铝合金污泥中可燃气体的产生机理  

Mechanism of Combustible Gas Production in Aluminum Alloy Sludge

作　　者：李钰欣 许开立[1] 王犇[1] 耿丽艳[1] LI Yu-xin;XU Kai-li;WANG Ben;GENG Li-yan(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2022年第5期748-754,共7页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(52074066).

摘　　要：基于污泥量、静置时间、除菌前后的产气实验,结合扫描电镜、粒度分析、元素分析、微生物群落分析等手段测试产生气组分、分析产气规律,并研究产气机理.实验结果表明:污泥产生气的成分为H_(2),CO_(2)及少量CH_(4).污泥产气量与污泥中细菌含量成正比.产气机理为污泥中的细菌在代谢过程中产生H_(2)和CO_(2)的同时,形成的酸性环境腐蚀了污泥颗粒表面氧化层并形成孔洞,污泥中水分沿孔洞进入颗粒内部与合金发生产氢反应,提高了产生气中H_(2)的比例.H_(2)和CO_(2)为污泥中的甲烷杆菌目细菌提供代谢原料,促进CH_(4)产生.Based on the gas production experiment of sludge quantity,standing time and before and after impurity removal,combined with SEM,particle size analysis,element analysis and microbial community analysis,the composition and law of gas production were analyzed to study gas production mechanism.The experimental results show that the gas produced by the sludge is composed of H_(2),CO_(2) and a small amount of CH_(4).The gas production is proportional to the amount of sludge and the standing time.The mechanism of gas production is that fermentation and hydrolysis bacteria produce H_(2) and CO_(2) in the metabolic process,and produce acidic substances which can corrode the protective film on the surface of aluminum alloy and form holes.Moisture enters the interior of particles along the holes and reacts with the alloy to produce hydrogen.H_(2) and CO_(2) provide metabolic materials for Methane archaea in sludge to produce CH_(4).

关 键 词：微生物 氢气 甲烷 二氧化碳 铝合金 污泥 

分 类 号：X9[环境科学与工程—安全科学]