Water Research X最新文献_第7页

Carbon source and electro-stimulation modulates performance, microbial ecology, and metabolism in U (VI) bioreduction systems 碳源和电刺激调节U （VI）生物还原系统的性能、微生物生态和代谢

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-10-10 DOI: 10.1016/j.wroa.2025.100428

Chunlin Wang , Fan Chen , Jingjing Wang , Qi Huang , Yuxuan Lou , Ruoyu Du , Zena Zhang , Cheng Yan , Wenzong Liu , Yuheng Wang

Efficient removal and recovery of uranium from mining wastewater are essential for environmental protection and resource sustainability. Microbial reduction of soluble U(VI) to insoluble U(IV) is a promising strategy, but the role of biostimulation via tailored carbon sources and electrochemical inputs remains underexplored. This study investigated how carbon sources and electrode stimulation affect U(VI) reduction efficiency, product formation, microbial communities, and metabolic functions. U(VI) removal followed the order of carbon source: glucose > lactic acid > sodium acetate. Electro-stimulation markedly enhanced U(VI) reduction, especially under sodium acetate conditions with E_24h increased from 65.0% to 90.7% at 0.7 V, by promoting carbon sources utilization and accelerating the removal of competitive anions. Glucose and lactic acid promoted the formation of UO₂, while sodium acetate favored U₃O₈. Electro-stimulation facilitated the formation of compact uranium precipitates, enhancing recovery potential and minimizing reoxidation risk. Electrochemical analyses revealed that glucose and lactic acid exhibited superior electrochemical behavior compared to sodium acetate. Combined biostimulation enriched redox-active, electroactive, and EPS-secreting microbial taxa, along with functional genes related to U(VI) reduction, electron transfer, and carbon metabolism. Glucose and lactic acid imposed stronger selection on microbial and genetic structures than sodium acetate. Electro-stimulation promoted metabolic diversification, enhancing microbial resilience and functional redundancy. This study offers valuable insights into electrochemical enhancement of the biological treatment of uranium-bearing wastewater.

矿山废水中铀的高效去除和回收对环境保护和资源可持续性至关重要。微生物将可溶性U（VI）还原为不溶性U（IV）是一种很有前途的策略，但通过定制碳源和电化学输入的生物刺激的作用仍未得到充分探索。本研究探讨了碳源和电极刺激对U（VI）还原效率、产物形成、微生物群落和代谢功能的影响。脱除U（VI）的碳源顺序为：葡萄糖>；乳酸>；乙酸钠。电刺激通过促进碳源利用和加速竞争阴离子的去除，显著提高了U（VI）的还原率，特别是在醋酸钠条件下，E24h在0.7 V时从65.0%提高到90.7%。葡萄糖和乳酸促进UO2的生成，而醋酸钠有利于U3O8的生成。电刺激促进了致密铀沉淀的形成，提高了开采潜力，最大限度地降低了再氧化风险。电化学分析表明，与乙酸钠相比，葡萄糖和乳酸表现出更好的电化学行为。联合生物刺激富集了氧化还原活性、电活性和eps分泌微生物类群，以及与U（VI）还原、电子转移和碳代谢相关的功能基因。葡萄糖和乳酸对微生物和遗传结构的选择作用强于醋酸钠。电刺激促进代谢多样化，增强微生物恢复力和功能冗余。本研究为电化学强化含铀废水的生物处理提供了有价值的见解。

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引用次数: 0

Social and governmental influences when engaging in citizen participatory water quality monitoring in lower middle-income countries (LMICs) 在中低收入国家（LMICs）从事公民参与式水质监测时的社会和政府影响

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-10-08 DOI: 10.1016/j.wroa.2025.100425

Takashi Nedachi , Joanna Oporto , Carmiña Calderon , Elfy Flores , Maricela Rodríguez , Jorge Párraga , Osamu Nishimura

In many lower-middle-income countries, rapid urbanization and high population growth severely affect domestic wastewater pollution in urban water bodies. Thus, it is imperative to consider not only the technical but also the social and governance aspects of promoting key countermeasures, such as wastewater treatment plants, for which social acceptance is required. Interventions through an international cooperation project in the Rocha River Basin in Bolivia clarified the awareness gaps related to water pollution, applied citizen participatory water quality monitoring using a human five-sense assessment method, and achieved reasonable awareness changes and adaptable local activities. However, existing studies on the relationship between citizen participation and adaptable local activities from the perspective of local governments with limited resources and interventions in international cooperation remain unknown. Here, the validity and applicability of this method with citizen participation and its success and limitations were evaluated, considering technical, social, and governmental aspects as well as government-perceived costs and benefits related to decision-making. The results revealed that this method has adequate validity and potential to promote effective awareness among citizens. Furthermore, positive interactions between citizen participation and obligatory water quality monitoring were identified as factors for continuous local activities. These findings provide an adequate design and approach for international cooperative interventions in lower-middle-income countries with limited resources.

在许多中低收入国家，快速城市化和人口高速增长严重影响了城市水体中的生活废水污染。因此，不仅要考虑技术方面的问题，还要考虑推动关键对策的社会和治理方面的问题，例如废水处理厂，这需要社会的认可。通过在玻利维亚罗查河流域开展的国际合作项目进行干预，澄清了与水污染相关的认识差距，采用人的五感评价方法，应用公民参与式水质监测，实现了合理的认识变化和适应性强的地方活动。然而，从资源有限的地方政府和参与国际合作的地方政府的角度对公民参与与适应性地方活动之间关系的研究尚不清楚。在这里，考虑到技术、社会和政府方面以及政府感知的与决策相关的成本和收益，评估了这种方法在公民参与下的有效性和适用性，以及它的成功和局限性。结果表明，该方法具有足够的有效性和潜力，可以提高公民的有效意识。此外，公民参与和强制性水质监测之间的积极互动被确定为持续的地方活动的因素。这些发现为资源有限的中低收入国家的国际合作干预提供了适当的设计和方法。

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引用次数: 0

Extraneous water in sewer systems: A Comprehensive review on sewer infiltration and inflow quantification, localization and mitigation 下水道系统中的外来水：下水道渗透和流入量化、定位和缓解的综合综述

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-10-08 DOI: 10.1016/j.wroa.2025.100426

Hao Zhang , Haifeng Jia , Adriaan Mels , Huub Rijnaarts , Wei-Shan Chen

Sanitary sewer systems are designed to convey wastewater from households and industries to wastewater treatment plants (WWTPs); however, in most cases they also collect a considerable amount of additional water via infiltration and inflow (I/I). I/I not only increases the conveyance and treatment burden but also places threats on sewer overflow and ground collapse. The various sources of I/I and sewer components (i.e., sewer mains, sewer laterals and maintenance holes) and their interactions make the I/I detection, analysis and mitigation challenging in practice. Abundant research has addressed I/I quantification, I/I localization and sewer rehabilitation respectively, which provides substantial amount of knowledge and data for advising I/I mitigation. Nevertheless, there is a lack of a systemic overview of these research efforts and an integral analysis and synthesis of these research outcomes (including knowledge, tools, methods and data), which hinders the effective use of these researches for advising on I/I mitigation and advancing future research. To address this gap, a systematic review was conducted. The study synthesized the suitability and limitations of various quantification methods, assessed the applicability of I/I localizaiton methods across different contexts, and developed a data-driven model to estimate I/I reduction effectiveness based on the rehabilitation degree of sewer-network components, including sewer mains, sewer laterals, and maintenance holes to support planning of future I/I mitigation and sewer rehabilitation. To this end, correlating the extent of sewer-component-specific rehabilitation and the I/I reduction rate may be a potential data-driven approach to support I/I mitigation, as briefly demonstrated in this study.

卫生下水道系统的设计目的是将家庭和工业废水输送到污水处理厂；然而，在大多数情况下，它们也通过入渗和流入（I/I）收集相当多的额外水。I/I不仅增加了运输和处理负担，而且对下水道溢流和地面塌陷构成威胁。I/I的各种来源和下水道组成部分（即下水道总管道、下水道横向和维修孔）及其相互作用使I/I的检测、分析和缓解在实践中具有挑战性。大量的研究分别解决了污染/污染量化、污染/污染定位和下水道修复问题，为减少污染/污染提供了大量的知识和数据。然而，缺乏对这些研究工作的系统概述以及对这些研究成果（包括知识、工具、方法和数据）的整体分析和综合，这妨碍了有效利用这些研究，就缓解I/I问题提供咨询意见和推进未来的研究。为了解决这一差距，进行了系统审查。该研究综合了各种量化方法的适用性和局限性，评估了不同背景下I/I定位方法的适用性，并开发了一个数据驱动的模型，基于下水道网络组件（包括下水道总管、下水道横向和维修孔）的修复程度来估计I/I减少效果，以支持未来I/I缓解和下水道修复的规划。为此，将下水道特定组分的修复程度与I/I减少率联系起来，可能是一种潜在的数据驱动方法，以支持减少I/I，本研究简要说明了这一点。

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引用次数: 0

Hierarchical ultra microporous aluminum based metal organic aerogels for water purification: Kinetic, isotherm, and regeneration insights into diclofenac adsorption 分级超微孔铝基金属有机气凝胶用于水净化：动力学，等温线和再生洞察双氯芬酸吸附

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-09-30 DOI: 10.1016/j.wroa.2025.100424

Dhivya Jagadeesan , H.M. Solayman , Che-Jung Hsu , Wei-Lin Lu , Ruei-Feng Shiu , Yi-Feng Lin , Jheng-Jie Jiang

The widespread use of Diclofenac (DCF), a non-steroidal anti-inflammatory drug (NSAID) has resulted their persistent presence in aquatic environments which posing risks to both human health and ecosystems. In this study, we synthesized aluminum-based metal organic aerogels (Al-MOAs) through a Sol-gel method to explore the efficiency as adsorbents for DCF removal is aqueous solution. Al-MOAs exhibited a high microporosity, high specific surface area (1702.5 m²/g), and excellent mechanical stability confirmed by physicochemical characterization. Therefore, Al-MOAs revealed fast adsorption kinetics and achieved a maximum adsorption capacity of 416 mg/g at pH 3. The adsorption process was found to be spontaneous and exothermic with multiple interactions, including electrostatic forces, hydrogen bonding, and π-π stacking, contributing to the high removal efficiency as well. Furthermore, Al-MOAs demonstrated suitable stability and exhibiting outstanding reusability for at least four consecutive adsorption-desorption cycles during DCF removal process. Finally, Al-MOAs considered as a promising adsorbent for the efficient removal of pharmaceutical pollutant in liquid phase and a sustainable solution for wastewater treatment.

双氯芬酸（DCF）是一种非甾体抗炎药（NSAID），其广泛使用导致其在水生环境中持续存在，对人类健康和生态系统构成风险。本研究采用溶胶-凝胶法合成铝基金属有机气凝胶（Al-MOAs），探讨其作为吸附剂对水溶液中DCF的去除效果。理化表征表明，Al-MOAs具有高微孔率、高比表面积（1702.5 m2/g）和优异的机械稳定性。因此，Al-MOAs表现出快速的吸附动力学，在pH为3时的最大吸附量为416 mg/g。吸附过程是自发的、放热的，具有静电力、氢键和π-π堆积等多种相互作用，具有较高的去除效率。此外，在DCF去除过程中，Al-MOAs表现出良好的稳定性，并在至少四个连续的吸附-解吸循环中表现出出色的可重复使用性。最后，Al-MOAs被认为是一种有前途的高效去除液相中药物污染物的吸附剂和废水处理的可持续解决方案。

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引用次数: 0

A heterotrophic nitrification-aerobic denitrification bacterium Acinetobacter sp. WZ-1: the superior stress resistance and the unconventional nitrogen metabolic pathways 异养硝化-好氧反硝化细菌不动杆菌sp. WZ-1：优越的抗逆性和非常规的氮代谢途径

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-09-30 DOI: 10.1016/j.wroa.2025.100422

Hong Wang , Peike Wu , Li Chen , Lan Wang , Dan Zheng , Wenguo Wang , Liangwei Deng

Heterotrophic nitrification-aerobic denitrification (HN-AD) bacteria are outstanding in nitrogen removal for wastewater treatment. In this study, Acinetobacter sp. WZ-1 and Rhodococcus sp. JY-5 were isolated and identified as HN-AD strains. The ¹⁵N isotope experiments demonstrated that WZ-1 and JY-5 both converted inorganic nitrogen to N₂. Compared with JY-5, WZ-1 showed the superior ability on NH₄⁺-N removal under environmental stress. WZ-1 removed 85.15% and 97.06% of NH₄⁺-N at the initial pH values of 5 and 9, respectively. At the high temperature of 40 °C, NH₄⁺-N removal efficiency by WZ-1 still reached to 80.66%. Moreover, high C/N ratios showed the significant inhibition on growth of WZ-1 and JY-5 under alkaline environment. WZ-1 still removed NH₄⁺-N of 47.15–87.68% with the low C/N ratios of 4–8 at pH 9. It indicated the potential of WZ-1 to treat high-ammonia wastewater featured by the high pH values and low C/N ratios. The genome and intermediate products inferred the unconventional nitrification-denitrification pathway of WZ-1 strain (NH₄⁺→NH₂OH→NO→NO₃⁻→NO₂⁻→NO→N₂→N₂). Particularly, nitrate production is attributed to NO oxidation according the hmp gene. Traditional genes for denitrification (narGH, nirKS, norBD and nosZ) were not found in genome, while flavorubredoxins and NosD protein might involve in nitrite/NO reduction and N₂O reduction, respectively. This study proved that certain unreported enzymes and proteins play important roles in nitrogen removal of the unconventional HN-AD bacteria.

异养硝化-好氧反硝化（HN-AD）细菌在污水处理中的脱氮能力突出。本研究分离到不动杆菌sp. WZ-1和红球菌sp. JY-5，鉴定为HN-AD菌株。15N同位素实验表明，WZ-1和JY-5均将无机氮转化为N2。与JY-5相比，WZ-1在环境胁迫下对NH4+-N的去除能力更强。在初始pH值为5和9时，WZ-1对NH4+-N的去除率分别为85.15%和97.06%。在40℃高温下，WZ-1对NH4+-N的去除率仍然达到80.66%。高碳氮比对WZ-1和JY-5在碱性环境下的生长有显著的抑制作用。WZ-1在pH为9时，当C/N为4 ~ 8时，NH4+-N去除率仍为47.15 ~ 87.68%。说明了WZ-1处理高pH值、低碳氮比的高氨废水的潜力。基因组和中间产物推测了WZ-1菌株的非常规硝化-反硝化途径（NH4+→NH2OH→NO→NO3−→NO2−→NO→N2→N2）。特别是，根据hmp基因，硝酸盐的产生归因于NO氧化。基因组中未发现传统的反硝化基因narGH、nirKS、norBD和nosZ，而flavorubredoxins和NosD蛋白可能分别参与亚硝酸盐/NO还原和N2O还原。本研究证实了一些未报道的酶和蛋白在非常规HN-AD菌脱氮过程中发挥重要作用。

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引用次数: 0

Biochar-enhanced anaerobic digestion of sewage sludge: Comparative performance and mechanistic insights 生物炭增强污泥厌氧消化：比较性能和机理的见解

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-09-29 DOI: 10.1016/j.wroa.2025.100423

Zhong-Fang Sun , Shu-Tong Wu , Chuan Chen , Zi-Han Wang , Jing-Yang Tan , Yu-Tong Zhang , Xue-Ting Wang , Shan-Shan Yang , De-Feng Xing , Dong-Mei Liu , Ai-Jie Wang , Nan-Qi Ren , Lei Zhao

Anaerobic digestion (AD) is a sustainable approach for sewage sludge stabilization and energy recovery, but its efficiency is often limited by microbial imbalance and intermediate accumulation. Biochar addition is a promising strategy for enhancing AD, however, the mechanisms underlying its effectiveness, particularly the impact of biochar origin, remain insufficiently understood. This study systematically compared corn stover-derived biochar (CSBC), mixed straw-derived biochar (MSBC), and digested sludge-derived biochar (SSBC) regarding their effects on methane production, microbial community structure, and electron transfer processes in sewage sludge AD. Results revealed that CSBC addition (10 g/L) yielded the most significant enhancement, increasing cumulative methane yield by 122.1 % to 153.7 mL/g VS compared to the control. This superior performance correlated strongly with CSBC's abundant oxygen-containing functional groups (OFGs), which facilitated higher redox activity (k_app 12-15 % greater than SSBC/MSBC) and electron transfer system activity (81.1 % increase over control). Microbial analysis revealed that CSBC was enriched with electron-transferring bacteria (e.g., Bacteroidetes_vadin HA17). Conversely, MSBC primarily facilitated hydrolysis, while SSBC preferentially stimulated hydrogenotrophic methanogens. These findings demonstrate that biochar surface chemistry and electrochemical properties are critical determinants of microbial interactions and methane yield, providing crucial insights for designing tailored biochars to optimize waste valorization and energy recovery in AD. This study offers a unique comparison of straw-versus sludge-derived biochars in sludge AD, highlighting the potential of SSBC in a circular economy context, and underscores the importance of linking biochar properties to functional microbial activity.

厌氧消化（AD）是一种可持续的污泥稳定和能量回收方法，但其效率往往受到微生物不平衡和中间积累的限制。添加生物炭是一种很有前途的增强AD的策略，然而，其有效性的机制，特别是生物炭来源的影响，仍然没有得到充分的了解。本研究系统比较了玉米秸秆衍生生物炭（CSBC）、混合秸秆衍生生物炭（MSBC）和消化污泥衍生生物炭（SSBC）对污泥AD中甲烷生成、微生物群落结构和电子转移过程的影响。结果表明，添加CSBC （10 g/L）对甲烷累积产率的提高最为显著，达到153.7 mL/g VS，较对照提高了122.1%。这种优异的性能与CSBC丰富的含氧官能团（OFGs）密切相关，它促进了更高的氧化还原活性（比SSBC/MSBC高12- 15%）和电子传递系统活性（比对照高81.1%）。微生物学分析显示，CSBC富含电子转移菌（如Bacteroidetes_vadin HA17）。相反，MSBC主要促进水解，而SSBC优先刺激氢营养产甲烷菌。这些发现表明，生物炭的表面化学和电化学性质是微生物相互作用和甲烷产量的关键决定因素，为设计量身定制的生物炭以优化AD中的废物价值和能量回收提供了重要见解。该研究提供了污泥AD中秸秆与污泥衍生生物炭的独特比较，强调了SSBC在循环经济背景下的潜力，并强调了将生物炭特性与功能性微生物活性联系起来的重要性。

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引用次数: 0

Hydrological phase-driven management in semi-arid watersheds: Linking plankton assembly dynamics and adaptive resilience strategies 半干旱流域水文阶段驱动管理：浮游生物聚集动态与适应性恢复策略的联系

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-09-27 DOI: 10.1016/j.wroa.2025.100421

Jingzhi Yu , Guoqiang Wang , Yinglan A , Yi Zhu , Yan Cheng , Zhimao Deng , Ruizhong Gao , Limin Duan

Semi-arid river basins, characterized by pronounced hydrological seasonality and anthropogenic pressures, face escalating threats to aquatic ecosystems under climate change. This study investigated the Dahei River Basin, a critical Yellow River tributary in Inner Mongolia, to unravel the coupled impacts of climate, geology, hydrological pulses and water quality degradation on eukaryotic plankton communities. Using α/β-diversity, dispersal-niche continuum index (DNCI), co-occurrence networks, and Partial Least Squares Path Modeling (PLS-PM) across dry-wet seasons and habitats, key findings emerged: (1) Urban wastewater inputs create multidimensional resource gradients that drive niche expansion in rivers, challenging the conventional paradigm of reservoir-dominated niche variation. (2) Hydrological pulses asymmetrically regulate trophic dynamics: wet-season runoff enhances phytoplankton dispersal, while zooplankton utilize dormant egg banks for resilience. This seasonality also alters network stability, with wet-season connectivity increases cascade risks and dry-season modularity enhances disturbance buffering. (3) The PLS-PM analysis further clarified that alternating wet-dry phases reconfigure ecological pathways. These findings advanced understanding of semi-arid aquatic ecosystems by decoupling phase-specific stressor pathways. Based on these findings, we established a "hydrological phase-responsive framework" (HPRF) that integrates empirical results with management needs for semi-arid watersheds, emphasizing that restoration must dynamically align with wet-dry transitions for ecological integrity in water-scarce regions. This work advances frameworks for balancing ecological integrity and urbanization in water-scarce regions.

气候变化背景下，以水文季节性和人为压力显著为特征的半干旱流域水生生态系统面临日益严重的威胁。本研究以内蒙古黄河重要支流大黑河流域为研究对象，揭示了气候、地质、水文脉动和水质退化对真核浮游生物群落的耦合影响。利用α/β-多样性、分散-生态位连续指数（DNCI）、共生网络和偏最小二乘路径模型（PLS-PM），研究发现：(1)城市污水输入产生了多维资源梯度，推动河流生态位扩展，挑战了水库主导的生态位变化的传统范式。(2)水文脉冲不对称调节营养动力学：雨季径流促进浮游植物扩散，而浮游动物利用休眠卵库增强恢复力。这种季节性也改变了网络的稳定性，雨季的连通性增加了级联风险，旱季的模块化增强了干扰缓冲。(3) PLS-PM分析进一步阐明了干湿交替对生态路径的重构作用。这些发现通过解耦特定阶段的应激源途径，促进了对半干旱水生生态系统的理解。基于这些发现，我们建立了一个“水文阶段响应框架”（HPRF），该框架将经验结果与半干旱流域的管理需求相结合，强调恢复必须动态地与缺水地区的生态完整性干湿过渡保持一致。这项工作推进了在缺水地区平衡生态完整性和城市化的框架。

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引用次数: 0

Mobility data for reduced uncertainties in model-based WWTP design 基于模型的污水处理厂设计中减少不确定性的迁移率数据

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-09-24 DOI: 10.1016/j.wroa.2025.100418

Oscar Samuelsson , Erik U. Lindblom , Kenneth Djupsjö , Linda Kanders , Lluís Corominas

Model-based design is an emerging tool for dealing with the uncertain dynamic loads entering wastewater treatment plants (WWTPs). But our understanding about the load-driving population-dynamics is limited. Therefore, we studied if mobility data (mobile telecommunications data) could be used to reduce uncertainties during design. Mobility data from Uppsala, Sweden between 2019–2022 clearly quantified population movement patterns that were useful for simulating load scenarios such as seasonal load-shifts, without data gaps from irregular influent sampling. Further, they showed fair correlations with the daily influent nitrogen load (R² = 0.49), which resulted in a more precise person load estimate than assuming a static population (23 % reduced variance). Unfortunately, BOD load variations showed little correlation with the population variations (R² = 0.21). Nevertheless, model-based reactor sizing based on mobility data successfully reduced the de-/nitrification volume safety factor with 5 percentage points, which demonstrates their practical usefulness for WWTP design.

基于模型的设计是一种新兴的处理污水处理厂不确定动态负荷的工具。但我们对负荷驱动的种群动态的理解是有限的。因此，我们研究是否可以使用移动性数据（移动通信数据）来减少设计中的不确定性。来自瑞典乌普萨拉（Uppsala）的2019-2022年期间的流动数据清楚地量化了人口流动模式，这对于模拟季节性负荷变化等负荷情景非常有用，没有不规则进水抽样的数据缺口。此外，它们显示出与每日进水氮负荷的公平相关性（R2 = 0.49），这导致比假设静态种群（减少23%方差）更精确的人负荷估计。不幸的是，BOD负荷变化与种群变化的相关性很小（R2 = 0.21）。然而，基于迁移率数据的基于模型的反应器尺寸成功地将脱/硝化体积安全系数降低了5个百分点，这证明了它们在污水处理厂设计中的实际用途。

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引用次数: 0

Application of electrodialysis for nutrient recovery from manure digestate: A long-term investigation of membrane fouling 电渗析技术在粪肥消化池养分回收中的应用：膜污染的长期研究

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-09-23 DOI: 10.1016/j.wroa.2025.100420

Jizhong Meng , Lin Shi , Wenjing Bai , Zhenhu Hu , Lisha Zhen , Akihiko Terada , Xinmin Zhan , Paul Crosson

Nutrient recovery from wastewater is pivotal for sustainable development, particularly in mitigating resource scarcity and environmental pollution. This study investigated the potential of long-term electrodialysis (ED) for nutrient recovery from pig manure digestate with a focus on membrane fouling, which is often overlooked in short-term operations. ED reactors were operated over 1100 h using both heterogeneous and homogeneous ion exchange membranes (IEMs), with a treatment loading of 5000 L of digestate /m². The ED system demonstrated effective desalination, achieving over 80 % recovery of ammonium (NH₄⁺) and 90 % recovery of phosphate (PO₄³⁻), while maintaining high perm-selectivity (>95 %). Membrane analysis revealed significant color darkening and structural deterioration, particularly in heterogeneous anion exchange membranes (AM), which exhibited increased resistance and reduced ion exchange capacity (IEC) after a treatment loading of 3472 L/m². Scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR) confirmed the accumulation of organic matter and the formation of hydrogen bonds on fouled membranes. Cation exchange membranes (CM) demonstrated greater stability and resistance to fouling than AM, with homogeneous CM outperforming their heterogeneous counterparts in maintaining IEC and structural integrity. Despite the increased membrane resistance, the ED system led to efficient nutrient recovery, highlighting the resilience of membrane perm-selectivity. This study highlights the potential of ED for resource recovery and emphasizes the critical role of effective fouling mitigation strategies in ensuring its long-term feasibility in nutrient recovery from high-solid wastewater streams, thereby providing a strong foundation for its practical application.

从废水中回收养分对可持续发展至关重要，特别是在缓解资源短缺和环境污染方面。本研究探讨了长期电渗析（ED）对猪粪消化液中营养物质回收的潜力，并重点研究了在短期操作中经常被忽视的膜污染。采用非均相离子交换膜（IEMs）和非均相离子交换膜（IEMs），在处理负荷为5000 L消化液/m²的条件下，ED反应器运行超过1100 h。ED系统证明了有效的海水淡化，铵（NH₄+）和磷酸盐（PO₄³）的回收率超过80%，同时保持了高的热选择性（> 95%）。膜分析显示，在处理负荷为3472 L/m²后，膜的颜色明显变暗，结构明显恶化，特别是在非均相阴离子交换膜（AM）中，表现出抗性增加和离子交换容量（IEC）降低。扫描电镜（SEM）和傅里叶变换红外光谱（FTIR）证实了污染膜上有机物的积累和氢键的形成。阳离子交换膜（CM）表现出比AM更大的稳定性和抗污染能力，均相CM在保持IEC和结构完整性方面优于非均相CM。尽管增加了膜阻力，ED系统导致了有效的营养物质回收，突出了膜的选择性。本研究强调了ED在资源回收方面的潜力，并强调了有效的污染缓解策略在确保其在高固废水流中养分回收的长期可行性方面的关键作用，从而为其实际应用提供了坚实的基础。

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引用次数: 0

Full-scale mainstream partial nitritation/anammox process: A three-year demonstration for municipal wastewater treatment 大规模主流部分硝化/厌氧氨氧化工艺：三年城市污水处理示范

IF 8.2 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research X

Pub Date : 2025-09-22 DOI: 10.1016/j.wroa.2025.100419

Shujun Zhang , Quan Li , Pengchao Gu , Xintao Lv , Xiaoyu Han , Kun Li , Zhibin Wang , Zhiming Qu , Jialin Li , Cong Wang , Yu Bai , Rongbing Zhang , Ye Li , Liang Zhang , Yongzhen Peng

Mainstream partial nitritation/anammox (PN/A) is recognized as a promising method for sustainable nitrogen removal from wastewater. However, its practical implementation remains challenging to date. In this study, a full-scale mainstream partial-nitritation activated sludge system, coupled with an anammox fixed-film (PN-AF) process, has been developed to treat municipal wastewater. The process was initiated by inoculating fixed biofilm with a mature anammox consortium sourced from a side-stream PN/A. The integrated application of chemical inhibition and ecological niche selection was practically implemented in engineering for the first time, enabling the PN-AF process to achieve two years of continuous operation within a wide temperature range (11.6–28.9 °C). The average total nitrogen (TN) removal efficiency was 91.8 ± 4.6 %, with an average effluent TN concentration of 4.5 ± 2.3 mg/L and a nitrogen removal rate of 0.072 ± 0.01 kg N·m⁻³·d⁻¹. Molecular analysis revealed a remarkably high relative abundance of Candidatus Brocadia (17.87 %), accompanied by an eight times higher activity of anammox than that of denitrification. Overall, this work presents a reliable mainstream partial nitritation/anammox process for sustainable wastewater treatment.

主流部分硝化/厌氧氨氧化（PN/A）是一种很有前途的污水可持续脱氮方法。然而，它的实际执行至今仍然具有挑战性。在本研究中，开发了一种大规模主流部分硝化活性污泥系统，结合厌氧氨氧化固定膜（PN-AF）工艺处理城市污水。该工艺是通过用来自侧流PN/ a的成熟厌氧氨氧化联合体接种固定生物膜启动的。首次在工程上实际实现了化学抑制和生态位选择的综合应用，使PN-AF工艺在11.6 ~ 28.9℃的宽温度范围内实现了两年的连续运行。总氮（TN）平均去除率为91.8±4.6%，出水TN平均浓度为4.5±2.3 mg/L，氮去除率为0.072±0.01 kg N·m−3·d−1。分子分析表明，Brocadia菌相对丰度极高（17.87%），厌氧氨氧化活性比反硝化活性高8倍。总的来说，这项工作提出了一种可靠的主流部分硝化/厌氧氨氧化工艺，用于可持续的废水处理。

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引用次数: 0