摘要
为提高蔬菜废弃物发酵系统效率并促进其在高有机负荷条件下稳定运行,在高温(55℃)条件下进行蔬菜废弃物连续式厌氧发酵试验,筛选了厌氧发酵系统的失稳预警指标。结果表明:碳酸氢盐碱度(BA)失稳预警性能最强,可提前23 d预警,当BA<1500 mg/L时,系统出现失稳迹象;乙酸及正丁酸分别提前22 d、21 d预警;甲烷/二氧化碳(CH_(4)/CO_(2))可以提前21 d预警,当CH_(4)/CO_(2)<1.23时,系统出现酸化;总挥发酸/碳酸氢盐碱度(VFA/BA)、碳酸氢盐碱度/总碱度(BA/TA)、挥发酸盐碱度/碳酸氢盐碱度(IA/BA)均可以提前16 d预警,其预警临界值分别为VFA/BA>1.8、BA/TA<0.5、IA/BA>1.2;pH和氧化还原电位(ORP)的预警性较差,预警天数不足10 d。
In order to improve the efficiency of a vegetable waste fermentation system and promote its stable operation under high organic load,the continuous anaerobic fermentation experiment of vegetable waste was carried out under the high temperature of 55℃.The indexes of early warning for instability of the anaerobic fermentation system were determined.The results showed that the instability early warning performance of bicarbonate alkalinity(BA)was strongest,and its early warning could be given23 days in advance.When the concentration of BA was less than 1500 mg/L,the system showed signs of instability.The early warning of acetic acid and n-butyric acid was given 22 days and 21 days in advance,respectively.CH_(4)/CO_(2)could give early warning 21 days in advance.When CH_(4)/CO_(2)<1.23,acidification appeared in the system.The total volatile fatty acid/bicarbonate alkalinity(VFA/BA),bicarbonate alkalinity/total alkalinity(BA/TA)and intermediate alkalinity/bicarbonate alkalinity(IA/BA)could give early warning 16 days in advance.The critical values of early warning were VFA/BA>1.8,BA/TA<0.5,and IA/BA>1.2,respectively.The early warning performance of p H and oxidation reduction potential(ORP)was poor,and their warning days were less than 10 days.
作者
万志刚
黄召亮
乔杰
张俊
敖天杰
李东
WAN Zhigang;HUANG Zhaoliang;QIAO Jie;ZHANG Jun;AO Tianjie;LI Dong(Dongfang Electric Machinery Co.,Ltd.,Deyang 618000,China;Deyang Solid Waste Services Co.,Ltd.,Deyang 618000,China;Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China)
出处
《能源环境保护》
2021年第4期27-33,共7页
Energy Environmental Protection
基金
四川省科技成果转移转化示范项目(2021ZHZY0016、2020ZHZY0008)。
关键词
蔬菜废弃物
高温厌氧消化
失稳预警
Vegetable waste
Thermophilic anaerobic digestion
Early warning for instability
