摘要
该研究利用人工搅拌大幅提高接种液的激活速度,从而加快沼气工程的启动过程,提高工程效率。采用平行实验方法,以3台653.5 L的厌氧发酵实验罐进行了投放接种物的启动实验,实验罐1#和4#分别采用底部进水高位集中压力出水(单口)和底部进水高位分散式压力出水(4口)的循环流化水力搅拌方案。42 d连续发酵显示,1#和4#分别比不搅拌的对照组0#罐早1 d和7 d启动,产气率分别提升89%和125%,COD去除率分别提升27%和42%。实验验证了水力搅拌在发酵启动阶段的加速作用,以及优化搅拌的进一步提升作用。
In this study,artificial agitation was used to increase the activation speed of inoculums,thus accelerating the start-up of biogas project and improving the engineering efficiency.By using parallel experiment method,inoculum fluid(the end effluent of a normal operating biogas plant)was added into three anaerobic fermentation tanks of 653.5 L for starting-up.The experimental tanks 1#adopted water inlet at the bottom with concentrated pressure outlet(single outlet)on the high position of the tank as a hydraulic agitation,and tank 4#also adopted water inlet at the bottom but dispersed pressure outlet(4 outlet)on high-position of the tank as a hydraulic agitating.42 days of continuous fermentation showed that 1#was started up 1 day earlier than the control group 0#,the biogas production increased by 89%,and the COD removal rate increased by 27%.Group 4#was started up 7 days earlier than the control,the biogas production increased by 125%,and the COD removal rate increased by 42%.The experimental results verified the acceleration effect of hydraulic agitation in the starting stage of fermentation and the further enhancement effect of optimized agitation.
作者
黄如一
蒋辉霞
吴进
胡艺
何清燕
龙恩深
梅自力
徐文勇
HUANG Ru-yi;JIANG Hui-xia;WU Jin;HU Yi;HE Qing-yan;LONG En-shen;MEI Zi-li;XU Wen-yong(Rural Energy Office of Sichuan Province, Chengdu 610041, China;Biogas Institute of Ministry of Agriculture, Risk Assessment Lab of the Quality Safety of Biomass Fermentation Products (Chengdu), Ministry of Agriculture and Rurals Affairs, Chengdu 610041, China;Sichuan Research and Design Institute of Agricultural Machinery;College of Architecture and Environment, Sichuan University, Chengdu 610065,China;Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China)
出处
《中国沼气》
2020年第4期45-50,共6页
China Biogas
基金
公益性行业(农业)科研专项(201303091)
中国农业科学院科技创新工程(CAAS-ASTIP-2016-BIOMA)
四川省重点研发计划(2020YFN0016)
“十三五”国家重点研发计划(2016YFD0501403)。
关键词
沼气
搅拌
启动
接种液
流场
biogas
agitation
start-up
inoculum
flow Pattern
