Effect of biogenic substrate concentration on chlorophenol degradation kinetics

Date

2006-09-01

Author

ŞAHİNKAYA, Erkan
Dilek, Filiz Bengü

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The effects of biogenic substrate (peptone) concentration on reactor performance, yield coefficient (Y) and degradation kinetics were evaluated in an instantaneously fed sequencing batch reactor (SBR) receiving a mixture of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP). High chemical oxygen demand (COD) removal efficiencies (90-95%) and complete removal of chlorophenols were observed even in the absence of peptone (i.e. chlorophenols served as sole carbon and energy sources). During the degradation of 4-CP, 5-chloro2-hydroxymuconic semialdehyde (CHMS, the meta cleavage product of 4-chlorocatechol) accumulated but was subsequently completely removed. 2,4-DCP competitively inhibited 4-CP degradation, as 4-CP degradation only commenced after complete removal of 2,4-DCP. It was concluded that decreasing peptone concentration did not affect chlorophenol degradation profiles in the reactor. The chlorophenol degradation kinetic studies suggest that competent biomass alone was responsible for chlorophenol degradation. Consequently, it was thought that competent biomass concentration was constant even though peptone concentration in the feed was varied, as competent biomass grows on chlorophenols only. Models developed using this assumption agreed well with experimental data, which also confirmed that a biogenic substrate has no impact on chlorophenol degradation profiles in an SBR with instantaneous feed. (c) 2006 Society of Chemical Industry.

Subject Keywords

Biotechnology, Fuel Technology, Inorganic Chemistry, Renewable Energy, Sustainability and the Environment, Organic Chemistry, Waste Management and Disposal, Pollution, General Chemical Engineering

URI

https://hdl.handle.net/11511/37980

Journal

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY

DOI

https://doi.org/10.1002/jctb.1557

Collections

Department of Environmental Engineering, Article

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Effect of biogenic substrate concentration on the performance of sequencing batch reactor treating 4 CP and 2 4 DCP mixtures ŞAHİNKAYA, ERKAN; Dilek, Filiz Bengü (Elsevier BV, 2006-03-01) Effect of a biogenic substrate (peptone) concentration on the performance of sequencing batch reactor (SBR) treating 220 mg/l 4-chlorophenol (4-CP) and 110 mg/l 2,4-dichlorophenol (2,4-DCP) mixtures was investigated. In this context, peptone concentration was gradually decreased from 300 mg/l to null in which chlorophenols were fed to the reactor as sole carbon and energy sources. By this way, the effect of peptone concentration on observed yield coefficient (Y), biomass concentration, chlorophenols and COD...
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Citation Formats

E. ŞAHİNKAYA and F. B. Dilek, “Effect of biogenic substrate concentration on chlorophenol degradation kinetics,” JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, pp. 1530–1539, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37980.