Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4390935 | Ecological Engineering | 2009 | 7 Pages |
Abstract
Centralized wastewater treatment systems require sophisticated technologies and skilled manpower for their operation and maintenance (O&M). These systems have huge construction as well as O&M costs. Therefore, a Decentralized Wastewater Treatment System (DEWATS) rather than a centralized system might be especially beneficial in developing countries. A model for DEWATS is developed in Nepal with Anaerobic Baffled Reactor (ABR) and hybrid Constructed Wetland (CW). The DEWATS treats high-strength wastewater from 80 households (400 PE). This paper summarizes the performance of the DEWATS from July 2006 to August 2007 in the removal efficiencies of TSS, BOD5, COD, NH4-N, TP and FC. The ABR is very effective in the removal of organic pollutants and could achieve TSS removal up to 91%, BOD5 up to 78% and COD up to 77%. The average removal efficiencies of the DEWATS is 96% TSS, 90% BOD5, 90% COD, 70% NH4-N, 26% TP and 98% FC.
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Authors
Shirish Singh, Raimund Haberl, Otto Moog, Roshan Raj Shrestha, Prajwal Shrestha, Rajendra Shrestha,