Reason and control strategy for denitrification and anammox sludge flotation in nitrogen removal process: Mechanisms, strategies and perspectives

Ma, Xin; Zhang, Xin-Rui; Sun, Ying-Jun; Xi, Zhi-Han; Liu, Jin-Ze; Feng, Ze-Tong; Zhou, Jia-Min; Liu, Xin-Tao; Wang, Ying; Jin, Ren-Cun; Zhang, Qian-Qian

doi:10.1016/j.envres.2024.119456

Environmental Research

2024

DOI: 10.1016/j.envres.2024.119456

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Reason and control strategy for denitrification and anammox sludge flotation in nitrogen removal process: Mechanisms, strategies and perspectives

Xin Ma,

Xin-Rui Zhang,

Ying-Jun Sun

et al.

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Cited by 2 publications

References 72 publications

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Optimizing carbon source addition to control surplus sludge yield via machine learning-based interpretable ensemble model

Li,

Liu,

et al. 2025

Environmental Research

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Optimizing carbon source addition to control surplus sludge yield via machine learning-based interpretable ensemble model

Li,

Liu,

et al. 2025

Environmental Research

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Low Strength Wastewater Treatment Using a Combined Biological Aerated Filter/Anammox Process

Xie,

Li,

Song

et al. 2024

Water

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To achieve the in situ capacity expansion of the post-denitrification biological aerated filter (BAF-DN), the integration of BAF with the anammox process (BAF/AX) was proposed. With the objective of maximizing retaining ammonia nitrogen, the operational optimization of BAF was achieved by two distinct strategies. The treatment performance of BAF demonstrated that the removal efficiencies of chemical oxygen demand (COD) and ammonia nitrogen () was 66.3~67.3% and 4~12%, respectively, under conditions of low aeration intensity (0.4 m3·m−2·h−1) or a shortened empty bed residence time (EBRT) of 30 min. Residual in the BAF effluent served as the ammonia substrate for the subsequent anammox process, which was successfully launched by using ceramic particles and sponges as carriers. Notably, the sponge carrier facilitated a shorter start-up period of 41 to 44 days. Furthermore, the sponge-based anammox reactor exhibited a superior removal capacity (≥85.7%), under operations of a shorter EBRT of 40 min, low influent concentrations (≤30 mg/L), and COD levels of ≤67 mg/L. In addition, a comprehensive evaluation of the BAF/AX process was conducted, which considered performance, cost-effectiveness, and engineering feasibility. The performance results illustrated that the effluent quality met the standard well (with a COD level of ≤50 mg/L, and a TN of ≤3.1~10.5 mg/L). Following a comparison against the low aeration intensity operation, it was recommended to operate BAF at a low EBRT within the BAF/AX process. Consequently, the treated volume was double the volume of the standalone BAF-DN, synchronously achieving low costs (0.413 yuan/m3).

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Reason and control strategy for denitrification and anammox sludge flotation in nitrogen removal process: Mechanisms, strategies and perspectives

Cited by 2 publications

References 72 publications

Optimizing carbon source addition to control surplus sludge yield via machine learning-based interpretable ensemble model

Optimizing carbon source addition to control surplus sludge yield via machine learning-based interpretable ensemble model

Low Strength Wastewater Treatment Using a Combined Biological Aerated Filter/Anammox Process

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