温度对红薯酒糟沼气发酵的影响  

Effect of temperature on anaerbic biogas fermentation by sweet potato lees

作　　者：李美群[1,2] 熊兴耀[3,4] 谭兴和[1,2] 周红丽[1,2] 邓洁红 苏小军[3,4] 李清明[1,2] 彭丹[1] 王丹[1,2] 

机构地区：[1]湖南农业大学食品科学技术学院 [2]湖南农业大学食品科学与生物技术湖南省重点实验室,湖南长沙410128 [3]湖南农业大学湖南省作物种质创新与资源利用重点实验室 [4]湖南农业大学园艺园林学院,湖南长沙410128

出　　处：《湖南农业大学学报（自然科学版）》2010年第2期233-236,共4页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：国家科技支撑计划项目(2007BAD41B03)

摘　　要：以红薯酒糟为原料,接种30%(体积比)活性污泥,在30、35、40、45℃等4个温度水平下,采用自制小型沼气发酵装置进行厌氧发酵试验,通过测定产气率和化学需氧量COD值,研究温度对红薯酒糟沼气发酵的影响.结果表明,30、35、40、45℃的产气率分别为70.94、24.42、49.70、74.19mL/g;COD的降低率分别为32.62%、18.53%、29.38%、34.83%;30、45℃的产气率、COD的降低率明显高于其他2组;45℃的发酵pH较好,35℃的pH在后期出现了弱酸化现象.Under the temperature of 30, 35, 40, 45 ℃, the anaerobic fermentation experiment was done in the self-made small methane fermentation installment by taking the sweet potato lees as raw material and inoculating 30%（V/V） activated sludge. The effect of temperature on anaerbic biogas fermentation by sweet potato lees was studied by measuring the gas production rate and COD values. It was indicated that the gas production rate was 70.94 mL/gTS（30 ℃）, 24.42 mL/g TS（35 ℃）, 49.70 mL/g TS（40 ℃）and 74.19 mL/g TS（45 ℃） and the COD reduction rate was 32.62%, 18.53%, 29.38%, 34.83% respectively. The gas production rate and COD reduction rate of the 30, 45 ℃ were obviously higher than the others. The pH values of 45 ℃ were on good condition, while the pH values of 35 ℃ had acidified phenomenon in the later period.

关 键 词：红薯酒糟 厌氧发酵 沼气 

分 类 号：TS261.9[轻工技术与工程—发酵工程]