Experimental investigation of simultaneous nitrification-denitrification and phosphorus removal in pilot-scale sequencing batch moving bed biofilm reactors (SB-MBBRs)

IF 4.5 3区工程技术 Q1 WATER RESOURCES

Water Resources and Industry Pub Date : 2024-04-30 DOI:10.1016/j.wri.2024.100258

A.B. Fanta , S. Sægrov , K. Azrague , S.W. Østerhus

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Abstract

Sequencing batch moving bed biofilm reactors have been widely used in commercial wastewater treatment facilities for organic carbon and nitrogen removal. However, these reactors can remove low phosphorus (P) levels. Therefore, this study investigated the potential of SB-MBBRs for maximizing simultaneous nitrification-denitrification and P removal (SNDPR) potential from P-rich municipal wastewater impacted by industrial discharges. A series of experiments were carried out to investigate the effect of external volatile fatty acid (VFA) dosing, airflow rate, and temperature on SNDPR using pilot-scale SBMBBRs. Stable and robust SNDPR was achieved with an optimum acetic acid supply of 150 mg SCOD/L, at 20 ^oC and 2.5 L air/min. A low airflow rate (AFR) and high-temperature conditions affected P release and uptake kinetics. Efficient PHA storage, dissolved oxygen (DO) transfer (outer layer), DO diffusion limitation (inner layer) of biofilm, and conversion of NH₄-N to NO₂-N/NO₃-N enhanced SNDPR in the two pilot SB-MBBRs.

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中试规模序批式移动床生物膜反应器（SB-MBBR）中硝化-反硝化和除磷同步进行的实验研究

序批式移动床生物膜反应器已广泛应用于商业废水处理设施，用于去除有机碳和氮。然而，这些反应器去除磷（P）的水平较低。因此，本研究调查了移动床生物膜反应器（SB-MBBR）在最大限度地同时去除受工业排放影响的富含磷的城市污水中的硝化-反硝化和磷（SNDPR）方面的潜力。利用中试规模的 SBMBBR 进行了一系列实验，研究外部挥发性脂肪酸（VFA）投加量、气流速率和温度对 SNDPR 的影响。在 20 oC 和 2.5 L 空气/分钟的条件下，最佳醋酸供应量为 150 mg SCOD/L，从而实现了稳定和稳健的 SNDPR。低气流速率（AFR）和高温条件影响了 P 的释放和吸收动力学。高效的 PHA 储存、生物膜的溶解氧（DO）传输（外层）、溶解氧扩散限制（内层）以及 NH4-N 向 NO2-N/NO3-N 的转化提高了两个中试 SB-MBBR 的 SNDPR。

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来源期刊

Water Resources and Industry Social Sciences-Geography, Planning and Development

CiteScore

8.10

自引率

5.90%

发文量

审稿时长

75 days

期刊介绍： Water Resources and Industry moves research to innovation by focusing on the role industry plays in the exploitation, management and treatment of water resources. Different industries use radically different water resources in their production processes, while they produce, treat and dispose a wide variety of wastewater qualities. Depending on the geographical location of the facilities, the impact on the local resources will vary, pre-empting the applicability of one single approach. The aims and scope of the journal include: -Industrial water footprint assessment - an evaluation of tools and methodologies -What constitutes good corporate governance and policy and how to evaluate water-related risk -What constitutes good stakeholder collaboration and engagement -New technologies enabling companies to better manage water resources -Integration of water and energy and of water treatment and production processes in industry