ACS ES&T engineering最新文献

{"title":"How Do Novel PFAS Sorbents Fit into Current Engineering Paradigm?","authors":"Jonathan Burkhardt*,&nbsp;Thomas F. Speth,&nbsp;Stanley Gorzelnik,&nbsp;Alexander S. Gorzalski,&nbsp;Orlando Coronell,&nbsp;Ahmed Rachid El-Khattabi and Mohamed Ateia*,&nbsp;","doi":"10.1021/acsestengg.5c0003610.1021/acsestengg.5c00036","DOIUrl":"https://doi.org/10.1021/acsestengg.5c00036https://doi.org/10.1021/acsestengg.5c00036","url":null,"abstract":"<p >As the emergence of novel sorbents brings new possibilities for treatment of per- and polyfluoroalkyl substances (PFAS), drinking water and wastewater utilities face critical decisions in selecting effective, future-ready technologies. With regulatory pressures to address PFAS contamination mounting, however, many utilities may not be in a position to fully evaluate the potential of these novel sorbents and are instead preparing to adopt established technologies that are currently available, such as granular activated carbon (GAC) and ion exchange (IX) resins. Given the expected long life spans of any chosen system, it is important to consider all options, including future treatment innovations. This perspective provides insights into their potential advantages and challenges by exploring the current state of novel sorbents within the broader context of existing technologies. Novel sorbents bring promising benefits, including enhanced selectivity, rapid kinetics, and flexibility for different PFAS chemistries, particularly in challenging matrices such as wastewater. Despite their advantages, significant work remains to refine these materials for large-scale application, including addressing scalability, cost-effectiveness, fouling resistance, and regulatory certification hurdles. By examining key factors for both utilities and novel sorbent developers, this perspective aims to guide informed decisions that balance immediate regulatory compliance with long-term adaptability.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"830–838 830–838"},"PeriodicalIF":7.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814477","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}

{"title":"Development of a Novel PCB-Degrading Biofilm Enriched Biochar Encapsulated with Sol-Gel: A Protective Layer to Sustain Biodegradation Activity.","authors":"Qin Dong, Timothy E Mattes, Gregory H LeFevre","doi":"10.1021/acsestengg.4c00718","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00718","url":null,"abstract":"<p><p><i>Paraburkholderia xenovorans</i> LB400 biofilms hold the potential to degrade PCBs in contaminated sediment. Nevertheless, unfavorable environmental conditions (e.g., salinity, temperature, and shear force) can interfere with biofilm stability and affect biodegradation potential. Sol-gel encapsulation has been used to protect planktonic cell function due to high material stability and absence of cell washout but has not been employed for biofilm protection. Our study is the first to develop sol-gel application on biofilm-enriched black carbons and evaluate efficacy for prolonging biodegradation potential. We systematically tuned multiple sol-gel recipes to coat biofilms and measured the impact of the sol-gel coating on cell survival and pollutant degradation. The developed sol-gel completely encapsulated biofilm-enriched black carbons and produced both high porosity and appropriate pore size that allowed pollutant transfer from the surrounding environment to the biofilms. The sol-gel maintained physical integrity under saline conditions (simulating marine and estuary sediments) and continuously applied shear force. Additionally, the encapsulated biofilms degraded benzoate, a proof-of-concept organic molecule, and extended biofilm attachment and cell viability for over three months without a carbon and energy source. Our study demonstrates that sol-gel helps sustain PCB-degrading biofilms under environmentally relevant conditions. This novel sol-gel application can potentially improve the bioaugmentation effectiveness and enhance degradation of environmental pollutants.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"883-898"},"PeriodicalIF":7.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11998003/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143955641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In Situ Anammox Self-Enrichment Using a Pilot-Scale Hybrid Membrane-Aerated Biofilm Reactor System for Municipal Wastewater Treatment with a Low Carbon to Nitrogen Ratio","authors":"Hsin-Chieh Lin,&nbsp;Ting-Kuang Chen,&nbsp;Neil Hu,&nbsp;Yu-Tzu Huang* and Chia-Hung Hou*,&nbsp;","doi":"10.1021/acsestengg.4c0086510.1021/acsestengg.4c00865","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00865https://doi.org/10.1021/acsestengg.4c00865","url":null,"abstract":"<p >This study pioneers the demonstration of <i>in situ</i> Anammox self-enrichment using a pilot-scale hybrid membrane-aerated biofilm reactor (MABR) system. This system was inoculated with ordinary nitrifying–denitrifying sludge to treat municipal wastewater with a low sCOD/TN ratio of 1.5 to 1.9. At a hydraulic retention time of 6 h and a sludge reflux ratio of 50%, the hybrid MABR achieved an average volumetric total nitrogen removal rate of 192.1 g/m³·d in the anoxic unit, outperforming the Modified Ludzack–Ettinger (MLE) system by 3.9 times. <i>Candidatus Brocadia</i>, representing 6.91%, was the most dominant bacterial genus in the MABR biofilm, providing vital evidence of Anammox bacterial enrichment. Additionally, quantitative PCR was used to quantify specific functional genes in three different sections (inlet, middle, and outlet) of the MABR biofilm, revealing spatial heterogeneity with a longitudinal O₂ level shift. As a result, the abundances of <i>narG</i> (positively correlated with partial denitrification, PD) and <i>nxr</i> (negatively correlated with partial nitritation, PN) were both high in the inlet section and synchronously decreased toward the outlet. This result is promising in light of the hypothesis that the main supporting reaction for Anammox near the inlet is highly potentially PD, then gradually shifting to PN as the O₂ level diminishes toward the outlet, enabling the coupling of PN/A-PD/A in MABR. These findings offer valuable insights into the mechanisms underlying Anammox application in MABR, advancing the treatment of municipal wastewater with a carbon-to-nitrogen ratio.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 5","pages":"1242–1254 1242–1254"},"PeriodicalIF":7.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestengg.4c00865","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143921491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a Novel PCB-Degrading Biofilm Enriched Biochar Encapsulated with Sol–Gel: A Protective Layer to Sustain Biodegradation Activity","authors":"Qin Dong,&nbsp;Timothy E. Mattes* and Gregory H. LeFevre*,&nbsp;","doi":"10.1021/acsestengg.4c0071810.1021/acsestengg.4c00718","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00718https://doi.org/10.1021/acsestengg.4c00718","url":null,"abstract":"<p ><i>Paraburkholderia xenovorans</i> LB400 biofilms hold the potential to degrade PCBs in contaminated sediment. Nevertheless, unfavorable environmental conditions (e.g., salinity, temperature, and shear force) can interfere with biofilm stability and affect biodegradation potential. Sol–gel encapsulation has been used to protect planktonic cell function due to high material stability and absence of cell washout but has not been employed for biofilm protection. Our study is the first to develop sol–gel application on biofilm-enriched black carbons and evaluate efficacy for prolonging biodegradation potential. We systematically tuned multiple sol–gel recipes to coat biofilms and measured the impact of the sol–gel coating on cell survival and pollutant degradation. The developed sol–gel completely encapsulated biofilm-enriched black carbons and produced both high porosity and appropriate pore size that allowed pollutant transfer from the surrounding environment to the biofilms. The sol–gel maintained physical integrity under saline conditions (simulating marine and estuary sediments) and continuously applied shear force. Additionally, the encapsulated biofilms degraded benzoate, a proof-of-concept organic molecule, and extended biofilm attachment and cell viability for over three months without a carbon and energy source. Our study demonstrates that sol–gel helps sustain PCB-degrading biofilms under environmentally relevant conditions. This novel sol–gel application can potentially improve the bioaugmentation effectiveness and enhance degradation of environmental pollutants.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"883–898 883–898"},"PeriodicalIF":7.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestengg.4c00718","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrodepositing Polyvinyl Ferrocene Films to Enhance Oxyanion Recovery and Electrode Longevity","authors":"Yurui Li,&nbsp;Anaira Román Santiago,&nbsp;Kwiyong Kim,&nbsp;Junhyung Park,&nbsp;Joseph R. Hladik,&nbsp;Xiao Su and Roland D. Cusick*,&nbsp;","doi":"10.1021/acsestengg.4c0078710.1021/acsestengg.4c00787","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00787https://doi.org/10.1021/acsestengg.4c00787","url":null,"abstract":"<p >Rhenium, a critical high-value mineral, naturally occurs as perrhenate (ReO₄^–) and is difficult to separate from competing anions. Polyvinyl ferrocene (PVF) coated electrodes have exhibited selective adsorption of transition metal oxyanions, but performance degradation with cycling is poorly understood. This study examines the impact of two PVF film fabrication strategies (electrodeposition (ED) and dip-coating (DC)) on (i) rhenium uptake capacity and selectivity, (ii) electrode regeneration and performance longevity, and (iii) lifecycle cost of Re recovery. Electrodeposited PVF films exhibited nearly twice the rhenium uptake (351 ± 82.1 mg Re/g coating) of dip-coating PVF films (158 ± 32.7 mg Re/g coating). Additionally, after 15,000 charge/discharge cycles, Re uptake remained 69.1 ± 11.3% for ED but only 28.0 ± 12.3% for DC films, indicating improved PVF attachment to carbon scaffolds. Operational conditions significantly affected rhenium release after adsorption, with regeneration of 82.6 ± 9.4% at −0.8 V vs Ag/AgCl compared to 30.78 ± 6.2% at 0 V vs Ag/AgCl, due to reduction of both Fe and Re which promoted electrode regeneration at −0.8 V vs Ag/AgCl. A preliminary technoeconomic analysis indicates the high selectivity and longevity of PVF-ED electrodes could facilitate Re recovery at ∼5% of the current market price.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 4","pages":"1023–1031 1023–1031"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814439","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}

{"title":"Harnessing Sewage Sludge Microbiota from Wastewater Treatment Plants for Tetrachloroethene Detoxification","authors":"Guofang Xu,&nbsp; and ,&nbsp;Jianzhong He*,&nbsp;","doi":"10.1021/acsestengg.4c0090010.1021/acsestengg.4c00900","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00900https://doi.org/10.1021/acsestengg.4c00900","url":null,"abstract":"<p >Chlorinated solvent contamination in groundwater poses significant risks to the ecosystem integrity and public health. Bioremediation using organohalide-respiring bacteria (OHRB) is a prospective strategy to address this issue. Identifying accessible and cost-effective bioinoculants is crucial for the successful application of this approach on the field scale. In this study, we demonstrate the capability of sewage sludge microorganisms from wastewater treatment plants (WWTPs) to reductively dechlorinate tetrachloroethene. Remarkably, 63 of 84 sludge microbiota samples from WWTPs completely detoxified tetrachloroethene (PCE) to ethene through various intermediate products. The dechlorination capacity was attributed to the synergistic activity of diverse OHRB populations, including <i>Dehalococcoides</i>, <i>Dehalogenimonas</i>, <i>Dehalobacter</i>, <i>Geobacter</i>, and <i>Sulfurospirillum</i>, demonstrating the diversity of OHRB in this engineered system. Additionally, a range of canonical reductive dehalogenase genes (e.g., <i>tceA</i>, <i>vcrA</i>, <i>bvcA</i>, <i>pteA</i>, and <i>pceA</i>) were identified, with <i>tceA</i> likely responsible for the complete dechlorination of vinyl chloride in at least 10 sludge microcosms. Community-level analysis further revealed a core microbiome in PCE-dechlorinating microcosms, predominantly composed of fermenters, methanogens, and syntrophic bacteria, guiding the construction of tailored dechlorinating consortia for bioremediation applications. These findings highlight sewage sludge as a valuable and underutilized microbial resource for application in the remediation of environments polluted with chlorinated solvents.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 5","pages":"1298–1305 1298–1305"},"PeriodicalIF":7.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143921285","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}

{"title":"Metabolic Engineering of Halomonas cupida for Efficient Mineralization of an Organochlorine Herbicide 2,4-Dichlorophenoxyacetic Acid in High Saline Wastewater","authors":"Weini Xiong,&nbsp;Yujie Liu,&nbsp;Yan Meng,&nbsp;Yuting Jiang,&nbsp;Haomin Chen,&nbsp;Ruihua Liu* and Chao Yang*,&nbsp;","doi":"10.1021/acsestengg.4c0089710.1021/acsestengg.4c00897","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00897https://doi.org/10.1021/acsestengg.4c00897","url":null,"abstract":"<p >The treatment performance of high-salinity wastewater containing 2,4-dichlorophenoxyacetic acid (2,4-D) is severely impaired by high osmotic pressure and toxic substances. In this study, a heterologous biodegradation pathway comprising the six genes <i>tfdABCDEF,</i> responsible for the bioconversion of 2,4-D into 3-oxoadipate, and the genes encoding <i>Vitreoscilla</i> hemoglobin (VHb) and green fluorescent protein (GFP) were integrated into the genome of the salt-tolerant chassis <i>Halomonas cupida</i> J9 to generate a halotolerant degrader J9U_2,4-D. The successful transcription of the eight exogenous genes in J9U_2,4-D was demonstrated by RT-PCR. The catalytic activity of the <i>tfdABC</i> genes was directly demonstrated by incubating each intermediate strain with a specific substrate. Stable isotope analysis indicated that J9U_2,4-D efficiently converted ¹³C₆-2,4-D into ¹³CO₂, demonstrating the complete mineralization of 2,4-D in high salt media. Under oxygen-limited conditions, 25 mg/L 2,4-D was completely degraded by J9U_2,4-D within 8 h, suggesting the strain’s applicability in groundwater bioremediation. The strong green fluorescence emitted by J9U_2,4-D is visible in sunlight and provides a reliable tracking system during bioremediation. The removal efficiency of 2,4-D in high-saline wastewater containing 100 mg/L 2,4-D and 100 g/L NaCl reached 90% within 15 h, and ¹³C₆-2,4-D can be converted by J9U_2,4-D into ¹³CO₂ in high-saline wastewater containing 100 g/L NaCl. The high 2,4-D-mineralizing activity of J9U_2,4-D in high-salt environments highlights the potential of this strain for the <i>in situ</i> bioaugmentation of high-salinity organic wastewater. Our strategy of combining extremophiles with synthetic biology may be utilized to create stress-resistant degraders for the bioremediation of polluted extreme environments.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 5","pages":"1289–1297 1289–1297"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143921284","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}

{"title":"Chemical–Biological Process Based on H2O2/O3 Lysis and Cryptic Growth for the In Situ Reduction of Waste Activated Sludge","authors":"Zhu Liang,&nbsp;Jianjun Zhang,&nbsp;Yingfei Sun,&nbsp;Xinyu Nie,&nbsp;Chengzhi Zhu,&nbsp;Kaimin Shih,&nbsp;Bohua Wen,&nbsp;Xiao-yan Li and Lin Lin*,&nbsp;","doi":"10.1021/acsestengg.4c0089310.1021/acsestengg.4c00893","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00893https://doi.org/10.1021/acsestengg.4c00893","url":null,"abstract":"<p >In addressing the expensive transportation and disposal cost of the waste activated sludge (WAS), an in situ sludge reduction strategy was developed in this study based on H₂O₂/O₃ lysis and a cryptic growth process. The critical roles of sludge solubilization and biodegradability of sludge lysate were analyzed comprehensively. Under a dosage of 0.36 g O₃/g mixed liquor volatile suspended solids (MLVSS), H₂O₂ addition (H₂O₂/O₃ molar ratio was 0.25) led to a significant improvement of sludge cell lysis performance in terms of the MLVSS reduction ratio (35.2% vs 26.3%). Compared with O₃ alone, the sludge lysate treated with H₂O₂/O₃ exhibited a higher biodegradability, as the value of BOD₅/COD increased from 0.72 to 0.79, accompanied by mean specific rates of 6.71 and 7.42 h^–1, respectively. Reintroduction of the H₂O₂/O₃-treated sludge into the mainstream biological process facilitated further hydrolysis of oxidized sludge fragments, achieving an overall sludge reduction ratio of 29.1% without adversely affecting the effluent quality adversely. A pilot-scale experiment at 2.4 m³/d treatment capacity also demonstrated a similar sludge reduction performance of 28.1% in term of MLVSS. Economic analysis revealed that the net benefit of the in situ sludge reduction reached 132/t dry sludge (DS), highlighting the significant potential of the combined H₂O₂/O₃ method for effective sludge reduction.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 5","pages":"1279–1288 1279–1288"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143921283","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}

{"title":"Developing Physiologically Compatible Electron Donors for Reductive Dechlorination by Dissimilatory Iron-Reducing Bacteria Using Machine Learning","authors":"Yang Yu,&nbsp;Jiuling Li,&nbsp;De-Feng Xing,&nbsp;Chen Zhou,&nbsp;Jia Meng and Ang Li*,&nbsp;","doi":"10.1021/acsestengg.4c0084810.1021/acsestengg.4c00848","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00848https://doi.org/10.1021/acsestengg.4c00848","url":null,"abstract":"<p >Targeted biological stimulation of carbon sources presents considerable potential for enhancing dehalogenation efficiency at sites contaminated with halogenated hydrocarbons. Combining a natural cellulose-rich carbon source with iron and humic acid has been shown to accelerate reductive dechlorination by dissimilatory iron-reducing bacteria (DIRB) by increasing electron flow pathways. However, organic carbon release in natural environments involves complex interactions among carbon source types, electron transfer, and microbial metabolic activities, making traditional methods insufficient for optimizing carbon sources to accelerate microbial reductive dehalogenation. This study applies machine learning (ML) approaches to elucidate the biocompatibility between carbon source materials and the functional DIRB (<i>Shewanella oneidensis</i> MR-1). Biostimulation conditions and biostimulatory genomic data were used as input variables, with dechlorination effect as the output. The gradient boosting decision tree (XGB) outperformed the random forest (RF), artificial neural network (ANN), and support vector machine (SVM) in assessing the biological dechlorination potential. Feature importance analysis using the optimized XGB model highlighted carbohydrate metabolism and energy metabolism as the primary factors influencing the dechlorination of <i>S. oneidensis</i> MR-1. Insights from ML guided the development of a custom carbon source with higher acetic acid content, leading to a 22% improvement in dechlorination rate and a ∼60–82% reduction in costs. This approach provides a robust framework for designing compatible carbon sources for contaminated sites, grounded in an understanding of microbial physiological functions.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 5","pages":"1191–1201 1191–1201"},"PeriodicalIF":7.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143921282","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}

{"title":"Advancing Bioflocculants for Sustainable Harmful Algal Bloom Control: Mechanisms, Applications, and Resource Valorization","authors":"Yang Yang,&nbsp;Cancan Jiang*,&nbsp;Xu Wang,&nbsp;Yawen Xie,&nbsp;Danhua Wang,&nbsp;Shengjun Xu and Xuliang Zhuang*,&nbsp;","doi":"10.1021/acsestengg.4c0075310.1021/acsestengg.4c00753","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00753https://doi.org/10.1021/acsestengg.4c00753","url":null,"abstract":"<p >Harmful algal blooms (HABs) are a growing global problem that endangers ecosystems and public health and urgently needs to be controlled. The use of microbial bioflocculants for bioflocculation is an emerging technology that rapidly aggregates algal cells through charge neutralization, adsorption bridging, and other mechanisms, all while preventing cell lysis. This method achieves algae removal, effectively mitigating harmful algal blooms and enabling the recovery of potential resources. This Review comprehensively analyzes recent advances in bioflocculant technology, focusing on flocculation mechanisms, influencing factors, and applications in HAB management and algal biomass harvesting. Strategies for enhancing bioflocculant performance, including modification, composite development, and optimization of production using low-cost substrates, are discussed. The valorization of harvested algal biomass through various pathways, such as bioenergy production, fertilizer generation, and high-value compound extraction, is explored, highlighting the potential for a circular bioeconomy approach. Current challenges in bioflocculant development and application are critically examined, including the need for mechanistic understanding, efficiency improvement, and cost reduction. Future research directions emphasize elucidating flocculation mechanisms, developing hyper-productive strains, advancing modification and composite techniques, and innovating algal biomass utilization methods. This Review aims to offer a timely assessment of bioflocculant technology’s current status and future prospects for sustainable HAB management and resource recovery. Its ultimate goal is to directly support ongoing initiatives in environmental protection and advance circular economy development.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 3","pages":"569–583 569–583"},"PeriodicalIF":7.4,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609010","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}