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Going from energy efficiency to climate neutrality on the way to decarbonizing the wastewater sector 从能源效率到气候中和,实现污水处理领域的去碳化
Pub Date : 2024-10-03 DOI: 10.1038/s44221-024-00322-6
Maria Salvetti
Reducing carbon emission in the wastewater treatment sector requires both lower energy consumption and a transition towards renewable energy sources. Utilizing the embedded energy in wastewater, which has been traditionally overlooked, could be a substantial additional step towards achieving carbon neutrality.
要减少废水处理行业的碳排放,既要降低能耗,又要向可再生能源过渡。利用废水中传统上被忽视的内含能源,可以在实现碳中和的道路上再迈出一大步。
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引用次数: 0
Brine concentration at ambient conditions using ion exchange 利用离子交换技术在环境条件下浓缩盐水
Pub Date : 2024-10-03 DOI: 10.1038/s44221-024-00319-1
Treavor H. Boyer
A two-step process of water uptake by ion-exchange resin followed by evaporation can concentrate brine solutions without the need for heating.
离子交换树脂吸水后蒸发的两步法可以浓缩盐水溶液,而无需加热。
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引用次数: 0
New approach to progress development of hybrid urban water systems 推进城市混合供水系统发展的新方法
Pub Date : 2024-10-03 DOI: 10.1038/s44221-024-00317-3
Jurg Keller
With ever growing challenges, our urban water systems will need to adapt and change significantly in coming years. A new tool is now available to evaluate a wide range of diversified and decentralized solutions, including their costs and benefits, to improve sustainability and resilience of our cities.
面对日益严峻的挑战,我们的城市供水系统需要在未来几年做出重大调整和改变。现在有了一种新工具,可用于评估各种多样化和分散的解决方案,包括其成本和效益,以提高我们城市的可持续性和复原力。
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引用次数: 0
Accelerated low-temperature, low-fouling brine concentration through evaporative ion exchange mediated by the effect of functional groups 在官能团效应的介导下,通过蒸发离子交换加速低温低垢盐水浓缩
Pub Date : 2024-10-03 DOI: 10.1038/s44221-024-00305-7
Hao Chen, Arup K. SenGupta
Achieving brine concentration by membrane distillation or the various humidification–dehumidification processes that are currently available always requires a thermal energy input and an elevated temperature. In this study, we developed a brine concentration process mediated by the unique osmotic and evaporation properties of high-capacity ion exchange resins. The evaporative ion exchange process consists of two steps. First, when a concentrated salt solution is brought into contact with a relatively dry, high-capacity polymeric ion exchanger, water selectively permeates into the ion exchanger phase through osmosis and the resin swells. In the second step, water evaporates when the swollen ion exchanger is brought into contact with air with low relative humidity and the resin shrinks. Here we show that, with hypersaline produced water from Marcellus gas shale, this evaporative ion exchange process attained total dissolved solids greater than 400,000 mg l−1, leading to the precipitation/crystallization of barium and sodium chloride at ambient temperature without causing any fouling of the ion exchange resins. The evaporative ion exchange process developed in this study achieves brine concentration at ambient temperature without fouling, providing a non-thermal brine concentration technology towards zero liquid discharge.
通过膜蒸馏或现有的各种加湿-除湿工艺实现盐水浓缩,始终需要热能输入和较高的温度。在这项研究中,我们利用高容量离子交换树脂独特的渗透和蒸发特性,开发了一种盐水浓缩工艺。蒸发离子交换过程包括两个步骤。首先,当浓盐溶液与相对干燥的高容量聚合物离子交换树脂接触时,水通过渗透作用选择性地渗入离子交换树脂相,树脂膨胀。在第二步中,当膨胀的离子交换剂与相对湿度较低的空气接触时,水分蒸发,树脂收缩。在这里,我们展示了在使用马塞勒斯页岩气的高盐度产水时,这种蒸发离子交换工艺可使溶解固体总量超过 400,000 毫克/升,从而在环境温度下沉淀/结晶出氯化钡和氯化钠,而不会造成离子交换树脂的任何污垢。本研究开发的蒸发离子交换工艺可在常温下实现盐水浓缩,且不会造成结垢,为实现零液体排放提供了一种非热盐水浓缩技术。
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引用次数: 0
Let the Olympics serve as warning for water quality 让奥运为水质敲响警钟
Pub Date : 2024-10-03 DOI: 10.1038/s44221-024-00324-4
Hong Yang
Water pollution in the Seine and Thames rivers underscores the urgent need for unified and global action. As climate change intensifies, outdated infrastructure and reactive measures fall short. We must adopt proactive strategies, improve wastewater treatment, and implement nature-based solutions.
塞纳河和泰晤士河的水污染凸显了采取全球统一行动的迫切需要。随着气候变化的加剧,陈旧的基础设施和被动的应对措施都无法解决问题。我们必须采取积极主动的策略,改善废水处理,并实施基于自然的解决方案。
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引用次数: 0
Universal microbial indicators provide surveillance of sewage contamination in harbours worldwide 通用微生物指标可监测全球港口的污水污染情况
Pub Date : 2024-10-03 DOI: 10.1038/s44221-024-00315-5
Sandra L. McLellan, Anthony Chariton, Annachiara Codello, Jill S. McClary-Gutierrez, Melissa K. Schussman, Ezequiel M. Marzinelli, Judith M. O’Neil, Eric J. Schott, Jennifer L. Bowen, Joe H. Vineis, Lois Maignien, Clarisse Lemonnier, Morgan Perennou, Karen S. Gibb, Guang-Jie Zhou, Kenneth M. Y. Leung, Marek Kirs, John F. Griffith, Joshua A. Steele, Stephen E. Swearer, Allyson L. O’Brien, Dehai Song, Shengkang Liang, Junfeng Li, Laura Airoldi, Francesco P. Mancuso, Paulo S. Salomon, Arthur W. Silva-Lima, Renato C. Pereira, Alexandria B. Boehm, Elton W. X. Lim, Stefan Wuertz, Emilio Fernández, Eva Teira, Ming-Ling Liao, Yun-Wei Dong, Peter D. Steinberg
Human population pressures and activities pose unprecedented challenges to water resources in urban environments. However, standard methods of assessing microbial water quality have relied on the same cultured organisms for decades. We show that there is a conserved microbial assemblage in untreated sewage that can be exploited to improve global sewage surveillance. Among harbour and coastal water samples from 18 cities across 5 continents (n = 442), nearly half had evidence of sewage contamination using two human faecal bacteria as molecular indicators. In contrast, conventional measures using cultured Escherichia coli or enterococci only exceeded water quality limits in ~18% of samples, with less than half of these demonstrating sewage indicators. Contaminated locations also displayed a signature characteristic of microorganisms mainly derived from sewer infrastructure. Given the human health risk, loss of ecosystem services and economic costs associated with contaminated coastal waters, molecular approaches could provide more reliable information on sewage contamination of urban waterways. Assessing microbial water quality is an important approach to monitor potential risks to human and environmental health. The use of two human faecal bacteria as molecular indicators is shown to be more sensitive than conventional measures for detecting contamination on an extensive set of data.
人类的人口压力和活动给城市环境中的水资源带来了前所未有的挑战。然而,几十年来,评估微生物水质的标准方法一直依赖于相同的培养生物。我们的研究表明,在未经处理的污水中存在一种保守的微生物组合,可以利用它来改善全球污水监测。在来自五大洲 18 个城市的港口和沿海水样(n = 442)中,有近一半的水样以两种人类粪便细菌作为分子指标,证明受到了污水污染。相比之下,使用培养的大肠杆菌或肠球菌进行常规测量,只有约 18% 的样本水质超标,其中只有不到一半的样本显示出污水指标。受污染地点还显示出主要来自下水道基础设施的微生物特征。鉴于沿岸水域污染对人类健康造成的风险、生态系统服务的损失和经济成本,分子方法可以提供有关城市水道污水污染的更可靠信息。评估微生物水质是监测人类和环境健康潜在风险的重要方法。在大量数据中,使用两种人类粪便细菌作为分子指标,在检测污染方面比传统方法更灵敏。
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引用次数: 0
Pseudo-continuous and scalable electrochemical ion pumping with circuit-switching-induced ion shuttling 利用电路切换诱导离子穿梭的伪连续和可扩展电化学离子泵
Pub Date : 2024-10-01 DOI: 10.1038/s44221-024-00312-8
Longqian Xu, Weifan Liu, Xudong Zhang, Wei Tang, Dong-Ju Lee, Zezhou Yang, Zheng Chen, Shihong Lin
Despite the potential of electrosorption to address many challenges in sustainability at the water–energy–food nexus, the performance of conventional electrosorption is hindered by the technical limitations associated with the need to switch solutions in the flow channels between the charging and discharging half-cycles. Here we show that electrochemical ion pumping (EIP), powered by the mechanism of ion shuttling induced by circuit switching, offers a highly scalable approach to overcome the limitations of solution switching and achieve pseudo-continuous ion separation with unidirectional ion flux. We demonstrate the feasibility of EIP with symmetric and asymmetric configurations and report a systematic investigation of symmetric EIP with both a single electrode and multiple electrodes. We unveil interesting system behaviours of multi-electrode EIP that are critical to scaling up EIP for practical applications. We also show salient performance enhancement of EIP compared with conventional electrosorption using various types of configurations for brackish water desalination. In addition to its exceptional scalability and performance, the ability of EIP to operate with ultrashort half-cycles with minimum capacitance has a strong potential to shift the paradigm of system and electrode design in a broad range of electrochemical separation applications. Unlike solution switching in conventional electrosorption, electrochemical ion pumping achieves ion separation via circuit switching, enabling pseudo-continuous desalination with a unidirectional ion flux and a very high frequency of charging and discharging.
尽管电吸附技术有潜力解决水-能源-食品关系中的许多可持续性挑战,但由于需要在充电和放电半周期之间切换流道中的溶液,传统电吸附技术的性能受到了技术限制。在这里,我们展示了电化学离子泵(EIP),它以电路切换引起的离子穿梭机制为动力,提供了一种高度可扩展的方法,克服了溶液切换的限制,实现了单向离子流的伪连续离子分离。我们证明了对称和非对称配置 EIP 的可行性,并报告了对单电极和多电极对称 EIP 的系统研究。我们揭示了多电极 EIP 的有趣系统行为,这些行为对于扩大 EIP 的实际应用至关重要。我们还展示了 EIP 与传统电吸附相比在咸水淡化方面的显著性能提升,它采用了各种类型的配置。除了出色的可扩展性和性能之外,EIP 还能在电容最小的情况下以超短半周期运行,因此极有可能在广泛的电化学分离应用中改变系统和电极的设计模式。与传统电吸附中的溶液切换不同,电化学离子泵通过电路切换实现离子分离,从而以单向离子通量和极高的充放电频率实现伪连续脱盐。
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引用次数: 0
Valuing energy flexibility from water systems 评估水系统的能源灵活性
Pub Date : 2024-09-27 DOI: 10.1038/s44221-024-00316-4
Akshay K. Rao, Jose Bolorinos, Erin Musabandesu, Fletcher T. Chapin, Meagan S. Mauter
Water systems represent an untapped source of electric power load flexibility, but determining the value of this flexibility requires quantitative comparisons to other grid-scale energy storage technologies and a compelling economic case for water system operators. Here we present a unified framework for representing water asset flexibility using grid-scale energy storage metrics (round-trip efficiency, energy capacity and power capacity) and assessing the technoeconomic benefits of energy flexibility at the water facility scale (levelized cost of water and levelized value of flexibility). We apply this framework to case studies of an advanced water treatment (desalination) plant, a water distribution network and a wastewater treatment plant. The framework reveals strengths and limitations of water system flexibility relative to other grid-scale energy storage solutions, high-value opportunities for flexible load operation of water assets and the critical role of electricity tariff structures and energy service markets in determining water sector participation in load flexibility. Ultimately, this unified framework for valuating water asset flexibility enables both electricity and water asset managers to prioritize investments based on levelized cost comparisons across their respective portfolios. This Article introduces a framework to assess water systems as potential sources of energy flexibility using energy storage metrics and levelized costs. Through case studies of a desalination plant, a water distribution network and a wastewater treatment plant, it explores the benefits and challenges of flexible load operation, highlighting how electricity tariffs may influence facility investment decisions.
水利系统是一个尚未开发的电力负荷灵活性来源,但确定这种灵活性的价值需要与其他电网规模的储能技术进行定量比较,并为水利系统运营商提供有说服力的经济案例。在此,我们提出了一个统一的框架,利用电网规模的储能指标(往返效率、能量容量和功率容量)来表示水利资产的灵活性,并评估水利设施规模的能源灵活性的技术经济效益(水的平准化成本和灵活性的平准化价值)。我们将这一框架应用于先进水处理(海水淡化)厂、输水管网和污水处理厂的案例研究。该框架揭示了水系统灵活性相对于其他电网规模储能解决方案的优势和局限性、水资产灵活负荷运行的高价值机会,以及电价结构和能源服务市场在决定水行业参与负荷灵活性方面的关键作用。最终,这一用于评估水资产灵活性的统一框架使电力和水资产管理者能够根据各自投资组合的平准化成本比较来确定投资的优先次序。本文介绍了一个利用储能指标和平准化成本评估水系统作为潜在能源灵活性来源的框架。通过对海水淡化厂、配水管网和污水处理厂的案例研究,文章探讨了灵活负荷运行的益处和挑战,强调了电价如何影响设施投资决策。
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引用次数: 0
Global scale exploration of human faecal and sewage resistomes as a function of socio-economic status 作为社会经济地位函数的人类粪便和污水抗微生物全球规模探索
Pub Date : 2024-09-24 DOI: 10.1038/s44221-024-00310-w
Suraj Gupta, Xiaowei Wu, Amy Pruden, Liqing Zhang, Peter Vikesland
Prior studies have shown that socio-economic indicators collectively explain most of the variance in sewage resistomes. However, the relationship between human faecal and sewage resistomes has not been well characterized. We investigated common and discriminating features between human faecal and sewage microbiomes and resistomes by analysing 451 publicly available metagenomic samples from 69 countries (240 human faecal samples from 23 countries and 211 urban sewage samples from 60 countries) representing different socio-economic statuses. We found that sewage and human faecal resistome compositions were distinct, with sewage exhibiting higher relative antibiotic resistance gene abundance and total diversity than human faeces. The ANOSIM test revealed stronger separation by socio-economic status in sewage samples (R = 0.47) compared to faecal samples (R = 0.17). The distinctions between human faecal and sewage resistomes revealed in this study are key considerations in the advancement of sewage surveillance efforts aimed at informing the antibiotic resistance status of human populations. Extensive comparisons of human faecal and sewage resistomes provide essential insights into the differences between these resistomes and their relationship with socio-economic factors.
先前的研究表明,社会经济指标共同解释了污水耐药性的大部分差异。然而,人类粪便和污水抗性组之间的关系还没有得到很好的描述。我们通过分析来自 69 个国家的 451 份公开元基因组样本(240 份人类粪便样本来自 23 个国家,211 份城市污水样本来自 60 个国家),研究了代表不同社会经济状况的人类粪便和污水微生物组和抗微生物组之间的共同特征和区别特征。我们发现,污水和人类粪便的耐药性基因组组成各不相同,污水的相对抗生素耐药性基因丰度和总多样性均高于人类粪便。ANOSIM 检验显示,与粪便样本(R = 0.17)相比,污水样本(R = 0.47)中社会经济地位的差异更大。本研究揭示的人类粪便和污水耐药性组之间的区别是推进污水监测工作的关键因素,旨在为人类群体的抗生素耐药性状况提供信息。对人类粪便和污水耐药基因组进行广泛比较,有助于深入了解这些耐药基因组之间的差异及其与社会经济因素的关系。
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引用次数: 0
Ecohydrological resilience and the landscape water storage continuum in droughts 干旱时的生态水文恢复力和景观蓄水连续体
Pub Date : 2024-09-19 DOI: 10.1038/s44221-024-00300-y
Doerthe Tetzlaff, Hjalmar Laudon, Shuxin Luo, Chris Soulsby
Improved quantification of the three-dimensional water storage continuum in the subsurface of intermediate-sized catchments is a prerequisite to improving both ecohydrological and societal resilience to droughts.
改进对中型集水区地下三维储水连续体的量化,是提高生态水文和社会抗旱能力的先决条件。
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引用次数: 0
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Nature water
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