title: Pilot-testing an alternative on-site wastewater treatment system for small communities and its automatic control.
abstract: The pilot test of a new alternative for small wastewater treatment system has been conducted for two years. It consists of a hybrid bioreactor and the expert system including the programmable logic controller and human-machine interface. In order to monitor its status, the real-time data was transferred from the remote station to the central station via a wireless local area network. More efficient and stable performances were observed at automatic operating mode compared with the manual. On an average, COD, SS, T-N and T-P concentrations in the effluent from the hybrid bioreactor were less than 14, 7, 12 and 0.9 mg/L, respectively. According to the result from laboratory experiments, the quality of treated wastewater with chemical coagulation process followed by sand filtration was enough to be utilized again if a final disinfection step is included.
authors.affiliation: Water Environment & Remediation Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea. swhong@kist.re.kr
authors.forename: S W
authors.initials: SW
authors.lastname: Hong
authors.forename: Y S
authors.initials: YS
authors.lastname: Choi
authors.forename: S J
authors.initials: SJ
authors.lastname: Kim
authors.forename: G
authors.initials: G
authors.lastname: Kwon
mesh_terms: D001331:Automation; D019149:Bioreactors; D004784:Environmental Monitoring / Q000379:methods; D005374:Filtration; D012822:Silicon Dioxide; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D014867:Water; D012822:Silicon Dioxide