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Treatability of 4-CP and 2,4-DCP using fed-batch and sequencing batch reactor (SBR) systems was investigated. Complete removal of 4-CP and 2,4-DCP up to the initial concentrations of 130 and 75 mg l−1, respectively, was achieved with fed-batch reactors. In order to investigate the effect of solid retention time (SRT) on the COD removal efficiency, the fed-batch reactors were operated at 8 and 15 d of SRT. It was observed that the COD removal efficiencies did not exhibit significant variations with SRT in the presence of 4-CP, whereas high fluctuations were observed in the case of 2,4-DCP, possibly due to the poor sludge settleability encountered. In SBR mode of operation, unlike fed-batch reactors, chlorophenols were introduced as a sole carbon and energy source and it was observed that complete removal of 4-CP and 2,4-DCP could be achieved in SBR receiving up to 547 and 157 mg l−1, respectively.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864702784247783

Publication date: January 1, 2002

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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