Environmental Technology最新文献_第2页

Flow condition mitigates the inhibition of high concentration Cu²⁺ on the sulfate reduction performance of microbial electrolysis cell. 流动条件减轻了高浓度Cu2+对微生物电解池硫酸盐还原性能的抑制作用。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-19 DOI: 10.1080/09593330.2025.2478183

Yunfeng Zhang, Yubing Pan, Cheng Zhao, Minghui Lv, Qing Jiang, Feng Wang, Yanan Li, Shuai Gao, Ke Shi

{"title":"Flow condition mitigates the inhibition of high concentration Cu2+ on the sulfate reduction performance of microbial electrolysis cell.","authors":"Yunfeng Zhang, Yubing Pan, Cheng Zhao, Minghui Lv, Qing Jiang, Feng Wang, Yanan Li, Shuai Gao, Ke Shi","doi":"10.1080/09593330.2025.2478183","DOIUrl":"10.1080/09593330.2025.2478183","url":null,"abstract":"Microbial electrolysis cells (MECs) are promising for treating acidic mine drainage (AMD) containing high concentrations of sulfates and heavy metals. However, the performance of MEC cathodic biofilms is influenced not only by high heavy metals concentrations but also by hydrodynamic mixing conditions. Yet, there is a lack of precise assessment on the impact of hydrodynamic mixing conditions on MEC treating sulfate-laden wastewater under high heavy metal stress, and the defense mechanisms of MECs remain unclear. This study investigated the effects of different hydrodynamic conditions (EG, flow condition; CG, stationary condition) on the performance of MECs treating sulfate wastewater under high heavy metal stress, delving into microbial activity, community composition, electrochemical performance, and microbial defense capabilities against heavy metals. The results indicated that under heavy metal stress, microbial cells underwent severe deformation and death, with the assimilatory sulfate reduction pathway severely impaired, leading to a decline in MEC performance, and the reduction rate of CG group was finally reduced to 14.47%. In contrast, under flow conditions, the EG group exhibited increased extracellular polymeric substances (EPS) composition, enhanced biofilm community diversity, and elevated levels of copper resistance genes, significantly mitigating the inhibitory effects of Cu2+ on microorganisms, ultimately maintaining a performance of 47.18%. Ultimately, Cu2+ in the system was removed through bioprecipitation and biosorption, forming CuS and Cu(OH)2. This work provides critical insights for scaling up MEC technology to address co-contamination challenges in acid mine drainage remediation, particularly for environments with hydrodynamic mixing conditions and elevated heavy metal concentrations.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3847-3858"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143663105","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

Endophytic bacteria-assisted cadmium removal in sunflower stalks: towards safe biomass recycling. 内生细菌辅助向日葵茎中镉的去除：迈向安全的生物质回收。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-19 DOI: 10.1080/09593330.2025.2478180

Liwei Chen, Qiuguo Zhang, Wei Li, Yue Xie, Tingli Wang, Jian Liu

{"title":"Endophytic bacteria-assisted cadmium removal in sunflower stalks: towards safe biomass recycling.","authors":"Liwei Chen, Qiuguo Zhang, Wei Li, Yue Xie, Tingli Wang, Jian Liu","doi":"10.1080/09593330.2025.2478180","DOIUrl":"10.1080/09593330.2025.2478180","url":null,"abstract":"Cadmium (Cd) contamination in agricultural soils is one of the major threats to food safety and environmental health. In a phytoremediation program for the extraction of Cd by plants, one critical challenge is the management of harvested biomass because of its highly contaminant content. This study investigates the use of endophytic bacteria to assist in Cd removal from sunflower stalks, aiming to make the biomass safer for reuse as fertilizer. Sixteen endophyte strains were isolated from sunflower plants grown in Cd-contaminated soils, out of which two strains, J14 and J15, namely Enterobacter roggenkampii and Kosakonia cowanii, respectively, showed the most potential for Cd removal. Under the optimized conditions, 42.03% and 37.99% Cd removal efficiency could be achieved by J14 and J15, respectively. More than 50% of some specific forms of Cd (F2, F4, F5) in sunflower stalks can be reduced during extraction. Importantly, the treatment with endophytes lowered Cd in contaminated biomass without significant reductions in the major plant nutrients (nitrogen, phosphorus, and potassium), thus rendering it safe for its reuse as fertilizer. This study offers a novel perspective on biomass contamination in phytoremediation, suggesting a new environmentally friendly approach for the recycling of polluted plant material towards safer and more economic phytoremediation practices.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3822-3835"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143663103","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

Experimental and kinetic investigation of textile-based refuse derived fuel (t-RDF) pyrolysis: analysing the valorisation of textile waste. 纺织垃圾衍生燃料（t-RDF）热解的实验和动力学研究：分析纺织废物的增值。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-27 DOI: 10.1080/09593330.2025.2482964

Mohd Zeeshan, Rohan R Pande, Purnanand V Bhale

{"title":"Experimental and kinetic investigation of textile-based refuse derived fuel (t-RDF) pyrolysis: analysing the valorisation of textile waste.","authors":"Mohd Zeeshan, Rohan R Pande, Purnanand V Bhale","doi":"10.1080/09593330.2025.2482964","DOIUrl":"10.1080/09593330.2025.2482964","url":null,"abstract":"A majority of global textile waste is neither recycled nor repurposed; instead, it finds its way into landfills or incinerators. Polymer-based textiles, a significant component of this waste, may persist in landfills without degrading for up to two centuries. This study investigates valorisation of specific blends of textile-based Refuse Derived Fuel (t-RDF) in a novel simultaneous experimental and kinetic analysis to determine pyrolysis product characteristics with process kinetics and thermal parameters. A TGA is initially used to examine the degradation characteristics of t-RDF at three heating rates: 5, 10, and 20 °C.min-1. The kinetics of the non-isothermal pyrolysis of t-RDF are investigated to obtain the activation energy changes that represent the process kinetics for forecasting pyrolysis using the reaction scheme. The average activation energy of the t-RDF, deduced using the Starink model, is found to be 99.22 kJ.mol-1. An in-house designed reactor is used to perform pyrolysis at different temperatures to analyse the effect of compositional variations in the t-RDF. The physicochemical properties of the pyrolysis products are characterised using FTIR spectroscopy, proximate and ultimate analysis, and surface area (BET) analysis. Synthesised t-RDF composition exhibits a heating value of 22.40 ± 3.33 MJ.kg-1, and pyrolysis gas has a heating value of 20.5 ± 1 MJ.m-3, whereas chars are analysed to provide a maximum BET surface area of 32.71 m2.g-1. The study provides insights into sustainable methods to valorise textile waste for valuable products while reducing landfills and promoting renewable sources.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3930-3943"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143729394","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

Nitrate removal from industrial wastewater using six newly isolated strains of aerobic heterotrophic denitrifiers in an attached growth. 六株新分离的异养好氧反硝化菌在附着生长中去除工业废水中的硝酸盐。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2023-12-07 DOI: 10.1080/09593330.2023.2283781

Atefeh Saedi, Nafiseh Sadat Naghavi, Abbas Farazmand, Davood Zare, Maryam Mohammadi-Sichani

{"title":"Nitrate removal from industrial wastewater using six newly isolated strains of aerobic heterotrophic denitrifiers in an attached growth.","authors":"Atefeh Saedi, Nafiseh Sadat Naghavi, Abbas Farazmand, Davood Zare, Maryam Mohammadi-Sichani","doi":"10.1080/09593330.2023.2283781","DOIUrl":"10.1080/09593330.2023.2283781","url":null,"abstract":"Background: The objective of this study was to isolate specific heterotrophic aerobic denitrifying bacteria from a wastewater treatment plant and employ them in an attached growth system for wastewater denitrification.Methods: To isolate and screen aerobic denitrifiers, Denitrifying Medium (DM) and Screen Medium (GN) were utilized. The Polymerase Chain Reaction (PCR) technique and 16S rDNA sequencing were used to identify the isolates. The formation of biofilms by selected isolates on ceramic media was examined using a Scanning Electron Microscope (SEM). This study also investigated various variables for nitrate removal, including temperature, Carbon/Nitrogen ratio (C/N), and the carbon source. A series of experiments were conducted to gauge nitrate removal under optimal variable values.Results: Six purified strains exhibited the highest denitrification efficiency in less than 30 h. Pseudomonas species were chosen for additional experiments. Denitrification efficiencies ranged from a low of 71.4% (at a temperature of 30 °C, C/N ratio of 17, and citrate as the carbon source) to a high of 98.9% (at a temperature of 33 °C, C/N ratio of 8, and citrate as the carbon source). The average denitrification efficiency was 84.02%. Optimal nitrate removal occurred at temperatures around 30-31 °C and C/N ratios of approximately 5.8-6.5.Conclusion: This study demonstrates that aerobic denitrifying bacteria can effectively remove nitrate from aqueous solutions.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3739-3749"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"107590632","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

Evaluation of biofilm carrier colonisation in a deammonification moving-bed biofilm reactor. 脱氨移动床生物膜反应器中生物膜载体定植的评价。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-18 DOI: 10.1080/09593330.2025.2475522

Mor Shental-Isaacs, Guy Horev, Carlos G Dosoretz

{"title":"Evaluation of biofilm carrier colonisation in a deammonification moving-bed biofilm reactor.","authors":"Mor Shental-Isaacs, Guy Horev, Carlos G Dosoretz","doi":"10.1080/09593330.2025.2475522","DOIUrl":"10.1080/09593330.2025.2475522","url":null,"abstract":"This study focused on the evaluation and characterisation of carrier colonisation of a deammonification moving-bed biofilm reactor (dMBBR) at a low carrier-inoculation ratio (≤5%v/v), applying multiple methodologies. The dMBBR (5 L working volume) was filled with Aqwise carriers (50%v/v filling ratio) and fed with synthetic feedstock. Carrier colonisation was differentially tracked using grey colour for new carriers and white colour for pre-colonised seed carriers. The reactor operated for 190 days at a nitrogen loading of 125-140 gN/m3/d. Multivariant heatmap analysis of the process parameters indicated stable deammonification performance from day 85 onwards albeit some occasional malfunctions occurred, with NH4+ and total nitrogen removal rates amounting to 85% and 61%, respectively. Biofilm development on new carriers, evaluated by bulk density measurements via pycnometry, proved to be a reliable, simple, and non-destructive methodology. Anammox of genus Candidatus Brocadia and ammonia oxidising bacteria of genus Nitrosomonas were well established on the new carriers, in line with theoretical and empirical specific activity tests. This multi-parameter evaluation provides a broad insight into deammonification biomass development on the carriers and may assist in shortening the start-up period of dMBBRs.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3777-3790"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143656663","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

Resource recovery from MSW incineration residues through the 'Ash-by-Ash Treatment Method' (AATM): optimization of water and bottom ash contents. 通过“逐灰处理法”（AATM）从城市生活垃圾焚烧残留物中回收资源：优化水和底灰含量。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-19 DOI: 10.1080/09593330.2025.2478179

Mitali Nag, Dania Labira, Takayuki Shimaoka

{"title":"Resource recovery from MSW incineration residues through the 'Ash-by-Ash Treatment Method' (AATM): optimization of water and bottom ash contents.","authors":"Mitali Nag, Dania Labira, Takayuki Shimaoka","doi":"10.1080/09593330.2025.2478179","DOIUrl":"10.1080/09593330.2025.2478179","url":null,"abstract":"Fine-fraction of Municipal Solid Waste (MSW) incineration bottom ash (IBA) contains amorphous silica, known as pozzolan is one of the potential heavy metal stabilizers in MSW incineration fly ash (IFA) by forming the cementitious compounds of calcium silicate hydrates (C - S - H) and calcium aluminate hydrates (C-A-H). The technique can be called the 'Ash-by-Ash Treatment Method' (AATM). To optimize the AATM, effects of water (L/S ratios) and IBA amounts (IFA/IBA ratios) were examined in this study. IFA and IBA were provided by two distinct incineration plants; IBA was utilized at fractions d < 250μm because of its high reactive amorphous pozzolan. The testing involved mixing ashes at different L/S (ml/g) and IFA/IBA ratios, leaving the air dry at ambient temperature, afterward settling for periods of 4, 8, 16, 30, and 60 days. The results confirmed that various L/S (ml/g) ratios have no discernible influence on the immobilization of heavy metals. At 60 days, even a lowered moisture content could maintain more than 99% of Pb immobilization efficiency and 100% of Cr and Cu immobilization efficiency. In another experiment, using up to 30% of IBA with L/S (ml/g) ratios of 0.6 also demonstrated >99% of Pb immobilization. No discernible change has been observed between the different L/S (ml/g) and IFA/IBA. Consequently, increasing IBA and decreasing water could assist in optimizing AATM. The immobilization process involves carbonation and pozzolanic reactions, which are substantiated by the leaching solution's pH decrease, the formation of calcite, the appearance of multiple new minerals, and the cementitious products C-S-H gels.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3804-3821"},"PeriodicalIF":2.2,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143663112","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

Hydrochar-enhanced hydrogen production from cassava industrial waste residue using Enterobacter Aerogenes MTCC 2822. 利用产气肠杆菌MTCC 2822从木薯工业废渣中加氢制氢研究。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-27 DOI: 10.1080/09593330.2025.2480319

Subash Kannan Ravichandran, Blessy Silvaster, Selvakumar Rajendran, Jonathan W C Wong, Brindha Ganesan, Davidraj Johnravindar

{"title":"Hydrochar-enhanced hydrogen production from cassava industrial waste residue using Enterobacter Aerogenes MTCC 2822.","authors":"Subash Kannan Ravichandran, Blessy Silvaster, Selvakumar Rajendran, Jonathan W C Wong, Brindha Ganesan, Davidraj Johnravindar","doi":"10.1080/09593330.2025.2480319","DOIUrl":"10.1080/09593330.2025.2480319","url":null,"abstract":"Hydrogen gas (H2) is a promising renewable resource, and its production from organic waste has gained significant attention as an alternative to traditional energy sources. This study investigates hydrogen production from cassava industry waste residue (CWR) by incorporating hydrochar-supported nanoparticles (HSNPs) containing nickel (Ni) and iron (Fe) nanoparticles (NPs). Ni and Fe2O3 NPs were synthesised through the hydrothermal carbonisation (HTC) method and analyzed for their impact on biohydrogen production. The results indicated a maximum volumetric hydrogen production rate of 1013 mL/gCWR, with a substrate degradation efficiency of 80%. Addition of 0.5 mol Ni-Fe2O3 hydrochar was found to be optimal which enhanced the overall cumulative hydrogen production by 41.015%, and higher COD removal efficiency by 90% was obtained as compared to hydrochar without additives. The toxicity of NPs was assessed through bacterial viability, which examined various loading concentrations of NPs in a glucose medium. The findings revealed that supplementing hydrochar-supported NiO and Fe2O3 NPs within an optimal range for CWR can significantly improve hydrogen productivity. Additionally, HSNPs can enhance hydrogenase activity and electron transfer efficiency, which are beneficial to bio-H2 evolution. However, excessive HSNP addition may be toxic to microbes and further inhibit H2 production. This study presents an effective method for promoting the evolution rate of H2 gas.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"3887-3903"},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143729415","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

Catalytic steam gasification of food waste with food waste ash supported Nickel catalyst: conventional vs in-situ two-stage approach. 食物垃圾灰负载镍催化剂催化蒸汽气化：常规与原位两阶段方法。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-07-25 DOI: 10.1080/09593330.2025.2536754

Aayush Raizada, Sanjeev Yadav

{"title":"Catalytic steam gasification of food waste with food waste ash supported Nickel catalyst: conventional vs in-situ two-stage approach.","authors":"Aayush Raizada, Sanjeev Yadav","doi":"10.1080/09593330.2025.2536754","DOIUrl":"https://doi.org/10.1080/09593330.2025.2536754","url":null,"abstract":"In this study, first, a novel Ni catalyst was developed where 5% nickel was loaded on food waste ash and thereafter, it was used in steam gasification of food waste via two different processes: conventional overlapping process (COP) with simultaneous pyrolysis and gasification, and in-situ two-stage process (ITP) with consecutive pyrolysis and gasification. The temperature for the pyrolysis and gasification stage in ITP was maintained at around 850 °C. Both the processes (COP and ITP) were also conducted at the same temperature of 850°C with a steam flow rate of 0.73 mL/min for 100 g of the food waste sample. The processes were conducted in a downdraft gasifier with variations in catalyst content. The catalyst content in the feed-catalyst mixture was varied from 0 to 50 g, and results indicated that the use of a 50 g catalyst during COP increased the syngas yield quite significantly (∼70%). However, the results showed that the Ni catalyst did not have much effect on syngas yield from ITP, though it increased the hydrogen fraction in syngas (∼80%). The highest hydrogen fraction in syngas from COP and ITP was found to be 71.74% and 66.53% respectively. Consequently, the highest hydrogen yield of 1.3 m3/kg was obtained from COP for 50 g of catalyst in a feed-catalyst mixture. Furthermore, performance parameters such as high heating value (HHV), carbon conversion efficiency (CCE), and cold gas efficiency (CGE) were determined for performance analysis of the Ni-based catalyst in conventional and in-situ steam gasification.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-12"},"PeriodicalIF":2.2,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144706869","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

Optimization of the bio-H₂ and lactate production from vinasse and molasses: an experimental approach for the bioenergy development in Brazil. 从酒糟和糖蜜中优化生物h2和乳酸的生产：巴西生物能源发展的实验方法。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-07-25 DOI: 10.1080/09593330.2025.2532194

Alexandre Rodrigues Ribeiro, José Arnaldo de Freitas Junior, Kauanna Uyara Devens, Isabel Kimiko Sakamoto, Maria Bernadete Amâncio Varesche, Edson Luiz Silva

{"title":"Optimization of the bio-H2 and lactate production from vinasse and molasses: an experimental approach for the bioenergy development in Brazil.","authors":"Alexandre Rodrigues Ribeiro, José Arnaldo de Freitas Junior, Kauanna Uyara Devens, Isabel Kimiko Sakamoto, Maria Bernadete Amâncio Varesche, Edson Luiz Silva","doi":"10.1080/09593330.2025.2532194","DOIUrl":"https://doi.org/10.1080/09593330.2025.2532194","url":null,"abstract":"This study investigates the efficiency of hydrogen (H2) and lactate (HLa) generation in the co-fermentation of sugarcane vinasse and molasses, aiming to optimize operational strategies through central composite design (CCD) and response surface methodology (RSM). The tests were conducted in 1 L Duran® flasks, with a working volume of 500 mL, under thermophilic conditions (55°C) and pH 7.0. Nine conditions were evaluated by varying co-substrate concentrations (3.9 - 11.1 g COD.L-1) and vinasse proportions (7.6 - 92.4%), identifying the most favourable conditions for H2 and HLa production. High H2 potential (up to 1275 mL.L-1) was observed with 7.5 g COD.L-1 of co-substrates and 7.6% vinasse, mainly attributed to Clostridium. Adding molasses maximized H2 generation, while higher vinasse proportions favoured lactobacilli, increasing HLa concentration and reducing H2. Replicability was ensured, validating tests with high H2 generation and 75% similar results. The tests showed discrepancies in bacterial genus prevalence: the condition with 11.1 g COD.L-1 of co-substrates and 50% vinasse favoured HLa producers (Sporolactobacillus, Lactobacillus, Bacillus), while the condition with only 7.5 g COD.L-1 of co-substrates and 7.6% vinasse favoured H2 producers (Clostridium, Thermoanaerobacterium, Pseudomonas). These findings guide future feeding strategies to optimize bioproduct yield, favouring the generation of target bioproducts and ensuring a holistic view of vinasse and molasses utilization for fermentative H2 biogas production.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-18"},"PeriodicalIF":2.2,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714984","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

Synergistic removal of ammonia nitrogen and thallium using sodium sulphide precipitation and autotrophic nitrifying granular sludge biosorption. 硫化钠沉淀与自养硝化颗粒污泥生物吸附协同去除氨氮和铊。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-07-22 DOI: 10.1080/09593330.2025.2533441

Lingcong Zeng, Jinqiang Guan, Shengping Wen, Shijia Gui, Liujia Wang, Shaoqin Li, Xianxiong Cheng, Yuanyuan Cheng, Bei Long

{"title":"Synergistic removal of ammonia nitrogen and thallium using sodium sulphide precipitation and autotrophic nitrifying granular sludge biosorption.","authors":"Lingcong Zeng, Jinqiang Guan, Shengping Wen, Shijia Gui, Liujia Wang, Shaoqin Li, Xianxiong Cheng, Yuanyuan Cheng, Bei Long","doi":"10.1080/09593330.2025.2533441","DOIUrl":"https://doi.org/10.1080/09593330.2025.2533441","url":null,"abstract":"This study developed a novel hybrid process integrating sodium sulphide (Na2S) precipitation with autotrophic nitrifying granular sludge (ANGS) biosorption for the efficient removal of thallium (Tl) and ammonium nitrogen (NH4+-N) from ionic rare earth mining wastewater in South Jiangxi. Single-factor experiments and orthogonal optimization determined the optimal Na2S precipitation conditions (pH 10, 0.3 mL Na2S dosage, 9 min reaction time), achieving removal efficiencies of 94.47 ± 0.18% for Tl and 55.71 ± 1.42% for NH4+-N. Subsequent ANGS biosorption further improved total removal efficiencies to 99.59 ± 0.36% for Tl and 74.15 ± 1.43% for NH4+-N, with final effluent concentrations of 0.62 ± 0.54 μg/L Tl and 12.28 ± 0.68 mg/L NH4+-N, complying with discharge standards (5 μg/L Tl, 15 mg/L NH4+-N). X-ray photoelectron spectroscopy (XPS) analysis indicated that Tl removal was primarily mediated by thallium sulphide (Tl2S) precipitation, while ANGS contributed to immobilization via functional group complexation and intracellular adsorption. This synergistic chemical-biological approach demonstrates high efficiency, cost-effectiveness, and operational simplicity, offering a promising solution for tailwater treatment in ionic rare earth mining.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-9"},"PeriodicalIF":2.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144689682","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