不同pH值对玉米废醪厌氧消化系统酸化恢复的影响  

Effects of Different pH Values on Acidification Recovery of Corn Waste Mash Anaerobic Digestion System

作　　者：杨乐 晏娅 陈雪梅 许国芹 赵兴玲[1] 梁承月 尹芳[1] 张无敌[1] YANG Le;YAN Ya;CHEN Xue-mei;XU Guo-qin;ZHAO Xing-lin;LIANG Cheng-yue;YIN Fang;ZHANG Wu-di(College of Energy and Environmental Science,Yunnan Normal University,Kunming 650500,China;Honghe University,Mengzi 661100,China)

机构地区：[1]云南师范大学能源与环境科学学院,云南昆明650500 [2]红河学院,云南蒙自661100

出　　处：《云南师范大学学报（自然科学版）》2021年第6期5-10,共6页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：国家自然科学基金资助项目(51366015);云南师范大学大学生科研训练基金资助项目(KX2020141);云南省应用基础研究计划资助项目(202001BA070001-111);云南省沼气工程技术研究中心基金资助项目.

摘　　要：在接种量为30%,TS浓度为6%,中温(32±1)℃条件下,探究了不同pH值对玉米废醪厌氧消化系统酸化恢复的影响.结果表明系统发生酸化的挥发性脂肪酸(VFAs)阈值为6000 mg/L,且主要积累成分为丁酸;pH5.5组丁酸降解不充分,pH8.5组丙酸占比偏高,发酵周期较短,均不利于酸化恢复.Under the conditions of 30%seed quantity,6%TS concentration and medium temperature(32±1)℃,the effects of different pH values on acidification recovery of anaerobic system of waste mash of corn were investigated.The results showed that the threshold value of volatile fatty acids(VFAs)was 6000 mg/L,and the main accumulation component was butyric acid.The degradation of butyric acid in pH5.5 group was insufficient,and the proportion of propionic acid in pH8.5 group was high,and the fermentation period was short,which were not conducive to acidification recovery.

关 键 词：玉米废醪 不同pH值影响 厌氧消化 酸化恢复 

分 类 号：S216[农业科学—农业机械化工程]