水力搅拌加速沼气工程启动的研究(Ⅰ)—实验部分  

Study on Hydraulic Agitation to Accelerate the Start-up of Biogas ProjectⅠ:Experimental Part

作　　者：黄如一 蒋辉霞[3] 吴进[2] 胡艺[1] 何清燕 龙恩深 梅自力[2] 徐文勇[5] 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)

机构地区：[1]四川省农村能源办公室,成都610041 [2]农业部沼气科学研究所,农业农村部生物质发酵产品质量安全风险评估实验室(成都),成都610041 [3]四川省农业机械研究设计院,成都610066 [4]四川大学建筑与环境学院,成都610065 [5]农业农村部农业生态与资源保护总站,北京100045

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)。

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.

关 键 词：沼气 搅拌 启动 接种液 流场 

分 类 号：S216.4[农业科学—农业机械化工程] X703.1[农业科学—农业工程]