温度及总固体浓度对粪秆混合发酵产气特性的影响  

Effect of total solid concentration and temperature on biogas yields of mixture of chicken manure and corn straw

作　　者：宋籽霖[1,2] 李轶冰[3,2] 杨改河[3,2] 秦佳佳[3,2] 任广鑫[3,2] 冯永忠[3,2] 

机构地区：[1]西北农林科技大学林学院,杨凌712100 [2]陕西省循环农业工程技术研究中心,杨凌712100 [3]西北农林科技大学农学院,杨凌712100

出　　处：《农业工程学报》2010年第7期260-265,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(30700482);陕西省自然科学基金(2009JM3004);陕西省"13115"重大科技专项(2009ZDKG-03);西北农林科技大学09年基本科研业务费青年项目(QN2009006)

摘　　要：为探索温度、发酵料液总固体浓度和产气量之间的关系,确定最佳发酵温度以及进料量,通过自行研究设计的可控性恒温发酵装置,以5℃为梯度在20～40℃温度范围内,设置以4%为梯度,质量分数为4%～20%的5个总固体浓度,以鸡粪和玉米秆2:1(干物质量比)混合物为发酵原料,以常温厌氧发酵池的底物为接种物,进行批量厌氧消化试验,研究不同总固体浓度的发酵原料在不同温度下的厌氧发酵效果。结果显示,各总固体浓度发酵料液的产气速率均随着发酵温度的升高而加快;随总固体浓度增大,发酵料液产沼气的最适温度范围也随之扩大;各总固体浓度发酵料液的干物质产气率在5个温度的平均值依次为料液总固体质量分数8%>20%>16%>12%>4%;鸡粪和玉米秆2:1混合原料厌氧发酵的理论最优总固体质量分数及发酵温度值分别为14.6%,32.8℃。可以看出,发酵料液浓度并不是越高越好,不同的温度有其最适的浓度或浓度范围。To determine optimal fermentation temperature and total solid concentration,as well as to explore the relationship among temperature,total solid concentration and biogas production,a simulation experiment using self-designed constant-temperature anaerobic fermentation equipment was conducted in indoor conditions.In this study,the mixture of chicken manure and corn straw at 2：1（dry matter quantity） was used as the digestion material and the substrate of constant temperature fermentation pool was used as the inoculation substances,aiming at studying the effects of different total solid concentration of digestion material at different temperatures on gas production.The temperature ranged from 20 to 40℃ with a gradient of 5℃ and total solid concentration increased from 4% to 20% with a gradient of 4%.Results indicated that biogas production rate of different total solid concentration increased with temperature.With the increase of total solid concentration,the range of optional temperature of digestion material widened.The sequence of mean cumulative biogas production at different temperatures was 8%20%16%12%4%.The theoretical value of optimal total solid concentration and temperature of chicken manure mixed corn straw（2：1） were 14.6% and 32.8 ℃.It can be concluded that biogas yields did not increase with the total solid concentration and different temperature has its optimal total solid concentration or the range of total solid concentration.

关 键 词：温度 浓度 厌氧发酵 沼气产量 

分 类 号：S216.4[农业科学—农业机械化工程]