微生物菌剂处理不同浓度沼液效果  

Effects of microbial agents on treating liquid digestate with different concentrations

作　　者：娄雨 李艳[1,2] 姜灵伟 李明新 王琦璋 马继涛 林聪 段娜[1,2] LOU Yu;LI Yan;JIANG Lingwei;LI Mingxin;WANG Qizhang;MA Jitao;LIN Cong;DUAN Na(College of Water Resources&Civil Engineering,China Agricultural University,Beijing 100083,China;Key Laboratory of Agricultural Engineering in Structure and Environment of MOARA,Beijing 100083,China;Sanhe Yingsheng Bioenergy Technology Co.Ltd.,Langfang 065000,China)

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]农业农村部设施农业工程重点实验室,北京100083 [3]三河市盈盛生物能源科技股份有限公司,河北廊坊065000

出　　处：《食品与发酵工业》2023年第9期135-141,共7页Food and Fermentation Industries

基　　金：国家自然科学基金项目(51861125103);国家重点研发计划项目(2018YFD0800803)。

摘　　要：随着沼气工程的发展,沼液处理利用已成为沼气工程可持续发展的瓶颈问题。该文探究了不同微生物菌剂处理方法对不同化学需氧量(chemical oxygen demand,COD)浓度沼液的处理效果。实验结果表明,经过微生物菌剂处理后的沼液感官和理化性质发生明显的变化。低浓度沼液(COD质量浓度为500~2000 mg/L)采用沼液与微生物菌剂一次性投加的方式处理后,沼液有机物和颗粒物大大减少,pH由碱性变为酸性,最大COD去除率为67.6%。高浓度沼液(COD质量浓度为5000~30000 mg/L)采用微生物菌剂一次投加和沼液连续投加的方式处理后,沼液pH变为弱酸性,有机物和悬浮物含量有所下降,但整体变化没有低浓度沼液处理组明显。针对不同浓度的沼液,可采用不同的微生物菌剂处理方法,实现相当的净化效果,可为沼液处理利用提供参考。With the development of biogas plant,the treatment and utilization of liquid digestate has become the bottleneck for sustainable development of biogas plant.In this study,microbial agents by different methods were adopted to explore the treatment effect on liquid digestate with different chemical oxygen demand(COD)concentrations.The results showed that the sensory and physicochemical properties of liquid digestate changed significantly by adding microbial agents.For the low concentration liquid digestate(COD of 500-2000 mg/L),liquid digestate and microbial agents was added at the same time,the organic matter and suspended matter in liquid digestate were greatly reduced,the pH changed from alkaline to acidic,and the maximum COD removal rate was 67.6%.For the high concentration liquid digestate(COD of 5000-30000 mg/L),microbial agents were added by one-time and liquid digestate was continuously added during 9 d.The pH of liquid digestate became weak acidic,and the content of organic matter and suspended matter decreased,but the overall change under high concentration was not as obvious as that under low concentration.For different concentrations of liquid digestate,different methods for adding microbial agents can be used to achieve considerable purification effect,which can provide reference for treatment and utilization of liquid digestate.

关 键 词：微生物菌剂 沼液 接种方式 理化性质 

分 类 号：S216.4[农业科学—农业机械化工程]