African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 1071

Review

A simple anaerobic system for onsite treatment of domestic wastewater

Lohani S. P.
  • Lohani S. P.
  • Department of Mechanical Engineering, Kathmandu University, Nepal, Department of Environment Science and Engineering, Kathmandu University, Nepal POST BOX: 6250, Nepal.
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Chhetri A.
  • Chhetri A.
  • Department of Environment Science and Engineering, Kathmandu University, Nepal POST BOX: 6250, Nepal.
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Khanal S. N.
  • Khanal S. N.
  • Department of Environment Science and Engineering, Kathmandu University, Nepal POST BOX: 6250, Nepal.
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  •  Received: 15 December 2014
  •  Accepted: 06 March 2015
  •  Published: 30 April 2015

Abstract

The use of anaerobic process for domestic wastewater treatment would achieve lower carbon footprint as it eliminates aeration and generate methane. Among several anaerobic treatment processes, high rate anaerobic digesters receive great attention due to its high loading capacity and chemical oxygen demand removal rate. Up-flow anaerobic sludge blanket reactor (UASB) is getting wide acceptance among several anaerobic processes. However, its application is still limited to industrial wastewater treatment. There are some unresolved problems to be accepted it in developing countries with lower temperature conditions for domestic wastewater treatment. Several studies have been carried out for the performance of UASB reactor but there is still lack of updated information especially on the issue of low temperature domestic wastewater treatment. Considering the gravity of the issue, an attempt have been made to compile updated information so as to help engineers, researchers and practitioners in the selection of reactors and future prospects of research.
 
Key words: Wastewater, anaerobic, up-flow anaerobic sludge blanket reactor (UASB), carbon footprint.