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Journal of Chemistry
Volume 2013 (2013), Article ID 437147, 6 pages
http://dx.doi.org/10.1155/2013/437147
Research Article

Performance of a Novel Decentralised Sewage Treatment Reactor

1College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China
2Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Gongshang University, Hangzhou Zhejiang 310018, China
3Suzhou Industrial Technology Research Institute of Zhejiang University, Suzhou, Jiangsu 215163, China
4China SINOMACH Heavy Industry Corporation, 16 Shunbei Road, Beijing 100102, China

Received 19 April 2013; Accepted 27 July 2013

Academic Editor: Athanasios Katsoyiannis

Copyright © 2013 Dong Sheng Shen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel decentralised sewage treatment reactor (DSTR) for treating domestic sewage in rural areas was designed and investigated. The reactor was started aerobically after inoculation with biomass; the amount of initial mixed liquid suspended solids was 1.5 g/L. Oxygen was supplied to the reactor and the dissolved oxygen concentration was maintained at 1.3 ± 0.2 mg/L. The pollutant removal performance was investigated, and the average removal efficiencies of total chemical oxygen demand (TCOD), , suspended solids, and turbidity were 76%, 77.15%, 84.17%, and 83.93%, respectively. The DSTR exhibited good performance compared with the traditional activated sludge (AS) reactor. The resistance to impact load of the DSTR was superior to that of the AS reactor during surface load experiments. During the 120 days of operation, no sludge bulking was observed. The DSTR effluent and TCOD levels were a little higher than those for the AS reactor, but the disparity was not major.