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Waste stabilisation pond sewage treatment system : its appropriateness to a regional city of Thailand


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Inmuong, Yanyong 1993 , 'Waste stabilisation pond sewage treatment system : its appropriateness to a regional city of Thailand', Coursework Master thesis, University of Tasmania.

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An investigation of Khon Kaen WSP revealed that the WSP was more appropriate to the
Thai regional cities' situation in both sewage treatment objective and socio-economic
context. The WSP was capable of treating raw sewage meeting Thailand's effluent
standard in BOD, pH, total coliform and faecal coliform counts, except TSS. Sunlight, temperature, pH, phosphate, nitrate, retention time, pond geometry, pond
location towards the wind direction and removal of algal mats appeared to be major
factors influencing the biological pollutant degradation activities inside the ponds.
Offensive odour, as a main public complaint about the plant, resulted from the abundance
of floating algal mats.
Some conventional WSP design equations were found to be less effective in effluent
quality prediction compared with the actual pond performance. The result of the analysis
of some of the contemporarily designed BOD loading equations applied to this plant
showed that such equations were less appropriate to the Khon Kaen city environment.
The actual BOD loading-removal linear equation investigated from this existing plant
could be the best method for future WSP development in this region.
The plant, with low costs of construction, operation and maintenance, was found to be
cost-effective and suited to Khon Kaen city conditions. The plant required more
operators and the present workers need additional training and experiences. Supplying
the operators with equipment for removing algal mats appeared to reduce offensive
odours and increased pond performance. Due to TSS level in the final discharge being
over the country's standard, initiating any measure for decreasing TSS would be
necessary for this plant.

Item Type: Thesis - Coursework Master
Authors/Creators:Inmuong, Yanyong
Keywords: Sewage disposal, Sewage lagoons
Copyright Holders: The Author
Copyright Information:

Copyright 1993 the Author - The University is continuing to endeavour to trace the copyright
owner(s) and in the meantime this item has been reproduced here in good faith. We
would be pleased to hear from the copyright owner(s).

Additional Information:

Thesis (M.Env.St.)--University of Tasmania, 1994. Includes bibliographical references (p. 207-233)

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