000			03310cas|a2200409 i 4500
005			20260819084530.0
008			170399s1991 th uzm rtt 00| a1eng d
035			_a.b10729446
099		9	_aAIT Thesis no. EV-91-20
100	1		_aChen, Ann-cheng
245	1	0	_aThermophilic treatment of high strength wastewater by modified Upflow Anaerobic Sludge Blanket reactor (U.A.S.B.)
260			_aBangkok : _bAsian Institute of Technology, _c1991
300			_a70 p.
490	1		_aThesis ; _vno. EV-91-20
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1991
520			_aThis study was aimed to cultivate thermophilic organisms which can perform optimally at 55°c, and to utilize their increased reaction rate at increased temperature. A semi-pilot modified U.A.S.B. reactor were operated at different organic loading of 2 to 24 Kg COD/m3.day corresponding to H.R.T.:12o hr to 10 hr and using distillery wastewater as feed substrate which was inherently at high temperature. Investigations on gas production rate, biogas composition, COD balance, sulfur balance, microbial and physico-chemical mechanism of granular sludge formation were made. It was determined that organic loading up to 24 Kg COD/m3.day could be handled with satisfactory efficiency. High methane production rate was linearly increasing correspondingly with increasing organic loading. Higher organic loading was still imposed continuously, that is, maximum organic loading was not obtained yet. It was found that limiting step of thermophilic U.A.S.B. reactor was propionate degradation. The interspecies hydrogen transfer in the system was very important factor for process performance. Based on COD balance, 68% of removal COD was converted to methane gas. Also it was found that sulfate reducing bacteria can not compete with methanogenic bacteria in the system. Both Methanosarcina-like and Methanothrix-like methanogens were coexisting in granular sludge.
650	1	0	_aSewage _xPurification _xActivated sludge process
700	1		_aHarada, Hideki, _eChairperson
700	1		_aTran, Francis T., _eExamination Committee
700	1		_aVerink, Johan, _eExamination Committee
710	2		_aChinese Taipei Government, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-91-20
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B17411
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