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Xenobiotic substrate reduces yield of activated sludge in a continuous flow system.

Abstract：

:The biomass yield of a continuous flow activated sludge system varied when the system treated influent containing different compositions of biogenic and xenobiotic substrates. Both the biogenic substrate and a test xenobiotic 2,4-dichlorophenoxyacetic acid (2,4-D) were degraded at steady-state activated sludge operations. The true yields, determined from steady-state activated sludge treatment performances, were at the maximum and the minimum when the activated sludge treated the influent of sole biogenic substrate and sole 2,4-D, respectively. The minimum yield was 56% of the maximum. Yield reduction between the maximum and the minimum was proportional to the concentration of 2,4-D in the influent. This trend of yield reduction suited a model that describes the metabolic uncoupling effect of 2,4-D on the sludge's degradation of the substrates. The model function variable was defined as the ratio of 2,4-D to biogenic COD concentrations in the influent.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Chong NM,Wang CH,Ho CH,Hwu CS

doi

10.1016/j.biortech.2010.12.037

subject

Has Abstract

pub_date

2011-03-01 00:00:00

pages

4069-75

issue

5

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(10)01999-1

journal_volume

102

pub_type

杂志文章

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