04457nam a2200457 a 4500 20260818144356.0 140619s2012 th ad ||| |000 0 eng d .b12134351 AIT Thesis no.EV-12-22 Vo Thi Dao Chi Investigation of woven fiber membrane based low cost decentralized wastewater treatment system Pathum Thani : Asian Institute of Technology, 2012 92 p. : ill., charts + 1 online resource Thesis ; no. EV-12-22 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environment Engineering and Management Thesis (M.Sc.) - Asian Institute of Technology, 2012 Water pollution becomes a burning issue in HCMC because a vast of untreated wastewater from domestic and industry is daily discharged into water body. Wastewater from a septic tank significantly contributes to the pollution of water resources, because its effluent does not meet the national technical regulation on domestic wastewater before it is discharged. At the same time, high exploitation rate of fresh water resources for domestic, industrial and service activities in HCMC have resulted in the degradation of surface water and ground water. Therefore, the reuse and recycle of reclaimed water is recommended as an alternative water resource to solve the water demand, also reduce the water pollution of Ho Chi Minh City in the future. A pilot scale study of Woven Fiber Microfiltration (WFMF) with pore size from 1 {u2013}3 om in form of flat sheets was applied in the last compartment of a septic tank to improve the quality of the effluent of the septic tank, but not modify the structure of the septic tank that was already built before. After conducting 3 experiments with 3 different fluxes such as 2, 4,and 6 L/m².h, flux of 4 L/m².h was suggested as a sustainable flux for the working of WFMF in an anaerobic condition in a septic tank. For 68 days with the presence of WFMF in the septic tank, the efficiency of COD removal was from 14% to 38%. SS removal efficiency was high with over 95%, and the concentration of SS of effluent was under 10 mg/L. However, nitrogen and phosphate removal efficiency was not effective in anaerobic condition, under 10%. The removal efficiency of coliform was from 68.18% to 99.62%. Organic compounds, suspended solids, and pathogens were significantly reduced in the effluent of the septic tank upgraded by WFMF. However, useful nutrients such as nitrogen and phosphorous were still high in the effluent. To minimize the environmental pollution and overcome the shortage of water exploitation in Ho Chi Minh City, Vietnam, treated effluent after disinfection was recommended for irrigation of parks, flower gardens, and grass golf in this city. Sewage Purification Anaerobic treatment Sewage Management Sewage Purification Visvanathan, C., Chairperson Thamamarat Koottatep, Examination committee Vilas Nitivattananon, Examination committee IFP-Ford Foundation, USA, Scholarship donor Asian Institute of Technology Fellowship, Scholarship donor Asian Institute of Technology. Thesis ; no. EV-12-22 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B02530 .b12134351 mnait j 240404 0 140619 m a j 0 000:001:PDF:b1213435:001583:0:0:0:0:0:0 Abstract--AIT Thesis no.EV-12-22 n mnait mnait mnarc 20 40 Barcode : 30050120735609 CREATED : 2014-06-24 RECORD # : i12816280 LPATRON : 1025395 LCHKIN : 2015-07-13 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 1 Barcode : 30050120735617 CREATED : 2014-06-24 RECORD # : i12816292 LPATRON : 1025395 LCHKIN : 2015-08-10 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 3 TOT RENEW : 3 Barcode : 30050160047840 CREATED : 2016-01-06 RECORD # : i13008584 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 64878 64878 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-12-22 30050120735609 2026-08-18 14:43:56 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-12-22 30050120735617 2026-08-18 14:43:56 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-12-22 30050160047840 2026-08-18 14:43:56 2026-08-18 40