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Structure-dependent removal of aromatic organophosphate flame retardants by combined adsorption and electrochemical oxidation.
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-20 DOI: 10.1080/09593330.2026.2749015
Antoine P Trzcinski, Kouji H Harada
{"title":"Structure-dependent removal of aromatic organophosphate flame retardants by combined adsorption and electrochemical oxidation.","authors":"Antoine P Trzcinski, Kouji H Harada","doi":"10.1080/09593330.2026.2749015","DOIUrl":"https://doi.org/10.1080/09593330.2026.2749015","url":null,"abstract":"<p><p>The removal of aromatic organophosphate flame retardants (OPFRs) from water remains a significant challenge due to their persistence, hydrophobicity, and resistance to conventional treatment processes. In this study, a combined adsorption-electrochemical oxidation system using graphite intercalation compound (GIC) was evaluated for the removal of five representative aromatic OPFRs: triphenyl phosphate (TPP), 2-ethylhexyl diphenyl phosphate (EHDPP), cresyl diphenyl phosphate (CDPP), tricresyl phosphate (TCP), and tris(4-tert-butylphenyl) phosphate (TTBP). Batch adsorption experiments showed rapid initial removal governed by pseudo-second-order kinetics, indicating that surface interactions dominate the adsorption process. Adsorption capacity and rate varied among compounds, with more hydrophobic OPFRs exhibiting faster removal and lower residual concentrations. Cyclic adsorption-regeneration experiments demonstrated that overall performance is strongly dependent on electrochemical conditions. At low current (0.5 A), regeneration was incomplete and partially governed by desorption, whereas increasing the current to 3 A resulted in higher Apparent Oxidative Removal (AOR) values, lower residual concentrations and more stable treatment performance over successive cycles. Under optimal conditions (3 A, 20 min regeneration), several OPFRs were reduced to concentrations below the GC-MS detection limits, and all compounds were reduced to concentrations below 5 µg L<sup>-1</sup>. Mechanistic analysis revealed that adsorption dominates initial removal, while electrochemical oxidation is essential for regenerating adsorption sites and preventing contaminant release. The combined GIC-electrochemical system offers a synergistic and effective approach for the treatment of aromatic OPFRs, with performance governed by compound structure, hydrophobicity, and operating conditions. These findings provide new insights into adsorption-electrochemical processes for the removal of persistent organic contaminants.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-15"},"PeriodicalIF":2.2,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149227560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of C/N ratio and carbon-source composition on nutrient removal in a dual-sludge membrane bioreactor system (A2N-MBR).
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-20 DOI: 10.1080/09593330.2026.2748454
Xiaobo Wang, Xiaozheng Bian, Linchao Wen, Gupeng Zhang, Bifeng Cui, Jianqin Ma
{"title":"Effects of C/N ratio and carbon-source composition on nutrient removal in a dual-sludge membrane bioreactor system (A<sub>2</sub>N-MBR).","authors":"Xiaobo Wang, Xiaozheng Bian, Linchao Wen, Gupeng Zhang, Bifeng Cui, Jianqin Ma","doi":"10.1080/09593330.2026.2748454","DOIUrl":"https://doi.org/10.1080/09593330.2026.2748454","url":null,"abstract":"<p><p>Microbial competition that is driven by substrates plays an essential role in the stable denitrifying phosphorus removal (DPR) of low carbon wastewater treatment. This paper used a dual-sludge membrane bioreactor (A<sub>2</sub>N-MBR) to evaluate C/N ratios of 3-6 using acetate, followed by a comparison of acetate, propionate and their mixture at C/N = 5. Stoichiometric analysis estimated substrate allocations among denitrifying polyphosphate-accumulating organisms (DPAOs), denitrifying glycogen-accumulating organisms (DGAOs) and denitrifying ordinary heterotrophic organisms (DOHOs), while 16S rRNA gene sequencing and Pearson correlation analysis characterised community composition and its associations with nutrient removal. At C/N = 5, stoichiometric estimates assigned 53% of anaerobic COD consumption and 82% of anoxic nitrate reduction to DPAOs, with nitrate and phosphate removal efficiencies of 76.93% and 77.00%, respectively. At C/N = 6, the estimated substrate allocations shifted towards DGAOs and DOHOs pathways. Phosphorus removal was not as consistent as nitrate removal. In the subsequent carbon source comparison at C/N = 5, the acetate propionate mixture improved reactor performance. As a result, the maximum nitrate and phosphate removal efficiencies were 91.72% and 88.50%, respectively. Correlation analysis indicated that <i>Thauera</i> and <i>Zoogloea</i> were associated with NO<sub>3</sub><sup>-</sup>-N and PO<sub>4</sub><sup>3-</sup>-P removal. Conversely, <i>Nitrospira</i> relative abundance was negatively associated with nitrate removal. All in all, these findings link substrate conditions with community composition and DPR performance within the respective C/N and carbon source comparisons.HighlightsEmployed a novel A<sub>2</sub>N-MBR system to investigate anoxic nitrate reduction and phosphate uptake.C/N ratios altered estimated substrate allocations among microbial pathways.Acetate-propionate (1:1) improved nitrate and phosphate removal.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-15"},"PeriodicalIF":2.2,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149227539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Digestate reuse as an intermittent bio-stimulant for municipal sludge anaerobic digestion: full-scale evidence, biochemical methane potential assessment, and semi-continuous validation.
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-20 DOI: 10.1080/09593330.2026.2748455
Kai-Lung Cheng, Kai-Quan Gao, Wei-Xun Zheng, Ping-Heng Hsieh
{"title":"Digestate reuse as an intermittent bio-stimulant for municipal sludge anaerobic digestion: full-scale evidence, biochemical methane potential assessment, and semi-continuous validation.","authors":"Kai-Lung Cheng, Kai-Quan Gao, Wei-Xun Zheng, Ping-Heng Hsieh","doi":"10.1080/09593330.2026.2748455","DOIUrl":"https://doi.org/10.1080/09593330.2026.2748455","url":null,"abstract":"<p><p>Digestate reuse has been proposed as a strategy for enhancing anaerobic digestion (AD) performance; however, full-scale validation remains limited. This study evaluated digestate reuse for municipal sludge treatment through full-scale monitoring, biochemical methane potential (BMP) assays, semi-continuous continuous stirred-tank reactor (CSTR) experiments, and economic assessment. Operational data from two wastewater treatment plants revealed substantial differences in baseline digestion performance. BMP results showed that digestate reuse increased methane production by up to 28% and improved solids degradation in underperforming sludge, whereas limited benefits were observed in a well-performing system. Semi-continuous CSTR experiments demonstrated that intermittent digestate dosing at approximately 10% (v/v) improved total solids (TS) and volatile solids (VS) removal without compromising process stability. The enhancement effect persisted for 10-20 days following a single addition, suggesting that digestate acted primarily as a transient bio-stimulant rather than a conventional carbon source. Full-scale evaluation indicated that digestate reuse could reduce sludge disposal demand and generate net cost savings of approximately NT$100,000 (∼US$3,125) per month. These findings demonstrate that intermittent digestate reuse is a practical strategy for improving AD performance while supporting resource recovery and circular economy implementation.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-15"},"PeriodicalIF":2.2,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149227508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distillation-based treatment of unsaturated polyester resin wastewater for propylene glycol recovery.
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-20 DOI: 10.1080/09593330.2026.2749016
Truong Xuan Do, Thuy Thi Le, Thanh Van Nguyen, Hiep Hai Nguyen, Chinh Thi Huyen Dau, Vu Tung Lam Tran, Thi Tuyet Ngan Dang, Hai Hung Pham
{"title":"Distillation-based treatment of unsaturated polyester resin wastewater for propylene glycol recovery.","authors":"Truong Xuan Do, Thuy Thi Le, Thanh Van Nguyen, Hiep Hai Nguyen, Chinh Thi Huyen Dau, Vu Tung Lam Tran, Thi Tuyet Ngan Dang, Hai Hung Pham","doi":"10.1080/09593330.2026.2749016","DOIUrl":"https://doi.org/10.1080/09593330.2026.2749016","url":null,"abstract":"<p><p>This study evaluates distillation as an integrated treatment and resource recovery approach for wastewater generated from unsaturated polyester resin (UPR) production. An integrated experimental and modelling approach was developed to evaluate separation performance and support industrial process design. Laboratory experiments were conducted using a packed distillation column under different operating conditions, and a thermodynamic model based on vapour-liquid equilibrium data was developed and validated against experimental results. A continuous two-column distillation process was subsequently simulated and optimized using actual industrial UPR wastewater, with the total annualized cost as the optimization criterion. The system recovered water at 99.7% purity with a yield of 95%, while PG was obtained at 99.1% purity and 83.5% recovery efficiency at the lab scale. Recommended conditions for water separation were atmospheric pressure, 0.20 kW heat duty, and a reflux ratio of 0.25, whereas PG recovery achieved the highest performance under reduced pressure (<0.1 bar) with a reflux ratio of 1.8-2.0. The optimized industrial process achieved 86.63% overall valuable-chemical recovery using 9 and 22 theoretical stages for the water and phenol separation columns, respectively. The results demonstrate the feasibility of integrating validated process simulation with laboratory experiments for industrial wastewater treatment and resource recovery.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-14"},"PeriodicalIF":2.2,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149227575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient nitrogen elimination and microbial community characteristics in a sulfur-based autotrophic bioreactor at high nitrate loading. 高硝酸盐负荷下硫基自养生物反应器的高效除氮和微生物群落特征。
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-14 DOI: 10.1080/09593330.2026.2746058
Yuan Gao, Jie Ying
{"title":"Efficient nitrogen elimination and microbial community characteristics in a sulfur-based autotrophic bioreactor at high nitrate loading.","authors":"Yuan Gao, Jie Ying","doi":"10.1080/09593330.2026.2746058","DOIUrl":"https://doi.org/10.1080/09593330.2026.2746058","url":null,"abstract":"<p><p>This study systematically evaluated the nitrogen removal performance and microbial community characteristics of the sulfur-based autotrophic denitrification (SAD) process under various influent loads (15-140 mg N/L). After 22 days acclimation at 15 mg N/L, the system achieved >90% stable NO<sub>3</sub><sup>-</sup>-N removal. Notably, the system demonstrated exceptional stability at a high load of 140 mg N/L, with an average total nitrogen removal rate of 98% (peaking at 99%). This performance indicates a successful adaptation to elevated loading conditions. The high removal efficiency is attributed to the coordinated metabolic processes within the system. As the nitrate load increased, sulfur oxidation accelerated, releasing protons and causing a decline in pH. The ratio of sulfate production to nitrate removal (6.8-10 mg/mg) remained consistent with the theoretical value of 7.54 mg/mg, confirming the integrity of the sulfur metabolic pathway across various loading conditions. Furthermore, the nitrate load acted as a selective pressure, promoting the dominance of Pseudomonadota and <i>Thiobacillus</i> to establish a robust functional microbial ecosystem. In conclusion, this study confirms the viability of the SAD process for treating wastewater with medium to high nitrate concentrations. It also reveals the metabolic and community mechanisms that support performance stability under various load conditions.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-10"},"PeriodicalIF":2.2,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149180184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kinetic responses of enriched nitrifying systems to acute erythromycin and tetracycline exposure. 富集硝化系统对急性红霉素和四环素暴露的动力学响应。
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-07 DOI: 10.1080/09593330.2026.2730318
Tugce Katipoglu-Yazan, Emine Cokgor, Derin Orhon
{"title":"Kinetic responses of enriched nitrifying systems to acute erythromycin and tetracycline exposure.","authors":"Tugce Katipoglu-Yazan, Emine Cokgor, Derin Orhon","doi":"10.1080/09593330.2026.2730318","DOIUrl":"https://doi.org/10.1080/09593330.2026.2730318","url":null,"abstract":"<p><p>This study investigated the acute inhibitory impacts of two widely used antibiotics, erythromycin (ERY) and tetracycline (TET), on ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) within an enriched nitrifying culture. For this purpose, a lab-scale wastewater treatment system sustaining enriched nitrifiers was exposed to antibiotic concentrations ranging from 25 to 100 mg L<sup>-1</sup>. Model evaluations of oxygen uptake rate (OUR) evolution, together with ammonia and nitrite oxidation profiles, revealed distinct metabolic disruptions. ERY severely impaired the system, dropping overall nitrification efficiency to as low as 25% and halving the growth rates for both AOB and NOB. In contrast, TET exposure largely maintained overall nitrification performance with slightly reduced NOB activity. Under TET stress, the half-saturation constants for ammonia (K<sub>NH</sub>) and nitrite (K<sub>NO</sub>) increased to 32 and 2 mg N L<sup>-</sup><sup>1</sup>, respectively, indicating competitive inhibition and decreased substrate affinity. Both antibiotics reduced heterotrophic activity - more severely with ERY-triggering the release and utilisation of hydrolyzable biomass fractions. The results demonstrate that acute antibiotic toxicity and inhibitory impacts are markedly less pronounced in enriched nitrifying systems compared to conventional mixed activated sludge systems.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-10"},"PeriodicalIF":2.2,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149126991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Utilizing the nucleation activity of filamentous cyanobacteria to construct photogranules: treatment performance, formation process and recycling phycobiliprotein. 利用丝状蓝藻的成核活性构建光颗粒:处理性能、形成过程和藻胆蛋白的回收。
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-05 DOI: 10.1080/09593330.2026.2740060
Guoyu Zhang, Yiwen Ding, Shuyu Zhao, Yijun You, Yuanyuan Gao, Yixuan Yang, Haili Tan, Yi Ding, Jing Zhu, Zhipeng Li
{"title":"Utilizing the nucleation activity of filamentous cyanobacteria to construct photogranules: treatment performance, formation process and recycling phycobiliprotein.","authors":"Guoyu Zhang, Yiwen Ding, Shuyu Zhao, Yijun You, Yuanyuan Gao, Yixuan Yang, Haili Tan, Yi Ding, Jing Zhu, Zhipeng Li","doi":"10.1080/09593330.2026.2740060","DOIUrl":"https://doi.org/10.1080/09593330.2026.2740060","url":null,"abstract":"<p><p>This study characterizes the dynamic development process of photogranules, explores the role of related substances in their formation, and verifies the resource recovery potential in nitrogen and phosphorus removal from wastewater. The characteristics of photogranules were observed, and the nitrogen and phosphorus removal efficiency of the system was measured. The content of protein and polysaccharide in extracellular polymeric substances was determined over time. Excitation-emission matrix fluorescence was used to analyse the types and changes of substances in the system. Resource recovery assessments were conducted by adopting the method of freeze-thaw combined with trituration to extract phycocyanin and determine the content of phycobiliprotein. Photogranule development went through three sequential phases: initially, photogranules were under 1 mm in diameter, with peripheral filaments proliferating to create an irregular, meteorite-like surface; densification: loosely woven filaments contracted, increasing density and reducing surface pits, forming more compact structures; at maturation, granules reached approximately 1.3 mm and became spherical. The system achieved approximately 98% nitrogen and 56% phosphorus removal. Protein and polysaccharide content in extracellular polymeric substances increased slightly over time. Excitation-emission matrix fluorescence showed abundant humic-like substances in the early phase, while microbial byproducts and aromatic proteins remained stable later. The freeze-thaw combined with trituration yielded the highest concentration of phycocyanin (0.31 mg L<sup>-1</sup>), with phycobiliprotein content stable at about 50 mg L<sup>-1</sup>. This study describes photogranule growth characteristics, confirms the structural role of EPS, and demonstrates the dual functionality of photogranules in nutrient removal and resource recovery.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-15"},"PeriodicalIF":2.2,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149106085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electron beam irradiation for enhanced dewatering of dairy wastewater air flotation sludge: unravelling the demulsification and floc aggregation mechanism. 电子束辐照强化乳业废水气浮污泥脱水:揭示破乳和絮凝机理。
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-05 DOI: 10.1080/09593330.2026.2740753
Ge Tang, Jingyi Zhang, Jilai Lu, Liwei Mao
{"title":"Electron beam irradiation for enhanced dewatering of dairy wastewater air flotation sludge: unravelling the demulsification and floc aggregation mechanism.","authors":"Ge Tang, Jingyi Zhang, Jilai Lu, Liwei Mao","doi":"10.1080/09593330.2026.2740753","DOIUrl":"https://doi.org/10.1080/09593330.2026.2740753","url":null,"abstract":"<p><p>Dairy wastewater air flotation sludge (DWAFS) is resistant to conventional mechanical dewatering due to its high fat content and protein-stabilized emulsion structure. To address this challenge, this study employed electron beam (EB) irradiation as a pretreatment method. The effects of irradiation dose on sludge dewaterability were systematically investigated, and the multi-dimensional underlying mechanisms were elucidated through integrated multi-scale characterization. The results showed that EB irradiation significantly enhanced dewaterability, with 5 kGy identified as the optimal dose based on a combined evaluation of dewatering performance and specific energy consumption. EB irradiation was shown to efficiently disrupt the protein-stabilized emulsion, likely via water radiolysis-derived free radicals. This process is proposed to drive organic component transformation, surface charge neutralization, protein-lipid co-aggregation and floc reconstruction, ultimately contributing to the conversion of bound water to free water and enhanced dewaterability. These findings clarify the demulsification-dewatering coupling mechanism of EB irradiation on DWAFS and provide a theoretical basis for engineering application in high-fat oily sludge treatment.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-13"},"PeriodicalIF":2.2,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149105947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Integrated lignocellulolytic enzyme production and pretreatment of wheat straw by fungal consortium. 小麦秸秆木质素纤维素酶合成及真菌预处理研究。
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-01 Epub Date: 2026-09-17 DOI: 10.1080/09593330.2026.2729540
Rutu H Patel, Helina Patel
{"title":"Integrated lignocellulolytic enzyme production and pretreatment of wheat straw by fungal consortium.","authors":"Rutu H Patel, Helina Patel","doi":"10.1080/09593330.2026.2729540","DOIUrl":"10.1080/09593330.2026.2729540","url":null,"abstract":"<p><p>In nature, fungi play a leading role in the biodegradation of organic waste by secreting a broad spectrum of lignocellulolytic enzymes (cellulases, hemicellulases, and ligninases). Inspired by this natural ecological synergy, in the present study, two promising fungal isolates, <i>Trichoderma</i> sp. isolate HR27 and <i>Ganoderma</i> sp. isolate HR31, were isolated and assessed for biocompatibility. Subsequently, their consortium was utilized for single-factorial optimization of various parameters (inoculum size, incubation time, lignocellulosic substrate, temperature, moisture content, pH, surfactant, nitrogen source, co-substrate, and inducer) under solid-state fermentation (SSF) using lignocellulosic waste for enhanced lignocellulolytic enzyme production. The results revealed that a significant increase in enzyme yield was achieved by utilizing wheat straw as the substrate, supplemented with 1.5 g/L Tween 80 and 0.5 mM CuSO<sub>4</sub> in Asther's medium with an initial pH of 3.5 at 30˚C. Compared to unoptimized media, optimized media resulted in 5.99, 5.18, 1.13, 2.57, 4.97, and 2.68-fold increases in endoglucanase, exoglucanase, β-glucosidase, mannanase, xylanase, and laccase production, respectively, on the fourth day of fermentation. Compositional analysis revealed that enhanced enzyme production under optimized conditions resulted in 31.7% delignification of wheat straw; however, only 22.9% was observed under unoptimized conditions, compared to that of the raw substrate. The removal of lignin resulted in higher exposure of cellulose (43.25%) and hemicellulose (24.85%) contents in wheat straw under optimized conditions. These findings highlight the potential of the fungal consortium as an effective candidate for lignocellulolytic enzyme cocktail production for various industrial applications using agricultural waste with concurrent valorization of agro-waste.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3257-3279"},"PeriodicalIF":2.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148988611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative speciation and multi-index risk assessment of heavy metals in drinking-water, municipal wastewater, and industrial wastewater treatment sludges: implications for sustainable reuse. 饮用水、城市污水和工业废水处理污泥中重金属的比较形态和多指标风险评估:对可持续再利用的影响。
IF 2.2 4区 环境科学与生态学
Environmental Technology Pub Date : 2026-10-01 Epub Date: 2026-09-24 DOI: 10.1080/09593330.2026.2737838
Ming-Huang Wang, Edrafel Claudeen Mallorca-Manoy, Chiu-Wen Chen, Cheng-Di Dong
{"title":"Comparative speciation and multi-index risk assessment of heavy metals in drinking-water, municipal wastewater, and industrial wastewater treatment sludges: implications for sustainable reuse.","authors":"Ming-Huang Wang, Edrafel Claudeen Mallorca-Manoy, Chiu-Wen Chen, Cheng-Di Dong","doi":"10.1080/09593330.2026.2737838","DOIUrl":"10.1080/09593330.2026.2737838","url":null,"abstract":"<p><p>This study compared the concentrations, operationally defined chemical fractions, and screening-level environmental risks of Cu, Cr, Zn, Cd, Ni, and Pb in 20 dewatered sludge samples collected from drinking-water treatment plants (DWTPs; <i>n</i> = 3), municipal wastewater treatment plants (MWWTPs; <i>n</i> = 11), and industrial wastewater treatment plants (IWWTPs; <i>n</i> = 6) in Taiwan. A modified BCR sequential extraction procedure was used to separate acid-extractable (F1), reducible (F2), oxidizable (F3), and residual (F4) fractions. MWDWTP sludge contained comparatively high Zn and Cd concentrations, whereas several IWWTP samples showed elevated Cu, Cr, Ni, and Pb. Cu, Cr, Ni, and Pb were frequently associated with F3 and/or F4, while Zn and Cd showed substantial F2 contributions at several sites. Concentration-based indices identified marked enrichment at selected facilities, whereas fraction-based indices indicated that mobility depended on both metal and sludge category. High Igeo values therefore represent enrichment relative to background and do not necessarily indicate high immediate mobility when metals occur mainly in F3 or F4. These results support site-specific evaluation of total metal loads and chemical fractionation before sludge reuse, treatment, or disposal.</p>","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3342-3353"},"PeriodicalIF":2.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149037367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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