Journal of water process engineering最新文献

{"title":"Factors affecting vacuum ultraviolet (185 nm) emission intensities in low-pressure mercury lamp photoreactors for photolytic destruction of water contaminants","authors":"Eman Z. Alhamdan ,&nbsp;Daniel Spicer ,&nbsp;Ezra L. Cates","doi":"10.1016/j.jwpe.2025.107909","DOIUrl":"10.1016/j.jwpe.2025.107909","url":null,"abstract":"<div><div>Direct photolysis by 185 nm vacuum ultraviolet (VUV) photons emitted by low-pressure mercury (LP-Hg) lamps enables destructive treatment of water contaminants that resist degradation by conventional advanced oxidation processes. The treatment challenges associated with poly-/perfluoroalkyl substances, in particular, have renewed interest VUV photolysis, which offers a relatively simple and effective means of PFAS degradation. Since LP-Hg lamps have traditionally been used more widely in ultraviolet-C applications, output data and operational guidelines specific to VUV applications are more difficult to access or measure. Herein, we assessed perfluorobutanoic acid (PFBA) photodegradation efficiency using LP-Hg lamp systems from various manufacturers to gauge the variability in 185 nm output and isolate key design and operational aspects. Results indicated a wide variation in VUV output efficiency, with over a 90 % reduction in electrical energy per order destruction (EE/O) between the least and most effective combinations of lamp, ballast, and quartz sleeves, as a result of their physical design aspects. Furthermore, we found that output efficiency was significantly affected by the steady-state temperature achieved when submerged in the photoreactor, relative to the intended operating temperature of the lamp. Consequently, VUV intensity comparisons performed in an N₂-purged collimated beam with VUV radiometer were not useful predictors of relative performance when submerged in a photoreactor. The results also suggest that many past laboratory studies of VUV photolytic treatment approaches likely used sub-optimal lamp system configurations, resulting in misleading results with respect to the energy efficiency of VUV treatment.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107909"},"PeriodicalIF":6.3,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928079","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":"Synergistic mechanisms of 3D electrochemical processes and multi-oxidant integration for enhanced water purification","authors":"Qin Xue ,&nbsp;Chenlin Zhang ,&nbsp;Bin Wang ,&nbsp;Mehary Dagnew ,&nbsp;Jingwen Yu ,&nbsp;Xinmiao Zhang ,&nbsp;Chun Zhao","doi":"10.1016/j.jwpe.2025.107882","DOIUrl":"10.1016/j.jwpe.2025.107882","url":null,"abstract":"<div><div>Recent advancements in three-dimensional electrochemical processes (3DEPs) have demonstrated significant potential in the field of water purification. Compared with traditional two-dimensional electrochemical processes (2DEPs), 3DEPs offer several key advantages, including enhanced mass transport, increased active sites, and improved conductivity. Additionally, when coupled with other oxidants, the synergistic effects are further amplified through the generation of powerful free radical species (e.g., <span><math><mmultiscripts><mi>OH</mi><mprescripts></mprescripts><mspace></mspace><mo>•</mo></mmultiscripts></math></span>, <span><math><msubsup><mi>SO</mi><mn>4</mn><mrow><mo>•</mo><mo>−</mo></mrow></msubsup></math></span>, <span><math><msup><mi>Cl</mi><mo>•</mo></msup></math></span>, etc.) and non-radical species (<span><math><msub><mmultiscripts><mi>O</mi><mprescripts></mprescripts><mspace></mspace><mn>1</mn></mmultiscripts><mn>2</mn></msub></math></span>, reactive high-valence metal species, etc.), all of which play a crucial role in the removal of emerging pollutants from aqueous solutions and significantly reduce energy consumption. In this review, we meticulously revisit the definitions, historical timelines, and fundamental principles of 3DEPs from their inception. Subsequently, a detailed examination of the performance and mechanisms at play in 3DEPs when coupled with various oxidants is provided, addressing a noteworthy aspect frequently overlooked in existing literature reviews. Furthermore, different reactor designs are showcased to enhance comprehension and facilitate the practical application of 3DEPs in water treatment. Finally, prospects are discussed in light of the core content presented earlier.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107882"},"PeriodicalIF":6.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928082","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":"Mass transfer-enhanced continuous flow electrocatalytic hydrodechlorination of chlorinated organics using a Pd/N-Gr/NF electrode","authors":"Patrick Rugira,&nbsp;Shuang Pan,&nbsp;Mehvish Manzoor,&nbsp;Weiqi Huang,&nbsp;Xin Zhao,&nbsp;Can Wang","doi":"10.1016/j.jwpe.2025.107895","DOIUrl":"10.1016/j.jwpe.2025.107895","url":null,"abstract":"<div><div>Developing a novel electrocatalytic reactor system for the effective elimination of chlorinated organic pollutants (COPs) from water holds significant potential for environmental remediation. The integration of a continuous flow reactor (CFR) system with a Pd-based electrode (Pd/N-Gr/NF) is noteworthy, as it enhances the efficiency of electrochemical hydrodechlorination (EHDC) due to its exceptional ability to generate atomic hydrogen (H*). This study demonstrates the application of CFR in the EHDC system for the efficient removal of COPs. The continuous flow removal of various chlorophenols was investigated. Due to the CFR system's efficient mass transfer, 2-CP, 4-CP, 2,4-DCP, and 2,4,6-TCP achieved 100 % dechlorination efficiency in 60 min. The factors influencing EHDC, including pollutant initial concentration, pH, current density and catholyte volume, were evaluated. Phenol was identified as the predominant resultant of 2,4,6-TCP dechlorination. The analysis of hydrodechlorination paths and toxicity evaluation was conducted based on intermediate byproducts identified through LC-MS. The CFR system demonstrated effective performance in addressing wastewater containing hardness ions, humic acid (HA) and various chlorinated compounds. Additionally, the influence of temperature on the hydrodechlorination of 2,4,6-TCP and the system's stability was examined. The CFR demonstrated stability across 10 consecutive reuse cycles, suggesting its potential application in practical contexts.</div></div><div><h3>Environmental implication</h3><div>EHDC using Pd-based electrodes is a promising method for removing COPs from industrial wastewater. However, challenges such as Pd scarcity, high costs, complex electrode synthesis, and limited durability hinder its widespread application. This study introduces a CFR with a Pd/N-Gr/NF cathode that dechlorinates efficiently with modest Pd loading. The CFR system's excellent mass and electron transfer properties enable superior pollutant removal with reduced Pd usage, lower current consumption, and enhanced current efficiency. Additionally, the system demonstrates stability, cost-effective electrode fabrication, and the ability to treat complex water matrices, making it highly suitable for large-scale EHDC applications.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107895"},"PeriodicalIF":6.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923843","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":"The mitigation efficacy and mechanism for H2S and CH4 emission from wastewater by adding bacterium-fungus mixture","authors":"Zheng Qi,&nbsp;Tipei Jia,&nbsp;Wenjie Cong,&nbsp;Jinying Xi","doi":"10.1016/j.jwpe.2025.107889","DOIUrl":"10.1016/j.jwpe.2025.107889","url":null,"abstract":"<div><div>Anaerobic conditions in wastewater systems produce H₂S and CH₄, leading to pipeline corrosion and environmental risks. While various chemical solutions have been proposed, they often suffer from secondary pollution. This study developed and optimized a microbial strategy to reduce H₂S and CH₄ emissions by simultaneously adding yeast and bacterial strain. Optimal results were obtained with a 1:2 ratio of <em>Bacillus subtilis</em> to <em>Saccharomyces cerevisiae</em> at 10⁷ CFU/mL, achieving reductions of 65.8 % for H₂S and 62.4 % for CH₄. The addition of bacterium-fungus mixture altered carbon and sulfur metabolic pathways, community structure, and functional gene abundance, which ultimately reduced H₂S and CH₄ emissions. Specifically, the increase in redox potential leads to the accumulation of other sulfur compounds such as S₂O₃²⁻. Additionally, elevated concentrations of long-chain fatty acids and decreased acetate concentrations limited the substrates required for CH₄ production. Community structure and metagenomic analyses confirmed these changes, showing reduced relative abundances of sulfate-reducing bacteria, methanogens, and associated functional genes, as well as increased genes abundance associated with organic sulfur synthesis and propionate/butyrate production. These findings demonstrate that addition of bacterium-fungus mixture can effectively modulate microbial community structure and metabolic pathways, offering a viable strategy for reducing H₂S and CH₄ emissions in wastewater.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107889"},"PeriodicalIF":6.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928077","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":"Electrocatalytic membrane-driven ozonation to reconstruct the extracellular polymeric substance for enhanced sludge dewatering","authors":"Yantao Song ,&nbsp;Wei Zhang ,&nbsp;Zhenao Gu ,&nbsp;Yu Cheng ,&nbsp;Haihua Bao ,&nbsp;Jiaqi Wang ,&nbsp;Ning Wang ,&nbsp;Yuting Liu ,&nbsp;Zongqiang Zhu ,&nbsp;Chengzhi Hu","doi":"10.1016/j.jwpe.2025.107768","DOIUrl":"10.1016/j.jwpe.2025.107768","url":null,"abstract":"<div><div>Modern wastewater treatment plants safeguard water environment but generate enormous waste activated sludge (WAS), posing significant environmental risks. Conventional WAS conditioning methods require intensive chemical dosages to alter EPS structures, leaving behind heavy metal ions and polymeric residues that complicate subsequent disposal processes. Herein, we proposed an electrocatalytic membrane (EM) system integrating O₃ aeration with catalytic ozonation, achieving a 47.2 % improvement in sludge dewatering properties. Reactive oxygen species (ROS) with redox potentials ranging from 0.33 to 2.70 V vs NHE were generated and ensured efficient sludge conditioning. Moderate oxidation was achieved by regulating the O₃ dosage (8.21 mg/g VSS), which reconstructed the extracellular polymeric substance (EPS) while avoiding excessive release of TB-EPS and intracellular organic matters arising from cell lysis. The increased protein/polysaccharide ratio and hydrophobicity of the sludge contributed to the enhanced dewatering performance. Moreover, Fe residuals from the catalyst were effectively reduced during the EM-facilitated electrocatalytic ozonation of the sludge, making it ideal for subsequent disposal and reuse. This approach provides a green solution for sludge conditioning, minimizing oxidant dosage and heavy metal residuals, representing a critical step in advancing wastewater treatment toward low-carbon, sustainable resource recovery.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107768"},"PeriodicalIF":6.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923438","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":"One-pot facile synthesis of ruthenium nanoparticles with Co3O4 support at room temperature to enhance the catalytic efficiency in 4-nitrophenol reduction","authors":"Merve Yelboğa ,&nbsp;Merve Akbayrak","doi":"10.1016/j.jwpe.2025.107866","DOIUrl":"10.1016/j.jwpe.2025.107866","url":null,"abstract":"<div><div>This study reports the synthesis of ruthenium-doped Co₃O₄ nanoparticles (Ru/Co₃O₄ NPs) via a one-pot, room-temperature method and the usage for 4-Nitrophenol (4-NP) reduction reaction. The catalyst was characterized by advanced analytical techniques such as transmission electron microscopy (TEM), field emission scanning electron microscopy (FE–SEM), energy-dispersive X-ray spectroscopy (EDX), inductively coupled plasma optical emission spectrometry (ICP-OES), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The reaction conditions were optimized by studying the effects of catalyst amounts, concentration of 4-NP and NaBH₄ on the reaction. Ru/Co₃O₄ catalyst exhibits high performance in the reduction of 4-NP to 4-aminophenol (4-AP). Ru/Co₃O₄ NPs achieve 0.05 s⁻¹ reaction rate and 159.03 h⁻¹ turnover frequency value. The catalyst completes full conversion of 0.08 mM and 0.40 mM solution of 4-NP within 60 s and 110 s, respectively. The Ru/Co₃O₄ NPs, containing just 0.05 mg of Ru, demonstrated excellent efficiency by converting 10.0 mg of 4-NP in 6.5 mL of water which is far exceeding the permissible limit of 10 μg/L. Ru/Co₃O₄ NPs also demonstrate excellent stability and retain its activity up to 150 cycles which shows its potential for long-term use in sustainable environmental applications. This enhanced catalytic performance exhibits its potential for rapid and effective remediation of nitroaromatic contaminated wastewater.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107866"},"PeriodicalIF":6.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923839","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 bioinspired ladder-like harp Fog Water Collector. I. Model design, simulations and laboratory testing","authors":"Carlos M. Regalado ,&nbsp;Carlos Fariña Carballo ,&nbsp;María Teresa Arencibia","doi":"10.1016/j.jwpe.2025.107884","DOIUrl":"10.1016/j.jwpe.2025.107884","url":null,"abstract":"<div><div>A bioinspired three-dimensional fog collector composed of harp-like filament strips arranged in a ladder shape is proposed as an alternative structurally stable devise for fog water harvesting. The 3D-printed models were tested inside an instrumented wind tunnel. The length, diameter, geometry, surficial microtexture of the filaments, solidity, inclination, number of rows, and curvature of the model's strips were optimized through a series of experiments with artificial fog. The optimum filaments were 5-cm-long smooth conical cylinders (0.6° conicity), with a diameter of 1.5 mm at the circular base, ending on an acute pointing tip. A 60° inclination of the filament screen improved 1.5-fold the fog water collection yield with respect to that obtained using the screen positioned vertically. In addition, although the collection yield increased with the screen curvature (either concave or convex), this improvement was compensated if corrected by the number of filaments, i.e., equal projected shading. Fog water yield was 1.5-times higher as the number of overlapping impacting screens increased from 1 up to 4. However, not much improvement was achieved beyond the third layer, such that the fog water collection leveled off up to a plateau after this. A sequence of screens comprising smooth conical slender filaments with an intermediate shading coefficient (SC ≈ 35 %; 2.7 mm center-to-center spacing) and distributed in partly overlapping parallel rows was found to render maximal water yield with an efficiency of 10–20 % (at wind velocities between 2 and 6 m s⁻¹).</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107884"},"PeriodicalIF":6.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923840","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 visible-light-induced degradation of antibiotic and dye pollutants in water bodies using a 2D Ti3C2 MXene-supported CoAl-LDH/Bi2MoO6 ternary heterostructure with a synergistic 2D/2D/2D hybrid configuration and S-scheme charge transfer","authors":"Dong-Eun Lee ,&nbsp;Satyanarayana Moru ,&nbsp;Wan-Kuen Jo ,&nbsp;Surendar Tonda","doi":"10.1016/j.jwpe.2025.107868","DOIUrl":"10.1016/j.jwpe.2025.107868","url":null,"abstract":"<div><div>Environmental remediation requires the development of advanced photocatalysts for the removal of persistent organic pollutants, including antibiotics and dyes. In the present study, we report the design and fabrication of a novel ternary hybrid photocatalyst consisting of a CoAl layered double hydroxide (LDH), Bi₂MoO₆ (BMO), and the MXene Ti₃C₂ (TC) for the effective degradation of the antibiotic sulfamethoxazole (SLF) and the organic dyes Congo red and indigo carmine under visible light illumination. Characterization of the ternary photocatalyst revealed a well-integrated 2D/2D/2D heterostructure with optimized interfacial interactions, enhanced light-harvesting capabilities, and superior charge-carrier dynamics. The optimized LDH/BMO20/TC photocatalyst achieved exceptionally high degradation rates for the antibiotic and dyes with high mineralization rates, significantly outperforming the binary photocatalyst and individual components. This enhanced photocatalytic activity was attributed to an S-scheme mechanism that promoted selective recombination at the interface while preserving the strong reducing ability of CoAl-LDH and the strong oxidizing capacity of BMO. Electron spin resonance analysis confirmed the production of O₂^•− and ^•OH radicals, while <em>in-situ</em> light-irradiated X-ray photoelectron spectroscopy identified charge redistribution, providing compelling evidence for the proposed S-scheme mechanism. Ti₃C₂ also served as an electron mediator, enhancing charge separation, accelerating electron transport, and stabilizing the heterostructure. The developed ternary catalyst exhibited exceptional reusability and robust activity across varying pH conditions and water matrices, demonstrating its potential as a versatile and sustainable photocatalyst for advanced environmental remediation and wastewater treatment.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107868"},"PeriodicalIF":6.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923842","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":"Demulsification characteristics of electrostatic–swirling coupling enhanced migration","authors":"Guidong Chen,&nbsp;Silong Feng,&nbsp;Shuo Liu,&nbsp;Lin Li,&nbsp;Xiangyi Long,&nbsp;Qiang Yang,&nbsp;Hao Lu","doi":"10.1016/j.jwpe.2025.107814","DOIUrl":"10.1016/j.jwpe.2025.107814","url":null,"abstract":"<div><div>Currently, achieving efficient demulsification of water-in-oil emulsions using physical methods is a great challenge in the field of oil–water separation. Herein, an electrostatic–swirling demulsifier, designed based on the principle of enhancing droplet migration through electrostatic–swirling coupling was combined with electrode insulation modification to regulate the droplet capture mode. Through multiphysics simulations and experimental tests, it was first clarified that the electric field force dominates the migration of water droplets to the side wall in the electrostatic–swirling coupling. The electric field force is 1.43-4.11 times of the centrifugal force. Secondly, the relationship between the migration trajectory of droplets, electric field, surface charge density, and continuous phase characteristics was articulated. The migration trajectory is affected by various factors. As the voltage (1 kV to 8 kV), surface charge density (1 × 10^-5C/m² to 5 × 10^-5C/m²) and continuous phase viscosity (11 cP to 6 cP) change, the migration time and angle of water droplets decrease significantly, from 52 ms and 210° to 14 ms and 50°, respectively. This shift causes the “collision site” to move far away from the continuous phase outlet, enabling the insulating modified film on the side wall to quickly capture and separate the water droplets. Further investigation into the macroscopic demulsification characteristics revealed that the separation efficiency of the dual-field coupling electrode insulation modification system increased from 11.84 % to 95.75 % after applying 5 kV voltage to the emulsions containing 600–2200 mg/L water. This study provides a new approach for compact and efficient demulsification of oil–water emulsions.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107814"},"PeriodicalIF":6.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917666","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":"Enhanced degradation of polyvinyl alcohol-containing desizing and vinylon wastewater by spiral symmetrical stream anaerobic bioreactors: Efficiency and pathway analysis","authors":"Qianyi Su,&nbsp;Zikang Yang,&nbsp;Luotong Ren,&nbsp;Xiaoya Gao,&nbsp;Fangyuan Liu,&nbsp;Xiaoguang Chen","doi":"10.1016/j.jwpe.2025.107861","DOIUrl":"10.1016/j.jwpe.2025.107861","url":null,"abstract":"<div><div>The existing treatment process for polyvinyl alcohol (PVA)-containing desizing and vinylon wastewater is characterized by high operational costs and low shock load resistance, which is a problem hindering the green development of textile industry. This study evaluated the performance of each treatment stage in actual engineering projects, identifying the inefficiency of the anaerobic section as the primary bottleneck. The adsorption effect of the granular sludge was found to dominate over its biodegradation capacity. The Spiral Symmetry Stream Anaerobic Bioreactor (SSSAB) demonstrated effective degradation of PVA-containing desizing and vinylon wastewater, achieving a volumetric loading rate (VLR) of 5.96 kg COD/(m³·d) and a chemical oxygen demand (COD) removal rate of up to 43.3 %. The anaerobic biodegradation mechanism of PVA-containing desizing and vinylon wastewater was elucidated. The main organic matter in the influent and effluent water of the SSSAB consisted of benzene, which accounted for 78.2 % and 88.5 % of the total organic matter, respectively. The addition of carbon nanotubes (CNTs) was shown to enhance the stability and volumetric removal efficiency (VRE) of the SSSAB system in treating PVA-containing desizing and vinylon wastewater, increasing the average volumetric removal rate from 0.72 kg COD/(m³·d) to 1.77 kg COD/(m³·d). CNTs also improved the zeta potential of the granular sludge and the characteristics of extracellular polymeric substances (EPS). These findings provide novel insights and empirical data to support the scaling-up of the SSSAB for treating high-concentration PVA-containing desizing and vinylon wastewater.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"75 ","pages":"Article 107861"},"PeriodicalIF":6.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917665","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}