03378cas|a2200253 i 450000500170000000800410001703500150005810000200007324501000009326000520019330000100024549000270025550001020028250200570038452023100044165000190275165000470277070000380281770000420285570000450289771000570294281000590299985600660305820260818094841.0170399s1992    th  u m rtt   0|  a1eng d  a.b102263701 aKim, Houng-seob10aEffect of a phenolic compound on the biodegradation kinetics of waste stabilization pond system  aBangkok :bAsian Institute of Technology,c1992  a87 p.1 aThesis ;vno. EV-92-06  aA thesis submitted in partial fulfillment of the requirement for  the degree of Master of science  aThesis (M.Sc.) - Asian Institute of Technology, 1992  aWaste stabilization ponds (WSP) may be affected by toxic compounds which  inhibit bacterial activity and reduce the rate of biodegradation of organic matter.  Research was conducted to evaluate the toxic effects of phenol in the laboratory-scale  and pilot-scale WSP.  The laboratory-scale WSP System I units, consisting of facultative pond l,  facultative pond 2 and maturation pond in series, were fed with different influent  phenol concent r ations of 300, 500, 600 and 700 mg/L, but the same organic loading  rate of 1000 kg COD/(ha.d) to the facultati ve pond 1. System II consisting of  facultative pond 2 and maturation pond in series were fed with t h e same waste  as System I, but the organic loading rate of 250 l<g COD/(ha.d) was applied to the  facultative pond 2.  Data from this study showed that soluble chemical oxygen demand (SCOD)  removal efficiencies in the WSP were found to decrease with increasing influent  phenol concentrations. At influent phenol concentrations of 300, 500, 600 and 700  mg/L in the facultative pond 1 of System I and facultative pond 2 of System II,  the SCOD removal efficiencies were 55, 40, 37 and 25 percent for the facultative  pond 1 of System I, and 80, 63, 58 and 55 percent for the facultative pond 2 of  System II, respectively. However in the facultative pond 2 and maturation pond of  System I and in the maturation of System II, the SCOD removal efficiencies were  not much affected by the influent phenol loadings.  Chlorophyll g concentrations were found to decrease with increasing influent  ph enol concentrations in the facultative pond 1 of System I and facultative pond  2 of System II. However, in the facu ltative pond 2 and maturation pond of System  I and maturation pond of System II, the toxic effect of phenol was not much evident.  Phenol shock loading of 500 mg/L, applied for one day to the pilot-scale WSP,  chlorophyll .a resulted in the decrease of the pilot-scale facultative pond 1 unit  while in the pilot-scale facultative pond 2 and maturation pond, the chlorophyll  £!: was not a ffected much.  Peak phenol concent1·ations in the pilot-scal e facultative pond 1 and facultative  pond 2 appeared about one day after shocl< loading, being 47 and 16 mg/L. No  phenol was found in the pilot-scale maturation pond effluent. 0aSewage lagoons 0aSewagexPurificationxBiological treatment0 aChongrak Polprasert,eChairperson1 aVerink, Johan,eExamination committee1 aBhattarai, Kiran,eExamination committee2 aGovernment of the Federal Republic of Germany(DAAD) 2 aAsian Institute of Technology.tThesis ;vno. EV-92-06  3Full-Textu http://203.159.5.9/ait-thesis/detail.php?q=B16556