Water Research X最新文献

{"title":"Towards Stable and Efficient Nitrogen Removal in Wastewater Treatment Processes Via an Adaptive Neural Network Based Sliding Mode Controller","authors":"Yiqi Liu ,&nbsp;Jing Zhang ,&nbsp;Zhuyi Qiu ,&nbsp;Yigang Zhang ,&nbsp;Guangping Yu ,&nbsp;Hongtao Ye ,&nbsp;Zefan Cai","doi":"10.1016/j.wroa.2024.100245","DOIUrl":"10.1016/j.wroa.2024.100245","url":null,"abstract":"<div><p>Advanced controllers often offer an innovative solution to proper quality control in wastewater treatment processes (WWTPs). However, nonlinearity and uncertain disturbances usually make the conventional control strategies inadequate or impossible for the stable operations of WWTPs. To guarantee the stability of ammonia nitrogen concentration (<span><math><msub><mi>S</mi><mrow><mi>N</mi><mi>H</mi></mrow></msub></math></span>) control in WWTPs, a direct adaptive neural networks-based sliding mode control (ANNSMC) strategy has been proposed in this article. A sliding mode controller is designed and implemented with the help of an adaptive Neural Network (ANN), named Radial Basis Function Neural Network (RBFNN), which can approach the desired control law accurately. Also, the stability of a system installed with the ANNSMC is analyzed by using the Lyapunov theorem, which ensures system robustness and adaptability. Additionally, to deal with high energy consumption and low treatment efficiency problems in the wastewater denitrification processes, this paper proposes a dual-loop denitrification control strategy and validates it in the Benchmark Simulation Model No.2 (BSM2) platform. The strategy can strengthen the denitrification efficiency by collaborating the <span><math><msub><mi>S</mi><mrow><mi>N</mi><mi>H</mi></mrow></msub></math></span> with nitrate nitrogen (<span><math><msub><mi>S</mi><mrow><mi>N</mi><mi>O</mi></mrow></msub></math></span>) concentration in the WWTPs properly. The experimental results demonstrate that the proposed strategy can obtain remarkable stability and robustness, reducing energy consumption effectively compared with other standard and advanced control strategies.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100245"},"PeriodicalIF":7.2,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589914724000355/pdfft?md5=1ce9f584cf8205423e62e081c01ae36d&pid=1-s2.0-S2589914724000355-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perfluoroalkyl functionalized-Au nanoparticle sensor: Employing rate of spectrum shifting for highly selective and sensitive detection of per- and polyfluoroalkyl substances (PFASs) in aqueous environments","authors":"Jihyeun Jung ,&nbsp;Junyoung Park ,&nbsp;Jong Kwon Choe ,&nbsp;Yongju Choi","doi":"10.1016/j.wroa.2024.100239","DOIUrl":"10.1016/j.wroa.2024.100239","url":null,"abstract":"<div><p>Per- and polyfluoroalkyl substances (PFASs) are emerging contaminants detected ubiquitously and have negative impacts on human health and ecosystem; thus, developing <em>in-situ</em> sensing technique is important to ensure safety. Herein, we report a novel colorimetric-based sensor with perfluoroalkyl receptor attached to citrate coated gold nanoparticles (Citrate-Au NPs) that can detect several PFASs including perfluorocarboxylates with different chain lengths (PFHxA, PFOA, PFNA, PFDA), perfluorooctanoic sulfonate (PFOS), and perfluorooctanoic phosphonate (PFOPA). The sensor detects PFASs utilizing fluorous interaction between PFASs and the perfluoroalkyl receptor of Citrate-Au NPs in a solution at a fixed salt concentration, inducing changes in nanoparticle dispersity and the solution color. The rate of spectrum shift was linearly dependent on PFASs concentrations. Citrate-Au NPs with size between 29 – 109 nm were synthesized by adjusting citrate/Au molar ratios, and 78 nm showed the best sensitivity to PFOA concentration (with level of detection of 4.96 µM). Citrate-Au NPs only interacted with PFASs with perfluoroalkyl length &gt; 4 and not with non-fluorinated alkyl compound (nonanoic acid). The performance of Citrate-Au NP based sensor was strongly dependent on the chain length of the perfluoroalkyl group and the head functional group; higher sensitivity was observed with longer chain over shorter chain, and with sulfonate functional group over carboxylate and phosphonate. The sensor was tested using real water samples (i.e., tap water, filtered river water), and it was found that the sensor is capable of detecting PFASs in these conditions if calibrated with the corresponding water matrix. While further optimization is needed, this study demonstrated new capability of Citrate-Au NPs based sensor for detection of PFASs in water.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100239"},"PeriodicalIF":7.2,"publicationDate":"2024-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S258991472400029X/pdfft?md5=8ac9eb812d5e44d71307e45861d57dbd&pid=1-s2.0-S258991472400029X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141843961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High resolution data visualization and machine learning prediction of free chlorine residual in a green building water system","authors":"S. Wei ,&nbsp;R. Richard ,&nbsp;D. Hogue ,&nbsp;I. Mondal ,&nbsp;T. Xu ,&nbsp;T.H. Boyer ,&nbsp;K.A. Hamilton","doi":"10.1016/j.wroa.2024.100244","DOIUrl":"10.1016/j.wroa.2024.100244","url":null,"abstract":"<div><p>People spend most of their time indoors and are exposed to numerous contaminants in the built environment. Water management plans implemented in buildings are designed to manage the risks of preventable diseases caused by drinking water contaminants such as opportunistic pathogens (e.g., <em>Legionella</em> spp<em>.</em>), metals, and disinfection by-products (DBPs). However, specialized training required to implement water management plans and heterogeneity in building characteristics limit their widespread adoption. Implementation of machine learning and artificial intelligence (ML/AI) models in building water settings presents an opportunity for faster, more widespread use of data-driven water quality management approaches. We demonstrate the utility of Random Forest and Long Short-Term Memory (LSTM) ML models for predicting a key public health parameter, free chlorine residual, as a function of data collected from building water quality sensors (ORP, pH, conductivity, and temperature) as well as WiFi signals as a proxy for building occupancy and water usage in a “green” Leadership in Energy and Environmental Design (LEED) commercial and institutional building. The models successfully predicted free chlorine residual declines below 0.2 ppm, a common minimum reference level for public health protection in drinking water distribution systems. The predictions were valid up to 5 min in advance, and in some cases reasonably accurate up to 24 h in advance, presenting opportunities for proactive water quality management as part of a sense-analyze-decide framework. An online data dashboard for visualizing water quality in the building is presented, with the potential to link these approaches for real-time water quality management.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100244"},"PeriodicalIF":7.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589914724000343/pdfft?md5=9bbb00daa0ee30e2833e3440fc3a810e&pid=1-s2.0-S2589914724000343-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A maverick: Environmentally relevant concentrations of nonylphenol attenuate the plasmid-mediated conjugative transfer of antibiotic resistance genes","authors":"Si-Zhou Liang ,&nbsp;Ya-Jun Chang ,&nbsp;Philip Semaha ,&nbsp;Li-Zhu Liu ,&nbsp;Yan Gao ,&nbsp;Zhi Wang ,&nbsp;Wei-Guo Zhang","doi":"10.1016/j.wroa.2024.100241","DOIUrl":"10.1016/j.wroa.2024.100241","url":null,"abstract":"<div><p>Given that many organic pollutants have been reported to facilitate the plasmid-mediated conjugative transfer of antibiotic resistance genes (ARGs), it was naturally deduced that nonylphenol (NP) can also have this kind of effect. Whereas, this study demonstrates an entirely different result that environmentally relevant concentrations of NP attenuate plasmid-mediated ARGs conjugative transfer (maximum inhibition rate 64 %), further study show that NP exposure had no significant effect on bacterial growth, cell vitality, oxidative stress response, and expression of conjugation-relevant genes, which were reported to closely relate to the conjugative transfer in numerous studies. Conclusively, it was found that the dispersant function of NP impeded the occurrence of cell mating, thus was responsible for the decline of conjugative transfer. This study shows a new perspective on understanding the effect of organic pollutants like NP on the ARGs horizontal dissemination in environment.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100241"},"PeriodicalIF":7.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589914724000318/pdfft?md5=825587c1d724f818a79ffb6684271469&pid=1-s2.0-S2589914724000318-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141852706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon footprint analysis of wastewater treatment processes coupled with sludge in situ reduction","authors":"Yiyue Sun ,&nbsp;Yi Zuo ,&nbsp;Yanjun Shao ,&nbsp;Lihua Wang ,&nbsp;Lu-Man Jiang ,&nbsp;Jiaming Hu ,&nbsp;Chuanting Zhou ,&nbsp;Xi Lu ,&nbsp;Song Huang ,&nbsp;Zhen Zhou","doi":"10.1016/j.wroa.2024.100243","DOIUrl":"10.1016/j.wroa.2024.100243","url":null,"abstract":"<div><p>The goal of this study was to assess the impacts or benefits of sludge in situ reduction (SIR) within wastewater treatment processes with relation to global warming potential in wastewater treatment plants, with a comprehensive consideration of wastewater and sludge treatment. The anaerobic side-stream reactor (ASSR) and the sludge process reduction activated sludge (SPRAS), two typical SIR technologies, were used to compare the carbon footprint analysis results with the conventional anaerobic - anoxic - oxic (AAO) process. Compared to the AAO, the ASSR with a typical sludge reduction efficiency (SRE) of 30 % increased greenhouse gas (GHG) emissions by 1.1 - 1.7 %, while the SPRAS with a SRE of 74 % reduced GHG emissions by 12.3 - 17.6 %. Electricity consumption (0.025 - 0.027 kg CO_2-eq/m³), CO₂ emissions (0.016 - 0.059 kg CO_2-eq/m³), and N₂O emissions (0.009 - 0.023 kg CO_2-eq/m³) for the removal of secondary substrates released from sludge decay in the SIR processes were the major contributor to the increased GHG emissions from the wastewater treatment system. By lowering sludge production and the organic matter content in the sludge, the SIR processes significantly decreased the carbon footprints associated with sludge treatment and disposal. The threshold SREs of the ASSR for GHG reduction were 27.7 % and 34.6 % for the advanced dewatering - sanitary landfill and conventional dewatering - drying-incinerating routes, respectively. Overall, the SPRAS process could be considered as a cost-effective and sustainable low-carbon SIR technology for wastewater treatment.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100243"},"PeriodicalIF":7.2,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589914724000331/pdfft?md5=2de9b0c83b367b3abb143647d9212f29&pid=1-s2.0-S2589914724000331-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141848269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quadrupling the capacity of post aerobic digestion treating anaerobically digested sludge using a moving-bed biofilm (MBBR) configuration","authors":"Zhiyao Wang ,&nbsp;Xi Lu ,&nbsp;Min Zheng ,&nbsp;Zhetai Hu ,&nbsp;Damien Batstone ,&nbsp;Zhiguo Yuan ,&nbsp;Shihu Hu","doi":"10.1016/j.wroa.2024.100240","DOIUrl":"10.1016/j.wroa.2024.100240","url":null,"abstract":"<div><p>Wastewater treatment plants produce large amounts of sludge requiring stabilization before safe disposal. Traditional biological stabilization approaches are cost-effective but generally require either an extended retention time (10–40 days), or elevated temperatures (40–80 °C) for effective pathogens inactivation. This study overcomes these limitations via a novel acidic aerobic digestion process, leveraging an acid-tolerant ammonia-oxidizing bacterium (AOB) <em>Candidatus</em> Nitrosoglobus. To retain this novel but slowly growing AOB, we proposed the first-ever application of a classical wastewater configuration—moving bed biofilm reactor (MBBR)—for sludge treatment. The AOB in biofilm maintains acidic pH and high nitrite levels in sludge, generating free nitrous acid in situ to expedite sludge stabilization. This process was tested in two laboratory-scale aerobic digesters processing full-scale anaerobically digested sludge. At an ambient temperature of 20 °C, pathogens were reduced to levels well below the threshold specified for the highest stabilization level (Class A), within a retention time of 3.5 days. A high volatile solids reduction of 27.4 ± 5.2% was achieved. Through drastically accelerating stabilization and enhancing reduction, this process substantially saves capital and operational costs for sludge disposal.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100240"},"PeriodicalIF":7.2,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589914724000306/pdfft?md5=40ed91b99cf87da03a8c29e628fdcd57&pid=1-s2.0-S2589914724000306-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141850418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unexpectedly high antibacterial ability of water in copper pot with tiny amount of plant leaves","authors":"Min Zhang ,&nbsp;Zhening Fang ,&nbsp;Jun Wang ,&nbsp;Rui Ding ,&nbsp;Haiping Fang ,&nbsp;Ruoyang Chen","doi":"10.1016/j.wroa.2024.100238","DOIUrl":"10.1016/j.wroa.2024.100238","url":null,"abstract":"<div><p>Water disinfection by copper vessels has been prevalent over thousands of years. Unfortunately, people are still suffering from the bacterial pollution in drinking water. Here we show that, only through steeping with tiny amounts of common plant leaves, the room-temperature water in copper pots has unexpectedly high antibacterial ability. Remarkably, copper ions released from copper pots into water are in concentrations lower than the WHO safety threshold for drinking water, and have effective antibacterial ability when water contains specific leave components (polyphenols and/or lignin). Our computations show that the key to enhance antibacterial ability is the great increase in the proportion of Cu⁺ induced by aromatic rings in these leave components, which has been demonstrated by our experiments. The findings may disclose the mystery of copper vessels for water disinfection, and more importantly, provide effective antibacterial applications in industries and daily lives, by safely using copper ions together with biocompatible natural substances.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100238"},"PeriodicalIF":7.2,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589914724000288/pdfft?md5=78fdaf6596718360d9424d0a61897d31&pid=1-s2.0-S2589914724000288-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141702863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A positive contribution to nitrogen removal by a novel NOB in a full-scale duck wastewater treatment system","authors":"Pengfei Hu ,&nbsp;Youfen Qian ,&nbsp;Yanbin Xu ,&nbsp;Adi Radian ,&nbsp;Yuchun Yang ,&nbsp;Ji-Dong Gu","doi":"10.1016/j.wroa.2024.100237","DOIUrl":"10.1016/j.wroa.2024.100237","url":null,"abstract":"<div><p>Nitrite-oxidizing bacteria (NOB) are undesirable in the anaerobic ammonium oxidation (anammox)-driven nitrogen removal technologies in the modern wastewater treatment plants (WWTPs). Diverse strategies have been developed to suppress NOB based on their physiological properties that we have understood. But our knowledge of the diversity and mechanisms employed by NOB for survival in the modern WWTPs remains limited. Here, Three NOB species (NOB01–03) were recovered from the metagenomic datasets of a full-scale WWTP treating duck breeding wastewater. Among them, NOB01 and NOB02 were classified as newly identified lineage VII, tentatively named <em>Candidatus</em> (<em>Ca.</em>) Nitrospira NOB01 and <em>Ca.</em> Nitrospira NOB02. Analyses of genomes and in situ transcriptomes revealed that these two novel NOB were active and showed a high metabolic versatility. The transcriptional activity of <em>Ca.</em> Nitrospira could be detected in all tanks with quite different dissolved oxygen (DO) (0.01–5.01 mg/L), illustrating <em>Ca.</em> Nitrospira can survive in fluctuating DO conditions. The much lower <em>Ca.</em> Nitrospira abundance on the anammox bacteria-enriched sponge carrier likely originated from the intensification substrate (NO₂⁻) competition from anammox and denitrifying bacteria. In particular, a highlight is that <em>Ca.</em> Nitrospira encoded and treanscribed cyanate hydratase (CynS), amine oxidase, urease (UreC), and copper-containing nitrite reductase (NirK) related to ammonium and NO production, driving NOB to interact with the co-existed AOB and anammox bacteria. <em>Ca.</em> Nitrospira strains NOB01 and NOB02 showed quite different niche preference in the same aerobic tank, which dominanted the NOB communities in activated sludge and biofilm, respectively. In addition to the common rTCA cycle for CO₂ fixation, a reductive glycine pathway (RGP) was encoded and transcribed by NOB02 likely for CO₂ fixation purpose. Additionally, a 3b group hydrogenase and respiratory nitrate reductase were uniquely encoded and transcribed by NOB02, which likely confer a survival advantage to this strain in the fluctuant activated sludge niche. The discovery of this new genus significantly broadens our understanding of the ecophysiology of NOB. Furthermore, the impressive metabolic versatility of the novel NOB revealed in this study advances our understanding of the survival strategy of NOB and provides valuable insight for suppressing NOB in the anammox-based WWTP.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100237"},"PeriodicalIF":7.2,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589914724000276/pdfft?md5=04648454e6f8c75310c750db6732638e&pid=1-s2.0-S2589914724000276-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141706652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"UV LED wastewater disinfection: The future is upon us","authors":"Sean A MacIsaac ,&nbsp;Bailey Reid ,&nbsp;Carolina Ontiveros ,&nbsp;Karl G Linden ,&nbsp;Amina K Stoddart ,&nbsp;Graham A Gagnon","doi":"10.1016/j.wroa.2024.100236","DOIUrl":"https://doi.org/10.1016/j.wroa.2024.100236","url":null,"abstract":"<div><p>The world's first full-scale, 280 nm UV LED reactor for wastewater disinfection was tested at flows of 545 and 817 m³ day⁻¹. The system achieved <em>a</em> &gt; 3 average log reduction of total coliform at 545 m³ day⁻¹ and the 817 m³ day⁻¹ flow rate achieved over <em>a</em> &gt; 2.5 average log reduction for all operational conditions. The delivered fluence of the full-scale system ranged from 28 to 148 mJ cm⁻² and aligns with a UV auditing study that was conducted prior to the installation of the wastewater reactor. These results benchmark the performance that can be achieved by UV LED disinfection and further connect bench-scale disinfection results with full-scale performance. The approach established in this manuscript provides a novel tool for utilities when considering emerging UV disinfection technologies. In summary, this study establishes that UV LEDs are an effective wastewater disinfectant at-scale and are comparable to conventional low-pressure UV systems. This is the first instance where the efficacy of UV LEDs for municipal wastewater disinfection has been demonstrated using a large-scale installation at a functioning wastewater facility.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100236"},"PeriodicalIF":7.2,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589914724000264/pdfft?md5=1cdeb6c98309d36cebcd779fe132c35a&pid=1-s2.0-S2589914724000264-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141607598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biodegradation kinetics of organic micropollutants in biofilters for advanced wastewater treatment – Impact of operational conditions and biomass origin on removal","authors":"Tobias Kaiser ,&nbsp;Thomas Fundneider ,&nbsp;Susanne Lackner","doi":"10.1016/j.wroa.2024.100235","DOIUrl":"10.1016/j.wroa.2024.100235","url":null,"abstract":"<div><p>Biofiltration processes are often part of advanced wastewater treatment (aWWT) technologies for the removal of organic micropollutants (OMP) from conventional wastewater treatment plant (WWTP) effluents. Although biological effects are not always the main focus of these technologies (e.g. filtration through granular activated carbon), they have been shown to contribute significantly to total OMP removal. While OMP biodegradation kinetics in conventional biological wastewater treatment are well researched, no systematic comparison to biomass from aWWT is available. This biomass faces different growth conditions and higher OMP concentrations relative to the background organic matter. Adaptation to these conditions could be possible and could lead to faster OMP biodegradation kinetics, which would show in a larger pseudo first-order biodegradation kinetic constant k_biol. In this work, k_biol values for biomass obtained from aWWT biofilters were determined by evaluating OMP removals measured in lab-scale biofilters using a mechanistic model of the experimental setup. A comparison to k_biol values from literature for conventional wastewater treatment (with nutrient removal) revealed similar OMP biodegradation kinetics without any advantages of biomass from aWWT. A conceptual evaluation of influencing factors on OMP removal in biofilters showed that operational parameters (such as the biomass concentration or the empty bed contact time) and the affinity of OMPs to adsorb on biomass have a significant additional effect on biological OMP removal. Therefore, k_biol values alone are not sufficient to estimate biological OMP removal in biofilters and further information about the system is required.</p></div>","PeriodicalId":52198,"journal":{"name":"Water Research X","volume":"24 ","pages":"Article 100235"},"PeriodicalIF":7.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589914724000252/pdfft?md5=7bdf1df739adc40326efe9bb4e5e123e&pid=1-s2.0-S2589914724000252-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141622264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}