EVALUATION AND SELECTION OF AN APPROPRIATE TAPIOCA PROCESSING WASTEWATER TREATMENT TECHNOLOGY FOR APPLICATION IN TAN CHAU DISTRICT, TAY NINH PROVINCE

Tóm tắt

Although tapioca processing has contributed substantially to economic development, it has also been a significant pollution source in Vietnam. Existing tapioca wastewater treatment technologies are diverse and, in many cases, unsustainable. Screening for a sustainable and appropriate treatment technology requires careful analysis of technical, economic, environmental and social factors. In this research a set of 4 primary and 21 secondary criteria has been developed for evaluation of tapioca wastewater treatment technologies. The order of importance is identified as technical criteria (weight value of 55%), economic criteria (25%), environmental criteria (13%) and social criteria (7%). Among the 21 secondary criteria, legal compliance and treatment efficiency are the most significant technical factors; investment cost, land requirement and institutional and political are the three most important economic, environmental and social factors, respectively. Applying the criteria to 3 typical wastewater treatment technologies in Tan Chau district of Tay Ninh province, the research has selected a highly appropriate technology for the local, which employs both biological and physico-chemical treatment. In the future, researches of this kind may need to include climate change mitigation and adaptation capacity of the technology in the criteria.