C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 3/04 (2006.01) C02F 1/66 (2006.01) C05F 17/00 (2006.01) C05F 17/02 (2006.01) C12S 5/00 (2006.01)
Patent
CA 2138635
14 Abstract Process for reducing the pollutant content and for reducing the ammonium content and the COD and BOD5 values in waste water from composting A process is described for reducing the pollutant content and for reducing the ammonium content and the COD and BOD5 values in waste water from composting, wherein a) the waste water from the composting process is separated off from solids, b) the waste water is freed of sludge and then applied at least once from above onto a filling formed from the biomass from the composting process with a particle size of > 25 mm and owing to the action of gravity seeps through between the particles of the filling and runs away downwards, the waste water laden with sludge and solids is separated off from solids and sludge and a portion of the quantity of water is discharged, c) the exhaust air from the composting process is passed as an air stream from bottom to top through the filling according to process step b) in order to achieve aerobic fermentation and the waste water is set to a temperature of 25°C to 35°C by the exhaust air, d) the exhaust air from the purification according to process step b) is purified in a biofilter and discharged into the environment.
Listringhaus Walter
Scholz Werner
Vollmer Friedel
Metallgesellschaft Aktiengesellschaft
Robic
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