数字农科院2.0

Nitrogen removal from digested effluent of swine wastewater using an integrated aeration (mixing)–sedimentation reactor

文献类型： 外文期刊

作者： Jiaxin Liu;Yingying Cai;Yan Huang;Jingni Zhang;Hongnan Yang;Wenguo Wang;Liangwei Deng

作者机构：

关键词： Anammox;Fillers;Microaerobic–anoxic;Nitrogen removal;Swine wastewater

期刊名称： Journal of Water Process Engineering

ISSN： 2214-7144

年卷期： 2025 年 71 卷

页码：

收录情况： SCIE（2025版）

摘要： An integrated aeration (mixing)–sedimentation reactor was designed and developed. In this study, microaerobic reactor and anoxic reactor were connected in series to study nitrogen removal from digested effluent of swine wastewater, as well as the effects of the influent chemical oxygen demand (COD)/N ratio and adding fillers on the nitrogen removal efficiency. The concentration of ammonia nitrogen in the influent was 875–1096 mg·L−1, and under the conditions of COD/N ratios of 2.74, 1.97 and 1.64, the nitrogen removal performance reduced as the influent COD/N ratio decreased. Adding fillers did not improve the NH4+–N removal performance but it could enhance the total inorganic nitrogen (TIN) removal performance. NREs of reactors with fillers were 5.15, 2.44 and 2.34 % higher than those without fillers, respectively. NH4+–N and TIN were mainly removed by the first stage (microaerobic) reactor, with a contribution proportion to nitrogen removal of >90.1 and 74.1 %, respectively. In the second stage (anoxic) reactor, the enrichment of anammox was greater in the reactors without fillers. Under influent COD/N ratios of 2.74, 1.97, and 1.64, the contribution proportion of anammox to nitrogen removal in reactors without fillers were 21.8, 16.1, and 44.3 percentage points higher than those in reactors with fillers.

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