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Theun Hinboun Power Company Decentralized Wastewater Treatment Plant (DEWATS)

2010 - 2011 • Bremen Overseas Research and Development Association (BORDA)


To provide solutions for wastewater treatment for the operational staff camps, office and school of Theun Hinboun Power Company.


A wastewater treatment plant has already been in place. However the mechanical activated sludge system that was used between 1995 and 2009 was not working anymore, due to high costs as well as a lack of knowledge to operate the system and replace spare parts. Furthermore it was odorous during the treatment process and the effluent wastewater quality was not complying with the discharge standard. It was effected directly to the nearest office buildings, especially the clinic of the site camp.

In order to address the problem, the company requested support from BORDA to implemented the DEWATS to treat the wastewater from camps, offices and the school. The DEWATS treatment modules include the Settler, Anaerobic Baffled Reactor, Anaerobic Filter, Horizoltal Planted Gravel Filter and the Aerobic Pond and Ultra Violet purifer. In order to operate the treatment system, THPC assigned 3 staffs from the maintenance team to work on the DEWATS O&M. The team was trained in the beginning to disseminate information required. Regular schedules for O&M were made for cleaning the grease trap, the control box and the DEWATS plant (checking up solid waste in the anaerobic chambers and removing dried plant from planted gravel filter). Moreover, observing the UV monitor to ensure that it is working regularly and give trainings on how to change the UV bulb each year in theguarantee period for an optimized function of the system.


Image: Theun Hinboun Power Company Decentralized Wastewater Treatment Plant (DEWATS)

Countries of activity

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Further information

Implementing partner: Theun Hinboun Hydro Power Company (THPC)

Contact information

Bounchan Khamphilayvong
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Camps (emergency or longer term) Decentralised wastewater treatment (e.g. DEWATS) East Asia & Pacific Health and hygiene International NGO Operation, maintenance and sustainable services Other funding source or unspecified Politicians and local decision makers Practitioners Product design and engineering Schools Specific to one or several countries Treatment of faecal sludge Treatment of wastewater or greywater

Bremen Overseas Research and Development Association

BORDA e.V. (Bremen Overseas Research & Development Association) is a German non-governmental organisation, headquartered in Bremen with a network of local partner organisations in more than 20 countries worldwide. Since founded in 1977, BORDA is active in the fields of poverty alleviation, sustainable protection of natural resources and the develops, implements and disseminates decentralised sustainable technologies and social measures for water, wastewater, energy and waste. Currently BORDA is focusing on decentralized sanitation solutions for the poor in peri-urban and urban areas in Africa, Asia and Latin America. To increase access to improved sanitation, BORDA provides demand oriented service packages including decentralised wastewater management solutions (DEWATS) and decentralised solid waste management (DESWAM). BORDA has regional offices in Tanzania, India, Jordan, Indonesia and Mexico. BORDA is mainly supported by the Federal German Ministry for Economic Cooperation & Development (BMZ) and the Hanseatic City of Bremen.

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