XUGuan-yu,ZHAOHong-mei,ZHANGZhen-xing,et al.Research Progress of Iron-Carbon Micro-electrolysis and Its Coupling Biological Denitrification[J].China Water & Wastewater,2024,40(22):29-39.
铁碳微电解及其耦合生物脱氮的研究进展
- Title:
- Research Progress of Iron-Carbon Micro-electrolysis and Its Coupling Biological Denitrification
- 摘要:
- 随着污水氮排放标准的提升，污水生物脱氮过程中碳源不足、脱氮能效低等问题日益突出。为了降低对有机碳源的需求，同时强化生物脱氮效果，越来越多的研究者开始探索采用铁碳微电解（-ME）与生物处理耦合的工艺来去除污水中的氮素。梳理了近年来-ME工艺在硝酸盐氮脱除领域的研究进展，剖析了-ME的原电池反应理论，以及不同铁电极和碳电极对反应的影响规律，阐明了微电解化学脱氮和耦合生物脱氮过程的关键因素和反应机理，同时从微生物的生长环境以及微生物酶的影响等角度分析了-ME过程对生物脱氮的强化作用，在此基础上提出了铁碳微电解耦合生物脱氮体系目前面临的问题和未来的发展方向。
- Abstract:
- With the advancement of the standard for nitrogen removal from wastewater, challenges such as insufficient carbon sources and low nitrogen removal efficiency have emerged in biological nitrogen removal processes. To address these issues, researchers have been exploring the combination of chemical and biological methods to reduce the demand for organic carbon sources and enhance the effectiveness of biological nitrogen removal. The removal of nitrate nitrogen by iron-carbon micro-electrolysis (IC-ME) was introduced and the galvanic cell reaction theory of IC-ME was briefly described. The influence of different iron electrode and carbon electrode on the reaction, and the impact factors and reaction mechanism of chemical denitrification and coupled biological denitrification by micro-electrolysis were also summarized. Additionally, the enhanced effect of IC-ME process on biological nitrogen removal was analyzed from the perspectives of the growth environment and microbial enzymes. Finally, this paper addressed the current challenges and proposes future development directions for the system.
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