Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France.
Parisian Sanitation Public Service (SIAAP), Direction Innovation, 92700 Colombes, France.
Sci Total Environ. 2022 Feb 25;809:151109. doi: 10.1016/j.scitotenv.2021.151109. Epub 2021 Oct 22.
Phosphorus (P) removal from the domestic wastewater is required to counter the eutrophication in receiving water bodies and is mandated by the regulatory frameworks in several countries with discharge limits within 1-2mgPL. Operating at higher sludge retention time (SRT) and higher biomass concentration than the conventional activated sludge process (CASP), membrane bioreactors (MBRs) are able to remove 70-98% phosphorus without addition of coagulant. In full-scale facilities, enhanced biological phosphorus removal (EBPR) is assisted by the addition of metal coagulant to ensure >95% P-removal. MBRs are successfully used for super-large-scale wastewater treatment facilities (capacity >100,000 md). This paper documents the knowledge of P-removal modeling from lab to full-scale submerged MBRs and assesses the existing mathematical models for P-removal from domestic wastewater. There are still limited studies involving integrated modeling of the MBRs (full/super large-scale), considering the complex interactions among biology, chemical addition, filtration, and fouling. This paper analyses the design configurations and the parameters affecting the biological and chemical P-removal in MBRs to understand the P-removal process sensitivity and their implications for the modeling studies. Furthermore, it thoroughly reviews the applications of bio-kinetic and chemical precipitation models to MBRs for assessing their effectiveness with default stoichiometric and kinetic parameters and the extent to which these parameters have been calibrated/adjusted to simulate the P-removal successfully. It also presents a brief overview and comparison of seven (7) chemical precipitation models, along with a quick comparison of commercially available simulators. In addition to advantages associated with chemical precipitation for P-removal, its role in changing the relative abundance of the microbial community responsible for P-removal and denitrification and the controversial role in fouling mitigation/increase are discussed. Lastly, it encompasses several coagulant dosing control systems and their applications in the pilot to full-scale facilities to save coagulants and optimize the P-removal performance.
从生活污水中去除磷以防止受纳水体富营养化，这是几个国家的法规框架所要求的，其排放标准为 1-2mgPL 以内。与传统的活性污泥工艺（CASP）相比，膜生物反应器（MBR）具有更高的污泥停留时间（SRT）和更高的生物量浓度，能够在不添加凝结剂的情况下去除 70-98%的磷。在全规模设施中，通过添加金属凝结剂来辅助增强生物除磷（EBPR），以确保 >95%的磷去除。MBR 已成功用于超大规模污水处理设施（容量>100,000md）。本文记录了从实验室到全规模浸没式 MBR 中磷去除的建模知识，并评估了用于生活污水除磷的现有数学模型。涉及到 MBR （全/超大规模）的综合建模的研究仍然有限，这是因为生物、化学添加、过滤和结垢之间的复杂相互作用。本文分析了 MBR 中影响生物和化学除磷的设计配置和参数，以了解磷去除过程的敏感性及其对建模研究的影响。此外，它还彻底审查了生物动力学和化学沉淀模型在 MBR 中的应用，以评估其使用默认化学计量和动力学参数的有效性，以及这些参数在多大程度上进行了校准/调整以成功模拟磷去除。它还介绍了七种（7）化学沉淀模型的简要概述和比较，以及商业可用模拟器的快速比较。除了化学沉淀在除磷方面的优势外，还讨论了其在改变负责除磷和反硝化的微生物群落相对丰度方面的作用，以及在减轻/增加结垢方面的有争议作用。最后，它包含了几种凝结剂投加控制系统及其在从试验到全规模设施中的应用，以节省凝结剂并优化磷去除性能。
