Water Science & Technology最新文献_第2页

Hotspot analysis for integrated multi-infrastructure asset management 多基础设施综合资产管理的热点分析

Water Science & Technology Pub Date : 2024-07-22 DOI: 10.2166/wst.2024.248

Shamsuddin Daulat, B. Roghani, M. Rokstad, F. Tscheikner-Gratl

{"title":"Hotspot analysis for integrated multi-infrastructure asset management","authors":"Shamsuddin Daulat, B. Roghani, M. Rokstad, F. Tscheikner-Gratl","doi":"10.2166/wst.2024.248","DOIUrl":"https://doi.org/10.2166/wst.2024.248","url":null,"abstract":"\u0000 Urban infrastructure, important for societal functioning, faces challenges from aging assets and increasing service demands. Traditional asset management practices, often conducted in silos, fail to address the interconnected nature of these systems, leading to inefficiencies and heightened system failure risks. This article combines the spatial and temporal aspects of sewer, water, and road networks to facilitate integrated interventions and enable informed decision-making among diverse stakeholders. The outcome of this research is the creation of interactive hotspot maps on a unified platform, highlighting potential areas for integrated intervention across different infrastructures. To enhance the potential for collaboration in integrated interventions, flexibility in intervention planning was incorporated. With increased flexibility in intervention decisions, the potential for collaboration also increased. For the case study, introducing a 5-year intervention flexibility increased the number of collaborative projects between sewer, water, and roads from 0 to 18. The maps can also indicate areas where the application of trenchless technologies are justifiable. Other important information on asset characteristics for the decision-makers, including age, inspection, deterioration, and other relevant spatial and temporal details can also be obtained from the maps. The presented methodology and findings provide practical solution for utilities to manage urban infrastructure networks more efficiently.","PeriodicalId":505935,"journal":{"name":"Water Science & Technology","volume":"31 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141816950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Source separation and anaerobic co-digestion of blackwater and food waste for biogas production and nutrient recovery 对黑水和厨余进行源头分离和厌氧协同消化，以生产沼气和回收营养物质

Water Science & Technology Pub Date : 2024-07-22 DOI: 10.2166/wst.2024.251

Donya Kamravamanesh, M. Kokko

{"title":"Source separation and anaerobic co-digestion of blackwater and food waste for biogas production and nutrient recovery","authors":"Donya Kamravamanesh, M. Kokko","doi":"10.2166/wst.2024.251","DOIUrl":"https://doi.org/10.2166/wst.2024.251","url":null,"abstract":"\u0000 \u0000 Anaerobic co-digestion of source-separated blackwater (BW) and food and kitchen waste (FW) offers decentralized circular economy solutions by enabling local production of biogas and nutrient-rich byproducts. In this study, a 2 m3 pilot-scale continuously stirred tank reactor (CSTR) operated under mesophilic conditions was utilized for co-digestion of BW and FW. The process obtained a CH4 yield of 0.7 ± 0.2 m3/kg influent-volatile solid (VS), reaching a maximum yield of 1.1 ± 0.1 m3/kg influent-VS, with an average organic loading rate of 0.6 ± 0.1 kg-VS/m3/d and HRT of 25 days. The CH4 production rate averaged 0.4 ± 0.1 m3/m3/d, peaking at 0.6 ± 0.1 m3/m3/d. Treatment of digestate through flocculation followed by sedimentation recovered over 90% of ammonium nitrogen and potassium, and 80–85% of total phosphorus in the liquid fraction. This nutrient-rich liquid was used to cultivate Chlorella vulgaris, achieving a biomass concentration of 1.2 ± 0.1 g/L and 85 ± 3% and 78 ± 5% ammonium nitrogen and phosphorus removal efficiency, respectively. These findings not only highlight the feasibility of anaerobic co-digestion of source-separated BW and FW in local biogas production but also demonstrate the potential of microalgae cultivation as a sustainable approach to converting digestate into nutrient-rich algae biomass.","PeriodicalId":505935,"journal":{"name":"Water Science & Technology","volume":"18 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141815838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soft sensor for the dry solid content in thickened primary sludge 用于检测浓缩初级污泥中干固体含量的软传感器

Water Science & Technology Pub Date : 2024-07-22 DOI: 10.2166/wst.2024.249

Hanna Molin, Eric Bröndum, Sara Nilsson, Per Mattson, R. Saagi, E. Lindblom, Bengt Carlsson, Ulf Jeppsson

引用次数: 0

Toward carbon neutrality and circular economy: an innovative combination of enhanced biogas production and nutrient recovery from sludge dewatering liquor at a municipal wastewater treatment plant in Germany 实现碳中和与循环经济：德国一家城市污水处理厂创新性地将沼气生产和污泥脱水液营养回收结合起来

Water Science & Technology Pub Date : 2024-07-20 DOI: 10.2166/wst.2024.247

A. Kleyböcker, Fabian Kraus, Stefanie Meyer, Janina Heinze, Franziska Gromadecki, Christian Remy

{"title":"Toward carbon neutrality and circular economy: an innovative combination of enhanced biogas production and nutrient recovery from sludge dewatering liquor at a municipal wastewater treatment plant in Germany","authors":"A. Kleyböcker, Fabian Kraus, Stefanie Meyer, Janina Heinze, Franziska Gromadecki, Christian Remy","doi":"10.2166/wst.2024.247","DOIUrl":"https://doi.org/10.2166/wst.2024.247","url":null,"abstract":"\u0000 \u0000 An innovative circular economy (CE) system was implemented at the wastewater treatment plant (WWTP) in Brunswick. The performance of the CE system was evaluated for 4 years: the thermal pressure hydrolysis enhanced the methane production by 18% and increased the digestate dewaterability by 14%. Refractory COD formed in thermal hydrolysis and increased the COD concentration in the WWTP effluent by 4 mg L−1 while still complying with the legal threshold. Struvite production reached high phosphorus recovery rates of >80% with a Mg:P molar ratio ≥0.8. Nitrogen was successfully recovered as ammonium sulfate with high recovery rates of 85–97%. The chemical analyses of secondary fertilizers showed a low pollutant content, posing low risks to soil and groundwater ecosystems. The total carbon footprint of the WWTP decreased due to enhanced biogas production, the recovery of renewable fertilizers and a further reduction of nitrous oxide emissions. Using green energy will be crucial to reach carbon neutrality for the entire WWTP.","PeriodicalId":505935,"journal":{"name":"Water Science & Technology","volume":"113 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141820406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cation interception and permeability characteristics of bentonite barriers exposed to NaCl and NH4Cl solutions 暴露于 NaCl 和 NH4Cl 溶液中的膨润土屏障的阳离子拦截和渗透特性

Water Science & Technology Pub Date : 2024-07-16 DOI: 10.2166/wst.2024.241

Wen-jing Sun, Qian-tong Tang, Ri-dong Fan, Ai-wu Yang, Yun-zi Tan, Anthony Kwan Leung

引用次数: 0

Phosphorous recovery potential from sewage sludge by struvite precipitation: remodelling policy framework in Rajasthan, India 通过硬石膏沉淀从污水污泥中回收磷的潜力：印度拉贾斯坦邦政策框架的重塑

Water Science & Technology Pub Date : 2024-07-16 DOI: 10.2166/wst.2024.243

Ankit Srivastava, K. Saxena, U. Brighu

{"title":"Phosphorous recovery potential from sewage sludge by struvite precipitation: remodelling policy framework in Rajasthan, India","authors":"Ankit Srivastava, K. Saxena, U. Brighu","doi":"10.2166/wst.2024.243","DOIUrl":"https://doi.org/10.2166/wst.2024.243","url":null,"abstract":"\u0000 \u0000 The manufacturing of fossil-based fertilizers by extraction of rock phosphate has contributed to carbon emissions and depleted the non-renewable phosphorous reserves. Sewage sludge, which is a waste product from sewage treatment plants (STPs), is rich in phosphorous. The existing techniques for sludge management contribute to carbon emissions and ecological footprint. Struvite (raw fertilizer) and biochar recovery from sludge have emerged as viable methods to reduce carbon emissions and ensure the economic sustainability of STPs. In this work, the potential for phosphorous recovery and revenue generation is discussed for Rajasthan state in India. The fate of phosphorous and heavy metals in STPs is evaluated which indicates that about 70% of the phosphorous and trace amounts of metals end up in sewage sludge. Further, the power consumption is high in STPs due to industrial wastewater ingress. There is a need to bridge the gap between sewage treatment and generation in Rajasthan and improve STP performance before resource recovery inclusion at policy-level and scale-up. Mixing struvite with biochar can lead to the safe application of struvite as raw fertilizer as heavy metals are sequestered by biochar. A business framework is developed to serve as a blueprint and potential model for linking technical and market viability.","PeriodicalId":505935,"journal":{"name":"Water Science & Technology","volume":"9 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141644224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New understanding of the main active substances and the promotion mechanism in the degradation of phenol by Fe–C micro-electrolysis systems 对Fe-C微电解系统降解苯酚的主要活性物质和促进机制的新认识

Water Science & Technology Pub Date : 2024-07-16 DOI: 10.2166/wst.2024.244

Yulong Zou, Haiqian Zhao, Xiaolong Zhang, Zhonghua Wang, Xue Yang, Xing Zhang

{"title":"New understanding of the main active substances and the promotion mechanism in the degradation of phenol by Fe–C micro-electrolysis systems","authors":"Yulong Zou, Haiqian Zhao, Xiaolong Zhang, Zhonghua Wang, Xue Yang, Xing Zhang","doi":"10.2166/wst.2024.244","DOIUrl":"https://doi.org/10.2166/wst.2024.244","url":null,"abstract":"\u0000 \u0000 The mechanism of phenol degradation by micro-electrolytic systems can be fully understood by evaluating the oxidation of active substances from the two aspects of phenol bond-breaking and mineralization, and the direction of promoting the generation of active substances is pointed out. In this article, the effects of H2O2, O2-•, ·OH and 1O2 in the degradation of phenol were analyzed using phenol and chemical oxygen demand (COD) removal rates as judgment indicators, respectively. And the addition of C6O8H6 to the micro-electrolysis system was adopted to promote the generation of active substances. The experimental results showed that the active substances which played a dominant effect in the process of phenol bond-breaking and mineralization were changed. While 1O2 is dominant in the bond-breaking of phenol, •OH is dominant in the mineralization of phenol. After adding C6O8H6 (1 mmol/L), the removal rates of phenol and COD were increased by 7.35 and 4.85%, respectively. This was attributed to the autoxidation reaction of C6O8H6 and the continuous supply of H+ while reducing Fe3+ to Fe2+. Additionally, the C6O8H6 regulated the reaction pathway to improve the utilization of H2O2. This study provides a new perspective for the understanding of active substances in micro-electrolysis systems.","PeriodicalId":505935,"journal":{"name":"Water Science & Technology","volume":"1 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141640687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nano-silica modified with silane and fluorinated chemicals to prepare a superhydrophobic coating for enhancing self-cleaning performance 用硅烷和含氟化学品改性纳米二氧化硅，制备超疏水涂层，提高自清洁性能

Water Science & Technology Pub Date : 2024-07-16 DOI: 10.2166/wst.2024.240

Guisheng Zeng, B. Gong, Yingpeng Li, Kun Wang, Qian Guan

{"title":"Nano-silica modified with silane and fluorinated chemicals to prepare a superhydrophobic coating for enhancing self-cleaning performance","authors":"Guisheng Zeng, B. Gong, Yingpeng Li, Kun Wang, Qian Guan","doi":"10.2166/wst.2024.240","DOIUrl":"https://doi.org/10.2166/wst.2024.240","url":null,"abstract":"\u0000 \u0000 Superhydrophobic coatings with excellent self-cleaning performance have attracted significant concerns from researchers. Although various superhydrophobic coatings with prominent superhydrophobic properties have been fabricated, most developed coatings are still inadequate in pipeline scale inhibition applications. In this work, nano-silica (nano-SiO2) was modified by silane coupling of vinyltriethoxysilane (VETS) and 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (PFTS) to prepare a superhydrophobic coating. Organosilicon of PFTS and VETS was grafted onto the surface of SiO2 for preparing the superhydrophobic coating with low surface energy, and the superhydrophobic coating was cured via poly(vinylidene fluoride) (PVDF). The results showed that the contact angle of the prepared silica-based superhydrophobic coating, denoted as VETS-PFTS@SiO2/PVDF, is 159.2°, exhibiting outstanding superhydrophobicity performance. Furthermore, the superhydrophobicity coating also showed satisfactory durability performance in 200 g load wear test after 50 cycles. Importantly, the superhydrophobic coating displayed promising mechanical durability, chemical stability performance, as well as maintained excellent superhydrophobic properties after being placed in water for 3 weeks, indicating the potential for long-term utilization. In the simulated scale inhibition test, it was found that the synthesized coating can also significantly decrease the deposition rate of CaCO3 and successfully enhance its scale inhibition performance.","PeriodicalId":505935,"journal":{"name":"Water Science & Technology","volume":"8 39","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141640289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the membrane bioreactor efficiency: the impact of rotating membrane modules and aeration strategies on the transmembrane pressure 提高膜生物反应器的效率：旋转膜组件和曝气策略对跨膜压力的影响

Water Science & Technology Pub Date : 2024-07-16 DOI: 10.2166/wst.2024.242

Fathul Mahdariza, Wilhelm Georg, Henri Pronold, T. Morck

引用次数: 0

Soft sensor for substrate characterization through the reverse application of the ADM1 model for anaerobic digestion plant operations 通过将 ADM1 模型反向应用于厌氧消化设备运行，实现基质表征的软传感器

Water Science & Technology Pub Date : 2024-07-15 DOI: 10.2166/wst.2024.239

F. Zorrilla, M. C. Sadino-Riquelme, Felipe Hansen, Andrés Donoso-Bravo

引用次数: 0

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