油脂降解及其对餐厨废水厌氧发酵性能影响

Analysis of Grease Degradation and Its Impact on the Anaerobic Digestion of Kitchen Wastewater

投稿时间：2012-11-23

DOI：

中文关键词: 油脂 餐厨废水 沼气 抑制 厌氧发酵

英文关键词: grease kitchen wastewater biogas inhibition anaerobic fermentation

基金项目:国家“十二五”科技支撑计划项目(2012BAC18B01-2);国家自然科学基金项目(NSFC21276114);江苏省科技支撑计划项目(BE2012615)

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中文摘要:

采用批次试验研究餐厨油脂厌氧发酵性能及其对餐厨废水发酵产气的影响。结果表明:在高温条件下,餐厨油脂的产气过程与Modified Gompertz方程拟合较好,其产气潜力在894 mL/g左右。油脂降解初期出现产气延滞,且浓度越高延滞期越长。油脂质量浓度为10.0 g/L时,油脂降解产气效果最佳。通过单位油脂的产气量确定油脂的半抑制浓度为11.6 g/L。餐厨油脂与餐厨废水混合发酵时,不仅使产气量增加了131%,甲烷平均体积分数从58.93%增加到64.06%,提高了8.7%。

英文摘要:

The fermentation performance of kitchen grease and the influence on the biogas production fr om kitchen wastewater were studied by batch experiment.The results showed that,the gas production process of kitchen grease can be fitted well with Modified Gompertz equation and the potential production of biogas was about 894 mL/g with temperature of 55 ℃.Lag periods were observed at the initial stage of grease degradation,and the lag time of each group was increased with its concentration.The optimum degradation of grease was at the concentration of 10.0 g/L.Hemiinhibitory concentration of grease was identified as 11.6 g/L.When the grease and kitchen wastewater were mixed,not only the gas production improved by 131%,but also the average methane content increased from 58.93% to 64.06%,8.7% raised compared to the single kitchen wastewater group.

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