000			03235nam a2200373 4500
005			20260817162850.0
008			120399s1988 th r 0000|00eng d
035			_a.b10087667
099		9	_aAIT Thesis no. EV-88-25
100	1		_aMahmood, Talat
245	1	0	_aApplication of direct membrane separation to activated sludge process
260			_aBangkok : _bAsian Institute of Technology, _c1988
300			_a111 p.
490	1		_aThesis ; _vno. EV-88-25
500			_aA Thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1988
520			_aFeasibility of . hollow fiber microfiltration for solid liquid separation from the aeration tank of an activated sludge process was investigated. The study was divided into short term experiments and a long term experiment. From the short term experiments results. cyclic operation was found effective against inter' module clogginq and hence resulting in stable membrane flux. Out of three different organic loadings given in the long term experiment. 3 kg/Cm3. d) was found to be the critical one. concerning solid liquid separation. 2 kg/( m3. d) was the most suitable loading. Membrane permeate was free of turbidity, free of bacteria, completely nitrified, partially denitrified and very low in effluent COD concentration. The process operated at very high MLSS concentration without sludge wastage. Low values of kinetic coefficients (kd and Y) and F/M ratio were obtained showing little sludge production at steady state. 0. 45 æm membranes operated at '1ower suction pressures than 0.1 æm membranes. The · highest pressure requirement during, around 4 months of operational period was within 0. 5 m head of water employing O'. 45 æm membranes. This idea motivated the use of elevation difference as a · driving force for membrane separation, precluding the pump suction. The proposed system showed better quality of effluent with much lower HRT. and high enough organic 1oading, when compared with the extended aeration process, in context of sludge production.
650		0	_aSewage _xPurification _xActivated sludge process
700	1		_aYamamoto, K., _eChairperson
700	1		_aOrth, Hermann M., _eExamination Committee
700	1		_aVigneswaran, Saravanamuthu, _eExamination Committee
710	2		_aThe Royal Norwegian Government (Norade Scholarship), _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-88-25
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B18895
907			_a.b10087667 _bmnait _cx
902			_a240410
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909			_aBarcode : 30050004250881 _bCREATED : 1994-05-16 _cRECORD # : i10093096 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050003044608 _bCREATED : 1994-05-16 _cRECORD # : i10093102 _dLPATRON : 1012435 _eLCHKIN : 2000-02-28 _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 4 _jTOT RENEW : 0
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