Effect of biogenic substrate concentration on 4-chlorophenol degradation kinetics in sequencing batch reactors with instantaneous feed

Journal of Hazardous Materials
Erkan Sahinkaya, Filiz B Dilek

Abstract

Two sequencing batch reactors (SBRs) instantaneously fed with 200 mg/l 4-chlorophenol (4-CP) were operated at different feed peptone concentrations to investigate the effect of biogenic substrate (peptone) concentrations on reactor performance, yield coefficient (Y) and 4-CP degradation kinetics. One of the reactors was operated at 10 days of sludge retention time (SRT) and the other was operated at 20 days of SRT. High chemical oxygen demand (COD) removal efficiencies (90-95%) and complete 4-CP removals (detection limit was 0.05 mg/l) were observed even in the absence of peptone. Accumulation of 5-chloro-2-hydroxymuconic semialdehyde (CHMS), meta cleavage product of 4-CP, was observed, which was completely removed at the end of the reactor cycle. It was concluded that decreasing peptone concentrations did not affect 4-CP degradation profiles and Haldane equation can be satisfactorily used to predict time course variation of 4-CP concentrations. It was assumed that specialists (competent biomass) are only responsible for 4-CP degradation and its concentration was constant although peptone concentration in the feed was varied, as competent biomass grows on 4-CP only. Model developed using this assumption well tracked the experim...Continue Reading

References

Jul 12, 2002·Applied Microbiology and Biotechnology·E Sahinkaya, F B Dilek
Aug 12, 2003·Water Research·M Concetta TomeiAlessandro Senia
Jul 13, 2005·Bioresource Technology·Meenal Kulkarni, Ambalal Chaudhari
Dec 19, 2008·Water Science and Technology : a Journal of the International Association on Water Pollution Research·D KiK Yoo

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Citations

Oct 3, 2012·Journal of Bioscience and Bioengineering·Naresh Kumar SahooKannan Pakshirajan
Dec 30, 2008·Journal of Hazardous Materials·Alessandra CarucciMartina Piredda
Jan 15, 2008·Ecotoxicology and Environmental Safety·Erkan Sahinkaya, Filiz B Dilek
Mar 21, 2007·Journal of Hazardous Materials·Ayla Uysal, Aysen Turkman
Jun 20, 2016·Journal of Hazardous Materials·M Concetta TomeiAndrew J Daugulis
Jan 1, 2016·3 Biotech·Bhishma P Patel, Arvind Kumar

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