CENTRAL COAST BLUE

ADVANCED TREATMENT DEMONSTRATION

FACILITY

One Community. One Water. One Future.

July 23, 2018

The motivation: extreme drought in California

The Players @ Pismo Beach Demonstration Facility

Central Coast Blue Utilizes shared infrastructure

for common benefit

PAGE 14

Lasting Water

Independence

5 Agencies

Managing water collaboratively and holistically

2018 20222019 2021

Preliminary Design, Technology

Piloting,

Environmental Review &

**Community Connection**

Operations Begins (Phase 1)

Groundbreaking (Phase 2)

Closer to Water Independence

Construction Kick Off

(Phase 1) Preliminary

Design (Phase 2)

Phase I Design and Permitting

Advanced Treatment Design;

Test InjectionWell

2016 –current

Extensive and

thorough

planning and

collaboration

2020

Complete Phase I Design

and Permitting

Central Coast Blue Design Process and Stage

Pismo Beach (Central Coast Blue) Demonstration Facility

7

• Technical details– MF: 4 PALL UNA MF elements

– RO: 8” DOW ECO-PRO 400 and 4” DOW BW30XFRLE-4040

– RO Recovery: 75-80%

– 2 RO stages, flux: 11-13.4 gfd; 10-11.2 gfd

– Permeate flow rate: 30-35 gpm

– Evoqua UV/AOP system, chemical-free

– Two Phase Testing to compare RO Operation Process

IDE Sponsored Pilot Plant

Pismo Beach Demonstration Facility Goals

9

1. Compare IDE’s ECO-FAT technology vs. conventional FAT

2. Tangible public outreach and educational tool, first on the central coast

3. Evaluate process data for the Central Coast Blue design team

Stage III:Standard RO

Stage I:Chloramination

No NDMA Formation

No membrane oxidation

Conventional FAT vs. ECO REUSE process

NH3 HOCl

Stage II:UF/MF

WWTP effluent

Stage IV:UV/AOP

No UVT Reduction

CEB &CIP Longer intervalsBetween CIP

NaCl

- Sequential cleaning of RO membranes by DOHS

- Conservation

Fe

DORO RO

DOHS is Direct Osmosis High

Salinity Flush Provides:

• Backwash

• Scouring

• Bacteria Dehydration

Eco Reuse Cleaning Process:

DOHS – Direct OsmosisHigh Salinity

Reject

POr 3 bar

Feed

ProductPOp 0.1 bar

PGr 12bar

PGp 1 bar

NDPRO = PGr-POr-PGp+PopNDPRO = 12 – 3 - 1 + 0.1 = +8.1 bar

NDP

DOHS Normal RO Process

POr 3bar

SalineSolution

bar Feed

Product

PGr 12 bar

PGp 1barPop 0.1 barN

DP30

NDPRO = PGr-POr-PGp+PopNDPRO = 12 - 3 - 1 + 0.1 = + 8.1 barNDP DO (FO) = 12 - 100 - 1 + 0.1 = - 88.9 bar

DOHS – Direct (Forward) Osmosis High Salinity

“osmotic backwash”

Reject

USA Pat.7,658,852; Australia Pat. 2005254337; Singapore Pat. 153812 Israel Pat. 169882 GB Pat. 1414263.2 GB PCT/IB2015/055665

USA Pat.7,658,852; Australia Pat. 2005254337; Singapore Pat. 153812 Israel Pat. GB 1414263.2 GB 1501243.8 Pat Pending

FeedN

aC

l

Vy

Vx

Vy

Vx

Vy

Vx

X

Y

Permeate

› Shear force increase along the feed-brine spacer

Vx on last membrane is 3 times higher than normal

› Vy diminishes proportionally:

Eco Reuse Cleaning Process:

DOHS – Direct Osmosis High Salinity

Turbidity levels increase in brine after DOHS, indicates that biofouling is reduced

DOHS Effect on Removal of Fouling

DOHS: Frequent removal of particles before a strong

van-der Waals interaction is created with the surface

Draw Solution 100

DOHS: Osmotic Dehydration of Bacteria

USA Pat.7,658,852; Australia Pat. 2005254337; Singapore Pat. 153812 Israel Pat. 169882 GB Pat. 1414263.2 GB PCT/IB2015/055665

Visualization of FO Backwash

18

Visualization test made by: Emily Tow, from in MIT Lab

DOW membrane, two years in operation

under DOHS conditions.

Test conducted in DOW Water and Process Solution

Element Evaluation Lab

After two years of operation membrane show performance as new membrane from the box

› 20

DO-HS Membrane Cleaning is absolutely safe for RO and NF membranes.

It is approved by all leading RO membrane manufactures.

Hydranautics Technical Bulletin: TSB107 Foulants and Cleaning

Procedures for composite polyamide RO Membrane Elements

(ESPA, ESNA, CPA, LFC, NANO and SWC)

http://www.membranes.com/docs/tsb/tsb107.pdf

Page 15

USA Pat.7,658,852; Australia Pat. 2005254337; Singapore Pat. 153812 Israel Pat. Patent GB 2519880

21

www.membrane-recovery.com

info@membrane-recovery.com

Plant Name Country Plant type

Capacity on which

DO-HS actually

operated

Beginning of

DO-HS Operation

Fertilizers and Chemicals Ltd “Deshanim-1” Israel BWRO 624 GPM May-05

Fertilizers and Chemicals Ltd “Deshanim-2” Israel BWRO 367 GPM Oct-08

Kibbutz Ma’agan Michael “Blue & Green RO Plant” Israel BWRO 267 GPM Oct-05

Kibbutz Ma’agan Michael “Maagan Htpala RO plant” Israel BWRO 1505 GPM Apr-06

Haifa Chemicals Ltd Industrial waste water RO plant Israel IWWRO 220 GPM Feb-09

Carmel Olefins Ltd, Industrial waste water RO plant Israel IWWRO 1981 GPM Feb-11

GE Water Mobile RO Plant USA BWRO 250 GPM Apr-11

City of Ontario CHINO USA BWRO 307 GPM Mar-12

Newton Energy Center USA BWRO 300 GPM Oct-11

Kranji PUB Singapore Singapore WWRO 1468 GPM May-12

Turtle Bay SWRO Cyprus Cyprus SWRO 128 GPM Jun-08

Anticline Disposal LLC USA WWRO RO-1 156 GPM September 2012

Anticline Disposal LLC USA WWRO RO-2 137 GPM July 2013

REFERENCE LISTInstallations of DO-HS Membrane Cleaning Technology

in Commercial Operation

Eco Reuse Phase: Microfiltration Performance

No Fe 53.5 ppm Fe2.5

ppm0

Eco Reuse Phase: MF – Stable Specific Flux (with Fe dosage)

RO Results: Good Specific Flux and Recovery with DOHS and Conservation

Recovery of ~80% proven in

DOHS/Conservation Mode

40

45

50

55

60

65

70

75

80

85

02/09 02/19 03/01 03/11 03/21 03/31 04/10 04/20 04/30 05/10

Re

cove

ry (

%)

Total 1st Stage 2nd Stage

Eco Reuse Phase: RO Recovery 75% to 80%

Eco Reuse Phase: Water Quality Results

•Acetaminophen •Atenolol •Caffeine •Carbamazepine •DEET •Fluoxetine •Gemfibrozil •Ibuprofen •Meprobamate •N-Nitrosodimethylamine •N-Nitrosomorpholine •Naproxen •Perfluorobutane sulfonate

•Perfluorobutanoic acid •Perfluorodecanesulfonate •Perfluorodecanoic acid •Perfluoroheptanoic acid •Perfluorohexane sulfonate •Perfluorohexanoic acid •Perfluorononanoic acid •Perfluorooctane sulfonate •Perfluorooctanoic acid •Perfluoropentanoic acid •Primidone

• Sucralose •Sulfamethoxazole •TCEP •Triclocarban •Triclosan •Trimethoprim

–30 CECS tested – 25 detected in secondary effluent, only 1 detected in the finished water – Sucralose 28 ng/L (3 log removal)

Marc

hB

oard

Meeti

ng

_V1.p

pt/

25

Eco Reuse Phase: UV AOP

• Less NDMA means less UV dose to meet 10 ng/L standard (maybe none?)

• UV AOP still needed for 0.5-log 1,4- dioxane destruction (but at what dose?)

Terminal Island Collimated Beam Test

(0.5-log removal of 1,4-D is about 1,200 mJ/cm2.)

SCVWD Collimated Beam Test

More Examples UVT Impact on UV Intensity and Efficiency in RO Permeate

00.20.40.60.8

11.21.4

0 500 1000 1500 2000

LRV

1,4

-Dio

xan

e

Measured UV Dose [mJ/cm2]

2 mg/L 4 mg/L Field 2 mg/L Field 4 mg/L

0

0.2

0.4

0.6

0.8

1

1.2

1.4

0 500 1000 1500 2000

LRV

1,4

-Dio

xan

e

UV Dose (mJ/cm2)

4 mg/L H2O2 6 mg/L H2O2 2 mg/L NaOCl 4 mg/L NaOCl 6 mg/L NaOCl

Eco Reuse Phase: Water Quality Results

ParameterSecondary

Effluent

RO Feed

(MF Effluent)

RO

Permeate

TOC [mg/L] 12.5 10.5 ND<0.3

Total Strontium [mg/L] 0.38 0.35 ND<0.01

Electrical Conductivity [S/cm] 1,460 - 33

UVT [%] - ~56% >100%

>1.54 LRV

>1.54 LRV

>1.65 LRV

• RO Permeate UVT >100%. Lack of chloramines has important positive impact

• Conventional RO systems with chloramines have 98% UVT (new membranes) and 96% UVT

(old membranes).

• Typical design UVT for UV AOP is 96% UVT

• …this difference in UVT has a large impact on efficiency

Eco Reuse Phase: Dose Capacity

Parameter Secondary Effluent [ng/L] Finished Water [ng/L]

NDMA 2.5 1.8

NMOR 2.3 0.81

No NDMA Means…

• Typical UV Dose for NDMA

Removal~1,000 mJ/cm2

• UV dose for 6-log adenovirus is 276

mJ/cm2

• So, what dose is needed for ½-log

1,4 Dioxane?

• If dose value is ~500mJ/cm2, there will be

substantial UV AOP savings

• Testing completed 5/23

UVT Impact on UV Intensity and Efficiency

4% change in UVT results

in 20% greater UV intensity

UVI as function of UVT UVI design range

• Stable MF and RO performance during Chloramine Free Operation

• DOHS is Effective preventive maintenance mechanism

• High specific flux

• High UVT (almost 100%) – major Lower CAPEX and OPEX savings

• MF and RO membranes intact (maintained integrity)

• Chloramine free! (no NDMA formation)

• Simpler process

• EQUALS LOWER COST OF WATER

Demonstration Facility Results: Eco Reuse Phase

Pismo Beach Demo Site - for public outreach

Questions/Discussion

Thanks and Credit to:

• City of Pismo Beach: Eric, Russ, Justin, Steve, Hailie, Bob, Lauren

• IDE, WSC, Carollo staff• Pall and Evoqua

Steve Wait

stevew@ide-tech.com