摘要
产甲烷潜力测试广泛应用于厌氧消化(沼气发酵)过程的优化、发酵原料产甲烷潜力、污泥活性和原料毒性评价。在产甲烷潜力测试过程中,往往需要取出一定量的发酵料液用于监测其理化指标的变化,以便多角度监测厌氧消化过程性能。但是,从发酵瓶中取出发酵料液往往会使空气进入发酵瓶,影响发酵体系厌氧环境以及气体成分。既能从沼气发酵瓶中取样又不影响厌氧环境和沼气成分,是产甲烷潜力测试亟需解决的问题。针对这个问题,该研究改进了传统产甲烷潜力测试装置,设计了新的测试装置,新装置可实现发酵料液的非开口取样,使发酵过程中取样监测更加方便。对比研究了传统产甲烷潜力测试装置与新装置的测试性能,评价了装置的取样和发酵结果的可靠性。结果表明,新装置取样代表性更高,液体取样相对误差减小34.5个百分点,同时,新装置在精密性和准确度方面也表现更好,新装置测得的葡萄糖产甲烷潜力相对误差仅为1.50%,精密度略高于传统装置;新装置测试结果与理论值的相对偏差为2.19%,比传统发酵装置降低4.51个百分点,更接近葡萄糖理论产甲烷量。
Methanogenic potential testing is widely used in the optimization of anaerobic digestion(biogas fermentation) process,and the evaluation of methanogenic potential of fermentation materials,the activity of sludge and the toxicity of raw materials.In the process of methanogenic potential testing,it is often necessary to take out a certain amount of fermentation liquid to monitor the changes of its physical and chemical parameters,so as to monitor the performance of the anaerobic digestion process from multiple perspectives However,taking out the mixed liquid from the fermentation bottle often causes air to enter it,which affects the anaerobic environment and gas composition.Sampling from the biogas fermentation bottle without affecting the anaerobic environment and biogas composition is an urgent problem to be solved in the methanogenic potential testing.In response to this problem,this research tried to improve the traditional methanogenic potential testing device,and a new test device was designed,which could realize non-open sampling of the fermentation liquid,making it more convenient for sampling and monitoring during the digestion process.The testing performance of the traditional one and new one were compared and studied,and the reliability of the sampling and fermentation results was evaluated.The results showed that the new device sampling was more representative,and the relative error of liquid sampling was reduced by 34.5%.At the same time,the new device also performed better in terms of precision and accuracy.The relative error of methanogenic potential of glucose measured by the new device was only 1.50%,the precision was slightly higher than that of the traditional device.The relative deviation between the experimental results and the theoretical values was 2.19%,which was 4.51% lower than that of the traditional fermentation device and was closer to the theoretical methanogenic potential of glucose.
作者
侯腾飞
熊炜
张驭舟
刘刚金
刘佳鑫
王爽
梁兰梅
邓良伟
HOU Teng-fei;XIONG Wei;ZHANG Yu-zhou;LIU Gang-jin;LIU Jia-xin;WANG Shuang;LIANG Lan-mei;DENG Liang-wei(Bio-gas Institute of Ministry of Agriculture and Rural Affairs,Chengdu 610041,China;Green Energy Eco-tech Co LTD,Yicheng 441400,China;Key Laboratory of Development and Application of Rural Renewable Energy,Ministry of Agriculture and Rural Affairs,Chengdu 610041,China)
出处
《中国沼气》
2021年第6期32-38,共7页
China Biogas
基金
财政部和农业农村部(CARS-35-06B)
四川省重大科技专项(20ZDYF0003)
中国农业科学院科技创新工程(CAAS-ASTIP-2016-BIOMA)。
关键词
产甲烷潜力
测试装置
三联排水法
方法评估
Biochemical methane potential
test device
triple drainage method
method evaluation
