Methane Production by co-Digesting Crude Glycerol with Treated Palm Oil Mill Effluent
Crude glycerol is the major by-product of the biodiesel industry. In general, approximately 10 percents of crude glycerol are generated during biodiesel manufacturing process. Nevertheless, this glycerol is expensive to purify for use in food, pharmaceutical, or cosmetics industries, alternative methods for its disposal is urgently required. Applying crude glycerol as a carbon source for biogas production is a promising alternative use for this high-strength waste. Nevertheless, the relatively high COD:N ratio of the crude glycerol requires the addition of nutrients to the feedstock for biogas production. The aim of this study was to assess the effects of COD:N ratios in co-substrates of crude glycerol and treated palm oil mill effluent (as nitrogen source) on reactor performance and biogas production. The study was carried out by feeding a laboratory-scale continuously stirred tank reactor with mixtures of crude glycerol and treated palm oil mill effluent in various proportions. The results from batch experiments applied feedstock with COD:N ratios of 300:5 and 300:7 show that the profile of cumulative methane volume, specific methane yield and methane production efficiency were insignificantly different. While the COD:N ratio was decreased to 300:3, it has certain effects on both the reactor performance and the methane production.
crude glycerol palm oil mill effluent COD:N ratio biogas anaerobic digestion
Chaloemdech Nalampoon Chinnapong Wangnai
Department of Chemical Engineering Faculty of Engineering King Mongkuts University of Technology Th Pilot Plant Development and Training Institue King Mongkuts University of Technology Thonburi Bangk
国际会议
昆明
英文
145-147
2010-10-17（万方平台首次上网日期，不代表论文的发表时间）