Environmental Technology最新文献_第4页

A low-cost and sustainable approach to microbial pectinase production from fruit processing wastes: from peel to profit. 从水果加工废料中生产微生物果胶酶的低成本和可持续方法：从果皮到利润。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-15 DOI: 10.1080/09593330.2025.2555498

Sagia Sajish, Govind Singh Tomar, Surender Singh, Rajeev Kaushik

{"title":"A low-cost and sustainable approach to microbial pectinase production from fruit processing wastes: from peel to profit.","authors":"Sagia Sajish, Govind Singh Tomar, Surender Singh, Rajeev Kaushik","doi":"10.1080/09593330.2025.2555498","DOIUrl":"https://doi.org/10.1080/09593330.2025.2555498","url":null,"abstract":"Microbial pectinases are one among the crucial industrial enzymes widely used in fruit juice clarification, textile processing, dietary fibre extraction and waste management. However, high cost of commercial raw materials poses a significant challenge in the microbial production of pectinases. The utilization of agro-food residues as low-cost substrates offers a cost-effective and greener approach to enzyme production. In this study, pectinolytic bacterial and fungal isolates were obtained from rotten fruits and vegetables; and screened for polygalacturonase and pectin lyase production. After characterizing the isolates for their ability to utilize various sugars, several agro-residues were evaluated as carbon and nitrogen substrates for pectinase production. Fusarium annulatum MIB02 exhibited significant polygalacturonase (155.23 IU mL-1) with sweet lime peel powder and corn steep liquor as carbon and nitrogen substrates. Similarly, Bacillus subtilis MIPe01 demonstrated pectin lyase activity of 9.12 IU mL-1 with orange peel powder and soybean meal. Although enzyme yield was lower from agro-residues compared to commercial pectin, potential trade-off between reduced production costs and production efficiency enhances the economic feasibility of pectinase production. The findings from our study support the valorization of agro-food residues as a greener and cheaper approach for pectinase production contributing towards a circular bio-economy.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-18"},"PeriodicalIF":2.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145069246","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

Novel approach for untreated household PET waste depolymerization: recombinant extracellular thermostable hydrolases. 未经处理的家用PET废物解聚的新方法：重组细胞外热稳定水解酶。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-14 DOI: 10.1080/09593330.2025.2553868

Julieta Magalí Frescura, Tomás Frosio, Julia Yamila Santillán, Natalia Lorena Rojas

{"title":"Novel approach for untreated household PET waste depolymerization: recombinant extracellular thermostable hydrolases.","authors":"Julieta Magalí Frescura, Tomás Frosio, Julia Yamila Santillán, Natalia Lorena Rojas","doi":"10.1080/09593330.2025.2553868","DOIUrl":"10.1080/09593330.2025.2553868","url":null,"abstract":"Plastics represent a global environmental challenge due to their widespread use and persistent accumulation. This study is focused on the enzymatic depolymerization of non-pretreated household PET waste using two plastic-degrading esterases, LCCICCG and IsPETaseW159H/F229Y, leveraging the advantages of the extracellular expression in a Pichia pastoris system. The simple recovery and improved stability enabled by this expression system are crucial foundations in the development of biocatalytic remediation processes. Expression in batch cultures resulted in esterase activity levels of 86.3 ± 3.7 IU/mg for LCCICCG and 16.4 ± 0.3 IU/mg for IsPETaseW159H/F229Y after 48 hours of induction, and these enzymes kept their catalytic activity after at least 30 days at 4 and 25 °C. LCCICCG successfully degraded non-pretreated PET (87.6 ± 10.7 gPET h-1 genzyme-1), while IsPETaseW159H/F229Y exhibited a tenfold increase in depolymerization efficiency over previous reports (1.71 ± 0.3 gPET h-1 genzyme-1). LCCICCG exhibited enhanced activity at high temperatures, associated with the glycosylations introduced during expression in P. pastoris, making it a promising candidate for industrial applications requiring high-temperature operations. It is outstanding the specific space-time yield achieved by LCCICCG (183.1 mMTAeq h-1 mgenzyme-1), which results higher than those previously reported. These results encourage reducing both time and costs associated with conditioning pretreatments for non-pretreated household plastic wastes or biocatalyst downstream processing. They also underscore the potential of exploring a promising pathway towards large-scale, environmentally sustainable PET waste management.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-14"},"PeriodicalIF":2.0,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145063273","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

A data-driven approach to predicting critical TSP episodes: insights from a mining-influenced area in Southeast Brazil. 预测关键TSP事件的数据驱动方法：来自巴西东南部采矿影响地区的见解。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-14 DOI: 10.1080/09593330.2025.2556349

Camilo Bastos Ribeiro, Leonardo Hoinaski, Robson Will, José Henrique Hess, Amanda Ribeiro, Rizzieri Pedruzzi, Edmilson Dias de Freitas, Taciana Toledo de Almeida Albuquerque

{"title":"A data-driven approach to predicting critical TSP episodes: insights from a mining-influenced area in Southeast Brazil.","authors":"Camilo Bastos Ribeiro, Leonardo Hoinaski, Robson Will, José Henrique Hess, Amanda Ribeiro, Rizzieri Pedruzzi, Edmilson Dias de Freitas, Taciana Toledo de Almeida Albuquerque","doi":"10.1080/09593330.2025.2556349","DOIUrl":"https://doi.org/10.1080/09593330.2025.2556349","url":null,"abstract":"Air pollution caused by Total Suspended Particles (TSP) poses significant environmental and health risks, particularly in regions with intensive soil-disturbing activities, such as mining areas. TSP concentrations are influenced by complex and nonlinear interactions between meteorological conditions and surface-related factors, presenting substantial challenges for controlling TSP emissions and their associated impacts. Few studies have developed data-driven approaches to identify and anticipate high-risk periods based on the dynamics of these drivers. This study aims to characterise the temporal dynamics and key drivers of TSP, and to delineate thresholds of these drivers associated with critical TSP episodes in a mining-intensive region of southeastern Brazil. Using observational data from 2023 and applying Kernel Ridge Regression (KRR), we explored hourly, daily, and monthly TSP patterns, assessed meteorological and surface-related drivers, and delineated thresholds of key drivers associated with extreme pollution episodes. Results show that TSP levels peak during dry months (July-September), on weekdays, and during morning and evening rush hours. Strong associations were observed between TSP and PM₁₀, with dry and low-humidity conditions favouring the increase of these pollutants. The KRR model explained 71% of the TSP variability, highlighting soil moisture, wind gusts, and consecutive dry periods as key predictors. Thresholds such as soil moisture <0.15 m3/m3, wind gusts >16 m/s, and consecutive dry periods >470 hours were critical for extreme events. This study provides a framework for anticipating critical TSP episodes based on key meteorological and surface-related drivers, enabling informed mitigation strategies in mining-impacted regions.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-12"},"PeriodicalIF":2.0,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145063840","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

Optimized batch fermentation conditions for enhanced specific hydrogen yield of Bacillus safensis TH2. 优化分批发酵条件提高萨菲芽孢杆菌TH2的比产氢率。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-14 DOI: 10.1080/09593330.2025.2544951

Tawaf Ali Shah, Chuancheng Dongye, Andong Zhang, Hafiz Muhammad Saleem Akhtar, Atef Fathy Ahmed, Zhihe Li

{"title":"Optimized batch fermentation conditions for enhanced specific hydrogen yield of Bacillus safensis TH2.","authors":"Tawaf Ali Shah, Chuancheng Dongye, Andong Zhang, Hafiz Muhammad Saleem Akhtar, Atef Fathy Ahmed, Zhihe Li","doi":"10.1080/09593330.2025.2544951","DOIUrl":"https://doi.org/10.1080/09593330.2025.2544951","url":null,"abstract":"Biohydrogen (BioH2), a sustainable energy source derived from diverse carbon substrates, is limited by low yields and undefined optimal fermentation conditions. This study isolated Bacillus tequilensis TH1 and Bacillus safensis TH2 from anaerobic sludge of a full scale digester, both exhibiting robust amylase, protease, cellulase, and lipase activities. B. tequilensis TH1 achieved cumulative hydrogen yields of 188.5 mL-H/gVS from starch, 145.8 mL-H/gVS from glucose, and 121.3 mL-H/gVS from kitchen food waste. B. safensis TH2 outperformed TH1, yielding 272.7 mL-H/gVS from starch, 237.3 mL-H/gVS from glucose, and 276.8 mL-H/gVS from kitchen food waste. Optimized conditions for B. safensis TH2 (2% substrate, 1.5 OD600 inoculum, pH 5.5, 40°C) increased daily hydrogen yield to 35.7 mL/d and cumulative production to 373.98 mL-H/gVS from kitchen food waste, with a specific hydrogen production rate (SHPR) of 13.2 mL/g·d. This optimization improved cumulative hydrogen by 11.3% and SHPR by 18.1%, achieving a peak hydrogen yield of 1.32 mol H2/mol hexose. These strains' ability to convert diverse substrates into BioH2 highlights their potential for large-scale production, advancing sustainable energy solutions.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-11"},"PeriodicalIF":2.0,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145063435","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

Nitrogen removal efficiency and pathways of the simultaneous nitrification and denitrification process under ultra-low oxygen conditions. 超低氧条件下同时硝化反硝化过程的脱氮效率及途径研究。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-10 DOI: 10.1080/09593330.2025.2556497

Yu Xiang, Xiangtian Man, Han Zhang, Mengli Chen, Ruxin Yang

{"title":"Nitrogen removal efficiency and pathways of the simultaneous nitrification and denitrification process under ultra-low oxygen conditions.","authors":"Yu Xiang, Xiangtian Man, Han Zhang, Mengli Chen, Ruxin Yang","doi":"10.1080/09593330.2025.2556497","DOIUrl":"https://doi.org/10.1080/09593330.2025.2556497","url":null,"abstract":"To explore strategies for further reducing aeration energy consumption in the simultaneous nitrification and denitrification (SND) process, an SND reactor was constructed to treat low carbon-to-nitrogen (C/N) ratio domestic wastewater under ultra-low dissolved oxygen (DO) conditions (DO < 0.05 mg·L⁻1). The effects of hydraulic retention time (HRT) and C/N ratio on nitrogen removal performance were systematically evaluated, and batch experiments were conducted to determine nitrification and denitrification rates. Under influent condition of 50.0 mg·L⁻1 ammonia and a C/N ratio of 2.2, the reactor maintained stable ultra-low DO levels, achieved effluent ammonia concentrations below 5.0 mg·L⁻1, and attained optimal SND efficiencies exceeding 80.0%. Although a shortened HRT destabilised performance, increasing the C/N ratio successfully restored nitrogen removal stability. Nitrification and denitrification rates ranged from 4.20-30.89 mg·L⁻1·h⁻1 and 1.57-21.92 mg·L⁻1·h⁻1, respectively, under C/N ratios from 2.2-8.0. High-throughput sequencing and metagenomic analysis revealed that heterotrophic nitrification and aerobic denitrification dominated nitrogen transformation, with microorganisms utilising low-energy nap and nirK enzymes to adapt to the ultra-low DO environment. These findings provide novel insights into energy-efficient nitrogen removal pathways under ultra-low oxygen conditions.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-12"},"PeriodicalIF":2.0,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145033021","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

Effect of biochar-doped rare earth tailing on soil properties and plant growth in reclaimed shale gas sites. 掺生物炭稀土尾矿对再生页岩气场地土壤性质和植物生长的影响

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-10 DOI: 10.1080/09593330.2025.2556347

Tianju Zhu, Minglang Zhou, Yangqing Wu, Hongyang Ren, Bin Wang

{"title":"Effect of biochar-doped rare earth tailing on soil properties and plant growth in reclaimed shale gas sites.","authors":"Tianju Zhu, Minglang Zhou, Yangqing Wu, Hongyang Ren, Bin Wang","doi":"10.1080/09593330.2025.2556347","DOIUrl":"https://doi.org/10.1080/09593330.2025.2556347","url":null,"abstract":"The soil in reclaimed shale gas sites is compacted and suffers from issues like poor drainage, drought conditions, and nutrient deficiency, posing challenges for agricultural production. In this study, rare earth tailings were incorporated into biochar at different mass ratios (rare earth tailings: biochar = 1:1, 1:2, 1:3, 1:4). Subsequently, a series of rare earth tailings-doped biochar materials (REE-BC) were prepared by calcination at 700°C. The impact of REE-BC on the soil in reclaimed shale gas sites was evaluated by pot experiment. The results showed that the pH, moisture content, nutrients (N, P, K), organic matter, and enzyme activities in the treated soil were all increased, while the soil bulk density was decreased. At the same time, the chlorophyll, soluble sugar, soluble protein, and activities of antioxidant enzymes in Chinese cabbage were increased, while the malondialdehyde content was decreased. Additionally, FT-IR analysis detected an absorption peak at 550 cm-1, indicating the successful loading of Ce onto the biochar. SEM-EDS and BET analyses showed that the biochar modified by secondary pyrolysis had a larger specific surface area and pore volume, which was conducive to increasing soil porosity and water retention. This study demonstrates the potential of REE-BC in improving soil properties and promoting Chinese cabbage growth, providing theoretical basis for novel approach for reclaiming shale gas-affected soils.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-13"},"PeriodicalIF":2.0,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145032905","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

Investigating the early-stage emissions of formaldehyde/VOCs from building materials and their influencing factors. 研究建筑材料甲醛/挥发性有机化合物的早期排放及其影响因素。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-07 DOI: 10.1080/09593330.2025.2552502

Zhu Cheng, Nuoa Lei, Jie Xiong

{"title":"Investigating the early-stage emissions of formaldehyde/VOCs from building materials and their influencing factors.","authors":"Zhu Cheng, Nuoa Lei, Jie Xiong","doi":"10.1080/09593330.2025.2552502","DOIUrl":"https://doi.org/10.1080/09593330.2025.2552502","url":null,"abstract":"As urbanization accelerates, the issue of pollutant discharge from building materials has become the focus of public attention. Conducted in a ventilated environmental chamber, the experiments investigated the emission characteristics of VOCs from dry and wet building materials, focusing on the influencing factors, such as temperature, relative humidity (RH), ventilation, and seasonality. The impact of influencing factors was quantified using a one-factor-at-a-time control method. This study establishes that environmental factors - temperature, RH, air exchange rate (AER), and seasonality - significantly influence VOC emissions from building materials. Elevated temperature and humidity consistently increase emission rates and concentrations, while higher AER reduces indoor VOC levels. Emissions peak rapidly upon material installation, decline sharply, and stabilize within predictable ranges. Seasonal variations show summer (high temperature/RH) yielding maximum emissions, contrasting with winter minima. Dry and wet materials exhibit similar emission trends, though temperature exerts a stronger effect on formaldehyde release from dry materials, while RH elevates peak and stable concentrations for wet materials. AER demonstrates dual effects: promoting initial emissions while diluting concentrations long-term, warranting further investigation. The C-history method efficiently determines initial emittable concentrations, and validated predictive models accurately forecast steady-state emissions across varying conditions. These models reliably estimate long-term pollutant levels using short-term data, proving valuable for indoor air quality assessment, material selection, and ventilation design. The study provides valuable insights into the practical significance of temperature, RH, ventilation, and seasonality on the emission rates of formaldehyde and TVOC from building materials.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-16"},"PeriodicalIF":2.0,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145014207","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

Factors affecting methane production and system recovery in mesophilic anaerobic digestion of food waste. 影响食物垃圾中温厌氧消化产甲烷和系统回收的因素。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-05 DOI: 10.1080/09593330.2025.2551908

Yujun Ma, Shuo Yang, Hongbo Wang, Mei Li, Liping Qiu

{"title":"Factors affecting methane production and system recovery in mesophilic anaerobic digestion of food waste.","authors":"Yujun Ma, Shuo Yang, Hongbo Wang, Mei Li, Liping Qiu","doi":"10.1080/09593330.2025.2551908","DOIUrl":"https://doi.org/10.1080/09593330.2025.2551908","url":null,"abstract":"Food waste (FW) has high production potential that can be converted into renewable energy in the form of biogas during anaerobic digestion (AD). Batch tests under mesophilic (37°) disgestion were performed to evaluate the effects of different dosage ratios (10-35%), salts (0-20 g·L-1) and oil content (0-20 g·L-1) on methane (CH4) production, process stability and organic reduction during the AD. The results showed that optimal CH4 occurred at a dosage ratio of 20%, while ratios > 30% caused inhibition. Salt (<5 g·L-1) enhanced AD efficiency, peaking at 314.75 mL CH4 production g VS-1 (1 g·L-1 salt), whereas > 15 g·L-1 salt suppressed methanogenesis. Oil at 15 g·L-1 maximized methane yield (393.66 mL CH₄ production g VS-1) with 12-day digestion, while 20 g·L-1 oil induced inhibition. Excessive organic loading rate (OLR) (>3.0 g VS/L/d) triggered the accumulation of Volatile Fatty Acids (VFAs) > 20,000 mg/L and an acidification pH = 5.94, collapsing biogas production; recovery via pH adjustment, starvation, and sludge inoculation reduced VFAs by 96-100%, restoring stable biogas output (0.63-2.09 L/L/d) with neutral pH = 7.35 and 65% methane content. Microbial synergy and VFA degradation ensured system resilience under safe OLR ≤ 3.0 g VS/L/d, highlighting FW's viability for renewable energy recovery.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-14"},"PeriodicalIF":2.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000034","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

Modeling and simulation of a modified Ludzack-Ettinger wastewater treatment bioprocess based on the concept of multifunctional microbiota. 基于多功能微生物群概念的改良Ludzack-Ettinger废水处理生物过程建模与仿真。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-05 DOI: 10.1080/09593330.2025.2551907

Abraham Moises Yehezkel-Cortes, Nora Ruiz-Ordaz, Juvencio Galíndez-Mayer, Soledad González-Juárez, Valeria Gómez-Murcia

{"title":"Modeling and simulation of a modified Ludzack-Ettinger wastewater treatment bioprocess based on the concept of multifunctional microbiota.","authors":"Abraham Moises Yehezkel-Cortes, Nora Ruiz-Ordaz, Juvencio Galíndez-Mayer, Soledad González-Juárez, Valeria Gómez-Murcia","doi":"10.1080/09593330.2025.2551907","DOIUrl":"https://doi.org/10.1080/09593330.2025.2551907","url":null,"abstract":"This research investigates the behavior of key components within aerobic and anoxic bioreactors in Biological Nitrogen Removal (BNR) bioprocesses. A mathematical model based on the Modified Ludzack-Ettinger (MLE) configuration is proposed. The model comprises an ensemble of ten differential equations derived from mass balances in the MLE system, complemented with a set of biokinetic models. To reduce complexity and enhance applicability, the model treats all nitrogen and phosphorus compounds as atomic N and P, and aggregates carbon sources as Chemical Oxygen Demand (COD), eliminating the need for tuning complex compound-specific parameters. The model was calibrated and validated using analytical determinations of nitrogen, phosphorus, COD, dissolved oxygen, and biomass concentrations from experiments conducted with synthetic wastewater in aerobic and anoxic reactors. Complementing this, a metagenomic study characterized the diversity and relative abundance of taxonomic groups involved in nitrogen and phosphorus metabolism within the microbial communities. Utilizing biokinetic and stoichiometric parameters for the entire microbiota, the model can be solved for both transient and steady-state conditions across a range of operational variables. It enables the estimation of bioprocess resilience following disturbances and the subsequent recovery time to a new steady state. A one-at-a-time (OAT) sensitivity analysis identified the parameters most significantly affecting state variables. The experimental results confirm the model's validity and reliability in simulating BNR processes.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-15"},"PeriodicalIF":2.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000042","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

The novel KiteMix system for anaerobic wastewater treatment ponds tested at the pilot-scale under varied substrate viscosity and mixing velocity. 新型KiteMix系统用于厌氧废水处理池塘，在不同基质粘度和混合速度下进行了中试。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-02 DOI: 10.1080/09593330.2025.2551387

Hermann Velten, Marcel Pingsmann, Carsten Linnenberg, Ulf Theilen, Harald Weigand, Felix Brück

{"title":"The novel KiteMix system for anaerobic wastewater treatment ponds tested at the pilot-scale under varied substrate viscosity and mixing velocity.","authors":"Hermann Velten, Marcel Pingsmann, Carsten Linnenberg, Ulf Theilen, Harald Weigand, Felix Brück","doi":"10.1080/09593330.2025.2551387","DOIUrl":"https://doi.org/10.1080/09593330.2025.2551387","url":null,"abstract":"Pond systems represent the simplest and most widely used technology for treating high-strength wastewater containing biodegradable suspended solids. When covered, they offer advantages such as odour control, intensified organics degradation, and biomethane capture. However, their efficiency is often limited by unmixed zones and the formation of floating or sinking layers, which reduce residence times and treatment performance. Here, we developed a novel mixing concept for anaerobic pond systems and systematically tested its mixing efficiency. The novel mixing concept avoids permanently installed mechanical components and instead relies on a planar, kite-like mixing tool that is moved horizontally through the pond by an external rope-guided system. This design enables flexible, low-maintenance operation with minimal energy input and is particularly suitable for shallow, large-scale ponds where conventional submerged mixers are impractical. Three different mixing tool designs were evaluated using dye and conductivity tracer experiments with model substates in a 330 L pilot-scale pond. All tools were based on perforated planar plates with identical open area ratio (44 %), but differed in hole geometry. The effect of substrate viscosity was assessed at two distinct velocities. Results showed that increasing viscosity significantly prolonged the mixing time, while doubling the mixing velocity reduced it by a factor of four. The mixing tool design strongly impacted flow patterns and therewith the mixing efficiency. Findings were integrated into an operation scheme for full-scale anaerobic pond systems equipped with planar mixing tools that accounts both for the mixing performance and the economic efficiency.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-16"},"PeriodicalIF":2.0,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947821","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