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.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
关键词
红薯酒糟
厌氧发酵
沼气
sweet potato lees
anaerobic fermentation
methane
