BVT-Merkblatt zu Abwasser- und Abgasbehandlung

Example XXII
Annexes
Central waste water treatment of a chemical site producing organic and inorganic fine chemicals,
such as pharmaceuticals, pesticides and hydrogen fluoride.
Amount of waste water: about 300 m 3 /h
Waste water treatment consists of:
� stepwise neutralisation with lime to pH 9.5 to precipitate fluoride, sulphate and heavy metals,
flocculation and sedimentation
� high-load activated sludge aeration with clarifier
� low-load activated sludge aeration with clarifier
� third-stage biology, biocarb carrier biology to remove refractory COD, phenols and AOX
� exhaust air purification with GAC adsorption, further treatment by incineration
� sludge dewatering, sludge sent to cement industry or landfill.
Emissions:
COD: 123 mg/l
BOD 5: 13 mg/l
phenols: 0.5 mg/l
AOX: 1.1 mg/l
total-N: 16 mg/l
The central WWTP is illustrated in Abbildung 7.6.
Waste Water and Waste Gas Treatment 343