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1

from bio waste to waste water treatment

Sewageplant Baden-Baden•Sinzheim,

Use of activated carbon

in 4th Purification Stage landfill

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1. presentation Eigenbetrieb Umwelttechnik

2. need for action and preliminary study

3. approach /idea

4. implementation

from bio waste to waste water treatment

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landfill

green waste plant (13.000 to /a)

sewage plant

sewage

System (400 km)

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2. need for action

- Process of the local biowaste into presscake and liquid - other ways of useage - current problem of tracers in public waters - negative effect to the ecological system - one source are the discharges from wwtp

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economical structur 21 clinics 20 spas

population structure

- share of population < 10 years 7,7 %

11 - 20 years 8,9 % 21 - 30 years 9,8 % 31 - 40 years 10,6 % 41 - 50 years 16,4 % 51 - 59 years 13,1 % 60 - 69 years 12,7 % 70 - 79 years 12,6 % 80 - 89 years 6,6 % >90 years 1,6 %

63 %

Sewageplant

Baden-Baden•Sinzheim

capacity: 200.000 population equivalent

treated wastewater 10 Mio. m³/a

connected residents 83.000

guests/tourists per year 1.000.000

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substance groups

- pharmaceutical agents

- chemicals from industry

- PAH

- pesticides

- cosmetics (personal care-products)

substance groups

single substances Anwendung

pharmaceutical agents

Carbamazepin* Antiepileptikum Mirtazapin Antidepressivum Diclofenac*

Schmerzmittel pain killer

Ibuprofen* Naproxen Gabapentin Metoprolol* ß-Blocker Sulfamethoxazol* Antibiotikum Lidocain Betäubungsmittel

chemicals from industry

1H-Benzotriazol* Korrosionsschutzmittel 4-Methylbenzotriazol

5-Methylbenzotriazol TCEP

Phosphorflammschutzmittel flame retardant

TCPP TDCPP Perfluoroctansulfonat (PFOS)

Perfluorierte Tenside (PFT) Perfluoroctansäure (PFOA) Bisphenol A Rohstoff für Polycarbonate Nonylphenole**

Tensidinhaltsstoff 4t-Octylphenol** Benzothiazol Gummiherstellung,

Gummiadditive Methylbenzothiazol (MTBT) Benzophenon

UV-Stabilisatoren Oxybenzon Octocrylen

PAH

Phenanthren Polyzyklische aromatische Kohlenwasserstoffe (Verbrennungsprodukte)

Anthracen Fluoranthen Pyren

pesticides

Mecoprop Herbizid (auch urban)

MCPA Terbutryn Biozid (auch urban) DEET Insektenrepellent

cosmetics (personal care- products)

Triclosan Desinfektionsmittel Phenoxyethanol

Phenoxypropanol Galaxolid (HHCB)

Synthetischer Duftstoff HHCB-Lacton Tonalid (AHTN) Methyldihydrojasmonat Patchouliethanon

others Coffein Genussmittel TAED Hilfsstoff in Waschmitteln Indol u. 3-Methyindol Fäkalindikatoren

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80 % of the receiving water is discharged from the sewage plant

3. approach / idea

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use of activated carbon

costs on market

1500 – 2000 €/to

estimated need sewageplant Baden-Baden 300 to/a

costs for sewageplant Baden-Baden 450.000 – 600.000 €/a

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bio waste from Baden-Baden

wood chips fruit cores

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Pyreg- Plant Baden-Baden

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activated carbon

woodchips cherry stones miscanthus

aktivated carbon

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biowaste press cake

biowaste- processing

biowaste (raw material) 5000 to /a

belt dryer

dryed press cake

1000 to/a

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1.000 t/a 200 t/a

input - biowaste

output

-activated carbon

4. Implementation

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Implementation

• planninning conditions

• installation of PYREG-plant self produced activated carbon

• licensing conditions

• Possibility to adjust the plantsystem, in case of underperformance of tracer elimination

• dosage of self produced AC and sole costruction of filtration is not sufficient

• filtration also has to be used for tracer elimination

Implementation

• planning considerations

• application of recognised systems for tracer elimination

• verifying of combinations of systems

• tracer elimination by simultaneous dosage of self produced AC into the biological stage and/or further tracer

elimination in downstream filtersystem

• verifying of use of different downstream filtersystems

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26 2. Planerische Überlegungen

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granulated activated carbon –

Filter without dosage in

biological stage

dosage of powder activated carbon in

biological stage

biological stage

Sand Filter biological stage

secondary clarification tank

GAC Filter secondary

clarification tank

PAC

preliminary clarification tank

preliminary clarification tank

preliminary clarification tank

biological stage

secondary clarifier

PAC

GAC Filter granulated

activated carbon –Filter

with dosage in biological stage

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Necessary measures for use of self produced activated carbon

production of AC

• taken place in existing thermal unit (System PYREG)

processing activated carbon

• for achievement of fineness of powder AC absolutely necessary

• wet milling process in a eccentric-vibrating tube mill

• production of a pumpable suspension

dosage of actvated carbon

flexibility of dosing points

• dosage in return sludge

• dosage in each cascade

sectional view - buildings for processing

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• upgrade and conversion measures

• replacement of stirrers and Pumps, due to the abrasive effect of the PAC

• stirrers in denitrification zone

• recirculationpumps

• screw pump lifting equipment for return sludge

tasks / project ideas - process of self-produced AC to defined PAC - adding the PAC in the aeration tank cycle - simultaneous trace substance elimination in the aeration tank - separation via sludge removal secondary clarification tank - circulation guidance and multiple use via return sludge - protection level filtration for fines separation - partial operation filtration with GAC and sand filling imaginable

project goals

achieving very high total elimination rates for trace substances by

two- stage filtration

implementation of the idea of sustainability in the use of AC

Pyreg plant mill for

processing activated carbon

discharge pipe

dosage of activated carbon

optimisation of pump stations for

return sludge

optimisation of pump stations for

recirculation reserve area Filter

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thank you very much