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

Teil 3 Seite 8-36
- method combinations of anaerobic stages in the part-stream or mainstream and aero-
bic stage under certain conditions,
- method combinations of biological and physical-chemical stages for nitrogen elimina-
tion.
Table 8-5 shows the reference parameters of the treated wastewater.
Table 8-5: Reference parameters of biologically treated wastewater from TBAs and spe-
cial plants with nitrogen elimination (results from official examinations in 6
Parameter Minimum
COD homogenised mg/
l
BOD5 homogenised mg/
l
NH4-N mg/
l
NO3-N mg/
l
NO2-N mg/
l
anorg. N total mg/
l
P total
mg/
AOX mg/
l
l
plants in NRW, NI and BY; n = 51)
Single values Average values
Maximum
Minimum
Maximum
30 125 42 65
1 20 3,1 6
0,3 39 < 0,9 12
< 0,1 52 1)
< 0,5 26
0,01 4,0 0,03 1,8
0,5 62,1 2)
0,05 33 3)
3,6 34
0,15 11,9 1)
< 0,01 0,03 0,015 0,02
GF 2 2 2 2
1) 1 value of 51 (= 2%)
2) 94,5 % of all results < 50 mg/l
3) contains plant with its own blood processing unit
8.2.5.1 Solids
8.2.5.2
General Techniques (housekeeping)
Measures on location and during the transport
The meat meal industry is a particular case due to the fact that the loads resulting from
the respective plants is due to the condition and the kinds of the raw material that is to be
processed. Both these parameters, however, are beyond the control of the respective
plant, because these parameters are mainly influenced by the conditions at the location
where the raw material is produced. Thus, these conditions must also be considered.
One needs to mention in the first place the measures which are to prevent the decay of
the raw material. Thus, the raw material must not only be protected against the sun and
other weather conditions already at the point of production, but it must be stored in special