摘要
以新鲜牛粪为原料,用自制的厌氧水解酸化系统研究了在高浓度两相厌氧发酵过程中,30℃和35℃时温度波动±2.5℃对挥发性脂肪酸产量和挥发性脂肪酸主要成分的影响。结果表明,温度波动对挥发性脂肪酸产量的影响因基础温度而异,在35℃时温度波动组的挥发性脂肪酸产量略高于恒温组,30℃时温度波动组的挥发性脂肪酸产量与恒温组基本持平,但总体趋势是温度波动组要好于恒温组。温度波动对乙酸含量基本没有影响,而对丙酸的含量有一定影响。所以在牛粪高浓度水解酸化过程中,可以在水解酸化相通过温度波动取得较好的厌氧水解酸化效果。
Experiment was conducted to investigate the effects of the range of temperature fluctuation from -2.5℃ to 2.5℃.at 30℃and 35℃, respectively, on the VFA productivity and VFA main ingredients in the process of high concentration two-phase anaerobic digestion. A self-manufactured anaerobic hydrolytic and acidogenic system was used to process the raw material of fresh cow manure in this research. A difference was found that the effect of the temperature fluctuation on the VFA productivity at different based temperatures. The VFA productivity of temperature fluctuation was a little higher than that of constant temperature under the temperature of 35℃, and it was almost the same under the temperature of 30℃. A whole trend of VFA productivity with temperature was observed that variable temperature was better than constant temperature. Except a certain influence for the propionic acid content, no significant difference was found that temperature fluctuation affected the acetic acid content. Therefore, the temperature fluctuation is helpful to obtain the preferable results for the hydrolysis and acidogenesis during the course of high-concentration anaerobic hydrolysis and acidogenesis of cow manure.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2007年第10期199-203,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金(50376009)
黑龙江省科技攻关项目(GC03A304)(GB06B502)(GB06B502)
国家十一五科技支撑项目(2006BAD07A10)
关键词
温度波动
高浓度水解酸化
挥发性脂肪酸
乙酸
丙酸
temperature fluctuation
high-concentration hydrolysis and acidogenesis
VFA
acetic acid
propionic acid
