Biodegradability of filtrate from thermally hydrolysed waste activated sludge: PRESENTATION ONLY

Proceedings

Biodegradability of filtrate from thermally hydrolysed waste activated sludge: PRESENTATION ONLY

Toutian, V.1,2*, Barjenbruch, M.1, Unger, T.1, Loderer, C.2, Remy, C.2, 1Technical University of Berlin, Germany, 2Berlin Centre of Competence for Water, Germany
(free)

Key Theme:

Treatment processes for sewage sludges and other organic residuals

Summary:

High temperature thermal hydrolysis of thickened waste activated sludge in temperature ranges of 130-170°C was carried out to investigate its effect on the enhancement of the biomethane production during the mesophilic anaerobic digestion. The ultimate aerobic biodegradability test of filtrate was afterwards performed through the standardized Zahn-Wellens test to clarify the effect of hydrolysis temperature on the formation of non-biodegradable organic compounds which eventually lead to an increase in the effluent load of the WWTP.

Keywords:

Waste Activated Sludge; Thermal Hydrolysis; Anaerobic Digestion; Zahn-Wellens Test.

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Proceedings