接种比例对酒糟与餐厨垃圾混合厌氧发酵产沼气的影响  

INFLUENCE OF THE INOCULUM TO SUBSTRATE RATIO ON THE ANAEROBIC CO-DIGESTION OF DISTILLER'S GRAINS AND FOOD WASTE

作　　者：蔡玮玮[1] 张笑[1] 王利红[2] 汪群慧[1] 

机构地区：[1]北京科技大学环境工程系,北京100083 [2]邯郸职业技术学院建工系,河北邯郸056001

出　　处：《环境工程》2013年第2期99-103,131,共6页Environmental Engineering

基　　金：国家自然科学基金(51278050);国家国际科技合作专项(2013DFG92600);环保公益行业专项(201109024)

摘　　要：采用酒糟与餐厨垃圾作为混合发酵物料,并接种消化污泥进行厌氧干式发酵,比较接种比例(inoculum to substrate ratios,ISRs)(VS质量比)分别为0.5、0.8、1.0、2.0时的甲烷产率和产量、体系VFA、碱度、游离氨等指标。结果表明:接种比例的提高可有效提高甲烷产生速率,缩短发酵周期,减弱较高浓度VFA引起的抑制作用。当ISRs=1.0时产甲烷效果较好,累计产甲烷率为222.58mL/g,VS去除率达83.4%,继续增加接种比例对发酵效果影响不显著。此外,试验中适宜的VFA/碱度值为0.3～1.2,过大或过小都有可能抑制产甲烷过程。The method of anaerobic solid-state digestion was used to examine the effects of different ISRs （ inoculum to substrate ratios） on methane production, VFA concentration, alkalinity and free ammonia from distiller＇s grains and food waste at inoculum to substrate volatile solids ratios of 0. 5, 0.8, 1. 0, and 2.0 with activated sludge as inoeula. The results showed that the increasing 1SRs could effectively boost the production of methane, shorten fermentation period and alleviate inhibition effects caused by high VFA concentration. The highest accumulated methane yield was 222. 58mL/g at ISRs value of 1.0 with 83.4% removal rate of VS. Keeping increasing ISRs has no significant influence on fermentation results. In addition, appropriate VFA/alkalinity value has to be kept at 0. 3 ～ 1.2 in this experiment, otherwise methanogenesis process may be inhibited.

关 键 词：接种比例 酒糟 餐厨垃圾 甲烷 厌氧混合干式发酵 

分 类 号：X705[环境科学与工程—环境工程]