Title: Removal of organic pollutants at different HRT in a submerged membrane bioreactor
Abstract: In order to investigate the influence of hydraulic retention time (HRT) on the organic pollutants removal in the submerged membrane bioreactor (SMBR),a lab-scale experiment was conducted using domestic sewage as influent. The dissolved oxygen (DO)concentration was controlled at 2-3 mg·L-1 during all the experimental period. The experimental results demonstrated that when HRT was at 3 ,2 and 1 h ,the removal rates of COD were 89.3%-97.2%,88.5%-97.3% and 80%-91.1%,and the effluent COD were 38.9-11.2, 41.6-10.8 and 63.4-35.8 mg·L-1,respectively. The authors suggested that HRT of 1 h could meet the normal standard of discharged domestic sewage,and HRT of 2 h could meet that of water reclamation. In addition,the effect of activated sludge concentration (MLSS) on COD removal was also investigated. It was showed that the optimum MLSS was better controlled at around 6 000 mg·L-1 in SMBR.
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
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