Water Science and Technology最新文献_第10页

Factorial experiment to identify two-way interactions between temperature, harvesting period, hydraulic retention time, and light intensity that influence the biomass productivity and phosphorus removal efficiency of a microalgae-bacteria biofilm. 通过因子实验，确定温度、收割期、水力停留时间和光照强度之间的双向交互作用对微藻-细菌生物膜的生物量生产率和除磷效率的影响。

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-12-01 Epub Date: 2024-11-09 DOI: 10.2166/wst.2024.367

Jacob Dean Watkins, Clayton Jack Lords, Abiela Meek Bradley, David Richard Cutler, Ronald Charles Sims

{"title":"Factorial experiment to identify two-way interactions between temperature, harvesting period, hydraulic retention time, and light intensity that influence the biomass productivity and phosphorus removal efficiency of a microalgae-bacteria biofilm.","authors":"Jacob Dean Watkins, Clayton Jack Lords, Abiela Meek Bradley, David Richard Cutler, Ronald Charles Sims","doi":"10.2166/wst.2024.367","DOIUrl":"https://doi.org/10.2166/wst.2024.367","url":null,"abstract":"Rotating algae biofilm reactors (RABRs) can reduce energy requirements for wastewater reclamation but require further optimization for implementation at water resource recovery facilities (WRRF). Optimizing RABR operation is challenging because conditions at WRRF change frequently, and disregarding interaction terms related to these changes can produce incorrect conclusions about RABR behavior. This study evaluated the two-way interaction and main effects of four factors on the biomass productivity and phosphorus removal efficiency of a microalgae-bacteria biofilm grown in municipal anaerobic digester centrate, with factor levels and operating conditions selected to mimic a pilot RABR at a WRRF in Utah. Two-way interactions harvesting period*light intensity (LI), harvesting period*temperature, and LI*hydraulic retention time (HRT) had significant effects on biomass productivity: at high temperature and low LI, highest biomass productivity was achieved with a 14-day harvesting period, but at medium temperature and high LI, highest biomass productivity was achieved with a 7-day harvesting period. At high HRT, highest biomass productivity occurred at low LI, but at low HRT, highest biomass productivity occurred at high LI. Phosphorus removal was strongly influenced by LI and occurred most rapidly during the first 2 days HRT, which suggests precipitation contributed significantly to phosphorus removal. These observations provide insight for further RABR optimization.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"90 11","pages":"2961-2977"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of low temperature on the microbial community of MBBR filler biofilm. 低温对MBBR填料生物膜微生物群落的影响。

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-12-01 Epub Date: 2024-12-12 DOI: 10.2166/wst.2024.391

Xiaoxiao Zhu, Wenjie Chang, Yu Kong, Ying Cai, Zhaoming Huang, Tianqi Wu, Miao Zhang, Huijun Nie, Yuan Wang

{"title":"Effects of low temperature on the microbial community of MBBR filler biofilm.","authors":"Xiaoxiao Zhu, Wenjie Chang, Yu Kong, Ying Cai, Zhaoming Huang, Tianqi Wu, Miao Zhang, Huijun Nie, Yuan Wang","doi":"10.2166/wst.2024.391","DOIUrl":"https://doi.org/10.2166/wst.2024.391","url":null,"abstract":"Moving bed biofilm reactors can purify urban domestic sewage through microbial biodegradation. High-throughput sequencing was used to study the response mechanism of the biofilm microbial community to temperature. The effluent quality of the reactor declined with the decrease in temperature. Proteobacteria, Bacteroidota, and Nitrospirota were the dominant bacteria, accounting for 59.2, 11.9, and 9.4%, respectively. Gammaproteobacteria (38.3%), Alphaproteobacteria (23.2%), and Bacteroidia (12.4%) were the dominant bacteria at the class level. Low temperature had an obvious directional domestication effect on microbial flora, and the composition of the bacterial community was more similar. Pseudomonas was one of the dominant bacterial groups at 5 °C. Nitrospira (p < 0.001) and Trichococcus (p < 0.05) were significantly negatively correlated with effluent ammonia nitrogen and significantly positively correlated with NO3- (p < 0.05) at low temperature. Functional bacteria related to chemoheterotrophy (25.88%) and aerobic_chemoheterotrophy (21.56%) accounted for a relatively high proportion. The bacteria related to nitrate reduction only accounted for 2.62%. Studies have shown that low temperatures can inhibit the growth of nitrogen-cycling bacteria, and few domesticated and selected nitrogen-cycling bacteria play a major role in the removal and transformation of ammonia nitrogen. The degradation of chemical oxygen demand can still be achieved through the adsorption and degradation of dominant functional bacteria.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"90 12","pages":"3166-3179"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142903030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling and set-point definition for the development of a joint control system of two interconnected wastewater treatment plants and its application in practice. 两个互连污水处理厂联合控制系统的建模和设定点定义及其在实践中的应用。

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-12-01 Epub Date: 2024-11-27 DOI: 10.2166/wst.2024.386

Jan Tobias Schütz, Anne Kleyböcker, Sille Bendix Larsen, Malene Kristensen, Christian Remy, Ulf Miehe

引用次数: 0

Technical and financial evaluation of an emerging thermochemical technology for sustainable management of municipal wastewater sludge. 城市污水污泥可持续管理的新兴热化学技术的技术和财务评价。

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-12-01 Epub Date: 2024-12-09 DOI: 10.2166/wst.2024.395

John Ngoni Zvimba, Eustina Musvoto, Buyisile Kholisa

{"title":"Technical and financial evaluation of an emerging thermochemical technology for sustainable management of municipal wastewater sludge.","authors":"John Ngoni Zvimba, Eustina Musvoto, Buyisile Kholisa","doi":"10.2166/wst.2024.395","DOIUrl":"https://doi.org/10.2166/wst.2024.395","url":null,"abstract":"The management of municipal wastewater sludge is a significant challenge for wastewater management, particularly the need to manage and dispose of the sludge in an environmentally friendly and sustainable manner. The emergence of stricter regulations regarding landfill disposal of wastewater sludge necessitates the need for alternative options for municipal wastewater sludge management, with thermochemical technologies potentially contributing towards achieving carbon neutrality goals and fostering sustainable development. This study sought to address these challenges through a technical and financial evaluation of a pilot-scale emerging thermochemical technology, the enhanced hydrothermal polymerization to provide adequate understanding of the technology's feasibility regarding its application for municipal wastewater sludge volarization into a multi-use hydrochar. The study findings indicated that the enhanced hydrothermal polymerization-generated hydrochar exhibited significant energy content compared to wastewater sludge, suggesting the potential use of the hydrochar as an energy source. The preliminary designs of a full-scale greenfield installation and retrofit processing 50 t/d and 35 t/d dry sludge, respectively, were evaluated to be technically feasible. Furthermore, on the basis of preliminary designs, the enhanced hydrothermal polymerization technology was determined to be the most financially feasible option, also offering other unique advantages over well-established technologies currently used within municipal wastewater services.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"90 12","pages":"3139-3148"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142903452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling and integrated assessment of urban water systems. 城市水系统建模和综合评估。

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-12-01 DOI: 10.2166/wst.2024.389

Mariane Yvonne Schneider, Kimberly Solon, Sovanna Tik

引用次数: 0

Efficient degradation of tetracycline by Mn(III)-microbial complexes mediated by mnOx@ACF in sequencing batch reactors: performance, mechanism, and effect on microbial community structure. 序批式反应器中mnOx@ACF介导的Mn(III)-微生物配合物对四环素的高效降解：性能、机制及对微生物群落结构的影响

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-12-01 Epub Date: 2024-12-02 DOI: 10.2166/wst.2024.390

Huo Zhou, Lixi Xiao, Yuwei Deng, Rongling Wang, Qiang Li, Yuxuan Ye, Xuanyuan Pei, Lei Sun, Yingzhou Zhang, Fei Pan

{"title":"Efficient degradation of tetracycline by Mn(III)-microbial complexes mediated by mnOx@ACF in sequencing batch reactors: performance, mechanism, and effect on microbial community structure.","authors":"Huo Zhou, Lixi Xiao, Yuwei Deng, Rongling Wang, Qiang Li, Yuxuan Ye, Xuanyuan Pei, Lei Sun, Yingzhou Zhang, Fei Pan","doi":"10.2166/wst.2024.390","DOIUrl":"https://doi.org/10.2166/wst.2024.390","url":null,"abstract":"Engineered nanomaterials are widely used in water and wastewater treatment processes, and minimizing their adverse effects on biological treatment processes in wastewater treatment plants has become the primary focus. In this study, activated carbon fiber (ACF)-loaded manganese oxide nanomaterials (MnOx@ACF) were synthesized. A small-scale sequencing batch reactor (SBR) was constructed to simulate the synergistic degradation of pollutants by nanomaterials and microorganisms and the effects of nanomaterials on the structure of the microbial community in a wastewater treatment plant. The MnOx@ACF exhibited efficient removal of pollutants (98.7% in 30 cycles) and chemical oxygen demand (COD 96.4% in 30 cycles) through the formation of Mn-microbial complexes and enhanced cycling between Mn(III) and Mn(II) over 30 operating cycles. Metagenome analysis results showed that the microbial population composition and functional abundance increased when the SBR was exposed to different dosages of MnOx@ACF for a long time, among which 0.2 g/L MnOx@ACF exhibited the highest stimulation and influence on the functional abundance of microorganisms, which showed optimum ecological effects.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"90 11","pages":"3111-3122"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimising Venturi flume oxygen transfer efficiency using uncertainty-aware decision trees. 利用不确定性感知决策树优化文丘里水槽氧传递效率。

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-12-01 DOI: 10.2166/wst.2024.393

Nand Kumar Tiwari, Dinesh Panwar

{"title":"Optimising Venturi flume oxygen transfer efficiency using uncertainty-aware decision trees.","authors":"Nand Kumar Tiwari, Dinesh Panwar","doi":"10.2166/wst.2024.393","DOIUrl":"https://doi.org/10.2166/wst.2024.393","url":null,"abstract":"This study optimizes standard oxygen transfer efficiency (SOTE) in Venturi flumes investigating the impact of key parameters such as discharge per unit width (q), throat width (W), throat length (F), upstream entrance width (E), and gauge readings (Ha and Hb). To achieve this, a comprehensive experimental dataset was analyzed using multiple linear regression (MLR), multiple nonlinear regression (MNLR), gradient boosting machine (GBM), extreme gradient boosting (XRT), random forest (RF), M5 (pruned and unpruned), random tree (RT), and reduced error pruning (REP). Model performance was evaluated based on key metrics: correlation coefficient (CC), root mean square error (RMSE), and mean absolute error (MAE). Among the proposed models, M5_Unprun emerged as the top performer, exhibiting the highest CC (0.9455), the lowest RMSE (0.1918), and the lowest MAE (0.0030). GBM followed closely with a CC value of 0.9372, an RMSE value of 0.2067, and an MAE value of 0.0006. Uncertainty analysis further solidified the superior performance of M5_Unpruned (0.7522) and GBM (0.8055), with narrower prediction bands compared to other models, including MLR, which exhibited the widest band (1.4320). One-way analysis of variance confirmed the reliability and robustness of the proposed models. Sensitivity, correlation, and SHapley Additive exPlanations analyses identified W and Hb as the most influencing factors.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"90 12","pages":"3210-3240"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142903261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of thermal pretreatment on the anaerobic digestion characteristics of fruit waste liquids. 热预处理对水果废液厌氧消化特性的影响。

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-12-01 Epub Date: 2024-11-28 DOI: 10.2166/wst.2024.388

Haoran Sun, Hua Wang, Xinmin Zhang, Weihua Cheng, Xuyang Li

{"title":"Effects of thermal pretreatment on the anaerobic digestion characteristics of fruit waste liquids.","authors":"Haoran Sun, Hua Wang, Xinmin Zhang, Weihua Cheng, Xuyang Li","doi":"10.2166/wst.2024.388","DOIUrl":"https://doi.org/10.2166/wst.2024.388","url":null,"abstract":"Fruit waste is one of the main components of municipal waste. To study its potential and characteristics in anaerobic digestion, this study took fruit waste and its waste liquid as raw materials, investigate the influence of thermal pretreatment on the anaerobic digestion characteristics under 35 ± 17 °C. The anaerobic digestion materials were fruit waste liquid (group A1), fruit waste liquid after thermal pretreatment (group A2), fruit slurry (group A3), and the material of A2 and A3 mixed with municipal sludge (groups A4 and A5) has also been involved. The results showed that the thermal pretreatment is in favor of increasing the total gas production rate, which the waste liquid after thermal pretreatment (A2) was the highest one with 767.09 mL/gVS which 6.51% higher than A1; while it has not obviously influence on the total hydrogen production rate of waste liquid; the addition of municipal sludge increased the total methane production rate of fruit waste or its liquid. After thermal pretreatment, the pH of fruit waste was 0.37 lower than initial pH; VFAs and SCOD content were both increased, which are benefit for anaerobic digestion. In addition, the experimental data were verified by the modified Gompertz model.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"90 11","pages":"3041-3051"},"PeriodicalIF":2.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Navigating the definition of urban flooding: A conceptual and systematic review of the literature. 导航城市洪水的定义：对文献的概念和系统回顾。

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-11-01 Epub Date: 2024-10-23 DOI: 10.2166/wst.2024.351

Priscila B R Alves, Ebenezer Amanguah, Devin McNally, Maria Espinoza, Hamed Ghaedi, Allison C Reilly, Marccus D Hendricks

{"title":"Navigating the definition of urban flooding: A conceptual and systematic review of the literature.","authors":"Priscila B R Alves, Ebenezer Amanguah, Devin McNally, Maria Espinoza, Hamed Ghaedi, Allison C Reilly, Marccus D Hendricks","doi":"10.2166/wst.2024.351","DOIUrl":"https://doi.org/10.2166/wst.2024.351","url":null,"abstract":"Urban flooding is a pervasive global risk, posing a great challenge to urban planners, policymakers, and particularly communities. This paper reviews the literature to analyze how urban flooding is defined across scientific disciplines. Our objectives are to uncover the elements used to define urban flooding and evaluate how these elements can impact future research and practice. A key difficulty is the lack of a consistent, comprehensive definition that captures both physical and social dimensions of urban flooding. Current definitions often focus solely on physical aspects (e.g., rainfall, infrastructure) or social impacts, rarely integrating both. This fragmentation hinders effective flood risk management and interdisciplinary collaboration. Our contribution is a multifaceted definition incorporating spatial and social concerns, including water origins, built environment characteristics, and local community aspects. We introduce the 'Urban Water Transect' concept to illustrate the continuum of flood risk across urban zones, addressing a gap in the literature. The analysis reveals that many papers discuss flooding causes without providing an explicit definition. Urban flooding is predominantly defined based on water source, imperviousness, and drainage infrastructure. Future research should adopt an interdisciplinary perspective considering both physical and social aspects, potentially transforming urban flood risk management.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"90 10","pages":"2796-2812"},"PeriodicalIF":2.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142751779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Developing a universal equation to estimate the mass of dewatered wastewater sludge during biological digestion at mesophilic and thermophilic temperatures. 建立一个通用方程来估计在嗜温和嗜热温度下生物消化过程中脱水废水污泥的质量。

IF 2.5 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-11-01 Epub Date: 2024-11-08 DOI: 10.2166/wst.2024.366

Eskandar Poorasgari, Banu Örmeci

{"title":"Developing a universal equation to estimate the mass of dewatered wastewater sludge during biological digestion at mesophilic and thermophilic temperatures.","authors":"Eskandar Poorasgari, Banu Örmeci","doi":"10.2166/wst.2024.366","DOIUrl":"https://doi.org/10.2166/wst.2024.366","url":null,"abstract":"A series of dewaterability tests were conducted on various types of sludges to establish a wholistic relationship between sludge water fractions. Sludge samples were obtained from batch and continuous sludge digesters, which were operated anaerobically and aerobically under mesophilic and thermophilic conditions. Dewaterability of the sludge samples and the distribution of water fractions were studied using centrifugation and thermal drying. Thickened waste activated sludge (T-WAS) contained 10-11 g bound water (BW)/g of total solids (TS), and it was more hydrophilic than primary and digested sludges. During anaerobic digestion, BW content fluctuated between 3.2 and 4.2 g BW/g TS. However, aerobic digestion at 55°C reduced the BW content of the mixed T-WAS + primary sludges from 3.7 to 2.1 g BW/g TS. A linear function was developed to correlate supernatant and BW mass fractions (R2 = 0.995). An equation was derived from the linear function to estimate the mass of dewatered sludge based on the TS concentration of the initial wet sludge. The developed expression is applicable to different kinds of wastewater sludges. Such an expression would be helpful for the designers and operators of sludge thickening and dewatering systems that use centrifugal separation.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"90 10","pages":"2894-2910"},"PeriodicalIF":2.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142751773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0