Field Testing of an Innovative Onsite Blackwater Treatment System for a Green School
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Abstract
An innovative onsite blackwater treatment system by integrating conventional septic tank (CST) and up-flow anaerobic reactor (UF) has been proposed as a sustainable option for the green school concept. This study demonstrated the functionality and performance, under actual conditions, of the innovative onsite blackwater treatment system at the green school in Bangkok, Thailand. Four pilot-testing units of the integrated CST and UF (CST+UF 1-4) system were installed at the green school (IPC Green International Preschool and Nursery, Ramkhamhaeng 21). During the 4-month operation, the integrated CST and UF system received blackwater from 4 public flush toilets (6-10 L water/flush), each with more than 60 users/day. The effluent COD and BOD5 concentrations of the integrated CST and UF system could be maintained at approximately 100 and 50 mg/L, respectively, and meeting the local discharge standard of Thailand. The integrated CST and UF system is considered to be an innovative onsite wastewater treatment technology for alleviating the environmental concerns associated with septic tank effluent.
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References
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