气升式藻-菌共生反应器去除氯苯及吸收CO_(2)性能研究  

Removal of waste gas containing chlorobenzene and the simultaneous CO_(2) absorption by an airlift algae-bacteria symbiotic reactor

作　　者：孔宪旺 陈昌文 袁镇 陆李超 陈建孟 陈东之 KONG Xianwang;CHEN Changwen;YUAN Zhen;LU Lichao;CHEN Jianmeng;CHEN Dongzhi(Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control,Zhejiang Ocean University,Zhoushan 316022,China;College of Environment,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江海洋大学浙江省石油化工环境污染控制重点实验室,浙江舟山316022 [2]浙江工业大学环境学院,浙江杭州310014

出　　处：《实验技术与管理》2024年第5期38-45,共8页Experimental Technology and Management

基　　金：舟山科技计划项目浙江海洋大学专项(2022C41015)。

摘　　要：CO_(2)是生物法处理有机废气过程中的主要副产物之一,对其进行有效吸收可实现废气治理减污降碳协同的目标。该文以氯苯为模型污染物,在气升式细菌反应器中添加蛋白核小球藻(C.pyrenoidosa),构建气升式藻-菌共生反应器,初步探究了藻-菌体系对废气去除、CO_(2)吸收、微生物群落结构等关键指标的影响。结果表明在不同停留时间和氯苯进口浓度条件下,气升式藻-菌共生反应器对氯苯的去除率超过90%,与气升式细菌反应器无明显差异,然而气升式藻-菌共生反应器的出口CO_(2)浓度显著低于气升式细菌反应器,75天的运行周期内CO_(2)累积排放量降低了约25%。[Objective]Biological methods have emerged as a promising solution for the treatment of low-concentration waste gases containing volatile organic compounds(VOCs).These methods are distinguished by their low energy requirements,minimal secondary pollution,and reduced operational and maintenance costs.However,one of the drawbacks of VOC biodegradation is the inevitable emission of CO_(2),a normal intermediate product.Studies have shown that up to 60%or more of the carbon in VOCs can be converted into CO_(2),thereby increasing the carbon footprint of different bioreactors.In this context,microalgae,known for their photoautotrophic nature,have shown significant potential for biological carbon sequestration.This study explores the cultivation of microalgae alongside VOC-degrading bacteria within an algae-bacteria symbiotic reactor.The aim is to utilize the CO_(2) resulting from VOC biodegradation in situ by microalgae,therefore achieving simultaneous pollution control and carbon mitigation.[Methods]Chlorobenzene was selected as the model pollutant for this study.We established an airlift algae-bacteria reactor(ABR)using C.pyrenoidosa and Ralstonia sp.XZW-1 as the initial inoculum.For comparative purposes,a conventional airlift bacterial reactor(BR)inoculated with Ralstonia sp.XZW-1 was utilized.The exterior of the ABR reactor was equipped with four LED lights to provide constant illumination throughout the experiment,while the outer surface of the BR was entirely wrapped by aluminum foil to prevent light penetration and prevent unintended microalgae growth.Key performance metrics,such as gas removal efficiency,maximum elimination capacity,and microbial community structure,were investigated to evaluate the ABR’s effectiveness in purifying waste gas containing chlorobenzene.Comparisons of CO_(2) production between ABR and BR highlighted the ABR’s carbon mitigation potential.Additionally,chlorophyll-a concentration was measured as an indicator of microalgae growth,and other parameters such as dissolved oxygen concent

关 键 词：废气处理 微藻 生物降解 碳减排 

分 类 号：X511[环境科学与工程—环境工程]