,476

lcwh

o

2,400

twh

,1oo

kw

0,45

11.

Revenue

from electricity

produced

per

year:

2,400

kwh/day

x

$0.11lkwh

x

365

=

$96,360

say

$96,400

G:\2003\100\103012\Reports\Table

3.wpd


17/38

Anaerobic Treatment of

Septage/Biosolids

To

Produce

Biogas, Electrical Power

and

Treated Biosolids

Torryqhip

qf

ChatsworthlTq{DqhtB

of

Georgian

Bluffs

4-1

4.0

4.1

PROPOSED

SEPTAGE/BIOSOLIDS

TREATMENT

AND ELECTRICAL POWER

PRODUCTION

FACILITY

Description

of

Treatment

System

It is

proposed

to

treat

septage/biosolids from

a

period

of

March

1

to November

30 and utilize a 100

kw

biogas

generator

to

generate

electricity.

This

electrical

power

will

be fed into

the

Hydro

One

grid

with

a

proper

transfer

switch

into

a

single

phase power

line.

lt

has

been

calculated

that

13,I m3 of

biogas can

be

produced

per

tonne

or

cubic

metre of

septage, At

a

rate of

37.3 m3 of

septage

per

day, the amount

of biogas

produced

from septage

would be

488.6 m3/day.

0.45

m3

of

biogas is required

to

produce

1

kwh of

electricity. Therefore,

488.6 m3 of biogas

would

produce

1,086 kw

hours

of

power per

day. 2,400

kw

hours

per

day

are

required

to

fully

utilize

the

100 kw

generator.

The

additional

biogas

required

is

to

be

made

up

from

corn stalks, which

have a high

production

of

biogas

per

tonne

of

substrate. The

biogas

production

in

cubic

metres

per

tonne

of

substrate

from corn

stalks

(maize

stalks),

is

557

m3/tonne,

whereas for sewage sludge

it

is

15

m3/tonne

and

13.1 m3/tonne

(calculated)

for

septage. Therefore,

it

is

proposed

to add 1 .1 tonnes of corn

stalks

per

dayfrorn

March 1 to

November

30

into

the

digesters

in

order

to

produce

a

total

of 2,400

kwhiday,

It

is

proposed

to

keep

the

anaerobic

digestion

process

operating

through the

winter

from December

1 to

February 28,

(since

it is a

sensitive

process)

in

order to

properly

operate

this

treatrnent system.

lt is

proposed

to

feed

approximately

2

tonnes

of

corn stalks

per

day during

this

period

into the digester

in

order

to

produce

2,400

kw hours

of

power

per

day

or

the equivalent

of the

total

capacity

of

the

100 kw

generator.

The

process

for

the

proposed

septage/biosolids

treatment

system is

shown

on

Figures

2

and 3. The

general

layout and

proposed

location

of the

septage/biosolids

treatment system

at the

Derby

wastewater

treatment

plant

site

in

the

Township

of Georgian

Bluffs

is

shown on

Figure

4.

The

location of

the

septage

treatment

system in Grey

County

is shown on Figure

L

The

electrical

power produced

from

anaerobic

digestion

of

septage/biosolids

and

corn

stalks,

is shown

on

Table

3.

The estimated

revenue

from electrical

power

is

$96,400/year,

Project #103012

HeloeRsoN

Pnooott

June 2006


18/38

1.

2.

12.

13.

Anaerobic

Treatment

of

Septage/Biosolids

To

produce

Biogas,

Electrical

Power

and

Treated

Biosolids

The

treatment

system

will

generally

consist

of the following:

Primary

diqester

(with

gas

storage

in

the roof), 35

days

of

storage

with

an

approximate

capacity

of

1,500

m3.

Secondary

diqester (with gas

storage

in the

roof),

35 days

storage

with

an

approximate

capacity

of

1,500

m3.

Heatino

svstem

to

accelerate

process.

Mixing

system

in

each

of the

digesters.

Substrate

feeder

to feed

corn stalks.

500

m3 concrete

bunker

silo

storage (for

corn

stalks).

Digestate

storage

(treated

liquid

storage),

30

days

storage

(1,155

m3)

reinforced

concrete

facility.

Septage/biosolids

receiving

station.

Biogas

enqine

Electrical

qenerator

set.

Site development

including

roads

and

landscaping.

connection

of

the

electrical

power

produced

with

the

Hydro

one

grid

system.

Power

line from

treatment

works

to

hydro

grid.

It is

also estimated

that

there

is

a

requirement

for soils

investigation

and

materials

testing

during

construction

and

commissoning

of

the treatment

system.

ln

addition,

a

Class

EnvironmentalAssessment

will

likely

be

required

to

be carried

out

since

this

is

a

municipal

project.

4.

5.

6.

7,

9.

10.

11.

Project

#'103012

HENDERSoN PADDoN

June

2006


19/38

*L

I

5i0ri

\\

t*\l

N

--/

/f],"

tt

SOUTH HALF LOT

4,

CONCESSION

VI

(FORMER

TOWNSHTP

OF

DERBY)

TOWNSHIP

OF

GEORGIAN

BLUFFS

EXISTING

DERBY

WASTEWATER

TREATMENT

PLANT SITE

CoPYRTGHT

@

neruoensoru

pAoooN

&

AsSoCtATES

LtMtrEo


20/38

*'-'',,

'----:li\\

|

)

\-

it=i)+\

i(

$

-----

-'];.-"'"'-

)

"?':;;'

.-.'

r-S\

.,._..r=r\=_

,_,

JE

,

dr.'ei

:T9

//7

/''.F,

l/,t./ /

e

s

'/

/-"/

J

I

-.-----


21/38

L

TABLE

4

Project

Cost

Estimate

Septage/Biosolids

Treatment

System

to

Produce

Electrical

Power

and

Treated Biosolids

Primary

digester

(35

days storage):

1,500

m3

@

$150/m3

Secondary digester

(35

days

storage):

1,500

m3

@

$150/m3

Heating

system

to accelerate

process

(3BoC),

Mixing

system.

Substrate

feeder

(corn

stalks).

Bunker silo

(500

m3).

Digestate

storage (treated liquid

storage)

(30 days).

1,155

x

$100/m3.

Septage/biosolids

receiving

station.

GHP

generator

set.

Generator

set

installation.

Site

development: road,

landscaping,

etc.

lnterconnection

of

electrical

power

produced

with

Hydro One

grid

system.

Power

line

from treatment

system

to

Hydro

One

grid.

Estimated

Total

Construction

Cost

(excluding

GST)

Soils lnvestigation

and Material

Testing

Commissioning of

treatment system.

Class

Environmental

Assessment

Engineering

(115%)

Contingency

( 10%)

2.

3.

4.

5.

6.

7.

B,

o

10.

i1.

12.

13.

$225,000

$225,000

$40,000

$60,000

$60,000

$40,000

$115,000

$50,000

$145,000

$60,000

$45,000

$50,000

$25,000

$1,l4o,ooo

$18,000

$25,000

$70,000

$171,000

$114,000

TOTAL ESTIMATED PROJECT COST

(2006)

(exctuding

GST)

$1,538,000

G12003\1

00\1

0301

2\Reports\Table

4.wpd


22/38

Anaerobic

Treatment


To

Produce

Biogas,

Electrical

Power and Treated Biosolids

Township

of

Chatsworth/Township

of

Georgian Bluffs

4-3

4.2

Treatment

Facility Lavout and Site

Plan

The

proposed septage/biosolids

treatmentfacility

is

proposed

to be

located

at the

existing

Derbywastewater

treatment

plant

site

in

the ownship of Georgian

Bluffs.

The location

of

the

proposed

treatment facilities,

anaerobic

digesters

and biogas

electrical

power

generator

are

shown

on

Figure 4. The site

is

located

in a

relatively

isolated

area that

is

well buffered with

no

homes

in the

immediate vicinity,

The

treatment

facility

will

consist

of

approximately

two

(2)

10

m

concrete

primary

and secondary anaerobic digesters, a

septage

receiving station,

a concrete corn stalk

bunker

storage facility, a 1,155 m3 thirty

(30)

day storage

facility

for

digestate

liquid

storage

of the

treated

biosolids,

biogas

generator

to

produce power

into

the electrical

grid

and

site

development

as shown on

Figure

4. The

existing wastewater

treatment

plant

would be

able

to

provide

some contingency

backup for

the

septage treatment

systern,

lt is

estimated

that 500 tonnes of corn stalks

per year

would

be

required.

The stalks

will

produce

more biogas

than

silage,

therefore

it is recommended

that after

the corn

is

taken

off

from

the

fields,

that the

corn

stalks then be collected

and

utilized

in

this system,

making

a

beneficial

use for corn stalks and

adding

value

to

the farmer

growing

corn. lt

is

estimated

that

approximately

40

hectares

(100

acres)

of

corn

stalks

would

be required

per

year.

Suitable

agricultural

land

will

be

required

to

dispose

of

thetreated digestate

(liquid)

through the

period

of

April

1't

to

November

30

of

each

year.

lt

is

proposed

that

no

disposal

of

this

materialwill

occur

from

December 1st

to March

30th

each

year,

when the soil

is

frozen,

and

snow

is

on

the

ground,

lt

is

estimated that

approximately

250 hectares

(625

acres)

of

approved

agricultural land will

be required

for

each

five

(5) year

period

to

dispose

of

the liquid

digestate.

This is

an

estimation only,

and

it

could

be

somewhat

less than this, depending on

treatment

and application

quntities

allowed.

Depending

on

how the

land

is utilized

a minimum

of 87

hectares

(220

acres)

of

land

would

be

sufficient

to

dispose

of

the

digestate

in

any

one

year.

lt

is

my understanding that

this digestate

is

essentially

odourless, has

99.57o

removal of

pathogens

and

has still

retained

the

nutrient

value from

the original

waste. The

amount

of disposal

of

solids will be only approximately

2o/o, or 200

m3,

which

can also

be

spread on agricultural

land.

4.3

Estimated

Proiect Gost

The

estimated

project

cost is shown on

Table

4. The

total estimated construction

costs are

$1,140,000,

lt

is estimated

that a

Class

Environmental

Assessment

will

be required

at

an estimated cost

of

$70,000.

The

project

cost estimate

also

includes

a contingencyof

approximately 10%. Therefore

the

total estimated

project

cost in

2006 dollars

is

$1,538,000.

Project #103012

HelogRsoru Poooru

June

2006


23/38

Anaerobic Treatment

of

Septage/Biosolids

To

Produce

Biogas, Electrical Power

and

Treated

Biosolids

4-4

of

Chatsworth/T,

Bluffs

4.4 Estimated Operational

Costs

The

estimated

operational costs

are outlined

in

Table

5.

There

is

an

operational

cost using pilot

oil to bring

the

digesters

up

to

the required

temperature.

Other

operational

costs

are

the

maintenance

of

the

engine/

generator,

a

cost for

corn

stalks,

operator

for

the

system,

and

also

disposal

of

treated biosolids. lt

has

been

estimated that

it would

be

$15/m3

to

dispose

of

the

treated biosolids

which

is a major

operational

cost

item

at

$153,300

per

year.

Therefore

the total

estimated

(2006)

annual

operating

cost would

be

$205,800.

Project

#103012

HEHoensoru

Plooot

June 2006


24/38

TABLE

5

Annual Project

Operational

Cost

Estimate

(2006)

Operational

Costs: Annual

(2006)

1.

Pilot

Oil

1.8 litre/hr x 8,760

hr/yr

x

$0.90

2. Engine (Generator)

Maintenance

876,000

kwh/year

x

$0.015/kwh

3.

Corn stalks:

500

tonnes/yr

x

$3O/tonne

4.

Other

operationalcosts:

-

System Operator

t

hrlday

@

$2glnr

(including

benefits)

365

x

$28

5.

Disposal of

treated

septage/biosolids:

10,220

m3

@

$15/m3

$14,200

$13,100

$15,000

$10,200

$153,300

Total

Estimated

OperationalGosts

(excluding

GST)

9205,800

G:9003\1

00\1 0301

2\Reporls\Table

5.wpd


25/38

Anaerobic

Treatment


To

Produce

Biogas, Electrical

Power and Treated Biosolids

Township

of

Chatsworth/Township

of Georgian

Bluffs

5-1

5.0

FINANCIAL ANALYSIS

A

financial

analysis

of

the

feasibility of

a

septage/biosolids

treatment system to

produce

electrical

power

and

treated

biosolids has

been carried

out. Table

6

summarizes

the

financial

analysis

of

the

project.

The

project

cost estimate

in

2006 dollars

is

$1,538,000.

The

annual

operating

cost estimate

for 2006

is

$205,800/year.

It is

proposed

that the

annual tipping fee for

septage

would

be

$35/m3

which would

translate

into

$140

for

a

typical

4

m3 residential

septic

tank.

lt

is

recommended

that individual

residential

septic tanks

be

pumped

out

every three

(3)

years.

Therefore, this

is

a

cost

of

$47lyear

for treatment of their

septage. The annual

tipping

fee

for septage/biosolids

would

be

$357,700.

The

annual

revenue from electrical

power

would

be

$96,400.

The

total

annual

revenue is

$454,100

and

the annualoperating

cost is

$205,800iyear.

Therefore the

net

revenue

per

year

is

$248,300ar.

Using

3o/o

real

interest rate

per

year,

the

payback

of

the capital cost

of

$1,538,000

is

shown to

be

approximately seven

(7)

years.

Project

#103012

HENDERSoN

Plooort

June 2006


26/38

TABLE

6

Financial

Analysis

of

Treatment

of

Septage/Biosolids

to

Produce Electrical

Power and

Treated

Biosolids

Project

Cost

Estimate

(2006)

Annual

Operational

Cost Estimate

(2006)

Revenue

1.

2.

Electrical

power

per

year

(200)

2,400

kwh

x

$0.11

x

365

Annual tipping

fee

for septage/biosolids

10,220

@

$35/m3

($tO

per

typical residential

septic

tank

every

three

(3) years

-

$47lyr

$1,538,000

$205,800

$96,400

$357,700

Total

Annual Revenue

AnnualOperation

Cost

Net Revenue

$454,100

$205,800

$248.300

The

pay

back

of

the capital cost

is

estimated

using a

3o/o

real interest

rate/year

(6.230

x

$248,300)

=

$1,546,900

Seven

G12003\1

00\1

03012\Rporrs\able 6.wpd


27/38


28/38

Anaerobic

Treatment

of

Septage/Biosolids

To

Produce

Biogas,

Electrical

Power and

Treated

Biosolids

Township

of

Chatsworth/Township

of

Geoglqn Bluffs

6-1

1.

2.

3,

4.

5..

6.

7.

6.0

RECOMMENDATIONS

Based

on the

fact that more than

3,000

of

the

proposed

type of

anaerobic digestion

of

organic matter

systems

have

been utilized

in Europe

to

produce

biogas

and

electricity, this

project

should

be

pursued

bythe

Township

of

Georgian

Bluffs and the

Township

of

Chatsworth.

The

Township

of

Georgian

Bluffs

and

the

Township of

Chatsworth

should

proceed

with

this

project

based

on

the following:

The

proven

viability of this type

of

project

in

Europe.

The

financial

analysis shows

a

seven

(7)

year

payback.

Production

of

electrical

power worth

$96,400

from

a green

source

(biogas)

per

year.

The

benefit

to

localfarmers

to

utilize

waste

corn stalks to

produce

biogas,

providing

added value

to

field corn

production.

Provides

a treated

biosolids

product

wth 99.5%

pathogen

removal,

essentially

odourless

and

beneficial

nutrient

and soil

amendment

value.

Additional

employment

for municipal

employees.

Additional

work for

contractors

in

the area.

Respectfully

submitted:

HENDERSON

PADDON

&

ASSOCIATES

LIMITED

Designated

Consulting

Engineer

Senior

Water

Resources

Engineer

MRS/dlw

Project

#103012

HeruoeRsoN PRooott

June 2006


29/38


30/38

ir ir

I--

.f,_

iI_

I-_

.r

:II

:"

a._

.

PIIYSICAL

ANO

CHEI

ICAL e'ARACTER|SilCS

OF SEPTAGE,

,

AS

FOLND

tN

THE

LmRATURE,

WTH SUOG.ESTED

DEStcN

VALES.

.

Unlled

States (S)

(g-ts)

Mitlmum.

flaxlmum

,.Variancc.

Suggested

isign

Value.,

Paramalr

Average

.

Minirnum

Maxmrrn Vad4ncc

Average

EPA

Mean

.

TS

,

Tys

34,'l06

23.100

619

1?:2

38OO

25,260

40,000

25,000

1,13?

130.471

,..

l1s

353 i102

202

2{fg.'

i2g;E6o

160

6?,5/.0

33,.800

31,600

TSS

;v.ss

:

BODo

coo

..TKN

NHl.N

12,862

9,427

6.,480

31,900

588

97

3lO

$,978

95

51,500

.

440

7E600

.

r,500

703,(Xp

301

542

179

469

45,000

29,90.0

9:s9

29,975.

5,000 70,920

f,000

'

52,370.

700

25,.0(X,

1,3@

1.14,870

13,000

15;000

'8,720

1q,O00

5,000 7,0(x)

..

42.850

f

5,00p

14

13'

.go

'88

66

3

1,060

:

'fi6

..

'

1t

150

g

TotalP

21o

20

.760

gs

tss

'

20

'

636'

a2 zss'

zso

Alkaflnlly

522

4,190

:

1.,000.

Grease

5,600

20t^

29,36g 112

:- :

g,o9o.

g,o0o

,

1.5 ,tz6

8.0

5.2,

9.0

6.9

6.0

l-As

1lo

.200

2

pl'f


31/38

I

I

I

I

I

I

i

.

.TABIE

No.

ej

.

:

COMPARISON

OF SEPTAGE

AND

IIUNICIPAL

WASTEWATER:.

'

'

.

,.

Parameter

Septagd

Wastewatef

Values

expresscd

as m.g/l,.

ercept

lor

pH

'

fRcnox:

-T"ll"-I?-

3-r|c- uol[g

fgotngtes

s

taken

liom

the usEPA

Hanoook

entied

.Sepage

Tre'anen

' DisposaF1984,

EPA{25-84-OO9andisdesnated.hthatdocrmenr*-rU+':..-

-'.'-:--'-

"--.1,

.


32/38


33/38

te3o\?-

GUIDH-INES

FOR THE DESIGN

OF

SE\,VAGE

TREATMENT

\dORKS

JI.JLY

1984

The

Honourrble

ndrew

S-

Brandt

l'lf

nister

Brock

-

Snith

Deputv 'linister

MinistrY

of

the

Environment


34/38

163

from existing plants

may

be

unsuitable for

use

in

design.

Before

sludge

data is

used

fordesign, it

should

be

assessed

for its accuracy.

Ifhen reLiable

data

are

not

avairabl-e,

'the

sludge

generation

rates

and

characteristics

given

in

Table

16.I

may

be

used.

L6.2

ANAEROBIC

DIGESTION

Anaerobic

digestion

systems

produce

digester

gas

which

has, as it's

man

constituent, methane.

To

safeguard

anaerobic

digest.er

and

gas

randling

system design,

CANI:B1OS-M81,,Installation

Code

for Digester

Gas

Systems,,

[43].

has

been

prepared

At

present,

t.he

Canadian

Gas

Association,

if

requested,

will

carry

out

a review

of

designs

of

anaerobie

digester

gas

syst.ems

on

a fee for

service

basis

prior

to

co,ngtruction.

Certific,ation

of

the

gas

srstems

will

only

be

granted

followng

nspection

of the

constructed

.works

by

the

Canddl{.aq.

Gqs

Assosiation

Digestion

.s,ystems

should

be

d-esigired

with

features

and

in

accordnce

with

desig.n

para-

metersr

s

followss

Number

of

stages

two;

Number

of

digesters

n

eah

stage

in

smaf

plants,

one, provided

that

flexi-

bility

is

provided

to

allow

either

stage to

'receive

raw

sludge in

emergencies;

number

of digesters in

each

stage

of large plants

'

..'.i

11 ha

-l

.i^e,t

a\,.

^-i

-^-


35/38

16-5

Volatile

solids loading

to

primary

digester

650-1600

g/m3a

i

Nominal

minimum

hydraulc retention

tj'me

in

primary

digester

15

days

(theoreticat

sRT

requirement

of

slowest

methane

producers

is

approximately

I0

days);

Mixing

-

torough

mixing

via digester

gas

(compressor

power requirement

5 to

B

W/m3)

or

mechanical

means

(6.6

w/m3)

in

tl-e

prJ-mary

stage

will

be necessary

in

all

cases

when digesters

are

ProPosed;

digester

mixing studies

are

now

being

carried out

to

more

precisely

determine

mixing

requirements

Heating

-

treating

rnust,

t

least,

b

provided

for

the

prmary

digestef,:

so

that a

teinperature

of

35oC

can

be

manta.ined.

External

heat

exchanger

systems

are

preferred.

tleating

should

be

via.

a

dual-fuel

boiter

system

usJ.ng

dgese.tr

gas

and

natural

gasr

or

o1;

.Digester

covers

to

provide gas

,storage

volume

and

to

main-

tain

uniform

gas pressures,

a

separate

gas

storage sphere

sould

be

provided

or at

least

one digester

eover

should

be

of

the

gas-holder

floating

typet

if

only

one

'floating

cover

is

provided,

it

shouLd

be

on

t}.e

secondary

digesteri insulated

pressure


36/38

16

6

and vacuum

relief,

valves

and

f,larne

traps

shotld be

provdedi

access

manholes

and

.

samplingr

wells

should

also

be provided

on

the

digester

co\ers

.

St,eel

is

the

most

commonly

used

material

fo.r dgester

covers.

Hotever,

other

properly

desgned

and

constructed

materials

are also

successfully

employed

such

aa

concrete

and

fbregLass.

Secondary

dgester

sizing

-

the

seco'ndary

diges.ter

should

be

sized

to

permit,

solids

settling

for.decanting

and

solids

thekenng

operatons,

and

in

conjunction

wit,r

possbl.e

of,f-site

f,acl_

tes,

to

provide

the

necessary

digested

sludge

storage;

t'he

necessary

total

storage

time

will

depend

upon

the

means

of ultimate

sJ-udge

disposal, with

tlle

greatest

tme

required

with

soil

condi.ti,onnE

operat,ions

(wi,nt,er

st,onage),

and

with

J,ess

storage

requ,rcid

w.ith

1endfJ-.Ing

or

i.ncfneration

ultimate

dsposal.

method,g,

o,f.f,s,it,e

storage

in

sludge

lag,oens,

tqd'ge

storagg

tankE

t

et

otter

f,acilite.E,

may,

be

wse.d

to

supplement

the

storage

capacit]r

of the

secondry

dgesterr if, hgh-rate

prima.ry

digesters

are

usd

and

ef,ficent

dewatering

within

the

secondary

dgester

is

required,

the

secondary

digester

must

be

conservatively

sized

to

allow

adequate

solid

separaton

(secondary

Lo

primary

sizi.ng

ratios

of

Zzi-

to

4:L

are

reconmended).'


37/38

Anaerobic Trealment of Seplagp/Biosofds

To Prodrce

Biogas, Electil

Pcltrer

and

Treed Eolirls

Township

ol@9eorgian

Btrffs

Appendlx

G'

Typical

Araerobic

Digestlon

of

Cattle

Manure

System

to Produce

Biogas

and

Elec,trical

Power

'HE$EhSoN

Picnou

qect

#1012

Jrrffi


38/38

Anaerobic Treatment

of Septage/Biosolids To

Produce

Biogas, Electrical

Power

and Treated

Biosolids

Township

of Chatsworth/Township

of

Georqan

Bluffs

2. anaerobic treatment of septage & biosolids june 15, 2006

Documents