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020 _aTHE0003193(Local)
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_c201108030949
_dFida
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_dVLOAD
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_dida
_y201002031511
_zida
040 _aUMP
090 _aTD466 .I99 2009 rs Bc.
100 0 _aIzwan Abdul Rahman
245 1 0 _aZinc removal by natural microflora /
_cIzwan Abdul Rahman
246 3 _aZinc removal by natural microflora
_h[computer file]
260 _aKuantan, Pahang :
_bUMP,
_c2009
300 _a43 p. :
_bill. (some col.) ;
_c30 cm. +
_e1 computer disc
502 _aProject paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang - 2009
504 _aBibliography : p. 35-39
520 3 _aDifferent kinds of heavy metals exist in the solution with different forms, so their treatment methods are also different. As for the treatment of heavy metal wastewater, many methods have been put forward at home and abroad, including chemical-treatment method, ion-exchange method, electrolytic method, adsorption method, reverse-osmosis method, evaporating concentration and biological treatment. This study used biological treatment to degrade zinc from wastewater. Zinc removal by natural microflora was studied by using sequencing batch reactor(SBR). 5 reactors were used in this studies; 1 10L reactor for accclimatization and 4 5L reactors for treatment. 1 month was used to acclimatize the microflora. Treatment reactors were run for 2 weeks. Every treatment reactor was set to run at specific loading rate which were ranging from 5 mg/L.d to 3 mg/L.d. This study was run to study the effects of different loading rate on the zinc waste treatment, to study the effects of zinc concentration to the growth of microflora and to study the degradation of zinc by microflora in soil.During the run, about 48-88% of zinc and about 30-48% of COD were removed. Mathematical calculation by Design Expert predicted that LR5 gives the maximum value of removal with 39.83% COD removal and 80.81% zinc removal at 486.74 mg/L suspended solid. This study shows that higher LR rate gives higher value of zinc and COD removal but gives lower value of SS.-Author-
650 0 _aWater
_xPurification
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