摘要
文章采用物料衡算模型、微生物衡算模型和一级动力学模型对两级CSTR厌氧消化系统的运行性能进行了研究。研究结果表明:两级厌氧消化系统HRT(20+20)d和HRT(30+10)d的产甲烷系数分别比单级厌氧消化系统HRT40d增加了5.38%和5.99%;HRT(20+20)d和HRT(30+10)d的第一级反应器的一级动力学常数高于HRT40d以及HRT(20+20)d和HRT(30+10)d的第二级反应器的一级动力学常数;HRT40d,HRT(20+20)d和HRT(30+10)d的微生物产率系数分别为0.003 8,0.016 6和0.020 4;在不同有机负荷率下,HRT(20+20)d,HRT30+10d和HRT40d的平均微生物浓度分别为0.221~0.350,0.275~0.447,0.047~0.076 g/L。
In this paper, substrate balance model, biomass balance model and first order kinetic model were adopted to evaluate the operating performance of both single and two-stage CSTR systems treating corn stover. The substrate balance model showed that the methane production coefficient of the HRT(20+20) d and HRT(30+10) d two-stage anaerobic digestion system were5.38% and 5.99% higher than that of HRT40 d single-stage system, respectively. It was found through the first-order kinetic model that the first-order kinetic constant of the anaerobic digestion systems followed the order: First-stage of the serial systems > single system > secondstage of the serial systems. The biomass balance model was used to calculate the microbial yield coefficients, and the microbial yield coefficients were 0.003 8, 0.016 6 and 0.020 4 for HRT40 d,HRT(20+20) d and HRT(30+10) d, respectively. For the average microorganisms concentration in HRT(30+10) d, HRT(20+20) d and HRT40 d with different organic loading rates, there were0.275~0.447,0.221~0.350,0.047~0.076 g/L, respectively.
作者
李玉倩
马俊伟
袁海荣
李秀金
Li Yuqian;Ma Junwei;Yuan Hairong;Li Xiujin(Department of Environmental Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China;School of Environment,Beijing Normal University,Beijing 100875,China)
出处
《可再生能源》
CAS
CSCD
北大核心
2022年第1期1-7,共7页
Renewable Energy Resources
基金
科技部国际合作项目(2018YFE0111000)。
