摘要
文章通过在线监测连续投料的厌氧消化产气过程,对不同阶段的累积产气量、CH 4和CO 2浓度应用Logistic函数进行拟合并比较其结果。研究发现:1)连续投料厌氧消化过程的各阶段累积产气量与消化时间的关系与Logistic函数的S型曲线相吻合,拟合曲线的均方差R 2高于0.99;2)采用Logistic函数拟合产气中CH 4和CO 2的含量随时间变化的数据,拟合曲线的均方差R 2也高于0.98;3)沼气中CH 4和CO 2的浓度此消彼长动态相关,其拟合曲线的交点接近50%。应用拟合曲线进行动态模拟仿真,可实现对厌氧消化过程的智能化控制。
A continuous feeding anaerobic digestion biogas production process was monitored online.The cumulative biogas production,concentrations of CH 4 and CO 2 in different stages were fitted with Logistic function,and the results were compared.The study found that:1)The relationship between cumulative gas production and digestion time in each stage of continuous feed anaerobic process was consistent with the S-curve of the Logistic function,and the mean square error R 2 of the fitted curve was higher than 0.99.2)The relationship between concentrations of CH 4 and CO 2 in biogas with digestion time was fitted by Logistic function,and the mean square error R 2 of the fitted curve was also higher than 0.98.3)The content of CH 4 and CO 2 in biogas was dynamically balanced,and the intersection of the fitting curve was close to 50%.By applying the fitting curve to the dynamic simulation,the intelligent control of anaerobic digestion process can be realized.
作者
郑锐
蒋东云
农以宁
谢鸿全
颜家兴
ZHENG Rui;JIANG Dong-yun;NONG Yi-ning;XIE Hong-quan;YAN Jia-xing(School of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin 541004,China;School of Life and Environmental Science,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Research Institute of Chemical Industry Co Ltd,Nanning 530001,China)
出处
《中国沼气》
2019年第6期19-24,共6页
China Biogas
基金
国家科技支撑计划项目(2015BAL04B03)
桂科(AB18221104)
广西重点研发桂科(AB16380321)
中央引导地方科技发展专项
