Abstract:Effect of output and reflux of hydrolysate on hydrolysis and acidification process of baling wheat straw were investigated by batch model at (37±1)℃. Ejected the hydrolysate from anaerobic system was good for the dissolving of organic matter of wheat straw. After hydrolysate ejection, more organic matter of wheat straw were dissolved into hydrolysate and content of COD and SCOD increased and pH value decreased rapidly while content of TVFAs increased in the initial stage and than decreased. More hydrolysate ejected from the anaerobic system was benefit for the dissolving of organic matter of wheat straw and amount of COD, total solid losing rate, hemi-cellulose losing rate and cellulose losing rate of the treatment of evacuation of hydrolysate were 44.45%, 25.97%,30.23% and 43.34% higher than that of the treatment of one third hydrolysate ejection. Amount of COD obtained from 1 gram wheat straw was up to 0.33g COD. There was no significantly improvement on the dissolving of organic matter of wheat straw by reflux of hydrolysate. However, daily biogas yield and methane content were increased obviously by reflux of hydrolysate at the end of the experiment. Cumulative biogas yield and methane content of the treatment of reflux hydrolysate once a day were higher than that of the treatment of reflux hydrolysate three times a day and without reflux.
陈广银, 吕利利, 常志州, 叶小梅, 徐跃定, 张建英. 水解液出料和回流对秸秆水解产酸的影响[J]. 中国环境科学, 2013, 33(11): 2006-2012.
CHEN Guang-Yin, 吕Li-Li , CHANG Zhi-Zhou, YE Xiao-Mei, XU Yue-Ding, ZHANG Jian-Ying. Effect of output and reflux of hydrolysate on hydrolysis and acidification process of agricultural straw. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(11): 2006-2012.