摘要
发酵原料总固体含量(TS)为8%,以多粮型白酒酒糟和水稻秸秆不同比例混合废弃物发酵原料,研究了30℃下不同比例混合废弃物厌氧发酵产沼气的特性,分析了厌氧发酵过程中日产气量、累积产气量、p H值和挥发性脂肪酸质量浓度的变化。研究结果表明:(1)以单纯酒糟作为发酵原料厌氧发酵初期启动速度很快,第2天达到产气最高峰,然后产气量快速下降。(2)以酒糟和稻秆不同比例混合作为发酵原料,发酵天数明显长于单纯酒糟,并且混合发酵物中稻秆所占比例越高,其发酵天数也就越长。(3)在温度为30℃,总发酵原料TS含量为8%,多粮型白酒酒糟与水稻秸秆质量比为1∶2混合时,累积产气量最大(8 600 m L),p H值的降低幅度最小,抑制酸化效果最佳,产气效果最好。研究结果可为多粮型白酒酒糟和水稻秸秆混合厌氧发酵产沼气提供理论依据。
The content of total fermentation materials TS was 8%. The fermentation materials were made up of distiller＇s grains of multiple-grains and rice straw in different proportion. The daily biogas production,cumulative biogas production,p H value and VFA in the anaerobic fermentation process were analyzed under 30℃. The results showed that the gas production could start faster using distiller＇s grains alone and reached production peak on the second day of fermentation,but daily gas production declined rapidly after that day. Using the rice straw and distiller＇s grains as fermentation materials could reduce daily gas production and slow the startup time. In addition,rice straw could extend the fermentation time,in other words,distiller＇s grains could reduce the fermentation time. Furthermore,among all the groups,the cumulative gas yield in group with distiller＇s grains and rice straw of 1∶ 2 was the highest,which reached 8 600 m L,moreover,p H value reduction in this group was minimum and the restraint of acidification was the best. The results could provide evidence for characterization of biogas production of rice straw mixed with distiller＇s grains of multiple-grains in anaerobic fermentation.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2014年第12期15-19,共5页
Food and Fermentation Industries
基金
发酵资源与应用四川高校重点实验室项目(2012KFJ002)
宜宾学院博士启动金项目(2011B05)
关键词
多粮型白酒酒糟
稻秆
厌氧发酵
沼气
distiller＇s grains of multiple-grains
rice straw
anaerobic fermentation
biogas
