Authors: Fongsatitkul, P.¹; Wareham, D. G.²; Elefsiniotis, P.³

Source: Environmental Technology, Volume 29, Number 11, November 2008 , pp. 1257-1264(8)

Publisher: Taylor and Francis Ltd

Abstract:

This study investigated the ability of a sequencing batch reactor (SBR) system to treat four industrial wastewaters, namely, textile, landfill leachate, seafood and slaughterhouse effluents. The system employed three identical SBRs (10 l volume each) operating in parallel and each waste was treated one at a time. The operational variables examined included the length of the non-aerated period and the solids retention time (SRT). All four wastewaters experienced chemical oxyfen demand (COD) and total kjeldhal nitrogen (TKN) removals greater than 81%, while the TP removals were lower, ranging from 57 to 94%. The length of the non-aerated period appeared to have minimal effect on the SBR performance; however, increases in SRT reduced the percent TP removal for the textile and leachate wastes only. In addition, to investigate organic loading limits to the seafood SBR system, the COD was increased by three increments of 250 mg l-1 starting from a baseline concentration of 1100 mg l-1. This resulted in a reduction in both the TKN and TP removal at the higher concentrations. Finally, for the slaughterhouse wastewater, the COD:TKN ratio was tested at levels of 6:1, 8:1 and 9:1 with the result that only the TP removal was affected at the lowest ratio.

Keywords: Industrial wastewaters; carbon; nitrogen and phosphorus removal; sequencing batch reactors

Document Type: Research article

DOI: http://dx.doi.org/10.1080/09593330802308978

Affiliations: 1: Department of Sanitary Engineering, Mahidol University, Ratchathevee, Bangkok 10400, Thailand 2: Department of Civil and Natural Resources Engineering, University of Canterbury, Christchurch, New Zealand 3: Department of Civil and Environmental Engineering, University of Auckland, Auckland, New Zealand

Publication date: 2008-11-01

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