环境•农林最新文献

{"title":"Unraveling the effects of cerium oxide nanoparticles on the metabolism of anaerobic digestion of waste activated sludge†","authors":"Pabel Cervantes-Avilés, Weiwei Li and Arturo A. Keller","doi":"10.1039/D4EN01178C","DOIUrl":"10.1039/D4EN01178C","url":null,"abstract":"<p >To reduce the residual solids and increase energy recovery in wastewater treatment plants, the anaerobic digestion (AD) process needs to be optimized to generate more methane from waste activated sludge (WAS). Nanomaterials (NMs) have successfully been used in anaerobic digestion to increase methane production. Focusing on NMs with high redox activity, the biochemical route for methane production can be enhanced. Here, the influence of cerium oxide nanoparticles (CeO<small>₂</small> NPs) on the AD of waste sludge was evaluated in terms of metabolite production and assimilation, key enzyme activity, and organic matter transformation. The fate of CeO<small>₂</small> NPs in the anaerobic reactors was also determined <em>via</em> single particle ICP-MS and TEM imaging. Results indicated that 10, 50 and 100 mg of CeO<small>₂</small> NPs per g of volatile suspended solids (VSS) acted as a nanocatalyst during the anaerobic digestion of WAS, increasing the methane yield production to 8.9%, 11.3% and 14.2%, respectively. CeO<small>₂</small> NPs induced a decrease in the activity of two key enzymes involved in AD, protease and F420. Thus, biogas production was enhanced <em>via</em> the redox capability of the NPs. This includes the ability to perform extracellular electron transfer (EET) to hydrolyze long-chain substrates, <em>e.g.</em> proteins into amino acids, and short-chain organic acids such as maleic acid to shorter molecules and finally to methane. At the end of the nano-enhanced AD process, the CeO<small>₂</small> NPs remained in the biosolids. Therefore, potential effects of nanoceria on soil microorganisms and plants should be studied further.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":" 7","pages":" 3581-3591"},"PeriodicalIF":5.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Nanoscale hydroxyapatite-coated Cu-based nanopesticides exhibited promising benefits: enhanced application efficiency and plant element homeostasis†","authors":"Xin Liu, Jieyu Gao, Yaoyu Zhou, Shabin Liu, Hongqi Yang, Yuan Yang and Jian Yang","doi":"10.1039/D4EN01118J","DOIUrl":"10.1039/D4EN01118J","url":null,"abstract":"<p >Cu-based pesticides are globally popular owing to their low toxicity, high efficiency, broad applicability, and cost-effectiveness. Nevertheless, their use frequently results in waste accumulation and environmental concerns. Herein, we developed nanoscale hydroxyapatite as a Cu-based pesticide carrier and coated it with chitosan for achieving slow release of Cu/P. The HAP carriers with three sizes (20 nm, 60 nm, and 80 μm) and three types of Cu-based pesticides (OrganCu, InorganCu, and NanoCu) were prepared and compared. The nanopesticide (K60) prepared using the 60 nm HAP carrier and NanoCu commercial pesticide were proved with a particle size of less than 200 nm, and exhibited potential in long-term application performance. At low concentrations (10 mg kg<small>⁻¹</small>), NanoCu pesticides significantly affected the diversity of soil microorganisms. Notably, K60 decreased the negative influence on microorganism diversity compared with the original commercial pesticides, and improved alpha diversity and microbial species composition variation. Besides, K60 enhanced the phosphorus deficiency resistance of lettuces <em>via</em> the adjustment of microelement homeostasis. In particular, 5 μM K60 increased the Cu and P uptake in lettuce root by 77.81% and 76.12%, and increased the Mg and K uptake in root by 44.95% and 39.74%. The nanopesticide dosage exhibited more influence than the nanocarrier size on lettuce root ionome variation. Our research findings emphasize the implementation of sustainable strategies to enhance the utilization efficiency of commercial pesticides while mitigating ecological risks. These insights are expected to significantly contribute to the development of valuable concepts and serve as key references for the future market introduction of additional nanopesticides.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":" 7","pages":" 3681-3698"},"PeriodicalIF":5.8,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Advances in Mathematical Modelling, Mathematical Optimization and Simulation in Water Treatment","authors":"Moses Kayanda Kiteto,&nbsp;Cleophas Achisa Mecha,&nbsp;Martha Noro Chollom","doi":"10.1007/s11270-025-08159-9","DOIUrl":"10.1007/s11270-025-08159-9","url":null,"abstract":"<div><p>The ever-growing global need for clean water coupled with rampant pollution by emerging persistent contaminants, necessitates the use of advanced water treatment processes such as adsorption, advanced oxidation processes (AOPs) and membrane separation. These technologies, while effective, are often hindered by their reliance on sophisticated equipment, specialized materials, and complex chemical reactions, resulting in high costs and operational difficulties. Unlike previous studies, which primarily focused on technological aspects of the processes, this study takes a broader approach by analyzing of the entire process, proposing an innovative solution through the application of mathematical modelling, mathematical optimization and simulation techniques to enhance efficiency of water treatment processes. Mathematical modelling employed the Freundlich adsorption isotherm in adsorption, first order reaction kinetics in Advanced Oxidation Processes (AOPs) and Darcy – Hagen – Poiseuille equation, Carman – Kozeny equation, Nernst – Planck equation and solution – diffusion transport equation in microfiltration, ultrafiltration, nanofiltration and reverse osmosis respectively. The Newton’s method, direct differentiation and Simplex method was utilized in the optimization. The subsequent mathematical models and optimization techniques were applied to real world processes and simulated in C – programming language. The simulation results demonstrated optimality for the required adsorbent mass in adsorption, residence time and mass of catalyst in AOPs and effect of feed to pressure ratio on the operating flux in membrane separation processes. The findings of the study illustrate mathematical modelling and optimization and simulation as reliable approaches in the design and effective operation of advanced water treatment processes.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 8","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125764","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}

{"title":"A comparative study of Helianthemum and Citrullus Colocynthis Biomass as Low-Cost Biosorbents for Ce(III) and Gd(III) Removal from Aqueous Solutions","authors":"Ghada M. Almutairi,&nbsp;Reham Ali,&nbsp;Alaa M. Younis","doi":"10.1007/s11270-025-08142-4","DOIUrl":"10.1007/s11270-025-08142-4","url":null,"abstract":"<div><p>This study aimed to investigate the potential of <i>Helianthemum</i> and <i>Citrullus colocynthis</i> biomass as biosorbents for removing Ce(III) and Gd(III) ions. Various experimental parameters, including initial metal ion concentration, adsorbent dosage, and contact time, were examined to assess their impact on removal efficiency. The biosorption process was analyzed using isotherm and kinetics models. Samples underwent pretreatment to eliminate impurities and were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The Langmuir isotherm model exhibited a good fit for Gd(III) adsorption onto <i>Helianthemum</i> biomass, while it was unsuitable for Ce(III) adsorption. The isotherm models were employed to determine the optimal adsorption capacities of the biosorbents. <i>Helianthemum</i> biomass exhibited maximum adsorption capacities of 250 mg/g for Gd(III) and 103.09 mg/g for Ce(III), whereas <i>Citrullus colocynthis</i> biomass demonstrated capacities of 100 mg/g for Gd(III) and 66.62 mg/g for Ce(III). While the Freundlich isotherm model showed moderate agreement for both Gd(III) and Ce(III) adsorption onto <i>Citrullus colocynthis</i> biomass, it was inadequate for <i>Helianthemum</i> biomass. The adsorption of Gd(III) onto <i>Helianthemum</i> biomass was attributed to a chemisorption mechanism, indicating irreversible interactions between the metal ion and the adsorbent. In contrast, the adsorption of Ce(III) involved a physisorption process, allowing for the possibility of reversible desorption. The experimental data exhibited a better fit to the pseudo-first-order model for both Gd(III) and Ce(III) adsorption onto <i>Helianthemum</i> and <i>Citrullus colocynthis</i> biomass. The equilibrium adsorption capacities (qe) predicted by the model for <i>Helianthemum</i> biomass containing Gd(III) and Ce(III) were relatively similar to the experimental values. The regeneration and reuse of <i>Helianthemum</i> and <i>Citrullus colocynthis</i> biomass demonstrate high economic feasibility and environmental sustainability, with adsorption efficiencies of 85% and 77%, respectively, retained after three regeneration cycles using a mild 0.1 M HCl solution.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 8","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125805","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}

{"title":"Study on Bamboo Stalks as Green and Low-Priced Carbon Sources for Wastewater Denitrification","authors":"Xiaobing Hu,&nbsp;Xiaoyu Chen,&nbsp;Kaihao Zhai,&nbsp;Weiwei Song,&nbsp;Chaowei Liu,&nbsp;Yue Gao","doi":"10.1007/s11270-025-08135-3","DOIUrl":"10.1007/s11270-025-08135-3","url":null,"abstract":"<div><p>To address the issue of insufficient carbon sources in biological heterotrophic denitrification and to provide a green and low-cost alternative, this study investigated the feasibility of using bamboo stalks as a carbon source. Five types of bamboo stalks—<i>Phyllostachys pubescens</i> (Pp), <i>Phyllostachys sulphurea</i> (Ps), <i>Phyllostachys nigra</i> (Pn), <i>Dendrocalamus membranaceus</i> Munro (Dm), and <i>Bambusa glaucescens</i> (Bg)—were collected from eastern China. Their carbon release capacities and denitrification potentials were systematically evaluated. The results showed that bamboo contains higher integrated cellulose (59.06%) in bamboo stalks, which is much higher than lignin content (30.88%). A higher integrated cellulose as carbon sources in the initial stage of denitrification can promote the nitrate’s removal. Among the tested bamboo species, <i>Pn</i> and <i>Bg</i> exhibited the highest carbon release rates, at 1.57 ± 0.83 COD·mg·(g·d)⁻¹ and 1.05 ± 0.13 COD·mg·(g·d)⁻¹, respectively, which corresponded to effective nitrate removal performance. When the effluent NO₃⁻-N concentration was 15 mg·L⁻¹, their nitrate removal rates reached 71.53% ± 19.36 and 79.20 ± 21.49%, respectively. However, <i>Pn</i> showed higher nitrogen and phosphorus release (cumulative TN: 1.27 mg·g⁻¹; cumulative TP: 0.048 mg·g⁻¹), along with an elevated COD concentration (63.10 ± 77.86 mg·L⁻¹) in the effluent after denitrification. Therefore, <i>Bg</i> was identified as the most suitable carbon source for biological denitrification due to its balanced performance and lower pollutant release.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 8","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125806","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}

{"title":"Efficient Adsorption of Dye Pollutant by Anchoring Zr-MOF@GO Composite Matrix Microspheres: Performance and Mechanism Insights","authors":"Qianhui Ou,&nbsp;Yan Xiong,&nbsp;Li Chen,&nbsp;Deyong He,&nbsp;Chuxiang Zhou,&nbsp;Lan Wang","doi":"10.1007/s11270-025-08139-z","DOIUrl":"10.1007/s11270-025-08139-z","url":null,"abstract":"<div><p>The nanocomposite materials are highly promising candidates for adsorption applications in dyed wastewater due to their distinctive structural properties. In this work, the nanocomposite hybrids of UiO-66@GO were first synthesized by specifically anchoring Zr-based metal organic framework (MOF) of UiO-66 onto graphene oxide (GO) nanolayer through solvothermal method. Then the composite matrix microspheres (CMMs) of UiO-66@GO were subsequently prepared by embedding the obtained UiO-66@GO nanocomposite into sodium alginate (SA) microspheres through self-assembly cross-linking process. Finally, the prepared UiO-66@GO CMMs were applied for the adsorption of organic dye pollutant and showed efficient water purification performance. As a result, the UiO-66@GO CMMs exhibited selective cationic dye adsorption for Rhodamine B (RhB⁺). The experimental results revealed that the adsorption kinetics followed by the pseudo-second-order (PSD) model with rate constant k₂ = 0.95 × 10^–3 g mg⁻¹ min⁻¹, and the thermodynamics followed by the Langmuir model with adsorption capacity of 345.66 mg mg⁻¹. Notably, the UiO-66@GO CMMs demonstrated excellent adsorption removal of a significant removal efficiency of 98% towards 10 ppm Rh-B and a rapid adsorption response time of ~ 5 min. Meanwhile, the UiO-66@GO CMMs maintained long-term stability with adsorption efficiency &gt; 95% over 30 days and effective reuse with resorption efficiency &gt; 90% using DMF-H₂O as eluent. In this study, SA has served as a porous supporting matrix to immobilize UIO-66@GO nanoparticles, having mitigated issues of aggregation and leaching common to nanoscale adsorbents while improving reusability. The synergistic effect between UIO-66 and GO has further enhanced pollutant adsorption capacity, demonstrating significant potential for dye wastewater treatment applications.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 8","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125763","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}

{"title":"Particle dynamics of nanoplastics suspended in water with soil microparticles: insights from small angle neutron scattering (SANS) and ultra-SANS†","authors":"Anton Astner, Sai Venkatesh Pingali, Hugh O'Neill, Barbara Evans, Volker Urban, Kenneth Littrell and Douglas Hayes","doi":"10.1039/D4EN01199F","DOIUrl":"10.1039/D4EN01199F","url":null,"abstract":"<p >Small-angle neutron scattering (SANS) and ultra-SANS (USANS) were employed to understand the aggregation behavior and observe the size reduction for nanoplastics (NPs) formed from a biodegradable mulch film, and microparticles of vermiculite (V), an artificial soil, suspended in water in the presence of low convective shear (<em>ex situ</em> stirring) prior to measurements. Neutron contrast matching was employed to minimize the signal of V (by 100-fold) and thereby isolate the signal due to NPs in the neutron beam, as the contrast match point (CMP) for V (67 vol% deuteration of water) differed from that of NPs by more than 20%. The original NPs' size distribution was bimodal: &lt;200 nm and 500–1200 nm, referred to as small and large NPs, <em>i.e.</em>, SNPs and LNPs, respectively. In the absence of V, SNPs formed homoaggregates at higher concentrations that decreased with stirring time, while the size of LNPs remained unchanged. The presence of V at 2-fold lower concentration than NPs did not change the size of SNPs but reduced the size of LNPs by nearly 2-fold as stirring time increased. Because the size of SNPs and LNPs did not differ substantially between CMP and 100% D<small>₂</small>O solvents, it is evident that SNPs and LNPs are mainly composed of NPs and not V. The results suggest that LNPs are susceptible to size reduction through collisions with soil microparticles <em>via</em> convection, yielding SNPs near soil–water interfaces within vadose zones.</p>","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":" 7","pages":" 3539-3552"},"PeriodicalIF":5.8,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Synthesis, Characterisation and Photocatalytic Properties of ZnO/Carbonaceous Gelatin-Based Aerogel Material for Dyes Degradation in Water","authors":"Bouchra Nechchadi,&nbsp;Zineb Naribi,&nbsp;Anas Salhi,&nbsp;Mohammed El Krati,&nbsp;Soufiane Tahiri","doi":"10.1007/s11270-025-08123-7","DOIUrl":"10.1007/s11270-025-08123-7","url":null,"abstract":"<p>In this work, new ZnO/Carbonaceous gelatin-based aerogel (ZnO/CGA) materials with different weight ratios were prepared, and their photocatalytic properties were evaluated. The gelatin used was extracted from hide waste of tanneries. Compared to the pure ZnO, all the ZnO/CGA materials prepared exhibited higher degradation efficiency for methylene blue (MB), ZnO(50%)/CGA showed the optimal performance among them. Adding CGA to ZnO reduces the band gap to 3.28 eV, promotes the effective dispersion of ZnO particles, enhances electrons conduction, and minimizes the e⁻/h⁺ pair recombination. The impacts of solution pH, dye concentration, catalyst mass, UV irradiation time, and the presence of H₂O₂, organic solvents (ethanol and acetone), and salts were investigated. The highest degradation rate (99.25%) of MB dye at 20 mg.L^-1 was achieved by using 0.5 g.L^-1 of ZnO(50%)/CGA, operating at pH 6 for a duration of 3 hours. Moreover, the catalyst demonstrated reusability and stability across multiple cycles. The innovative addition of carbonaceous gelatin-based aerogel (CGA) to ZnO not only improves photocatalytic performance but also contributes to the sustainable use of tannery waste as a precursor material.</p>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 8","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117672","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}

{"title":"Integrating Simulation and Experimental Approaches for Nitrogen Removal: Feammox Enrichments and Bioaugmentation with High Fe(III) Demand","authors":"Carolina Rodríguez,&nbsp;Jaime Cisternas,&nbsp;Jennyfer Serrano,&nbsp;Eduardo Leiva","doi":"10.1007/s11270-025-08134-4","DOIUrl":"10.1007/s11270-025-08134-4","url":null,"abstract":"<div><p>Nitrogen is an essential element for life but its excessive release into the environment in the form of reactive nitrogen causes severe damage, including acidification and eutrophication. One of the main sources of nitrogen pollution is the use of fertilizers in agricultural soils. Feammox is a recently described pathway that couples ammonium (NH₄⁺) oxidation with iron (Fe) reduction. In this study, the enrichment and bioaugmentation of anaerobic sludge under conditions that promote Feammox activity were investigated. The first enrichment stage (E1) achieved 28% of ammonium removal after 28 days of incubation, with a production of 30 mg/L of Fe²⁺. E1 was then used as inoculum for two enrichments at 35 °C with different carbon sources: sodium acetate (E2) and sodium bicarbonate (E3). Neither E2 nor E3 showed significant NH₄⁺ removal, but E2 was highly effective in iron reduction, reaching Fe²⁺ concentrations of 110 mg/L. Additionally, an increase in nitrate (NO₃⁻) concentration was observed, which may indicate the occurrence of this pathway in the Feammox process. The Monod kinetic model, analyzed using AQUASIM software, showed a good fit to the experimental data for NH₄⁺, NO₃⁻, and Fe²⁺. Sequencing analysis revealed the presence of phyla associated with Feammox activity. Although there was only a slight difference in NH₄⁺ removal between the bioaugmented and non-augmented control sludge, the bioaugmented sludge was statistically superior in nitrate production and iron reduction. This study provides valuable insights into the enrichment and bioaugmentation of the Feammox process potential large-scale wastewater treatment applications.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 8","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117668","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}

{"title":"Impact of Alternating Reactor Functions on Aerobic Granular Sludge: Treatment Efficiency of Brewery Wastewater and Microbial Community","authors":"Shuo Yang,&nbsp;Dongxu Lu,&nbsp;Shaogen Liu,&nbsp;Yunkun Wang,&nbsp;Hongkui He,&nbsp;Jintong Ma,&nbsp;Liming Qin","doi":"10.1007/s11270-025-08148-y","DOIUrl":"10.1007/s11270-025-08148-y","url":null,"abstract":"<div><p>Brewery wastewater typically contains abundant refractory organic substances, that pose challenges, such as poor stability and low pollutant removal efficiency, when treated with conventional aerobic granular sludge (AGS). Hydrolytic acidification (HA) is an effective pretreatment approach that enhances the biological properties of wastewater. However, prolonged HA may lead to the disintegration of the AGS, thereby affecting its treatment efficacy. To address this issue, we propose an operational mode with alternating reactor functions, integrating HA with an SBR and alternately switching the functions of HA and SBR to maintain the stability of AGS and improve wastewater treatment efficiency. The experimental findings revealed that after the acclimation stage, the removal efficiencies of chemical oxygen demand, total nitrogen, NH4⁺-N, and PO₄³⁺-P in the experimental group reached 84.95%, 77.05%, 98.96%, and 79.38%, respectively, which were notably superior to those in the control group, which were 76.7%, 70.6%, 97.73%, and 78.61%, respectively. The results of the microbial community analysis suggest that the alternating operational mode facilitates the enrichment of functional microbial communities associated with pollutant removal, further augmenting the pollutant removal capacity. Our results offer a novel perspective for the application of AGS in the treatment of brewery wastewater and demonstrate that the alternating reactor function mode can effectively enhance treatment efficiency. Future research could further optimize the operating conditions and explore the application potential of the alternating operation of HA and SBR in the treatment of diverse types of wastewater.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 8","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117619","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}