02355cas|a2200253 i 450000500170000000800410001703500150005810000250007324500910009826000520018930000100024149000270025150001060027850200580038452012940044265000190173665000410175570000380179670000420183470000420187671000580191881000590197685600660203520260819085213.0170399s1992    th  u m rtt   0|  a1eng d  a.b107434670 aSaranpong Sookhakich10aTreatment of phenolic wastewater in Attached-Growth Waste Stabilization Ponds ( AGWSP)  aBangkok :bAsian Institute of Technology,c1992  a66 p.1 aThesis ;vno. EV-92-22  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering  aThesis (M.Eng.) - Asian Institute of Technology, 1992  aLaboratory-s cale and pilot-scale study was conducted to evaluate the  efficiencies of AGWSP (Attache d-growth waste stabilization ponds) in  treating a phenolic wastewate r. Experimental results obtained i n the  l aboratory-scale units r eveal ed that the AGWSP fed with influent phenol  concentrations of 500-2000 mg/L had their SCOD and phenol r emoval  e ffi c i encie s decreased wi th increas ing phenol concentration. At the  influent phenol concentration of 500 mg/L, corresponding to the organic  loading r a t e (OLR) of 180 kgCOD/(ha . d), the SCOD and phenol removal  e ffi ciencies were 94. 2 and 99. 7%, respectively. At the influent phenol  concentrations of 1000 , 1500 and 2000 mg/L (corresponding to OLR of 360 ,  540 and 720 kgCOD/(ha . d)), the SCOD and phenol removal efficiencies were  50.8 and 50.5, 45.4 and 45.5, and 27.9 and 28 . 0%, respectively. The  pilot-scal e AGWSP s hock-loaded with 500 mg/L of phenol could recover to  i ts norma l pe r fo rmance in wit hin 13 days a fter the phenol dos age .  The AGWSP uni ts we re observed to have excessive bi of ilm growth on  the a ttac hed-growt h media after about 2 month of operation . The attac hed gr owth media s hould be c l eaned pe riodically to ensure maximum treatment  efficiency of the AGWSP units .10aSewage lagoons10aSewagexPurificationxPhenol removal0 aChongrak Polprasert,eChairperson1 aTran, Francis,eExamination committee1 aTanaka, Shuzo,eExamination committee2 aThe Government of Federal Republic of  Germany (DAAD)2 aAsian Institute of Technology.tThesis ;vno. EV-92-22  3Full-Textu http://203.159.5.9/ait-thesis/detail.php?q=B16841