Journal of chemical technology and biotechnology最新文献

{"title":"Enhancing biogas production from water hyacinth juice through biochar addition in an upflow anaerobic sludge blanket reactor","authors":"Gemechu Kassaye,&nbsp;Nigus Gabbiye,&nbsp;Eshetu Getahun,&nbsp;Shin-ichi Akizuki,&nbsp;Zenamarkos Bantie,&nbsp;Pranshu Bhatia,&nbsp;Masaaki Fujiwara,&nbsp;Solomon Addisu,&nbsp;Shinjiro Sato","doi":"10.1002/jctb.70039","DOIUrl":"https://doi.org/10.1002/jctb.70039","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Recently, sequential crushing and compression pretreatment of water hyacinth has gained attention for its ability in removing recalcitrant lignocellulose components and extract easily from biodegradable water hyacinth juice, facilitating rapid anaerobic digestion (AD) systems. In this work, AD experiments were performed in lab-scale upflow anaerobic sludge blanket (UASB) reactors using water hyacinth juice as a substrate. To ensure the stability and enhance performance of AD, a batch experiment was performed to select the carbonization temperature and biochar size. The selected biochar was then added to the reactor and compared with the control reactor. The reactors were continuously operated for 65 days to evaluate the treatment efficiency under different hydraulic retention times (HRTs) (4, 2, and 1 days).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>A carbonization temperature of 800 °C with a particle size of 1.58 mm was found to have a higher specific surface area of 519.538 m² g⁻¹ and a better pore size of 0.078 mL g⁻¹. Biogas yields were similar between reactors with and without biochar: 208 ± 86, 370 ± 93, and 393 ± 73 mL g-<i>VS</i>⁻¹ (with biochar) and 218 ± 88, 375 ± 107, and 400 ± 74 mL g-<i>VS</i>⁻¹ (without biochar) at 4, 2, and 1-day HRTs, respectively. However, biochar addition improved methane quality, increasing methane content from 78.11% to 81.64% and reducing CO₂ from 21.89% to 18.54%. Both systems achieved high soluble chemical oxygen demand (COD) removal at 1 day HRT: 87.1% with biochar and 85.9% without.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The results indicate that addition of biochar into AD systems offers multiple benefits in enhancing stability and producing a high-quality methane yield. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 11","pages":"2289-2298"},"PeriodicalIF":2.4,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intensifying hydrogenotrophic methanogenesis in electrode-assisted UASB reactor under room-temperature conditions","authors":"Tania P. Mendoza-Tinoco,&nbsp;María del Carmen Fajardo-Ortiz,&nbsp;Ulises Durán-Hinojosa,&nbsp;Víctor Sánchez-Vázquez,&nbsp;Ignacio González,&nbsp;Ricardo Beristain-Cardoso","doi":"10.1002/jctb.70036","DOIUrl":"10.1002/jctb.70036","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Anaerobic digestion is a widely used and cost-effective technology for wastewater treatment and renewable energy recovery through biogas production. However, its efficiency significantly decreases under sub-mesophilic or room-temperature conditions due to the low metabolic activity. Recent approaches have explored electrical stimulation to enhance microbial performance. This study investigates the effect of electrical stimulation via current density (ESCD) on the performance of an upflow anaerobic sludge blanket (UASB) reactor operating at room temperature.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Two 2 L UASB reactors were operated at a 12 h hydraulic retention time using domestic wastewater (chemical oxygen demand: 2 ± 0.1 g L⁻¹). The control reactor (R_C) had no electrodes, whereas the experimental reactor (R_E) was equipped with RuO₂/Ti mesh electrodes, to which a current density of 0.54 mA cm⁻² was applied. R_E showed an 86% increase in biogas production with 68% CH₄, 21% CO₂ and 11% H₂, resembling Hythane. Methane generation shifted toward hydrogenotrophic pathways (65%) over acetoclastic (35%). Compared to the biogas produced by R_C, that from R_E had a 23% higher calorific value and nearly twice the methane yield. Sludge from R_E exhibited a 17% lower sedimentation rate, 44% higher sludge volumetric index, and more compact granules enriched with filamentous microbes (confirmed via scanning electron microscopy). Content of extracellular polymeric substances increased by 52% and was particularly rich in proteins.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study demonstrates, for the first time, that electrical stimulation via current density (0.54 mA cm⁻²) using RuO₂/Ti mesh electrodes in a UASB reactor operating at room temperature can significantly enhance hydrogenotrophic methanogenesis. The electrode-assisted UASB reactor maintained continuous and elevated methane production, presenting a promising single-reactor strategy capable of high performance under room-temperature conditions without the need for external temperature control. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2208-2216"},"PeriodicalIF":2.4,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of ZnO/TiO2–biochar from durian husk for efficient dye adsorption and degradation","authors":"Tran Minh Khang,&nbsp;Tran Thi Bich Quyen,&nbsp;Luong Huynh Vu Thanh,&nbsp;Ngo Nguyen Tra My,&nbsp;Bui Le Anh Tuan,&nbsp;Duy Toan Pham,&nbsp;Nguyen Thi Kim Lien,&nbsp;Doan Van Hong Thien,&nbsp;Ngo Truong Ngoc Mai","doi":"10.1002/jctb.70038","DOIUrl":"10.1002/jctb.70038","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The overuse of dyes is causing serious water pollution globally, becoming an urgent environmental problem. Consequently, studying dye wastewater treatment solutions has become a crucial research field. While durian husk biochar (BDH) is recognized for its excellent adsorption of organic molecules, studies on its combination with ZnO and TiO₂ nanoparticles (NPs) and enhancement of methylene blue (MB) degradation remain limited.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>In this study, BDH/ZnO/TiO₂ NPs were synthesized via a hydrothermal method using ethanol and ammonia as solvents. BHD was produced through pyrolysis under oxygen-limited conditions and activated with H₃PO₄ to enhance its physicochemical properties. The resulting TiO₂ (anatase phase, 20–35 nm) and ZnO (wurtzite structure, 100–240 nm) were well dispersed on the porous biochar matrix, which exhibited increased porosity (14.761–34.143 Å) and surface area approximately 5.5 times higher than raw biochar. The photocatalytic and adsorption performance of the materials were evaluated under UV irradiation (365 nm, 100 min) using 10 ppm MB. The removal efficiency of BDH achieved 75.77%, significantly outperforming pure TiO₂ (58.52%) and ZnO (40.38%). The novel BDH/ZnO/TiO₂ nanocomposite exhibited superior capabilities, achieving 98.57% removal and maintaining over 95% efficiency after three regeneration cycles. The adsorption of MB by BDH/ZnO/TiO₂ best fits the Freundlich isotherm model, showing a maximum adsorption capacity of 52.21 mg g⁻¹.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>These results highlight the dual functionality of BDH/ZnO/TiO₂ NPs in dye adsorption and photocatalytic degradation, confirming their potential in wastewater treatment. The study also emphasizes the environmental and economic benefits of valorizing agricultural waste into high-performance, sustainable materials. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2217-2229"},"PeriodicalIF":2.4,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monoethanolamine deep eutectic solvent on isolation of cardanol from cashew nutshell liquid","authors":"Anantharaj Ramalingam,&nbsp;Vichitra Malaiyarasan,&nbsp;Gayathri Mahavishnu","doi":"10.1002/jctb.70034","DOIUrl":"10.1002/jctb.70034","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Monoethanolamine-based deep eutectic solvent (MEADES) at different molar ratios (1:2, 1:3, 1:4, 1:5, 1:6, and 1:7) was prepared and used for the isolation of cardanol from cashew nutshell liquid (CNSL).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>In this work, the density of MEADES at different molar ratios (1:2, 1:3, 1:4, 1:5, 1:6, and 1:7), isobutyl methyl ketone (IBMK), ethyl acetate (EtAc), acetone, hexane, methanol, ethanol, and butanol was measured at different temperatures (293.15–343.15 K). Subsequently, the density of the binary mixture of IBMK with EtAc over the whole composition range was measured at different temperatures (293.15–343.15 K). Further, the pH of all the prepared MEADES was determined and functional group analysis was carried out using Fourier transform infrared (FTIR) spectroscopy. Finally, the experimental isolation of cardanol was conducted with feed:ternary mixtures at different solvent ratios (50:150, 50:125, 5:100, and 50:75 mL) and characterized using FTIR spectroscopy and gas chromatography–mass spectrometry.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>It was observed that all the prepared deep eutectic solvents have strong hydrogen bonds between choline chloride (ChCl) and monoethanolamine (MEA) at all the studied molar ratios when the wavenumbers of individual compounds with mixtures of ChCl and MEA were compared. All the prepared MEADES used for isolation of cardanol from CNSL by varying the feed:ternary solvent ratios. It was concluded that the percentage of cardanol isolation was strongly dependent on the molar ratio of ChCl and MEA, and the volume of IBMK and EtAc as cosolvent in their mixtures. 98.93% cardanol isolation was achieved when using a 50 mL CNSL:75 mL mixture of solvents (i.e., 25 mL MEADES:25 mL IBMK:25 mL EtAc). © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2200-2207"},"PeriodicalIF":2.4,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation of a biorefinery process from the organic fraction of municipal solid waste generated in Mexico City","authors":"Arturo Pérez-Roman,&nbsp;Teresa Lopez-Arenas,&nbsp;Mauricio Sales-Cruz,&nbsp;José Rocha-Rios","doi":"10.1002/jctb.70018","DOIUrl":"10.1002/jctb.70018","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>In this work, a biorefinery process was designed and simulated in Aspen Plus® V.10 for production of biogas, bioethanol, and biofertilizer from the Organic Fraction of Municipal Solid Waste (OFMSW) generated in Mexico City (CDMX). The process consists of five stages: (i) anaerobic digestion, (ii) acid hydrolysis, (iii) simultaneous saccharification and co-fermentation, (iv) conventional distillation, and (v) dehydration by extractive distillation. Stirred tank and stoichiometric reactors were used for the anaerobic biodigester simulation, while stoichiometric reactors were employed for simulation of the acid hydrolysis, and simultaneous saccharification and co-fermentation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The overall results of the simulated process show that it is possible to obtain 149.6 Tons of Biogas, 41.9 Tons of Biofertilizer and 19.7 Tons of Bioethanol from 1000 Tons of OFMSW processed daily, which is equivalent to a total yield of 0.21 Ton Bioproducts/Ton OFMSW or 0.947 Ton Bioproducts/Ton Volatile Solids contained in the OFMSW.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>The conceptual design and simulation of the biorefinery process presented in this work indicate that it is technically feasible to obtain 3 different bioproducts from the OFMSW generated in CDMX. Computer-aided process design will allow progress towards the circular economy, where biorefineries will play a leading role. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2053-2064"},"PeriodicalIF":2.4,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Fenton and Fered-Fenton processes for sustainable management of textile reverse osmosis concentrate: multivariate analysis approach","authors":"Gamze Canbakal,&nbsp;Öykü Nur Ersoz,&nbsp;Gulay Arslan Cene,&nbsp;Senem Yazici Guvenc,&nbsp;Emine Can-Güven,&nbsp;Gamze Varank","doi":"10.1002/jctb.70030","DOIUrl":"10.1002/jctb.70030","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Water scarcity and increasingly stringent discharge regulations are driving the adoption of sustainable water management strategies, necessitating the reuse of industrial wastewater and the implementation of zero or near-zero liquid discharge systems. Reverse osmosis (RO) is an effective technology for recycling wastewater in the textile industry. The elevated resistivity and decreased biodegradability of contaminants in RO concentrates generate a novel wastewater stream.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>This study examines the reutilization of these wastewaters through Fenton and Fered-Fenton processes. The Box–Behnken design (BBD) was used to model process variables. The operational parameters for both processes were the H₂O₂/chemical oxygen demand (COD) ratio, Fe²⁺/H₂O₂ ratio, current density and reaction time. The evaluated system responses were COD, color index (CI) and ultraviolet absorbance at 254 nm (UV₂₅₄) and 280 nm (UV₂₈₀). The correlation coefficients (<i>R</i>²) for all created models approached 1, demonstrating the efficacy of the BBD method in modeling pollutant removal with the Fenton and Fered-Fenton processes. The Fenton process achieved removal efficiency of 73.5% for COD, 94.5% for CI, 84% for UV₂₅₄ and 81% for UV₂₈₀. The efficiencies obtained in the Fered-Fenton process were 87% for COD, 97.5% for CI, 94.5% for UV₂₅₄ and 89% for UV₂₈₀ under optimum conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>The results indicate that the modified Fenton process may be a more successful alternative method, notably owing to its enhanced removal efficiencies for organic matter. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2187-2199"},"PeriodicalIF":2.4,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vanadium removal and recovery from aqueous solution with repeated use of a KOH-modified seaweed biochar adsorbent: characterisation and removal mechanisms","authors":"Bashir M Ghanim,&nbsp;Ronan Courtney,&nbsp;J Tony Pembroke,&nbsp;James J Leahy,&nbsp;Thomas F O'Dwyer,&nbsp;John G Murnane","doi":"10.1002/jctb.70015","DOIUrl":"10.1002/jctb.70015","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Vanadium (V) is a critical raw material which is extensively used in metallurgical, aerospace and chemical industries. However, V-enriched wastewaters pose risks to human and environmental health due to their tendency to persist and bioaccumulate. Active V treatment processes generate significant quantities of byproducts with associated high operating costs and there is a need therefore to investigate novel passive technologies such as biosorption. This study investigates the capacity and reusability of KOH-modified seaweed biochar (BC_KOH) to (re-)adsorb, desorb and recover V, and evaluates the influences of initial V concentration, contact time, solution temperature and pH.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The maximum uptake of 48.8 mg V g⁻¹ BC_KOH occurred within 75 min and followed an exothermic adsorption process best described by the Langmuir isotherm model. The magnitude of enthalpy change suggested a physisorption binding interaction with optimum uptake in the range pH 3.5–4.5. Introduction of a saline content (100–400 mg Na⁺ L⁻¹) into the adsorption solution resulted in a modest reduction in the V adsorption level by BC_KOH but further increases in saline concentration thereafter had only limited impact. Successive V(V) adsorption/desorption cycles indicated that V(V) binding to BC_KOH displays effective reversibility with the adsorbent material demonstrating good regeneration characteristics.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>BC_KOH offers clear potential to be used as a cost-effective passive and robust adsorbent of V within a range of acidic industrial waste streams. The capacity of the biochar to desorb and re-adsorb demonstrates high V recovery potential and excellent biochar regeneration capability. © 2025 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; Sons Ltd on behalf of Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2039-2052"},"PeriodicalIF":2.4,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Continuous stirred tank reactor with recycled iron mixer for Fe(II)/chlorine-driven textile dyes oxidation: toward a sustainable continuous-flow process for micropollutants degradation","authors":"Slimane Merouani,&nbsp;Abdelkader Sigha,&nbsp;Hasan A. M. Hussein,&nbsp;Sadi M. Y. Almajdalawi","doi":"10.1002/jctb.70031","DOIUrl":"10.1002/jctb.70031","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study presents a novel and sustainable continuous-flow process for micropollutants degradation, using a lab-scale continuous stirred tank reactor (CSTR) equipped with a recycled iron mixer to drive Fe(II)/chlorine-induced oxidation. The recycled iron rod functions both as a mechanical stirrer and an in-situ source of Fe(II). The system's performance was evaluated by studding parameters such as chlorine flow rate (40–300 μL/s), submerged rod length (1–8 cm), rotation speed (0–500 rpm), dye concentration (5–40 mg/L), and pH (3–6).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULT</h3>\u0000 \u0000 <p>Maximum dye removal of 74% was achieved at pH 3, with higher chlorine flow rates, longer submerged rod length, and faster rotation speeds for an inlet dye concentration of 20 mg/L, while the reaction residence time did not exceed 45 s. Over 90% dye removal was observed at low concentrations (5 mg/L), and optimal performance occurred under acidic pH conditions. Higher pH values inhibited iron corrosion, quenching Fe(II) release and nullifying degradation. The matrix effect showed minimal impact with mineral water, while river and seawater reduced efficiency. Scavenger tests indicated ferryl species (Fe(IV)) as primary oxidant, while hydroxyl and chlorine radicals contributing less (10–20%). A comparison with a conventional Fe(II)/chlorine process showed that while the pre-dissolved Fe(II) system achieved higher conversion rates, the recycled iron system offered greater sustainability and operational simplicity through continuous Fe(II) generation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This process provides a cost-effective, environmentally friendly, and efficient solution for micropollutant degradation in water matrices with light mineral and organic charges. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2176-2186"},"PeriodicalIF":2.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An appraisal on various hydrogen productions and their CO2 emissions – a comparison on the Grey, blue and green pathways","authors":"Stephen Truslove,&nbsp;Elliott L. Bruce,&nbsp;Humphrey H. P. Yiu","doi":"10.1002/jctb.70029","DOIUrl":"10.1002/jctb.70029","url":null,"abstract":"<p>The transition to a net-zero economy requires revolutionary change to the fundamentals of economies around the world. The need to decarbonise processes affects almost every aspect of industry and society, with energy, transport, and manufacturing making up some of the most polluting sectors. Many complementary solutions must be realised to surmount such challenges, and one suggestion is the greater use of hydrogen as a fuel or feedstock. For this to occur, hydrogen production must be significantly scaled up without introducing so many emissions as to counteract improvements made downstream. Although hydrogen gas can be found in underground deposits, almost all hydrogen is produced industrially from fossil fuels, notably <i>via</i> steam reforming process (grey hydrogen), which is usually associated with a considerable carbon footprint. Alternative production pathways with a lower carbon footprint have been developed for large-scale production. This perspective examines the impact of large-scale grey, blue, and green hydrogen production methods and their viability as sources of a cleaner fuel for heat and electricity generation. © 2025 Society of Chemical Industry (SCI).</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 9","pages":"1753-1761"},"PeriodicalIF":2.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced downstream process design for recovery of 2-phenylethanol and 2-phenylethyl acetate after biotransformation","authors":"Tamara Janković,&nbsp;Adrie JJ Straathof,&nbsp;Anton A Kiss","doi":"10.1002/jctb.70027","DOIUrl":"10.1002/jctb.70027","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>2-Phenylethanol (2-PE) and 2-phenylethyl acetate (2-PEAc) are valuable aroma compounds with growing market demands. As an alternative to conventional petrochemical production, more valuable natural forms of these chemicals can be obtained by biotransformation. Low product concentrations, resulting from significant product toxicity to microorganisms, and high boiling points of products complicate recovery process. <i>In situ</i> product recovery by liquid–liquid extraction can be used to increase bioprocess yield and productivity. However, the subsequent purification of 2-PE and 2-PEAc is challenging as a consequence of the multiple phases, high-boiling temperatures of main products, occurrence of remaining substrate and byproducts, and presence of microorganisms.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The main goal of this original work is to improve the competitiveness of the biotechnological production of 2-PE by using <i>in silico</i> methods to develop an advanced industrial process for the final purification after centrifugation. An adaptable dividing-wall column was designed to remove 2-PE with 2-PEAc from organic phase or to esterify 2-PE to pure 2-PEAc. The production flexibility of the developed process allows adjustability to market demand. Additionally, recovery of co-produced ethanol from aqueous phase can increase the economic and environmental performance of the developed process. As confirmed by detailed techno-economic analysis, the proposed processes can cost-effectively (total recovery costs of 0.64–0.72 US$/kg_2-PE/2-PEAc) and energy-efficiently (primary energy requirements of 1.83–2.05 kW_thh/kg_2-PE/2-PEAc) recovery of 2-PE or 2-PEAc after biotransformation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The developed process enhances economic and environmental viability of biotechnological 2-PE production by reducing costs and energy requirements, while ensuring flexibility to adapt to market demands. © 2025 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; Sons Ltd on behalf of Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 10","pages":"2019-2028"},"PeriodicalIF":2.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}