Wastewater from meat production

aqua consult Ingenieur GmbH Hannover Bremen Erfurt PRESTO Project workshop and International Forum “WASSER BER-LIN INTERNATIONAL” 23. – 26.04.2013, ...
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aqua consult Ingenieur GmbH

Hannover Bremen Erfurt

PRESTO Project workshop and International Forum “WASSER BER-LIN INTERNATIONAL” 23. – 26.04.2013, Berlin, Germany

Wastewater from meat production Prof. Dr.-Ing. Peter Hartwig

aqua consult Ingenieur GmbH

Hannover Bremen Erfurt

Content • Legal Frame • In plant measures for the reduction of the wastewater quantity and load • Proved technologies for the treatment • Energetic use of the residues • Nitrogen removal

aqua consult Ingenieur GmbH

Hannover Bremen Erfurt

BREF = Best available techniques Reference Document

• Detailed description of the production process • Definition of goals for the treatment as specific benchmarks • Basis for the legal requirements

aqua consult Ingenieur GmbH

Hannover Bremen Erfurt

BREF recommendations for meat processing industry • Providing of storage capacities which are bigger than the usual requirement • Regularly measurement of the wastewater characteristic and documentation • Avoiding of a longer storage times without movement of the wastewater • Removal of particles (dry before wet cleaning) • Removal of grease • …

Hannover Bremen Erfurt

aqua consult Ingenieur GmbH

BREF Standard values for wastewater from meat processing Parameter

Unit

Value

BOD5

mg/l

10 - 40

COD

mg/l

25 - 125

NH4-N

mg/l

10

Dry Solids

mg/l

5 - 60

Ntot

mg/l

15 - 40

P

mg/l

2-5

Lipophilic substances

mg/l

2,6 - 15

Hannover Bremen Erfurt

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German Wastewater Directive Requirements for the wastewater from meat processing (Enclosure No. 10, 2-hour-mixed sample or grab sample) Parameter

Unit

Value

BREF

BOD5

mg/l

25

10 - 40

COD

mg/l

110

25 - 125

NH4-N

mg/l

10

10

Ntot

mg/l

18

15 - 40

P

mg/l

2

2-5

Hannover Bremen Erfurt

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Specific wastewater Flotate Rheda (m3/pig) Rohabwassermengen B+C Tönnies Fleischwerke flow (m3/pig) spez. Flotatanfall, spez. Abwasseranfall, spez. ÜS SBR-Anfall surplus sludge 01.01.2004 bis 31.12.2004, werktags3 (m /pig) 0,350

0,070 spez. Abw asseranfall spez. Flotatanfall

0,060

spez. ÜS SBR-Anfall

0,250

0,050

0,200

0,040

0,150

0,030

0,100

0,020

0,050

0,010

0,000

0,000

8.

00

0

. 10

00

0

. 12

00

0

. 14

00

0

. 16

00

0

. 18

00

Anzahl Schweine gesamt

0

Number of pigs

. 20

00

0

. 22

00

0

. 24

00

0

spez. Flotatanfall, spez. ÜS SBR-Anfall [m³/Schwein]

spez. Abwasseranfall [m³/Schwein]

0,300

Hannover Bremen Erfurt

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Development of the raw water characteristic Entwicklung COD-concentration (mg/l) der Rohabwasserbelastung COD-load (kg/d)

12.000 10.000

50.000

Schlachteinheiten Number of pigs Abwasserkonzentration Concentration

45.000

Abwasserfracht Load

35.000

40.000

30.000

8.000

25.000 6.000

20.000 15.000

4.000

10.000 2.000

5.000

0

0 1998

1999

2001

2002

Year Jahr

2003

2004

2005

Abwasserfracht [kg CSB/d]

Schlachteinheiten [SE] Abwasserkonzentration [mg/l]

14.000

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Mechanical treatment - sievings Sieve to seperate feders

Hannover Bremen Erfurt

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Mechanical treatment Sand removal

Hydrocyclon

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Hannover Bremen Erfurt

Mechanical treatment – Sludge removal with Flotation (chem-phys.)

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Hannover Bremen Erfurt

Flocculator for the dosage of precipitants and polymers

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Hannover Bremen Erfurt

Flotation - sludge

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Flotation - effluent

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Biological treatment

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Example:

Hannover aqua consult Bremen Ingenieur GmbH Erfurt Wastewater treatmentment for Tönnies slaughterhouse Rheda-Wiedenbrück (capacity 30,000 pigs per day)

aqua consult Ingenieur GmbH

Hannover Bremen Erfurt

Treatment steps • Pneumatic pumping station for pumping the wastewater directly to the municipal treatment plant (2,3 km) • Mechanical treatment (sieve, hydrolcyclone) • First biological treatment (nitrifikation, denitrification) • Final biological treatment together with the municipal wastewater • Flotate and surplus sludge are fed to a biogas plant (co-fermentation with the municipal sewage sludge)

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Hannover Bremen Erfurt

aqua consult Ingenieur GmbH

Hannover Bremen Erfurt

Flotation for slaughterhouse aqua consult wastewater Ingenieur GmbH 85 % COD and 65 % N-removal Flotation - Flotate used for biogas production -

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aquaflotation consult Bioilogical treatment after Ingenieur GmbH

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Pilot plant for anaerobic treatment aqua consult Ingenieur GmbH

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aqua consult Anaerobic reactors Ingenieur GmbH

Volume 4 x 80 l

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Digester for the co-fermentation under construction

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Co-fermentation of the flotate

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Components for the co-fermentation of flotate at the WWTP Rheda-Wiedenbrück Sludgewater treatment (PANDA)

CHP-plant 2,8 MWel

Anaerobic digester 5.000 m3 6.500 m3

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Combined heat power plants, 2 • 1,4 MWel

Hannover Bremen Erfurt

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Centrifuges (dewatered sludge, sludge water ≈ 2.500 mg NH4-N/l)

Hannover Bremen Erfurt

Hannover Bremen Erfurt

aqua consult Ingenieur GmbH

Comparison of the nitrogen-removal over nitrate and over nitrite über Nitrat NH 4+

NO 2

-

autotroph

NO 3

-

N2

CSB/TKN: ~ 5,5

heterotroph

über Nitrit NH 4+

NO 2 autotroph

-

N2

heterotroph

CSB/TKN: ~ 3,6

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Hannover Bremen Erfurt

Growth rates of nitrosomonas and nitrobacter as a function of the temperature according HUNIK (1993)

aqua consult Ingenieur GmbH Kläranlage Rheda - Übersichtsbild

Hannover Bremen Erfurt

Pilotplant for nitritation Rheda-Wiedenbrück

Pilotplant Nitritation – KA Dubai

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Nitritation T= 35 - 40 °C

Hannover Bremen Erfurt

Hannover Bremen Erfurt

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Growth rates of nitrosomonas and nitrobacter as a function of the temperature according HUNIK (1993)

Versuche Rheda

X

Versuche Dubai

X

y

Hannover Bremen Erfurt

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D2

N2 D1

Havarietank

N1

Storage

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Deammonification with Pellets, DEMON technology, WWTP Heidelberg

Hannover Bremen Erfurt

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Hannover Bremen Erfurt

Hydrozyklon

Pellets

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Co-fermentation of flotate from slaughterhouses

Hannover Bremen Erfurt

Thermal Hydrolysis for hygienization

aqua consult Ingenieur GmbH Hydrolyse

Hannover Bremen Erfurt

aqua consult Ingenieur GmbH

Hannover Bremen Erfurt

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