低温热氧化法强化剩余污泥微生物燃料电池的产电特性
Power generation characteristics of sludge microbial fuel cell using low temperature thermal oxidation
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摘要: 城市污水处理厂污泥因有机物含量高而成为微生物燃料电池(MFC)应用研究的主要方向之一,而污泥中有机质的释放成为限制其发展的主要因素.本实验利用低温热解和过氧化氢氧化处理的耦合方法预处理城市污水处理厂污泥,分析了其作为燃料对MFC产电性能的影响.研究表明,利用预处理后的污泥上清液作为燃料,预处理温度、时间、pH值和过氧化氢投加量对MFC的产电性能影响大.当温度、时间、pH值和过氧化氢分别为100℃、90 min、11和500 g·kg TSS-1的预处理条件下,MFC功率密度最大,分别为235、287、233.2、280 mW·m-3.采用热氧化法预处理污泥,可有利于污泥的破解,使能被产电菌利用的营养物质增多,提高了MFC产电特性,可为污泥资源化利用提供有益的参考.Abstract: Sludge in municipal sewage treatment plants has become one of the main research directions of microbial fuel cell (MFC) application,due to its high organic content. However, the release of organic matter in sludge is the main factor of restricting its development. In this paper, the sludge in municipal sewage treatment plants was pretreated by the coupling method of low-temperature pyrolysis and hydrogen peroxide treatment, and the influence of it as fuel on the electrical performance of MFC was analyzed. The result showed that pretreatment temperature, time, pH value and hydrogen peroxide dosage had a great impact on the electricity generation of MFC when the pretreated sludge supernatant was used as fuel.When the pretreatment temperature, time, pH value and hydrogen peroxide were 100 ℃, 90 min, 11 and 500 g·kg tss-1 respectively, MFC Power Density reached the maximum value, which was 235, 287, 233.2, 280 mW·m-3.The pretreament of thermal oxidation was helpful for the solution of sludge, which increased the number of nutrients used by electricbacteria and improved the electricity generation characteristics of MFC. It could provide a beneficial reference for the utilization of sludge resources.
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Key words:
- residual sludge /
- microbial fuel cell /
- low temperature thermal oxidation /
- power density
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