02661nam a2200253   450000500170000000800410001703500150005810000250007324501080009826000520020630000100025849000270026850001570029550200580045252014930051065000250200365000280202870000460205670000450210270000500214771000860219781000590228385600650234220260819085216.0120399s1989    th      r    0000|00eng d  a.b107436010 aUdomphon Puetpaiboon10aTreatment of tapioca starch wastewater by anaerobic digestion combined with membrane separation process  aBangkok :bAsian Institute of Technology,c1989  a59 p.1 aThesis ;vno. EV-89-22  aA thesis submitted in partial fulfillment of the requirements  for the degree of Master of Engineering, School of Environment, Resources and Development  aThesis (M.Eng.) - Asian Institute of Technology, 1989  aFeasibility study of using UF membrane alone to treat t apioca  starch wastewater and effluent from anaerobic filter as post-treatment were  conducted. The results obtained show that in t erms of COD removal efficiency  and filtrate rate, treatment of tapioca starch wastewater using UF membrane  alone is impractical and post-treatment of effluent of this wastewater from  anaerobic filt er is possible.  Furthermore, the study of treatment of synthetic starch wastewater  using anaerobic digester coupled with hollow fiber ultraf iltration membrane  for solid/liquid separation was investigated . The study was conducted with  different pore sizes of membrane of . 03, . 05, .10 and .15 æm. From the study  using organic loading rate of 1.76 kg COD/m3 ·d, gives t he similar results in  terms of COD removal and biogas production. Thus the study were conducted  with different organic loading rates of 2. 51, 3.53, 5.88, 8.83 and 11.77 kg  COD/m3 ·d respectively. Th~ system. was capable of achieving 81.1 percent COD  removal at an organic loading rate of 11 . 77 kg COD/m3 ·d and up to 92.2  percent COD removal at an organic l oading rate of 1.76 kg COD/m3 ·d. Maximum  gas yield of 0.74 m3 /kg COD utilized was obtained at 92 .2 percent COD  removal . The stable operation was kept over an operational period of 3  months at an average net flux of 1.85 * 10- 7 m3 /(m2 ·s). The key factors for  the stable operation are low transmembrane pressure and intermittent  filtration.10aSewagexPurification10aFactory and trade waste1 aVigneswaran, Saravanamuthu, eChairperson1 aYamamoto, Kazuo, eExamination Committee0 aKeiengsak Udomsinrot, eExamination Committee2 aDanish International Development Agency,  (DANIDA), Denmark., eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. EV-89-22  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B18021