02312cas|a2200241 i 450000500170000000800410001703500150005810000240007324500990009726000520019630000110024849000270025950001060028650200580039252012700045065000510172070000330177170000420180470000480184670000510189481000590194585600660200420260818153803.0170399s1992    th  u m rtt   0|  a1eng d  a.b104101441 aSingh, Kripa Shanka10aLow strength (domestic) wastewater treatment by Upflow Anaerobic Sludge Blanket (UASB) reactor  aBangkok :bAsian Institute of Technology,c1992  a110 p.1 aThesis ;vno. EV-92-13  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering  aThesis (M.Eng.) - Asian Institute of Technology, 1992  aThe feasibility of anaerobic treatment for low strength domestic wastewater  was investigated using a semi-pilot scale UASB reactor of 126 l volume and  4 m height. This experiment was a continuation of the previous experiment  conducted by Lalit Agrawal and H. Harada. The domestic digested sludge was  used as seeding. The results reveals that an anaerobic treatment such as  UASB is effective in treating domestic wastewater and is able to maintain a  large amount active microorganism and effective removal of TSS. The duration  of the present experiment was about 7 months.  About 92% .COD reduction can be achieved under ambient temperature with  a HRT of 3 hr and organic loading of 4 kg-COD/m3 - d. The average methane  production was 141 Nl/kg-COD removed. This process also gave a high  removal efficiency of COD(about 90 %) for lower strength of 300 mg-COD/L  According· to the results obtained, the anaerobic treatment of domestic  wastewater appears to be an attractive proposition for tropical countries.  A morphology of sludge was examined by Scanning Electron Microscopy and  Transmission Electron Microscopy. The granular sludge contained diverse  groups of microorganisms whereas rod- type Methanothrix-like cells prevailed  inside the granules. 0aSewagexPurificationxActivated sludge process1 aHarada, Hideki,eChairperson1 aFujii, Shigeo,eExamination committee0 aChongrak Polprasert,eExamination Committee1 aBhattarai, Kiran Kumar,eExamination committee2 aAsian Institute of Technology.tThesis ;vno. EV-92-13  3Full-Textu http://203.159.5.9/ait-thesis/detail.php?q=B16644