多底物共发酵产酸特性研究
边道林;孙磊;王爽;郭炜;王朋峰
【期刊名称】《黑龙江农业科学》 【年(卷),期】2014(000)009
【摘要】为探讨多种底物共发酵是否有利于定向产酸发酵，以牛粪、水稻秸秆、糖蜜废水为底物，分析了产酸相中不同时期pH、ORP、挥发性脂肪酸及秸秆纤维素含量的变化。结果表明：在反应器初期30d时，产酸菌群活性增长期，大量挥发性脂肪酸的产生使得pH迅速下降。反应后期60d，pH缓慢上升，为6．2～6．5，ORP值为-250～-400mV，满足产酸菌的生长条件。共发酵具有很强的碳源氮源互相补充的能力，有利于发酵的进行。反应120d时，水稻秸秆中纤维素得到有效降解。%In order to explore multi-substrate co-fermentation whether be conducive to acidogenic fermentation , taking cow dung ,rice straw and molasses wastewater as substrate ,the change of pH ,ORP ,volatile organic acid and cellulose content in straw during different period in acidogenic-phase were analyzed .The results showed that :in the first 30 days ,the activity of acid-producing bacteria increased fast ,production of volatile organic acid lead to pH decrease .In the later 60 days ,pH rose slowly and ranged from 6 .2 to 6 .5 ,ORP varied from -250 to -400 mV ,which met growth conditions of acid-producing bacteria .Co-fermentation had a strong ability to supplement carbon source and nitrogen source and was conducive to ferment .When ferment for 120 days ,cellu-lose in straw degraded
多底物共发酵产酸特性研究
