Wastewater from meat production

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Judith Rothbauer
vor 6 Jahren
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PRESTO Project workshop and International Forum WASSER BER-LIN INTERNATIONAL 23. 26.

1 PRESTO Project workshop and International Forum WASSER BER-LIN INTERNATIONAL , Berlin, Germany Wastewater from meat production Prof. Dr.-Ing. Peter Hartwig

2 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

3 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

4 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

5 BREF Standard values for wastewater from meat processing Parameter Unit Value BOD 5 mg/l COD mg/l NH 4 -N mg/l 10 Dry Solids mg/l 5-60 N tot mg/l P mg/l 2-5 Lipophilic substances mg/l 2,6-15

6 German Wastewater Directive Requirements for the wastewater from meat processing (Enclosure No. 10, 2-hour-mixed sample or grab sample) Parameter Unit Value BREF BOD 5 mg/l COD mg/l NH4-N mg/l N tot mg/l P mg/l 2 2-5

7 spez. Abwasseranfall [m³/schwein] spez. Flotatanfall, spez. ÜS SBR-Anfall [m³/schwein] aqua consult Specific wastewater flow (m 3 /pig) 0,350 Rohabwassermengen B+C Tönnies Fleischwerke Rheda bis , werktags Flotate (m 3 /pig) surplus sludge (m 3 /pig) spez. Flotatanfall, spez. Abwasseranfall, spez. ÜS SBR-Anfall spez. Abw asseranfall 0,070 0,300 spez. Flotatanfall spez. ÜS SBR-Anfall 0,060 0,250 0,050 0,200 0,040 0,150 0,030 0,100 0,020 0,050 0,010 0,000 0, Anzahl Schweine gesamt Number of pigs

8 Schlachteinheiten [SE] Abwasserkonzentration [mg/l] Abwasserfracht [kg CSB/d] aqua consult Development of the raw water characteristic COD-concentration Entwicklung (mg/l) der RohabwasserbelastungCOD-load (kg/d) Schlachteinheiten Number of pigs Abwasserkonzentration Concentration Abwasserfracht Load Year Jahr 0

9 Mechanical treatment - sievings Sieve to seperate feders

10 Mechanical treatment Hydrocyclon Sand removal

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

12 Flocculator for the dosage of precipitants and polymers

13 Flotation - sludge

14 Flotation - effluent

15 Biological treatment

16 Example: aqua consult Wastewater treatmentment Ingenieur for GmbH Tönnies slaughterhouse Rheda-Wiedenbrück (capacity 30,000 pigs per day)

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

17 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)

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

21 Bioilogical treatment after aqua flotation consult

22 Pilot plant for anaerobic treatment aqua consult

23 Anaerobic aqua consult reactors Volume 4 x 80 l

24 Digester for the co-fermentation under construction

25 Co-fermentation of the flotate

26 Components for the co-fermentation of flotate at the WWTP Rheda-Wiedenbrück Sludgewater treatment (PANDA) CHP-plant Anaerobic digester 2,8 MW el m m 3

27 Combined heat power plants, 2 1,4 MW el

28 Centrifuges (dewatered sludge, sludge water mg NH 4 -N/l)

29 Comparison of the nitrogen-removal over nitrate and over nitrite über Nitrat + NH NO NO N CSB/TKN: ~ 5, autotroph heterotroph über Nitrit + NH NO N CSB/TKN: ~ 3, autotroph heterotroph

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

31 Kläranlage Rheda - Übersichtsbild Pilotplant for nitritation Rheda-Wiedenbrück

32 Pilotplant Nitritation KA Dubai aqua consult Nitritation T= C

33 Growth rates of nitrosomonas and nitrobacter as a function of the temperature according HUNIK (1993) Versuche Rheda X Versuche Dubai X

34 y

35 D2 N2 Havarietank Storage N1 D1

36 Deammonification with Pellets, DEMON technology, WWTP Heidelberg

37 Hydrozyklon Pellets

38 Co-fermentation of flotate from slaughterhouses

39 Thermal Hydrolysis for hygienization aqua consult Hydrolyse

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