000			03313nam a2200385 4500
005			20260817162231.0
008			th eng
035			_a.b11558805
099		9	_aAIT Thesis no.EV-96-02
100	1		_aAmatya, Prasanna Lal
245	1	0	_aAnaerobic treatment of tapioca starch industry wastewater by bench scale upflow anaerobic sludge blanket (UASB) reactor
260			_aBangkok : _bAsian Institute of Technology, _c1996
300			_a64 leaves + _e1 online resource
490	1		_aThesis ; _vno. EV-96-2
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, 1996
520			_aFeasibility of a 21.5-L bench scale upflow anaerobic sludge blanket (UASB) reactor at ambient temperature was investigated for the anaerobic treatment of starch industry wastewater. The reactor was seeded with sludge obtained from anaerobic pond treating the starch wastewater. The reactor startup lasted for about 6 weeks. The neutralized feed was initially diluted to about 2,000 - 3,000 mg/Land was fed at organic loading rate (OLR) upto 8 kg CODf/mr3/d. Low upflow velocities upto 0.24 m/hr were maintained and no recirculation was employed upto 25 days to initiate the wash out of lighter fraction of seed sludge. The feed concentration and OLR were increased in steps as soon as COD conversion was higher than 80%. By the end of the startup period, VF A concentration in effluent was less than 500 mg/L while gas production rate of 100 Lid was obtained. After successful startup, undiluted supernatant wastewater with COD concentration of 12,000 - 24,000 mg/L was fed into the reactor at OLR of 10 - 16 kg CODrlmr3 /d. The upflow velocity was increased upto 0.5 m/hr to facilitate effective mixing of sludge granules while recirculation ratio was maintained at 4: 1. COD conversion efficiencies more than 95% and gas productivity of 5-8 m3/mr3.d were obtained during the steady state operation. About 83 . 6% of COD removed was converted into methane. The VSS/TSS of sludge increased from 0.42 at the beginning reactor startup to 0.86 towards the end, while specific methanogenic activity improved from 0.03 at the beginning of reactor startup to 0.7 kgCH4-COD/kgVSS/d towards the end of the study.
650		0	_aFactory and trade waste _xPurification
700	1		_aAnnachhatre, Ajit P., _eChairperson
700	1		_aYang, Byung-Soo, _eExamination committee
700	1		_aKamei, Tasuku, _eExamination committee
710	2		_aDAAD, Germany, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-96-2
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B14738
907			_a.b11558805 _bmnait _cv
902			_a240329
998			_b0 _c970102 _dm _ea _fv _g0
945			_lmnait
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942			_c40
909			_aBarcode : 30050120110415 _bCREATED : 2014-07-03 _cRECORD # : i12769058 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050160078993 _bCREATED : 2016-05-23 _cRECORD # : i12985600 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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