甲醇型和乙酸钠型反硝化过程一氧化二氮释放的影响
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摘要
碳源、碳氮比是污水生物处理过程中一氧化二氮释放的重要影响因素。试验采用甲醇、乙酸钠为碳源,硝酸盐为电子受体,研究不同碳源、碳氮比(C/N)条件下一氧化二氮释放情况。结果发现一氧化二氮释放主要在低碳氮比情况且释放总量受碳源影响。乙酸钠做碳源,碳氮比为4. 5能避免一氧化二氮产生。
Carbon source and C/N ratios are important factors affecting the emission of nitrous oxide( N2O) in biological wastewater treatment processes. In this study,we use methanol and sodium acetate as carbon source and,nitrate as electron acceptor to study releases of nitrous oxide in different carbon sources and nitrogen ratio( C/N) condition. Our results showed that nitrous oxide is released mainly in the case of low-nitrogen ratio and the amount of N2 O release is affected by carbon source. The experimental conditions which is sodium acetate as carbon source and C/N ratios equal 4. 5 can avoid producing nitrous oxide.
Carbon source and C/N ratios are important factors affecting the emission of nitrous oxide( N2O) in biological wastewater treatment processes. In this study,we use methanol and sodium acetate as carbon source and,nitrate as electron acceptor to study releases of nitrous oxide in different carbon sources and nitrogen ratio( C/N) condition. Our results showed that nitrous oxide is released mainly in the case of low-nitrogen ratio and the amount of N2 O release is affected by carbon source. The experimental conditions which is sodium acetate as carbon source and C/N ratios equal 4. 5 can avoid producing nitrous oxide.
引文
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[2]刘秀红,鞠然,刘立超,等.生活污水短程生物脱氮过程中N2O的产生与控制方法[J].中国环境科学,2011,31(1):30-34.
[3]巩有奎,王淑莹,彭永臻,等.低氧条件下生物反硝化过程中N2O的产量[J].化工学报,2011,62(6):1688-1692.
[4]李莎,宫飞蓬,齐飞,等.污水生化处理过程中N2O的产生特征研究进展[J].安全与环境学报,2012,12(1):75-80.
[5]曾巍,高大文.不同碳源对颗粒污泥反硝化过程中N2O产生量的影响[J].森林工程,2011,27(4):7-9.
[6]朴哲,陈新兵,赵秀锦,等.不同SBR系统N2O排放及微生物群落比较[J].环境科学研究,2011,24(6):698-703.
[7]胡振,张建,谢慧君,等.污水生物脱氮过程N2O的产生与控制研究进展[J].环境科学与技术,2011,34(12):95-100.