Environmental Technology最新文献_第3页

Experimental study of Nd₂O₃ doped iron-based oxygen carrier for biomass chemical looping steam gasification process. 掺Nd2O3的铁基氧载体用于生物质化学循环蒸汽气化过程的实验研究。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-10-01 Epub Date: 2025-06-30 DOI: 10.1080/09593330.2025.2521761

Guangjie Zhao, Liang Jin, Long-Jie Yu, Kun Song, Lanfang Huang, Qunxing Huang, Zhixiang Feng, Jianhua Yan

{"title":"Experimental study of Nd2O3 doped iron-based oxygen carrier for biomass chemical looping steam gasification process.","authors":"Guangjie Zhao, Liang Jin, Long-Jie Yu, Kun Song, Lanfang Huang, Qunxing Huang, Zhixiang Feng, Jianhua Yan","doi":"10.1080/09593330.2025.2521761","DOIUrl":"10.1080/09593330.2025.2521761","url":null,"abstract":"Oxygen carrier (OC) is vital in the biomass chemical looping process because the OC plays the multiple roles of lattice oxygen supply, heat transfer, and catalyst. In the current study, neodymium oxide doped iron-based oxygen carriers (Nd2O3-Fe2O3 OC) recycled from the Nd-Fe-B sintered magnet waste scraps and experimentally synthesized with various Nd2O3 weight ratios were used in the biomass chemical looping steam gasification (BCLSG) process for syngas production. The properties of the fresh and used Nd2O3-Fe2O3 OCs were characterized using different methods, including XRD, H2-TPR, and SEM-EDS. Results showed that the activity of Fe2O3 was dramatically enhanced by Nd2O3 doping due to the formation of NdFeO3 perovskite oxide in the Nd2O3-Fe2O3 OCs. The synergistic effect of Nd2O3 and Fe2O3 could exhibit more oxygen vacancies and enhance the catalytic activity of the OCs. Syngas yields exceeding 0.90 Nm3/kg, an H2/CO mole ratio around 1.80 and carbon conversion efficiencies above 71% were reached with the Nd2O3-Fe2O3 OCs during the BCLSG process at 900°C, OC/B = 2:1, and S/B = 0.4. The generation of NdFeO3 perovskite oxide mitigated the negative effect caused by the outward diffusion of Fe in the OCs, resulting in a stable performance of the Nd2O3-Fe2O3 OC during the multi-cycle BCLSG process. The recycled Nd2O3-Fe2O3 OC may be a better choice than the experimental synthesized one because its manufacturing method is more accessible, and does not require additional Nd2O3.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4852-4865"},"PeriodicalIF":2.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144527023","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

UVC/Sulfite coupled to persulfate for removing chlorinated compounds under oxic conditions: effects of process variables, transformation products and toxicity. UVC/亚硫酸盐偶联过硫酸盐在氧化条件下去除氯化化合物：工艺变量、转化产物和毒性的影响。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-10-01 Epub Date: 2025-07-04 DOI: 10.1080/09593330.2025.2524211

Roberta F Nunes, Julio C O Ribeiro, Valter H Carvalho-Silva, Dionysios D Dionysiou, Antonio C S C Teixeira

{"title":"UVC/Sulfite coupled to persulfate for removing chlorinated compounds under oxic conditions: effects of process variables, transformation products and toxicity.","authors":"Roberta F Nunes, Julio C O Ribeiro, Valter H Carvalho-Silva, Dionysios D Dionysiou, Antonio C S C Teixeira","doi":"10.1080/09593330.2025.2524211","DOIUrl":"10.1080/09593330.2025.2524211","url":null,"abstract":"Chlorinated phenols are persistent pollutants frequently detected in industrial effluents and contaminated surface waters, posing risks to aquatic ecosystems. Herein, the best initial sulfite concentration [SO32-]0 and initial pH for the degradation of 2,4-dichlorophenol (2,4-DCP) in the presence of sulfite under UVC radiation and oxic conditions are reported. Low sulfite dosages (60-150 mg L-1) were explored to use UVC/sulfite as a pretreatment for persulfate (PS)-based processes. The UVC/persulfate (UVC/PS), UVC/sulfite, and combined UVC/sulfite + PS processes were used for the degradation of 2,4-DCP and 2,3,4,6-tetrachlorophenol (2,3,4,6-TeCP). Results have shown that increasing [SO32-]0 up to 60 mg L-1 (pH0 ∼ 8.5) has led to higher 2,4-DCP degradations through UVC/sulfite. In contrast, at pH0 values around 3, 5, and 10, direct photolysis of 2,4-DCP and 2,3,4,6-TeCP occurred. Removals of 2,4-DCP and 2,3,4,6-TeCP were improved by the addition of PS after the UVC/sulfite pretreatment, at optimum conditions. Hydroxylation was predominant in the UVC/sulfite + PS system, by improved generation of hydroxyl radicals, in addition to a slightly higher contribution of sulfate radicals. Low molecular weight acids were observed as transformation products for the UVC/sulfite + PS process, due to dechlorination and cleavage of the benzene ring. Finally, according to predictions from the ECOSAR (Ecological Structure-Activity Relationships) program, fewer toxic products were identified for different organisms (fish, daphnids and green algae) in the UVC/sulfite + PS process. This result is important and reinforces that the UVC/sulfite + PS process in the presence of oxygen can lead to lower toxicity of the treated water.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"5011-5026"},"PeriodicalIF":2.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144559600","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

Exploring the biodegradation of PET in mangrove soil and its intermediates by enriched bacterial consortia. 探讨富菌群对红树林土壤中PET及其中间体的生物降解作用。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-10-01 Epub Date: 2025-07-09 DOI: 10.1080/09593330.2025.2521762

Muhammad Bashir Saidu, Irina S Moreira, Catarina L Amorim, Rongben Wu, Yuen-Wa Ho, James Kar-Hei Fang, Paula M L Castro, David Gonçalves

{"title":"Exploring the biodegradation of PET in mangrove soil and its intermediates by enriched bacterial consortia.","authors":"Muhammad Bashir Saidu, Irina S Moreira, Catarina L Amorim, Rongben Wu, Yuen-Wa Ho, James Kar-Hei Fang, Paula M L Castro, David Gonçalves","doi":"10.1080/09593330.2025.2521762","DOIUrl":"10.1080/09593330.2025.2521762","url":null,"abstract":"The biodegradation of Polyethylene terephthalate (PET) is important due to the environmental impact of plastic waste. This study investigates the degradation of PET films in soil microcosms, with and without mangrove plants, and with mangrove plants bioaugmented with a bacterial consortium (Bacillus sp.- GPB12 and Enterococcus sp.- WTP31B-5) while following the evolution of soil microcosm microbiome. The ability of bacterial consortia retrieved from soil microcosms of each tested condition to degrade PET intermediates - bis(2-hydroxyethyl) terephthalate (BHET), terephthalic acid (TPA), and monoethylene glycol (MEG) was also assessed. In the microcosms' assays with mangrove plants, variations in functional groups and surface morphology detected by FTIR and SEM analysis indicated PET degradation. Soil microcosms microbiome evolved differently according to the conditions imposed, with dominance of phylum Proteobacteria in all final microcosms. After 270 days, bacterial consortia retrieved from all soil microcosms revealed to be able to completely degrade TPA within three days. MEG degradation reached ca. 84% using the consortium retrieved from the microcosm with bioaugmented mangrove plants. BHETdegradation was ca. 96% with the consortium obtained from the microcosm with non-bioaugmented mangrove plants. These intermediates are key molecules in PET degradation pathways; thus, their degradation is an indicator of biodegradation potential. To the best of authors' knowledge, this is the first report on biodegradation of PET, BHET, TPA, and MEG by microbial community from mangrove soil, providing insights into key taxa involved in PET degradation. These findings can pave a way to develop bioremediation strategies and more efficient waste management solutions.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"4866-4888"},"PeriodicalIF":2.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144590792","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

Abatement of CO2 under the microwave plasma torch system assisted with low-density coal. 低密度煤辅助下微波等离子体炬系统的CO2减排研究。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-25 DOI: 10.1080/09593330.2025.2560590

Yannick Kumona Balue, Hugues Nkomba Museba, Dzeyewir Divine Nyuyki, Bongju Lee

{"title":"Abatement of CO2 under the microwave plasma torch system assisted with low-density coal.","authors":"Yannick Kumona Balue, Hugues Nkomba Museba, Dzeyewir Divine Nyuyki, Bongju Lee","doi":"10.1080/09593330.2025.2560590","DOIUrl":"https://doi.org/10.1080/09593330.2025.2560590","url":null,"abstract":"Greenhouse gas emissions are abundantly produced every year by human activities. They are the main cause of global warming and the changes observed in the climate. In this study, we used the microwave plasma torch system (MPT) to drive the conversion of CO2 through the Boudouard reaction pathway. The necessary microwave power applied has efficiently activated the coal used as a reductant agent to initiate the chemical decomposition of CO2. The specific energy consumption reached 94 kJ/mol to ensure the continuous decomposition process of carbon dioxide under microwave plasma torch technology at atmospheric pressure. Experimentally, the conversion rate of 20 lpm of CO2 under the MPT developed in this research reached 64% at a moderate temperature of 680°C with a specific recipe composed of the operating conditions coupled to the geometry of the designed reactor. In addition, the numerical model built in Aspen Plus V12 supported the experimental results by producing similar patterns in the conversion of CO2 as a function of microwave power. Thus, the entire process tends to be energy-saving and an efficient solution for greenhouse gas mitigation for a clean and sustainable environment.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-12"},"PeriodicalIF":2.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145136769","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

Control of phosphorus release from sediment by humic acid-loaded ferrihydrite and magnetite. 含腐植酸的水合铁和磁铁矿控制沉积物中磷的释放。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-25 DOI: 10.1080/09593330.2025.2559206

Longhai Ding, Jianwei Lin, Yanhui Zhan

{"title":"Control of phosphorus release from sediment by humic acid-loaded ferrihydrite and magnetite.","authors":"Longhai Ding, Jianwei Lin, Yanhui Zhan","doi":"10.1080/09593330.2025.2559206","DOIUrl":"https://doi.org/10.1080/09593330.2025.2559206","url":null,"abstract":"This study investigated the efficacy and mechanisms of humic acid (HA)-loaded ferrihydrite (Fh) and magnetite (Mag) in suppressing phosphorus (P) release from sediment into the overlying water (OW) via direct capping, fabric-wrapped capping, and sediment amendment. The results showed that the direct capping, fabric-wrapped capping, and sediment amendment with HA-loaded ferrihydrite (HA-Fh) and magnetite (HA-Mag) effectively mitigated the sedimentary P migration into OW. Specifically, the average reduction efficiencies of soluble reactive phosphorus (SRP) in OW were 94.6%, 74.6%, and 45.0% for HA-Fh under direct capping, fabric-wrapped capping, and amendment conditions, respectively. For HA-Mag, the corresponding efficiencies were 83.9%, 71.1%, and 47.1%. Under HA-Fh and HA-Mag capping, P in the sediment continued to mobilise into the pore water through the microbial and sulphide-mediated chemical reduction of iron (III) (hydr)oxides. However, the capping layers significantly reduced the concentrations of pore water SRP and labile P measured by diffusive gradients in thin-films (DGT) in the upper sediment. This reduction was crucial for effectively intercepting the sedimentary P migration into OW by HA-Fh and HA-Mag. Our study demonstrates that HA-Fh and HA-Mag are effective capping materials for managing the sediment-derived internal P loading. In other words, even after HA aging treatment, Fh and Mag still remain effective sediment phosphorus release control materials. In addition, the direct capping methods using HA-Fh and HA-Mag are promising due to their high control efficiency and ease of application in preventing P release from sediment into OW.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-31"},"PeriodicalIF":2.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145136805","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

Bioleaching of different types of metals by Exiguobacterium himgiriensis isolated from printed circuit board. 印制板中不同类型金属的浸出研究。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-23 DOI: 10.1080/09593330.2025.2560589

Banhi Halder, Vinod Kumar Nigam, Muthu Kumar Sampath

{"title":"Bioleaching of different types of metals by Exiguobacterium himgiriensis isolated from printed circuit board.","authors":"Banhi Halder, Vinod Kumar Nigam, Muthu Kumar Sampath","doi":"10.1080/09593330.2025.2560589","DOIUrl":"https://doi.org/10.1080/09593330.2025.2560589","url":null,"abstract":"The ubiquity of electronic devices has made them indispensable in daily life. Nevertheless, this high priority leads to a surge in electronic waste, or e-waste, which is extremely dangerous for the environment and human health. E-waste contributes to environmental pollution and threatens ecosystems and human health. Management of recycling methods and efficient e-waste is crucial to lower these dangers. Traditional recycling techniques are effective, but often release harmful pollutants. The present study has attempted to use the metal-resistant Exiguobacterium himgiriensis isolated from e-waste, such as the Printed Circuit Board (PCB), to investigate its efficiency in removing heavy metals from these substrates. By using ICP-OES, it has been found that this species of bacterium recovered different types of metals (Co 84.67%, Ni 83.25%, Pb 80.17%, Cu 80.06%, Zn 76.71%, Al 76.13%, Fe 71.74%, and Ag 64.97% respectively) within 5 days under laboratory conditions. Detecting structural and functional group changes in the control PCB and bioleached residue by the FT-IR, FE-SEM, EDS, and XRD techniques confirms the evidence of bioleaching. Bacteria can increase their dissolving capacity and decrease surface tension by chemically changing metals. E. himgiriensis bioleaches PCB samples for 5 days, resulting in rougher, uneven surfaces with fractures and fissures. FT-IR spectroscopy reveals the bacterium's impact on metals, particularly Si, O, and Fe. This study could help reduce environmental pollution and health risks associated with e-waste by developing an economical and environmentally friendly method for bioleaching different metals in PCB.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-13"},"PeriodicalIF":2.0,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145130384","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

Streamlined regeneration of cathode materials from spent lithium-ion batteries with deep eutectic solvents. 用深共晶溶剂从废锂离子电池中流线型再生正极材料。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-22 DOI: 10.1080/09593330.2025.2562374

Binling Li, Tangshu Li, Yixing Wang, Jian Liu

{"title":"Streamlined regeneration of cathode materials from spent lithium-ion batteries with deep eutectic solvents.","authors":"Binling Li, Tangshu Li, Yixing Wang, Jian Liu","doi":"10.1080/09593330.2025.2562374","DOIUrl":"https://doi.org/10.1080/09593330.2025.2562374","url":null,"abstract":"With the increasing generation of spent lithium-ion batteries (LIBs), there is an urgent need for efficient and environmentally friendly recycling methods. Compared to traditional pyrometallurgical and hydrometallurgical processes, deep eutectic solvents (DESs) offer advantages for recycling valuable metals from spent LIBs, including better biocompatibility and high recovery efficiency. However, complex procedures, long processing times, and solvent regeneration remain challenges. To address these limitations, we propose a streamlined recycling approach using a DES synthesised from guanidine hydrochloride (GUC) and tartaric acid (TA). This method promotes Li enrichment in the leachate while Co, Ni, and Mn mainly precipitate. Adding ethanol as an antisolvent enhances crystallisation and precipitation, producing Li-rich solutions and precursors containing only trace amounts of Li for Co-Ni-Mn (NCM) cathodes. Subsequent carbonisation converts Li into Li2CO3, which is then mixed with precursors in controlled ratios and subjected to high-temperature solid-state sintering to regenerate NCM cathode materials. Notably, ethanol and the DES are recovered by distillation with recovery efficiencies of 91.6% and 80%, respectively. This optimised process achieves leaching of NCM cathode materials under mild conditions and significantly improves the separation efficiency between Li and Co/Ni/Mn through a simplified workflow. Overall recovery efficiencies reach 97.51% for Li, 98.57% for Ni, 100% for Co, and 97.24% for Mn in regenerated NCM materials. This study presents a green, efficient, and simplified method for recovering valuable metals from spent LIB cathode materials.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-12"},"PeriodicalIF":2.0,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145124167","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

Construction of an autotrophic nitrifying granular sludge partial nitritation system based on reaction rate. 基于反应速率的自养硝化颗粒污泥部分硝化系统的构建。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-17 DOI: 10.1080/09593330.2025.2558240

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

{"title":"Construction of an autotrophic nitrifying granular sludge partial nitritation system based on reaction rate.","authors":"Lingcong Zeng, Jinqiang Guan, Shengping Wen, Shijia Gui, Liujia Wang, Shaoqin Li, Xianxiong Cheng, Yuanyuan Cheng, Bei Long","doi":"10.1080/09593330.2025.2558240","DOIUrl":"https://doi.org/10.1080/09593330.2025.2558240","url":null,"abstract":"This study presented a strategy for rapid establishing partial nitritation using autotrophic nitrifying granular sludge (ANGS), offering a green and efficient solution for treating ionic rare earth mining wastewater, which is characterised by acidic pH, low organic content, and elevated ammonia nitrogen. Experiments were conducted in a sequencing batch reactor (SBR) inoculated with stored granules. By Day 8, the ANGS demonstrated excellent recovery of activity, with the nitrite accumulation rate (NAR) exceeding 90%. Through controlled aeration intensity, the ammonia oxidation rate and nitrite oxidation rate of the ANGS were leveraged to regulate aeration time. A NO2--N/NH4+-N ratio of approximately 1.32 was firstly achieved by Day 25 when the nitrogen loading rate (NLR) was 0.24 kg/m3·d, and partial nitritation was also achieved by Days 41, 54, 70 and 85 respectively when the NLRs were 0.30, 0.36, 0.42, and 0.48 kg/m³·d. Ammonia oxidising bacteria (AOB) remained highly active, while nitrite oxidising bacteria (NOB) were effectively suppressed. By the conclusion of the experiment on Day 90, the dominant microbial communities in the reactor were Nitrosomonas (20.32%), Thauera (12.57%), and OLB8 (10.60%). Metagenomic analysis revealed a significant enhancement in the relative abundance and activity of amoC (encoding ammonia monooxygenase) and hao (encoding hydroxylamine oxidoreductase) in AOB. The calculated conversion costs for different NLRs per cycle were 4.646, 6.845, 8.901, 9.538 and 10.222 RMB/m3.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-16"},"PeriodicalIF":2.0,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145080058","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

Orthogonal array optimisation of aerobic co-composting of abamectin mycelial dregs, excess sludge, and maize straw. 阿维菌素菌丝渣、剩余污泥和玉米秸秆好氧共堆肥的正交优化。

IF 2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-09-17 DOI: 10.1080/09593330.2025.2557581

Panbo Deng, Yanhui Xu, Xiaoman Shan, Jianying Lan, Ye Lv, Dianwei Qi, Jinshan Zhang, Haiming Jiang, Xia Li

{"title":"Orthogonal array optimisation of aerobic co-composting of abamectin mycelial dregs, excess sludge, and maize straw.","authors":"Panbo Deng, Yanhui Xu, Xiaoman Shan, Jianying Lan, Ye Lv, Dianwei Qi, Jinshan Zhang, Haiming Jiang, Xia Li","doi":"10.1080/09593330.2025.2557581","DOIUrl":"https://doi.org/10.1080/09593330.2025.2557581","url":null,"abstract":"Aerobic co-composting represents an effective method for the treatment of antibiotic fermentation residues. This study optimized the co-composting of abamectin mycelial dregs (AMDs), excess sludge, and maize straw using an orthogonal experimental design. Composting was performed at a mass ratio of 4:1:1 (dry weight) under varying initial C/N ratios (20:1-30:1), moisture contents (50%-70%), and microbial inoculant dosages (5%-15%). Key parameters monitored included physicochemical properties, abamectin removal efficiency (RRA), and residual abamectin levels in the final product. The treatment with C/N = 30:1, moisture content = 60%, and inoculant dosage = 5% resulted in the longest thermophilic phase (6 days), highest temperature (59°C), highest germination index (90.05%), and highest RRA (89.67%), along with the lowest final moisture (24.95%) and residual abamectin (0.34 mg/g). Multivariate analysis of variance indicated that initial C/N, moisture, and inoculant dosage significantly influenced compost properties and abamectin degradation. Range analysis further identified the optimal conditions as C/N = 30:1, moisture = 70%, and inoculant = 5%. Microbial diversity analysis revealed key genera involved in the process, including Saccharomonospora, Bacillus, Kroppenstedtia, and Aspergillus. This study confirms the feasibility of aerobic co-composting for AMD treatment and offers new insights into its microbial mechanisms.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1-18"},"PeriodicalIF":2.0,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145079984","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 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