Journal of water process engineering最新文献

{"title":"Micro-aeration strategies: Optimizing nitrogen and phosphorus removal in vertical flow constructed wetlands for rural sewage treatment","authors":"Li Sun ,&nbsp;Zhenzhou Cao ,&nbsp;Shuaiwen Jia ,&nbsp;Panyue Zhang ,&nbsp;Guangming Zhang","doi":"10.1016/j.jwpe.2025.107931","DOIUrl":"10.1016/j.jwpe.2025.107931","url":null,"abstract":"<div><div>Dissolved oxygen (DO) is a pivotal factor influencing the performance of constructed wetlands (CWs). This study explores how DO enhances pollutant removal, plant growth, and microbial dynamics in vertical flow constructed wetlands (VFCWs) treating rural sewage. The results showed that the aerobic system achieved peak efficiencies of 77.9 % COD, 76.9 % NH₄⁺-N, and 71.6 % TN, surpassing those of the microaerobic (72.1 % COD, 65.3 % TN) and anoxic (64.8 % COD, 58.2 % TN) systems. The growth of plants within this system increased, reflecting enhanced rhizosphere engineering via DO-mediated microbial activity. Iris height increased by 342.5 % under aerobic conditions, which was linked to rhizosphere EPS mineralization (218.64 μg/mL in roots vs. bulk substrate). The EPS concentration gradient (rhizosphere &gt; bulk substrate) indicates that microbial activity is concentrated near roots under aerobic conditions. This observation suggests a feedback loop between DO availability and microbial metabolism, where aerobic conditions increase organic matter mineralization and EPS consumption, promoting stable plant-microbe interactions. The VFCWs-aerobic system facilitated a shift in the microbial community structure, promoting the growth of bacteria known to be involved in pollutant removal. High DO increased the abundance of Proteobacteria (56 % vs. 24 % under anoxic conditions) and enriched Nitrospira (4.6 % vs. 0.3 %), enhancing nitrification. These findings highlight the crucial role of high DO concentrations in maintaining robust microbial activity for effective pollutant removal in VFCWs. This DO-driven strategy offers a low-cost, scalable solution for decentralized rural wastewater treatment, balancing microbial activity and plant-mediated nutrient uptake without complex infrastructure.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107931"},"PeriodicalIF":6.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of a novel coffee husk-derived biochar-supported Ce2Sn2O7-Sb2O3 composites for enhanced visible light-driven photocatalytic degradation of metronidazole and H2 production","authors":"Ismail Marouani ,&nbsp;Waqed H. Hassan ,&nbsp;Pradeep Kumar Singh ,&nbsp;Mudassir Hasan ,&nbsp;Mohamed Boujelbene ,&nbsp;Ibrahm Mahariq ,&nbsp;Phongpichit Channuie ,&nbsp;Farruh Atamurotov ,&nbsp;Jureeporn Yuennan ,&nbsp;M.A. Diab","doi":"10.1016/j.jwpe.2025.107935","DOIUrl":"10.1016/j.jwpe.2025.107935","url":null,"abstract":"<div><div>The integration of biomass-derived carbon materials with advanced photocatalysts enables sustainable environmental remediation and clean energy production. Herein, a novel Ce₂Sn₂O₇– Sb₂O₃/biochar (CSOSB/BC) S-scheme heterojunction photocatalyst was synthesized via a combination of wet-impregnation and hydrothermal method for visible-light-driven metronidazole (MTZ) degradation and hydrogen evolution. XRD, FTIR, XPS, and Raman, confirmed the formation of a well-dispersed heterostructure with strong interfacial interactions, enhancing charge transfer and reactivity. Electrochemical impedance spectroscopy (EIS), transient photocurrent response, and Tauc plots, demonstrated the significant role of biochar in enhancing photocatalytic performance. These analyses confirmed that biochar improves charge separation, facilitates electron transfer, and boosts reactive oxygen species generation, ultimately leading to higher efficiency in MTZ degradation. Under optimized conditions, the CSOSB/BC composite achieved 95 % MTZ degradation and 700 μmol g⁻¹H₂ production under visible-light illumination. The effects of catalyst dosage, pollutant concentration, and pH were systematically evaluated. Also, LC-MS analysis revealed multiple ring-cleavage intermediates, with toxicity assessment confirming a significant reduction in environmental hazards. The composite exhibited excellent stability, maintaining 86 % activity after six cycles with preserved crystallinity and chemical integrity. These findings establish CSOSB/BC as a high-performance, durable, and scalable photocatalyst, offering a promising solution for pharmaceutical wastewater treatment and sustainable hydrogen production with minimal ecological risks.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107935"},"PeriodicalIF":6.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of ZnWO4/Bi4O5I2 composite photocatalyst and study of its antibacterial properties","authors":"Ling Zhang ,&nbsp;Zixin Wang ,&nbsp;Ruolan Wei ,&nbsp;Tengyuan Gao ,&nbsp;Jingmei Li ,&nbsp;Luyin Zhao ,&nbsp;Deming Han ,&nbsp;Xiulong Li","doi":"10.1016/j.jwpe.2025.107913","DOIUrl":"10.1016/j.jwpe.2025.107913","url":null,"abstract":"<div><div>In this study, ZnWO₄ was produced hydrothermally, and a ZnWO₄/Bi₄O₅I₂ composite with photocatalytic characteristics was created via water bath calcination. Then, to confirm synthesis accuracy, the composite material was evaluated with X-Ray Diffraction Analysis (XRD), Scanning Electron Microscope (SEM), X-ray Photoelectron Spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and Ultraviolet-diffuse reflectance spectroscopy (UV–vis DRS). Photocatalytic antimicrobial studies were conducted under LED light. The results showed that the antibacterial efficiency of ZnWO₄/Bi₄O₅I₂ at a concentration of 1000 mg/L and a mass ratio of 15 % reached 100 % within 30 min against <em>Escherichia coli</em>, <em>Staphylococcus aureus</em>, <em>Pseudomonas aeruginosa</em>, and <em>Bacillus subtilis</em>, and 100 % within 90 min against <em>Candida albicans</em>. Furthermore, the antimicrobial efficacy of a 1000 mg/L 15 %-ZnWO₄/Bi₄O₅I₂ composite material against <em>Escherichia coli</em> was investigated under natural light circumstances, with an antimicrobial rate of 100 % reached in 30 min. The efficacy of this composite material to eliminate hazardous germs from livestock wastewater was also investigated. The present results demonstrate that the ZnWO₄/Bi₄O₅I₂ composite material has intense photocatalytic broad-spectrum antibacterial action. In addition, the MTT cytotoxicity test revealed that the ZnWO₄/Bi₄O₅I₂ composite material is not cytotoxic. The researchers investigated the composite material's antibacterial mechanism utilizing Reactive Oxygen Species (ROS) fluorescence measurements, membrane damage assessment, and free radical capture experiments. The findings revealed that reactive species (e⁻, h⁺, and ·OH) play a key role in photocatalytic antibacterial activity.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107913"},"PeriodicalIF":6.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel method for salt separation-crystallization and water recovery via photothermal evaporation","authors":"Yuxiao Ran,&nbsp;Lang Liu,&nbsp;Yanqiong Bao","doi":"10.1016/j.jwpe.2025.107877","DOIUrl":"10.1016/j.jwpe.2025.107877","url":null,"abstract":"<div><div>To address the challenges of salt interference and resource utilization difficulties in seawater desalination processes, there is an increasing demand for efficient separation of NaCl and Na₂SO₄. Inspired by the salt secretion mechanisms of mangrove ecosystems, we developed a cost-effective biomimetic system for salt separation and collection that synergistically integrates photothermal evaporation with ion-sieving processes and crystallization control mechanisms. This novel design achieves simultaneous separation and collection of NaCl at a single interface. The system demonstrates superior separation performance under high-salinity conditions, achieving a remarkable salt crystallization rate of 72 g m⁻² h⁻¹ in 20 wt% saline solution with a separation factor of 2.72 at a NaCl/Na₂SO₄ ratio of 3. The system maintained high-efficiency and stable operation during prolonged cycling experiments. By synergistically combining salt separation/collection with interfacial evaporation on a unified platform, this study presents an efficient and sustainable approach for salt fractionation that significantly advances the field of brine resource recovery.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107877"},"PeriodicalIF":6.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparative study on spinel ferrites-based Fenton-like oxidation systems for efficient treatment of polluted water: Experimental design and modeling","authors":"Masoumeh Golshan ,&nbsp;Babak Kakavandi ,&nbsp;Rasool Pelalak ,&nbsp;Yueping Bao","doi":"10.1016/j.jwpe.2025.107873","DOIUrl":"10.1016/j.jwpe.2025.107873","url":null,"abstract":"<div><div>The severely limited reaction rate of Fe³⁺ with hydrogen peroxide (H₂O₂, HP) poses a significant challenge in the Fenton reaction. Despite this, the design and construction of the active site are key factors for developing novel strategies in Fenton-like reactions due to the enhanced activation of HP. In this context, understanding the extent of catalytic activity in ferrites-induced Fenton-like degradation has become a critical area of research. Herein, the oxidation process of Reactive Deep Red 150 (RDR150), as a synthetic common textile dye, was investigated using copper ferrite (CuF₂O₄, CuFO) and cobalt ferrite (CoF₂O₄, CoFO) nanoparticles, which were pursued after being synthesized through simple operational methods. The CuFO/HP process realized a higher RDR150 (20 mg/L) removal efficiency (97.5 %) under the optimized conditions: 0.4 g/L of CuFO and 3.14 mM of HP within 35 min, as determined by the central composite design (CCD) modeling approach. In comparison, the pseudo-first-order RDR150 removal rate was calculated as 0.104 min⁻¹, 3.6 times higher than that of CoFO. The highly efficient catalytic reaction activity was attributed to the larger specific surface area, where CuFO nanoparticles were uniformly dispersed, as well as the synergistic effect arising from the cyclic degradation mediated by redox reactions of ≡Cu(I)/≡Cu(II), ≡Cu(II)/≡Cu(III), and ≡Fe(III)/≡Fe(II) as the active sites. Both radical (i.e., ^•OH and O₂^•−) and non-radical (i.e., ¹O₂) pathways contributed to the Fenton-like degradation of RDR150 in both systems; however, only a minor contribution from ^•OH compared to ¹O₂ and O₂^•− was observed in the CuFO/HP system, as evidenced by the tert-butyl alcohol (TBA) scavenging experiment. Moreover, 71.4 % of the RDR150 removal rate was maintained throughout three cycles of CuFO reuse in the catalytic decomposition of HP. The system demonstrated a consistently high removal rate in the presence of several common anions (Cl⁻, NO₃⁻, CO₃²⁻, and HCO₃⁻), except for SO₄²⁻, demonstrating the stability and adaptability of CuFO for potential application in natural environments. These results underscored the performance metrics of CuFO-activated HP and provided insights into the optimal strategy for enhancing catalytic performance, elucidating the underlying behaviors and mechanisms responsible for promoting its efficiency.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107873"},"PeriodicalIF":6.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Realistic and effective degradation of petroleum related contaminants in seawater using ecofriendly NiO and ZnO nanocomposites with ca-MCM-41: Assessment and remediation","authors":"Mashael D. Alqahtani ,&nbsp;Alshaima Sayed ,&nbsp;May N. Bin Jumah ,&nbsp;Nahaa M. Alotaibi ,&nbsp;Hassan A. Rudayni ,&nbsp;Ahmed A. Allam ,&nbsp;Mostafa R. Abukhadra","doi":"10.1016/j.jwpe.2025.107937","DOIUrl":"10.1016/j.jwpe.2025.107937","url":null,"abstract":"<div><div>A novel eco-friendly synthesis method was successfully developed to prepare calcium-doped mesoporous silica (Ca-MCM-41) from abundant natural limestone, effectively serving as a supporting framework for needle-like NiO and flake-like ZnO nanoparticles. Uniquely, phytochemically rich <em>Origanum majorana</em> (marjoram) extract was employed as a sustainable reducing and stabilizing agent to control nanoparticle growth, shape, and aggregation, providing enhanced stability and uniformity in the final composites (NiO@Ca-MCM and ZnO@Ca-MCM). Comprehensive characterization by different techniques confirmed the successful formation and distinctive morphological features of these nanostructures. Practically tested under realistic environmental conditions, the composites demonstrated remarkable photocatalytic activity, achieving complete mineralization of polycyclic aromatic hydrocarbons (PAHs) in heavily contaminated seawater samples from the Gulf of Suez. Quantitatively, ZnO@Ca-MCM exhibited superior performance, achieving 100 % removal of total PAHs within just 40 min at a catalyst loading of 0.8 g/L, while NiO@Ca-MCM achieved full mineralization within 80 min. The reaction was primarily driven by hydroxyl radicals, followed by superoxide radicals, elucidating a clear oxidation pathway. The significant outcomes from this study reveal the catalysts' potential for cost-effective and large-scale application in treating marine oil contamination. Given their high stability and recyclability, these composites offer a practical and scalable approach to addressing environmental pollution.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107937"},"PeriodicalIF":6.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable removal of boron and nitrate from agricultural irrigation water using natural sorbents: Optimization and mechanistic insights","authors":"Dámaris Núñez-Gómez,&nbsp;Pilar Legua,&nbsp;Vicente Lidón Noguera,&nbsp;Juan José Martínez-Nicolás,&nbsp;Juan Martínez-Tomé,&nbsp;Pablo Melgarejo","doi":"10.1016/j.jwpe.2025.107906","DOIUrl":"10.1016/j.jwpe.2025.107906","url":null,"abstract":"<div><div>Water contamination by boron and nitrates poses a critical challenge for agricultural sustainability, particularly in water-scarce regions. This study evaluates the effectiveness of natural zeolite, pumice, and almond shell as cost-effective sorbents for removing these contaminants from real irrigation water. Natural zeolite removed up to 98 % of boron and over 75 % of nitrate, while pumice and almond shell removed ≥50 % of nitrate. Adsorption occurred via physical or chemisorption mechanisms, depending on the sorbent. These findings highlight the potential of sustainable adsorbents to improve irrigation water quality, offering an eco-friendly alternative for agricultural water management.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107906"},"PeriodicalIF":6.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"UV synergistic magnesium oxide desulfurization waste residue for efficient decoloration of swine wastewater biochemical effluent","authors":"Tao Zhang,&nbsp;Lintong He,&nbsp;Xiaoyu Ou,&nbsp;Wei Wang,&nbsp;Dehan Wang","doi":"10.1016/j.jwpe.2025.107912","DOIUrl":"10.1016/j.jwpe.2025.107912","url":null,"abstract":"<div><div>The “Pollutant Discharge Standards for Livestock and Poultry Farming” (DB44/613–2024) establishes higher standards for effluent indicators, necessitating deep treatment of swine wastewater to comply with these standards. The prevalent Fenton process, while effective, incurs significant costs and produces substantial sludge volumes. Therefore, an advanced oxidation process utilizing magnesium oxide desulfurization waste residue (MDWR) as a sulfite source was investigated to treat swine wastewater biochemical effluent deeply. The results showed that the decoloration of biochemical effluent by MDWR alone under UV irradiation was low; however, adding Fe(II) significantly enhanced this process. The biochemical effluent's decoloration rate achieved 75.53 % at an initial pH of 5, with 0.6 g/L Fe(II) and 6.0 g/L MDWR. Furthermore, the decoloration efficacy of MDWR was superior to that of Na₂SO₃ and CaSO₃ as sulfite sources. In addition, MDWR can effectively degrade COD, TN, and TP under UV and Fe(II) enhancement so that the effluent can meet the discharge standard. Finally, the quenching experiments, three-dimensional fluorescence, and GC–MS spectra indicated that the decoloration effect of the system primarily resulted from the oxidative degradation of humic acids in biochemical effluent, with SO₄^•− identified as the most dominant radical. This study predominantly provides an innovative and economical method for deeply treating swine wastewater biochemical effluent.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107912"},"PeriodicalIF":6.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arsenite biosorption from contaminated water using live and dead biomass of marine Lysinibacillus sphaericus strain AsRPSD99: A modeling-based approach","authors":"Ranjan Kumar Mohapatra ,&nbsp;Subhashree Rath ,&nbsp;Manoranjan Nayak ,&nbsp;Pankaj Kumar Parhi ,&nbsp;Sony Pandey ,&nbsp;Chitta Ranjan Panda ,&nbsp;Hrudayanath Thatoi ,&nbsp;Youngsoo Han ,&nbsp;Younggyun Choi","doi":"10.1016/j.jwpe.2025.107905","DOIUrl":"10.1016/j.jwpe.2025.107905","url":null,"abstract":"<div><div><em>Lysinibacillus sphaericus</em> strain AsRPSD99 was isolated from sea sediment and found to be high salt-tolerant (up to 11 % NaCl) and multiple metal-resistant. The AsRPSD99 strain exhibited significant resistance to As(III) (1550 mg·L⁻¹) and As(V) (3500 mg·L⁻¹) and was effective for biosorption of arsenite in both living and dead conditions. Statistical and mathematical methods including central composite design-response surface methodology, kinetic, isotherm, and thermodynamic models have optimized and assessed batch-mode arsenite biosorption mechanisms. As(III) removal varied from 97.6 % to 56.3 % with living biomass and 95.9 % to 54.3 % with dead biomass at the optimal conditions (pH 6.5, temperature 32 °C, NaCl 2 %, agitation 120 rpm) at initial concentrations of 100 to 500 mg·L-1. Maximum As(III) uptake of 281.6 ± 10.4 mg and 271.8 ± 10.3 mg per 1 g of live and dead biomass was achieved at 500 mg·L⁻¹. As(III) biosorption aligns well with Langmuir isotherm (R²: 0.99), pseudo-second-order (R²: 0.96–0.98), and intraparticle diffusion kinetic models (R²: 0.94–0.98), indicating a two-stage monolayer surface chemisorption and intercellular accumulation process. The thermodynamic modeling indicates an endothermic (ΔH^o: +122.02 kJ·mol⁻¹) adsorption mechanism. Fourier transform infrared spectroscopy, field emission scanning electron microscopy with energy-dispersive X-ray analyses, transmission electron microscopy, X-ray diffraction spectroscopy, and X-ray photoelectron spectroscopy confirmed arsenite ion adsorption, ion exchange, and micro-precipitation via cell surface functional ligands. Transmission electron microscopy showed arsenite ions in and around living bacteria. These findings may aid large-scale biomass production and application of AsRPSD99 to treat arsenic-polluted water.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107905"},"PeriodicalIF":6.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Internal circulation electrolysis for ammonia disinhibition in stabilization of sludge autothermal thermophilic aerobic digestion","authors":"Hanlin Liu,&nbsp;Haiping Yuan,&nbsp;Yangyang Liu,&nbsp;Huabo Gong,&nbsp;Nanwen Zhu","doi":"10.1016/j.jwpe.2025.107907","DOIUrl":"10.1016/j.jwpe.2025.107907","url":null,"abstract":"<div><div>Ammonia inhibition poses a significant challenge in autothermal thermophilic aerobic digestion (ATAD), limiting the efficiency of sludge stabilization. This study proposed an innovative strategy integrating internal circulation electrolysis with ATAD to alleviate ammonia accumulation and enhance stabilization of sludge. The optimal electrolytic parameters were determined as a voltage of 6.44 V, electrode distance of 0.79 cm, and reaction time of 55.92 min with response surface methodology (RSM), achieving a total ammonia nitrogen (TAN) removal efficiency of 32.44 % ± 1.31 %. The stabilization time of sludge reduced from 20 days to 8 days when coupling electrolysis with ATAD at a sludge circulation ratio of 7.5: 1 compared with that of conventional ATAD. Mechanistic analysis revealed that the coupling system promoted microbial activity by enriching denitrifying genus (e.g., <em>Luteimonas</em>) and upregulated functional genes associated with nitrogen metabolism (e.g., <em>glnA</em> and <em>gltB</em>), enhancing ammonia assimilation into glutamine pathways. Additionally, reactive oxygen species (ROS) induced from electrolysis facilitated cell lysis and ammonia oxidation, further mitigating inhibition. These findings demonstrate that internal circulation electrolysis could effectively address ammonia inhibition in ATAD process, offering a sustainable solution for rapid sludge stabilization with minimized operational complexity.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107907"},"PeriodicalIF":6.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}