Title PRE-ENGINEERED ( PACKAGE / AND OR ON-SITE ) WASTEWATER TREATMENT

PRE-ENGINEERED (PACKAGE/AND OR ON-SITE) W ASTEW ATER TREATMENT PLANTS Nguyen Hun Quyet, Vi Thi Thorn, Cao The Anh, Le Van Chieu, Cao The Ha, Vu Ngoc Duy, Truong Thi Mien, Vo Thi Thanh Tam, Tran Thi To Phuong Research Centre for Environmental Technology and Sustainable Development (CETASD), Hanoi University of Science, VNU-Hanoi T3 Building, 334 Nguyen Trai, Thanh Xl/an, Hanoi, Vietnam Package plants are getting more and more popularity not only in drinking water treatment, but also in wastewater treatment. There are some proccesses used to design such kind of facilities. They are extended aeration, contact stabilization, SBR, RBC, oxidation ditch, BMR, physico-chemical treatment etc. In this repoli two options for preingineered wastewater treatment plant were studied. It was revealed that plant based on principle of Japanese Jokaso using contact stabilization by biological submerged anaerobic and aerobic filters was well suited for on-site treatment of hospital or similar wastewaters.Although relatively high cost of investment, MBR is another promissing option with the best effluent's quality, that can be reused to reduce the treatment cost.