Lin, Kuo-ching creator Shin, Hang-Sik Chairperson Hanaki, K. Examination Committee Vigneswaran, Saravanamuthu Examination Committee The Government of R.O.C Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1987 continuing eng 66 p. This study aimed to assess the feasibility of using mixed substrate to enhance biogas generation from Upflow Anaerobic Sludge Blanket CUASB> process . Three 8 . 5 L-UASB reactors were fed with different mixture ratios of chicken manure and brewery wastewater. Initially the process started up at an organic loading rate of 0.62 kg COO/m3 .d. and at a hydraulic retention time of 48 hr at 35° c. Organic loading rate was increased up to 6.3 kg CO O/m3 .d 8 weeks after t he star t - up with improve d performance . COO removal efficiency reached up to 90 %. Daily gas production started slowly and picked up rapidly at the later stage . At final stage, approximately 9 L of total gas could be produced daily a nd the average gas production rate was 180 L/kg COO added. It was found that the best results were obtained with the digester fed with the mixture of 25 % poultry manure a nd 75 % brewery wastewater at the organic loading rate of 3.1 1 kg COO/m3 .d a nd 24- hr hydraulic retention time. The gas yield was 247 L/kg COO add ed. The methane content of the biogas from t he waste varied from 66 to 73 %. Efficiency of methane generation was 40 % of the maximum potential. A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M. Eng.) - Asian Institute of Technology, 1987 Sewage Purification Biological treatment Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B19248 http://203.159.5.9/ait-thesis/detail.php?q=B19248 951014 20260818100053.0