Short-Cut Nitrification–Denitrification Spatial Combination Technology for Treating High-Concentration Nitrogen-Containing Wastewater: Influence of pH and Carbon Source

IF 1.5 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Clean-soil Air Water Pub Date : 2024-09-27 DOI:10.1002/clen.202300439

Shuhe Chen, Yiman Gao, Cheng Wang, Xuemin Ma, Beidou Xi, Wenbing Tan

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引用次数: 0

Abstract

Short-cut nitrification (SCN) and denitrification (DN) technology is an efficient method for treating high-concentration nitrogen-containing wastewater. However, controlling the reaction conditions in single-reactor systems is difficult. In this study, SCN and DN were performed in separate reactors to investigate the influence of pH on SCN and the effect of carbon sources on DN. The results revealed that a combination of SCN and DN achieved a total nitrogen removal efficiency of 84%. Within a specific pH range (6.5–9.0), the accumulation of nitrite during SCN exhibited an initial increase, followed by a decrease, reaching a maximum at pH 8.5. In addition, this study established two experimental groups to investigate the effect of carbon sources on DN. The blank group (without the addition of a carbon source) exhibited a chemical oxygen demand (COD) concentration of 5.1 mg/L, whereas the control group (sodium acetate used as the carbon source) exhibited a COD concentration of 118.6 mg/L. These results indicate a substantial improvement in DN efficiency with the addition of a carbon source.

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处理高浓度含氮废水的短程硝化-反硝化空间组合技术：pH 值和碳源的影响

短程硝化（SCN）和反硝化（DN）技术是处理高浓度含氮废水的有效方法。然而，单反应器系统中的反应条件很难控制。在本研究中，SCN 和 DN 分别在不同的反应器中进行，以研究 pH 值对 SCN 的影响以及碳源对 DN 的影响。结果表明，SCN 和 DN 的组合实现了 84% 的总脱氮效率。在特定的 pH 值范围（6.5-9.0）内，SCN 过程中亚硝酸盐的累积量呈现出先增加后减少的趋势，在 pH 值为 8.5 时达到最大值。此外，本研究还设立了两个实验组来研究碳源对 DN 的影响。空白组（未添加碳源）的化学需氧量（COD）浓度为 5.1 毫克/升，而对照组（使用醋酸钠作为碳源）的 COD 浓度为 118.6 毫克/升。这些结果表明，添加碳源后，DN 的效率大大提高。

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来源期刊

Clean-soil Air Water 环境科学-海洋与淡水生物学

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

3.6 months

期刊介绍： CLEAN covers all aspects of Sustainability and Environmental Safety. The journal focuses on organ/human--environment interactions giving interdisciplinary insights on a broad range of topics including air pollution, waste management, the water cycle, and environmental conservation. With a 2019 Journal Impact Factor of 1.603 (Journal Citation Reports (Clarivate Analytics, 2020), the journal publishes an attractive mixture of peer-reviewed scientific reviews, research papers, and short communications. Papers dealing with environmental sustainability issues from such fields as agriculture, biological sciences, energy, food sciences, geography, geology, meteorology, nutrition, soil and water sciences, etc., are welcome.