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

Bd,P = 18 kg P/slaughter day
Effluent plant:
- Pumping station with MID (red line)
Teil 3 Seite 4-45
- Pumping station (green line) and rain and wash water pumping station
- "Red line" sifting system (2 fine cylindrical sieves with a mesh size of 1,0 mm)
- Weekly equalising basin and compact bio-filter (V = 170 m 3 , equipped with two stir-
ring devices and fine bubble hose aeration with O2 control; outflow volume control based
on filling level measurement)
- 2 activation basins with preceding selector and de-phosphatisation basin (VSelector =
per 82 m 3 , VActivation = per 3.500 m 3 ) with pressure aeration (TSBB = 4 bis 5,3
kg/m 3 ); intermittent de-nitrification with approx. 1,5 to 2 h de-nitrification time and 1,5 to 2
h nitrification time; control on the basis of an NH4-N and an NO3-N measurement in com-
bination with O2 measuring equipment).
- Final treatment (1 Dortmund tank; A = 60 m 2 )
- Fine DynaSand filter (particle size: 1,2 to 2 mm; A = 5 m 2 )
Sludge treatment:
- Sludge feed vessel (V = 130 m 3 )
- Mechanical sludge thickening (Q = 25 m 3 /h)
- Sludge reservoir (V = 2.900 m 3 , TS = 5 %)
- Agricultural utilisation
Operating method:
(Measurement values from the period 1995 to 1997)
Load: 10.000 to 22.000 EW60 (only 5.000 EW60 during public holidays)
Solid matter content TSBB = 4,0 to 5,3 kg TS/m 3
Sludge index ISV = 50 to 95 ml/g TS
Age of sludge tTS = 30 to 40 days
pH value pH = 6,8 to 7,2
3
Return sludge solid matter content TS RS = 7 to 11 kg TS/m
Thickened slurry solid matter content TS = ~ 5 %, oTS = 60-70 %
Outflow values:
(Max. measurement values from the period 1995 to 1997)