Mesophilic and thermophilic activated sludge post treatment of anaerobic effluent. Sludge and wastewater characterisation using batch experiments.

Abstract:

:Anaerobic pretreated paper process water was characterized in terms of readily biodegradable, slowly biodegradable, very slowly biodegradable and inert wastewater fractions under mesophilic and thermophilic conditions. The anaerobic pretreated paper process water contained a relatively high amount of slowly biodegradable components and few easily biodegradable components as indicated by the ratio of short-term BOD over the BOD5. Wastewater readily biodegradable COD, determined as short-term BOD, was almost similar when measured under both temperature conditions. Fractions of slowly biodegradable COD and inert COD of the same wastewater were found to depend on the type of biomass involved in the test. Thermophilic aerobic biomass was not able to degrade the wastewater to the same extent as the mesophilic biomass resulting in higher apparent inert COD levels. Furthermore, wastewater colloidal COD did not flocculate under thermophilic conditions and was thus not removed from the liquid phase.

journal_name

Biodegradation

journal_title

Biodegradation

authors

Vogelaar JC,Klapwijk B,van Lier JB,Lettinga G

doi

10.1023/a:1021277305333

subject

Has Abstract

pub_date

2002-01-01 00:00:00

pages

261-71

issue

4

eissn

0923-9820

issn

1572-9729

journal_volume

13

pub_type

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