298 94 307/02 Untersuchungen zum Stand der Umsetzung des ...

298 94 307/02 Untersuchungen zum Stand der Umsetzung des ... 298 94 307/02 Untersuchungen zum Stand der Umsetzung des ...

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Teil 3 Seite 4-37 Table 4-8: Data from a waste water treatment plant of a slaughtering plant in Germany). Parameters Emission levels (Maximum ever measured 1995 – 1997) (mg/l) COD 47 BOD5 N-tot 11 NH4-N 3.7 P-tot 0.8 Specific information about how techniques have been developed for specific use slaugh- terhouse or animal by-products activities was sought. Due to the lack of such information, only general information on waste water treatment techniques used in the industry can be provided in the BREF. Applicability Applicable in slaughterhouses and rendering plants. Economics The technique is considered to be economically advantageous because all of the proc- esses can be undertaken in one tank. Driving force for implementation Example plants At least one slaughterhouse and 2 rendering plants in Germany. Table 4-9 Example 1 Total volumes, aeration tank 1,803 m³ Value de-nitrification:value nitrification (ratio) 0.33 Inflow (Qd) 100 m³/d link to BOB/d and BOD/m 3 Mixed-liquer suspended solids in the aeration tank 3.5 g/l BOD – load 346 kg BOD/d see above NH4-N – load 90 kg NH4-N/d COD:N (ratio) 5.6:1 BOD – volume load 0.19 kg BOD/(m³·d) N – volume load 0,05 kg N /(m³·d) BOD – sludge load 0.05 kg BOD /(kg TS·d) N – sludge load 0.015 kg N /(kg TS·d) Excess sludge incidence 66 kg/d 7

Age of sludge (tTS) Is this of special sig- nificance Teil 3 Seite 4-38 95 d Specific O2 consumption for BOD 2.09 kg O2/kg BOD Specific O2 consumption for N 1,91 kg O2/kg BOD Flow of return sludge 43 % Influent load (kg/d) Volume (m³/d) concentration (mg/l) COD 504 100 5040 BOD 346 100 3460 NH4-N 90 100 900 Parameters Aver- BOD5 homogenised mg/l COD homogenised mg/l age Minimum Maxi- mum 3.1 1 8 65.4 35 125 NH4-N mg/l 10.0 0.3 29 NO3-N mg/l 2.4 0.3 7.7 NO2-N mg/l 1.8 0.7 4 P total mg/l 1.8 0.3 4.3 AOX mg/l 0.015 < 0.01 0.02 Table 4-10 Example 2 Total volumes, aeration tank (VBB) 7000 m³ Mixed-liquer suspended solids in the aeration tank (TSBB) 4 – 5,3 g/l BOD – load (Bd-BOD) 2.020 kg BOD/d TKN (Kjeldahl-nitrogen) – load (Bd – TKN) 360 kg TKN /d pH 6,8 – 7,2 BOD – volume load (BR - BOD) 0,29 kg BOD/(m³·d) TKN – volume load (BR – TKN) 0,051 kg TKN /(m³·d) BOD – sludge load (BTS – BOD) 0,072 kg BOD /(kg TS·d) P – sludge load BTS (BTS - P) 0,00064 kg P /(kg TS·d) TKN – sludge load BTS (BTS - N) 0,012 kg TKN /(kg TS·d)

Age of sludge (tTS) Is this of special sig-<br />

nificance<br />

Teil 3 Seite 4-38<br />

95 d<br />

Specific O2 consumption for BOD 2.09 kg O2/kg BOD<br />

Specific O2 consumption for N 1,91 kg O2/kg BOD<br />

Flow of return sludge 43 %<br />

Influent load (kg/d) Volume (m³/d) concentration (mg/l)<br />

COD 504 100 5040<br />

BOD 346 100 3460<br />

NH4-N 90 100 900<br />

Parameters Aver-<br />

BOD5 homogenised<br />

mg/l<br />

COD homogenised<br />

mg/l<br />

age<br />

Minimum Maxi-<br />

mum<br />

3.1 1 8<br />

65.4 35 125<br />

NH4-N mg/l 10.0 0.3 29<br />

NO3-N mg/l 2.4 0.3 7.7<br />

NO2-N mg/l 1.8 0.7 4<br />

P total mg/l 1.8 0.3 4.3<br />

AOX mg/l 0.015 < 0.01 0.<strong>02</strong><br />

Table 4-10 Example 2<br />

Total volumes, aeration tank (VBB) 7000 m³<br />

Mixed-liquer suspended solids in the<br />

aeration tank (TSBB)<br />

4 – 5,3 g/l<br />

BOD – load (Bd-BOD) 2.<strong>02</strong>0 kg BOD/d<br />

TKN (Kjeldahl-nitrogen) – load (Bd –<br />

TKN)<br />

360 kg TKN /d<br />

pH 6,8 – 7,2<br />

BOD – volume load (BR - BOD) 0,29 kg BOD/(m³·d)<br />

TKN – volume load (BR – TKN) 0,051 kg TKN /(m³·d)<br />

BOD – sludge load (BTS – BOD) 0,072 kg BOD /(kg TS·d)<br />

P – sludge load BTS (BTS - P) 0,00064 kg P /(kg TS·d)<br />

TKN – sludge load BTS (BTS - N) 0,012 kg TKN /(kg TS·d)

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