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008 230399s1993 th uzm rtt 00| a1eng d
035 _a.b10229838
099 9 _aAIT Thesis no.EV-93-20
100 0 _aOuyang Ming
245 1 0 _aEffects of anaerobic conditions on biological phosphorus removal and sludge settleability
260 _aBangkok :
_bAsian Institute of Technology,
_c1993
300 _a88 leaves +
_e1 online resource
490 1 _aThesis ;
_vno. EV-93-20
500 _aA thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1993
520 _aThe effects of anaerobic conditions on biological phosphorus removal and sludge settleability in anaerobic aerobic activated sludge process have been studied by both continuous flow and batch experiments. In the continuous flow experiments, ten systems with different anaerobic configurations and various anaerobic retention time were operated. It has been observed that the growth of some filamentous organisms was suppressed under three-compartment anaerobic cascades as results of more soluble COD reduction and substrate gradient in anaerobic zone. The systems with anaerobic cascades also showed good phosphorus removal. It has been observed that anaerobic retention time should long enough to reduce soluble COD to penetrate aerobic zone. Longer anaerobic retention time such as 3 and 5 hours resulted in better phosphorus removal. In those systems without anaerobic cascade, severe filamentous bulking took place, even though the anaerobic retention time were similar to those of cascade systems. In the batch experiment, effects of anaerobic retention time on phosphorus removal was confirmed, suitable anaerobic retention time could achieve a better performance of phosphorus removal.
650 0 _aSewage
_xPurification
_xPhosphate removal
700 1 _aLee, Seong-Key,
_eChairperson
700 0 _aSamorn Muttamara,
_eExamination Committee
700 1 _aTanaka, Shuzo,
_eExamination committee
710 2 _aRoyal Government of Denmark,
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-93-20
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B16230
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