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005 20260818144356.0
008 140619s2012 th ad ||| |000 0 eng d
035 _a.b12134351
099 9 _aAIT Thesis no.EV-12-22
100 0 _aVo Thi Dao Chi
245 1 0 _aInvestigation of woven fiber membrane based low cost decentralized wastewater treatment system
260 _aPathum Thani :
_bAsian Institute of Technology,
_c2012
300 _a92 p. :
_bill., charts +
_e1 online resource
490 1 _aThesis ;
_vno. EV-12-22
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environment Engineering and Management
502 _aThesis (M.Sc.) - Asian Institute of Technology, 2012
520 _aWater 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.
650 0 _aSewage
_xPurification
_xAnaerobic treatment
650 0 _aSewage
_xManagement
650 0 _aSewage
_xPurification
700 1 _aVisvanathan, C.,
_eChairperson
700 0 _aThamamarat Koottatep,
_eExamination committee
700 0 _aVilas Nitivattananon,
_eExamination committee
710 2 _aIFP-Ford Foundation, USA,
_eScholarship donor
710 2 _aAsian Institute of Technology Fellowship,
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-12-22
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B02530
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_tAbstract--AIT Thesis no.EV-12-22
_vn
945 _lmnait
945 _lmnait
945 _lmnarc
942 _c20
942 _c40
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