000			03455cas|a2200421 i 4500
005			20260817171428.0
008			170399s1992 th u m rtt 0| a1eng d
035			_a.b10114518
099		9	_aAIT Thesis no.EV-92-23
100	0		_aNoppadon Suksawad
245	1	0	_aBiodegradation of toxic petroleum waste with Airlift Biological Contractor (ABC)
260			_aBangkok : _bAsian Institute of Technology, _c1992
300			_a98 p.
490	1		_aThesis ; _vno. EV-92-23
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, 1992
520			_aA semi-pilot scale study was conducted to find the feasibility of airlift biocontactor which is a modified application of the waste activated sludge process.Gas liquid circulation between riser and downcomer pipe in deep shallow shape:the resulting high hydrostatic pressure to gether with very efficient mixing in the shaft provide extremely high oxygen transfer efficiencies.This performance ' I ' is required for refinery wastewater biodegradation . The airlift biocontactor unit was operated with contin uous feeding, hydraulic retention time at 24 and 10 hours was used for the first and second run(25 and 50 percent volume by volume of petroleum wastewater concentration which diluted with AIT domestic wastewater).For the third run,100 percent petroleum wasetwater concentration was fed at 24 ,10 and 6 hours of hydraulic retention time.In all these runs, the air flow rate for working air in the reactor was kept at 4 cfm. Organic loading was a less controllable factor. For all the runs ,it was found that the removal effi ciency of total chemical oxygen demand (TCOD) was above 85 percent,oil and phenol removal were above 90 percent and for ammonia nitrogen it was found above 97 percent.Performance of airlift biocontactor at 10 hours hydrualic retention time petroleum wastewater removal was the same as 24 hours hy draulic retention time , also petroleum concentration shows less effect on removal efficiency. -ii- The result show that this new technology can be applied effectively for petroleum wastewater treatment.
650		0	_aPetroleum waste
650		0	_aBiodegradation
700	1		_aTran, Francis T., _eChairperson
700	0		_aChongrak Polprasert, _eExamination Committee
700	1		_aZhuang, Ya-Hui, _eExamination committee
710	2		_aGovernment of Australia, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-92-23
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B16842
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909			_aBarcode : 30050003046827 _bCREATED : 1994-05-16 _cRECORD # : i10128323 _dLPATRON : 1014316 _eLCHKIN : 2004-01-16 _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 1 _jTOT RENEW : 0
909			_aBarcode : 30050003046835 _bCREATED : 1994-05-16 _cRECORD # : i10128335 _dLPATRON : 1016493 _eLCHKIN : 2003-02-28 _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 1 _jTOT RENEW : 0
909			_aBarcode : 30050160056064 _bCREATED : 2016-11-05 _cRECORD # : i12974845 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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