Environmental Technology最新文献_第3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

Study on the effect of active substances in molasses on the chemical reduction of Cr(VI). 糖蜜中活性物质对Cr（VI）化学还原作用的研究。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-03-31 DOI: 10.1080/09593330.2025.2485362

Xinru Yang, Xiaoyu Li, Lining Hou, Ruxue Liu, Yongsheng Zhao

{"title":"Study on the effect of active substances in molasses on the chemical reduction of Cr(VI).","authors":"Xinru Yang, Xiaoyu Li, Lining Hou, Ruxue Liu, Yongsheng Zhao","doi":"10.1080/09593330.2025.2485362","DOIUrl":"10.1080/09593330.2025.2485362","url":null,"abstract":"Industrial molasses has garnered significant attention in the fields of food, fermentation and environmental remediation due to its abundant nutrients and antioxidant substances. Cr (VI) can be rapidly reduced by molasses in an acidic environment. In this study, the reducing activity of molasses was systematically analyzed. At pH = 2, the reduction of Cr(VI) by molasses followed a second-order kinetic model. As the molasses concentration increased from 5 g/L to 10 g/L, the reaction rate constant rose from 0.43 to 5.21 mM-1 h-1, and 56 mg/L Cr(VI) was completely eliminated in both systems. The change in polyphenol content in molasses exhibited a consistent trend with the Cr(VI) concentration. Then multiple Cr(VI) spiking experiments demonstrated that molasses contains a variety of substances with different reactivity. The rate constant for the third spike with 10 g/L molasses was 0.18 mM-1 h-1, significantly lower than that of the initial molasses concentration of 5 g/L (0.43 mM-1 h-1) under similar polyphenol levels. Moreover, the amount of polyphenols consumed to reduce the same amount of Cr(VI) varied at different spiking stages. UV-Vis, FTIR and 2DCOS revealed that the phenolic hydroxyl groups were the primary active substances involved in the reduction reaction with Cr(VI), and the molar ratio of total polyphenols to Cr(VI) ranged between 0.1 and 0.2. This study provides valuable insights into the dosage of molasses and other parameters for the effective removal of Cr(VI) pollution.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4123-4134"},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143751826","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

Improving the stability and efficiency of anaerobic hybrid reactor in treating citric acid wastewater using syntrophic methanogenic consortia. 提高厌氧混合式反应器处理柠檬酸废水的稳定性和效率。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-04-02 DOI: 10.1080/09593330.2025.2483938

Nasrul Hudayah, Nimaradee Boonapatcharoen, Wantanasak Suksong, Varunee Kongduan, Duanganong Phalaphol, Janphen Ainthaklay, Naruemon Aekkawatchai, Morakot Tanticharoen, Benjaphon Suraraksa

{"title":"Improving the stability and efficiency of anaerobic hybrid reactor in treating citric acid wastewater using syntrophic methanogenic consortia.","authors":"Nasrul Hudayah, Nimaradee Boonapatcharoen, Wantanasak Suksong, Varunee Kongduan, Duanganong Phalaphol, Janphen Ainthaklay, Naruemon Aekkawatchai, Morakot Tanticharoen, Benjaphon Suraraksa","doi":"10.1080/09593330.2025.2483938","DOIUrl":"10.1080/09593330.2025.2483938","url":null,"abstract":"Due to the high concentrations of chemical oxygen demand (COD) and total volatile acids (TVA) in the range of 18,000-20,000 mg/L and 4,900-5,600 mg/L, respectively, the treatment of citric acid production wastewater is a challenge. An anaerobic hybrid reactor (AHR) was used to treat this wastewater. The AHR operated at the maximum organic loading rate (OLR) of 7.6 kg COD/m3/d and a hydraulic retention time (HRT) of 2.5 days without any inhibition. The COD removal efficiency, methane yield, and methane content were 90%, 0.25 Nm3 CH4/kg COD removed, and 65%, respectively. Moreover, the activities of acetoclastic and hydrogenotrophic methanogens were approximately 108% and 63% higher than those of the initial inoculum, respectively. After increasing OLR to 8.3 kg COD/m3/d, TVA was accumulated at 5,200 mg/L, leading to failure. The main organic acids were acetic acid (AA) and propionic acid (PA) with concentrations of 2,800 and 1,300 mg/L, respectively. Syntrophic methanogenic consortia (SMC) were augmented into the AHR to recover the system. After 4 days of bioaugmentation, the TVA concentration decreased to less than 500 mg/L. Bioaugmentation also increased the ratio of the methanogens and acetogens to total microorganisms at the end of the recovery period to 32% and 23%, respectively. The AHR can be recovered to operate at OLR of 7.6 kg COD/m3/d within 18 days with good performance and microbial balance.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4022-4034"},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143771660","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

Preparation of nanofiber membrane based on recycled keratin from chicken eggshell and its preliminary application in membrane distillation. 回收鸡蛋壳角蛋白制备纳米纤维膜及其在膜蒸馏中的初步应用。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-04-05 DOI: 10.1080/09593330.2025.2485355

Qun Wang, Buthelezi Menzi Sydney, Yanyan Guo, Ying Liu, Yangguang Ren, Yuzhao Chen, Yuan Xu, Jun Gao, Zhaofeng Liu

{"title":"Preparation of nanofiber membrane based on recycled keratin from chicken eggshell and its preliminary application in membrane distillation.","authors":"Qun Wang, Buthelezi Menzi Sydney, Yanyan Guo, Ying Liu, Yangguang Ren, Yuzhao Chen, Yuan Xu, Jun Gao, Zhaofeng Liu","doi":"10.1080/09593330.2025.2485355","DOIUrl":"10.1080/09593330.2025.2485355","url":null,"abstract":"The inner eggshell membrane (ESM) sanctions the unfettered conveyance of air across the membrane, ensuring the air provision for embryonic development. As such, the electrostatic spinning technique was availed to fabricate large-scale and flat-sheet 'artificial' eggshell membranes by extracting keratin from waste egg membranes. Keratin within eggshell membranes was initially extracted via the chemical reduction method. Subsequently, diverse electrospinning conditions encompassing the type and concentration of additives as well as the electrospinning voltage were utilised to explore their impact on membrane morphology, wetting, and mechanical attributes. Experimental outcomes demonstrated that the ESM-based nanofiber membrane with salubrious morphology, anti-wetting, and mechanical properties could be procured by adding 12 wt% PVA into the keratin solution at 10.5 kV. Eventually, DCMD experiments for the ESM-based nanofiber membrane evinced that a stable water flux (10 LMH) and salt rejection rate could be discerned throughout the 150-min operational tenure, yet its efficacy lags behind other reported membranes. In light of the lofty porosity (>70%) and meager thermal conductivity of ESM (0.04 W/m·K), ESM nanofiber was coalesced with commercial PTFE membrane to fashion a dual-layer porous composite MD membrane utilised in VMD. Experimental findings divulged that the ESM-PTFE hybrid membrane possesses a relatively elevated water flux (30.21 LMH), being commensurate with the reported PTFE-based MD membranes. Accordingly, this research can provide the theoretical underpinning for the fabrication of ESM-based nanofiber membranes by means of the electrostatic spinning approach, and is conducive to the highly efficient and highly valuable exploitation of waste eggshells.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4076-4086"},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143788302","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

Study on the growth of a native microalgae-bacteria mixed culture from the Peruvian Andes exposed to different tannery effluent dilutions and photoperiod. 秘鲁安第斯山脉原生微藻-细菌混合培养物在不同制革厂废水稀释和光周期下的生长研究。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-08-01 Epub Date: 2025-04-02 DOI: 10.1080/09593330.2025.2485354

Lalo Monzón Martínez, Rosa Atayupanqui Dueñas, Armando González Sánchez, Javier Montalvo Andia

{"title":"Study on the growth of a native microalgae-bacteria mixed culture from the Peruvian Andes exposed to different tannery effluent dilutions and photoperiod.","authors":"Lalo Monzón Martínez, Rosa Atayupanqui Dueñas, Armando González Sánchez, Javier Montalvo Andia","doi":"10.1080/09593330.2025.2485354","DOIUrl":"10.1080/09593330.2025.2485354","url":null,"abstract":"This study evaluated the suitability of wastewater treatment from tanneries located in the city of Arequipa, Peru. The growth of the microalgae-bacteria consortium enriched from wastewater ponds located in high altitude (2300 m above sea level) and areas with high ultraviolet radiation, was characterized under different wastewater dilutions, nutrient-corrected wastewater and various light periods in a laboratory-scale air-lift system over a 9-day cultivation period . The results indicate a higher COD removal at low dilutions (50%) in both 16L:8D and 24L:0D photoperiods, achieving 43.63% and 42.93%, respectively, however, a higher daily consumption rate was observed in treatments with 75% and 100% tannery wastewater, with the highest COD consumption recorded in the 100% treatment under the 16L:8D photoperiod, with at 85.50 mg L⁻¹ d⁻¹. Regarding nitrogen removal and consumption, significant results were obtained in the 100% treatment with 16L:8D photoperiod with values of 55.46% and 3.81 mg L-1 d-1 respectively, while for phosphorus all treatments had high removals (>95%). On the other hand, the highest productivity occurred in the 100% treatment for both the 16L:8D and 24;0 photoperiod with a value of 52.85 and 64.28 mg L-1 d -1 respectively. Finally, by phosphorous supplementation in the medium, the productivity in all treatments improved, obtaining the maximum biomass productivity in the 75% 24L:0D treatment with 95,714 mg L-1 d-1. The maximum accumulation of lipids was 18.7% of the effluent with 100%, 16L:8D photoperiod. These results confirm that microalgae technology is an ecofriendly alternative to treat tannery beam house wastewaters.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4060-4075"},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143771692","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}

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