Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7073704 | Bioresource Technology | 2015 | 37 Pages |
Abstract
A down-flow hanging sponge (DHS) reactor is a novel, unaerated, aerobic, biofilm reactor that is used to polish effluent received from an up-flow anaerobic sludge blanket (UASB) reactor for treating municipal sewage. A full-scale DHS reactor was constructed for post-treatment of a full-scale UASB reactor at a municipal sewage treatment plant in India. Performance of the DHS reactor was evaluated with respect to organic removal over 1800 days of continuous operation. The UASB + DHS system consistently produced effluent with chemical oxygen demand (COD), biochemical oxygen demand (BOD), and suspended solids (SS) values of 37, 6.0 and 19 mg Lâ1, on average, respectively. The sludge yield of the DHS reactor was estimated to be 0.04 kg SS kgâ1 COD removed or 0.12 kg SS kgâ1 BOD removed, which is considerably lower than other aerobic treatment methods that have been employed for polishing UASB effluent.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Tsutomu Okubo, Takashi Onodera, Shigeki Uemura, Takashi Yamaguchi, Akiyoshi Ohashi, Hideki Harada,