Integrated biological–physical process for biogas purification effluent treatment

论文摘要

Biogas purification via water scrubbing produces effluent containing dissolved CH4, H2S,and CO2, which should be removed to reduce greenhouse gas emissions and increase its potential for water regeneration. In this study, a reactor built with air supplies at the top and bottom was utilized for the treatment of biogas purification effluent through biological oxidation and physical stripping processes. Up to 98% of CH4 was removed through biological treatment at a hydraulic retention time of 2 hr and an upper airflow rate of 2.02 L/day. Additionally, a minimum CH4 concentration of 0.04% with no trace of H2S gas was detected in the off gas. Meanwhile, a white precipitate was captured on the carrier showing the formation of sulfur. According to the developed mathematical model, an upper airflow rate of greater than 2.02 L/day showed a small deterioration in CH4 removal performance after reaching the maximum value, whereas a 50 L/day bottom airflow rate was required to strip the CO2 efficiently and raise the effluent p H from 5.64 to 7.3. Microbiological analysis confirmed the presence of type 1 methanotroph communities dominated by Methylobacter and Methylocaldum. However, bacterial communities promoting sulfide oxidation were dominated by Hyphomicrobium.

论文目录

• Introduction
• 1. Materials and methods
•   1.1. Experimental setup and processes
•   1.2. Operational conditions
•   1.3. Sampling and analyses
•   1.4. Calculations
•   1.5. DNA sequencing
• 2. Model development
• 3. Results and discussion
•   3.1. System performance
•   3.2. Effect of operational conditions
•     3.2.1. Hydraulic retention time （HRT）
•     3.2.2. Effect of upper airflow rate （Q′air） on O2consumption of biological process
•     3.2.3. Influence of bottom airflow rate （Q′air） on effluent p H
•   3.3. Simulation performance
•     3.3.1. Determination of Q′airfor reducing greenhouse gas emission
•     3.3.2. Determination of Q′airfor effluent pH recovery
•   3.4. Microbial analysis
• 4. Conclusions

文章来源

类型: 期刊论文

作者: Roslan Noorain,Tomonori Kindaichi,Noriatsu Ozaki,Yoshiteru Aoi,Akiyoshi Ohashi

来源: Journal of Environmental Sciences 2019年09期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 环境科学与资源利用

单位: Department of Civil and Environmental Engineering, Graduate School of Engineering, Hiroshima University,Section of Environmental Engineering Technology, Malaysia Institute of Chemical & Bioengineering Technology,University Kuala Lumpur, Lot Kawasan Perindustrian Bandar Vendor Taboh Naning,Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University,1-3-1 Kagamiyama

基金: supported by the Japan Society for the Promotion of Sciences as a Grant-in-Aid for Scientific Research(A)(grant number JP23241029)

分类号: X703

页码: 110-122

总页数: 13

文件大小: 1511K

下载量: 12