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Baffled septic tank with anaerobic filter (BASTAF) and vertical subsurface flow costructed wetland for domestic wastewater treatment in Vietnam.
Hanoi University of Civil Engineering.
Swiss Federal Institute of Aquatic Science and Technology.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Ekologi. Linköpings universitet, Tekniska högskolan.ORCID-id: 0000-0002-0722-6083
2010 (engelsk)Inngår i: Water Practice & Technology, ISSN 1751-231X, Vol. 5, nr 4Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The decentralized wastewater management utilizing existing infrastructure and low-cost natural treatment processes has a large potential in Vietnam. Centralized wastewater collection and treatment systems are often not affordable. Currently the septic tank is the most common on-site wastewater treatment facility in Vietnam. Nevertheless it has a limited treatment performance. The Improved Septic Tank, also known as Baffled Septic Tank with or without Anaerobic Filter (BASTAF or BAST) represents a valuable and promising alternative to the conventional septic tank. Results of laboratory- and pilot-scale research on BAST and BASTAF systems show that at a hydraulic retention time (HRT) of 2 days the 3-chamber BAST followed by Anaerobic Filter significantly increased the removal efficiencies in terms of BOD, COD and TSS in comparison with a conventional septic tank of the same size. Average treatment efficiencies of 80–90% in terms of BOD, COD and TSS can be achieved. Another component of the study showed that post-treatment of BASTAF effluent in a 2-stage vertical flow constructed wetland (CW) planted with locally available macrophytes allowed the achievement of level A, Vietnamese standard for wastewater discharge in terms of COD, BOD5, TSS, TN, NH4-N and T-P. Results of this study are now being implemented in different provinces inVietnam.

sted, utgiver, år, opplag, sider
IWA Publishing , 2010. Vol. 5, nr 4
Emneord [en]
Anaerobic filter; baffled septic tank; constructed wetland; Vietnam; wastewater
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-64431DOI: 10.2166/wpt.2010.100OAI: oai:DiVA.org:liu-64431DiVA, id: diva2:391049
Tilgjengelig fra: 2011-01-24 Laget: 2011-01-24 Sist oppdatert: 2018-03-13bibliografisk kontrollert

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