蚓粪促进玉米秸秆厌氧消化产气效果的研究  

Biogas Production Effect of Maize Stalk Anaerobic Digestion in Which Adding Earthworm Manure

作　　者：刘慧[1,2] 曹艳娟[2] 邹星星[3] 

机构地区：[1]河海大学南方地区高效灌排与农业水土环境教育部重点实验室,南京210098 [2]河海大学水利水电学院,南京210098 [3]南京大学污染控制与资源化研究国家重点实验室,南京210093

出　　处：《农业环境科学学报》2010年第11期2228-2231,共4页Journal of Agro-Environment Science

基　　金：中央高校基本科研业务费专项资金资助(2009B09114);浅水湖泊综合治理与资源开发教育部重点实验室开放基金(1061408125);河海大学引进人才启动基金(208440501106)

摘　　要：以玉米秸秆为试验研究对象,比较添加蚓粪后对秸秆厌氧消化产气特性的影响。在接种污泥比例为20%、30%、50%时,添加适当蚓粪,使其在35℃下中温厌氧消化,试验中研究产气量、pH值和乙酸产生量等参数的变化趋势。结果表明,添加蚓粪后,各处理的产气量均显著增加,其中50%接种污泥的处理累积产气量达340mL,增幅达67.05%,添加蚓粪的物料发挥了最大的产气效果。试验过程中pH值相对稳定,乙酸累积量较低。蚓粪的添加抑制了酸的累积,使pH稳定在一定的范围。During the development and application of anaerobic fermentation,it is an important and difficult key to improve the biogas production.In the resent years,the additives have been mostly used.This experiment added the earthworm manure in the maize straw when the inoculation solution concentration was 20%,30% and 50%.The digestion processes were conducted under the temperature of 35 ℃.During the process,pH and volatile fatty acid（VFA）-primarily acetic acid were monitored every 5 days,and the biogas production was surveyed at the same time.The results showed that,the biogas production of all treatments improved significantly.When the concentration of the inoculated liquid was 50%,adding earthworm manure could cause an increase of 67.05% in the amount of gas produced.Through the monitoring of the acetic acid and pH,we found that earthworm manure could prevent acid accumulation and buffer the decreasing of pH value so that pH is more stable in a certain range.The treatment of 50% had a great operating factor of maize straw.Therefore,adding the earthworm manure could be used as a new exploration direction during solid-state anaerobic digestion,besides,it is a good beginning to quest suitable proportion of maize straw and earthworm manure in order to improve the efficiency of resource utilization of crop straw.

关 键 词：玉米秸秆 蚓粪 厌氧发酵 沼气 

分 类 号：X712[环境科学与工程—环境工程]