{"title":"Circular economy approach to valorizing horticultural waste via thermochemical process","authors":"Dohee Kwon , Jee Young Kim , Eilhann E. Kwon","doi":"10.1016/j.psep.2025.107088","DOIUrl":"10.1016/j.psep.2025.107088","url":null,"abstract":"<div><div>Horticultural waste (HORW), a representative form of agricultural biomass, holds promise as a carbon-rich feedstock for the production of value-added materials. This study aimed to maximize carbon utilization from HORW into syngas and carbon-based biosolid through thermochemical conversion, contributing to a circular economy. To improve syngas production, CO<sub>2</sub> was introduced during the pyrolysis. In conventional pyrolysis, additional CO production was observed, attributed to a homogenous reaction between CO<sub>2</sub> and VOCs derived from HORW. To further promote this reaction, an in-line pyrolysis setup was applied, which facilitated thermal cracking of VOCs and led to a 1.7-fold increase in syngas yield compared to the conventional pyrolysis, but did not significantly enhance CO<sub>2</sub> reactivity. In contrast, the presence of Ni-based catalyst effectively activated the CO<sub>2</sub>-induced homogenous reaction, resulting in a 3.4-fold higher syngas yield than conventional pyrolysis. Moreover, CO<sub>2</sub>-assisted pyrolysis modified the physicochemical properties of the biosolid, yielded a biosolid with enhanced specific surface area and cation exchange capacity compared to the inert condition. These enhancements contributed to superior soil amendment potential. Overall, the use of CO<sub>2</sub> in the thermochemical conversion of HORW could be a promising pathway for valorizing waste, aligned with circular economic principles.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107088"},"PeriodicalIF":6.9,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wenzhi Zhou , Haiyan Wang , Zhibiao Chen , Peng Xiu , Honghai Yan , Zuliang Chen
{"title":"Comparative analysis on the effects of soil and Dicranopteris pedata taking MgSO4 and (NH4)2SO4 as leaching agents","authors":"Wenzhi Zhou , Haiyan Wang , Zhibiao Chen , Peng Xiu , Honghai Yan , Zuliang Chen","doi":"10.1016/j.psep.2025.107085","DOIUrl":"10.1016/j.psep.2025.107085","url":null,"abstract":"<div><div>In-situ leaching of ion-adsorbed rare earth ores (IAREO) is generally considered to have adverse impacts on the mine environment. However, studies on the effects of MgSO<sub>4</sub> and (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> as leaching agents on the surface environment of IAREO are scarce. In this study, MgSO<sub>4</sub> and (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> were selected as leaching agents for extracting rare earth elements (REE) in two IAREO mines, respectively. The collected samples from the mining area before leaching, and 1, 3, and 6 months after leaching four times to investigate the environmental impact during the process. The soil pH value decreased significantly, by 6.90 %, after 6 months of leaching with (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>. Additionally, total nitrogen (TN) and NH<sub>4</sub><sup>+</sup>-N contents decreased under MgSO<sub>4</sub> leaching at the mine, while NH<sub>4</sub><sup>+</sup>-N decreased and NO<sub>3</sub><sup>-</sup>-N increased at the mine under the leaching of (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>. Consequently, the increase in NO<sub>3</sub><sup>-</sup>-N significantly influenced REE enrichment in the aboveground organs of <em>Dicranopteris pedata</em> (<em>D. pedata</em>). After leaching for 3 months, the leaves REE content, bioconcentration factor (BF), and translocation factor (TF) of <em>D. pedata</em> reached the maximum. Meanwhile, the exchangeable and residual REE that can affect REE enrichment in <em>D. pedata</em> have increased, while the Fe/Mn oxide-bound REE which accounted for the major portion of REE decreased. The results of the study confirmed that the MgSO<sub>4</sub> leaching agent is more environmentally friendly compared to (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> in nitrogen contamination and that <em>D. pedata</em> has the potential to phytoremediate nitrogen and REE pollution in IAREO tailing areas.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107085"},"PeriodicalIF":6.9,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Muhammad Mujahid , Muhammad Ali Hasnain , Ghafoor Ahmad , Chao Wang , Fan Xiao , Zhe Wu , Long-Fei Ren , Jiahui Shao
{"title":"Sustainable water desalination with anti-wetting Janus membranes under simulated industrial low-grade fluctuated heat conditions in DCMD","authors":"Muhammad Mujahid , Muhammad Ali Hasnain , Ghafoor Ahmad , Chao Wang , Fan Xiao , Zhe Wu , Long-Fei Ren , Jiahui Shao","doi":"10.1016/j.psep.2025.107077","DOIUrl":"10.1016/j.psep.2025.107077","url":null,"abstract":"<div><div>Membrane distillation (MD) is a promising technology for desalination and wastewater treatment, but its widespread application is hindered by membrane wetting, particularly when treating hypersaline water with surfactants. This study investigates the performance of Janus polyamide-polyvinylidene fluoride (PA/PVDF) membranes, which are synthesized using reverse interfacial polymerization (RIP) to form a hydrophilic polyamide (PA) layer on a hydrophobic PVDF substrate, combining hydrophilic and hydrophobic properties to address wetting issues in MD. We examined the membrane’s performance under varying feed temperatures (40–60 ℃), mimicking industrial low-grade heat conditions, and in highly saline solutions containing 0.6 M NaCl and 0.4 mM sodium dodecyl sulfate (SDS). The Janus PA/PVDF membrane demonstrated excellent flux stability (up to 27 LMH at 60 ℃) and high salt rejection even under continuous 8-hour operation. Notably, despite the presence of surfactants, the membrane maintained its anti-wetting performance by effectively preventing pore wetting, attributed to the hydrophilic PA layer that retained the SDS molecules and minimized liquid infiltration. These findings highlight the significant advantages of Janus membranes in mitigating temperature-dependent wetting, making them a promising solution for energy-efficient desalination and wastewater reclamation in real-world applications, where fluctuating temperatures and complex feed conditions are common.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107077"},"PeriodicalIF":6.9,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Lanjin Fang , Shuangshuang Wang , Xingbin Sun , Kejing Wang
{"title":"Species-specific bioaccumulation and sensitivity to microplastics in freshwater snails: Insights from Cipangopaludina chinensis and Semisulcospira libertina","authors":"Lanjin Fang , Shuangshuang Wang , Xingbin Sun , Kejing Wang","doi":"10.1016/j.psep.2025.107083","DOIUrl":"10.1016/j.psep.2025.107083","url":null,"abstract":"<div><div>The integration of data on environmental microplastic concentrations, in vivo concentrations within organisms, and organism tolerance is poorly known. This study introduces the tolerance value (TV) and in vivo microplastic concentrations as factors to monitor and analyze the bioaccumulation and toxicity of microplastics. The bioaccumulation of microplastics in wild <em>Cipangopaludina chinensis</em> and <em>Semisulcospira libertina</em> in the Songhua River was investigated. The bioaccumulation and effects on biochemical markers were subsequently examined over a 28-day period. The findings revealed that the concentration of microplastics in <em>C. chinensis</em> (32.37 ± 6.03 items/g) is higher than that in <em>S. libertine</em> (22.81 ± 12.72 items/g). Prolonged exposure led to acetylcholinesterase activity inhibition and notable abnormalities in redox and energy metabolism markers. <em>S. libertina</em> exhibited a lower TV (TV=3.1), and greater sensitive to microplastics (sensitivity coefficient=0.73), making it a better indicator organism. In contrast, <em>C. chinensis</em> (TV=5.4) accumulates greater pollutant loads but shows reduced sensitivity (sensitivity coefficient =0.48). This study addresses the gap in understanding the differential bioaccumulation and biological responses to microplastics in freshwater species, providing new insights into species-specific pollutant burdens and sensitivities, and highlighting the advanced use of <em>S. libertina</em> as a novel indicator organism for microplastic pollution assessment.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107083"},"PeriodicalIF":6.9,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
{"title":"Comparative assessment of Batch and semi-dynamic leaching studies for heavy metals release from solid waste base solidified soil","authors":"Jieya Zhang , Zhen Yang , Min Wu , Xiaoqiang Dong","doi":"10.1016/j.psep.2025.107076","DOIUrl":"10.1016/j.psep.2025.107076","url":null,"abstract":"<div><div>This study aims to assess the potential leaching activity of heavy metals from contaminated soil solidified using a combination of industrial wastes (red mud, carbide slag, and phosphogypsum) and cement (RCP). Study on the leachability of solidified high concentration copper (RCP-Cu) and lead (RCP-Pb) contaminated soil under various leaching conditions. The desorption and diffusion behavior of RCP-Pb/Cu in acidic solutions were investigated through updated Batch and semi-dynamic leaching tests. Batch test results show that for leachates at pH of 2 and 3.2, copper/lead concentrations initially decrease but then increase with more leaching cycles. For distilled water leachates, the concentration, conductivity, and pH of the leachate gradually decrease with increasing leaching cycles. Moreover, stronger acidity leads to a smaller desorption distribution constant. Semi-dynamic leaching test reveal that when the leaching solution is weakly acidic (pH≥3.2), the samples exhibit excellent acid buffering, keeping the leachate pH around 12, with heavy metals cumulative leaching rate below 1 %. When the leaching solution is highly acidic (pH≤2), it accelerates the leaching of active ions and the dissolution of hydrated products, significantly increasing the leaching rate of RCP-Cu. As acidity increases, the diffusion coefficient rises, with RCP-Cu showing a higher diffusion coefficient than RCP-Pb. The batch leaching test shows higher leaching rates than the semi-dynamic test, suggesting it is a more conservative method for assessing environmental safety in engineering applications. Therefore, selecting the appropriate leaching evaluation method should be based on the specific project needs and goals.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107076"},"PeriodicalIF":6.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Muhammad Burhan Memon , Ming Tao , Tufail Ahmed , Zheng Yang , Muhammad Ibrahim , Sami Ullah
{"title":"Towards greener metal production: A life cycle assessment model for copper-gold-silver mining and mineral processing operations","authors":"Muhammad Burhan Memon , Ming Tao , Tufail Ahmed , Zheng Yang , Muhammad Ibrahim , Sami Ullah","doi":"10.1016/j.psep.2025.107069","DOIUrl":"10.1016/j.psep.2025.107069","url":null,"abstract":"<div><div>Copper, gold, and silver (CGS) are indispensable non-ferrous metals, widely recognized for their critical roles in various industrial and technological applications. However, the environmental repercussions linked to combined CGS production have been insufficiently explored. This research investigates the ecological impacts of integrated CGS production in the context of developing countries, with Pakistan as a representative case. The environmental impacts of CGS production were assessed using the Life Cycle Assessment (LCA) framework implemented in SimaPro 9.0. Data from the Ecoinvent v3 database supported the analysis, with midpoint and endpoint results, including uncertainty evaluation, derived through the ReCiPe 2016 Midpoint (H) and Endpoint methodologies. The results identified water consumption during processing as the most substantial environmental impact. Group contribution analysis indicated that material consumption heavily affects land use and freshwater eutrophication, while energy consumption notably impacts fossil resource scarcity, ozone depletion, acidification, ecotoxicity, and particulate matter formation. Comparative analysis of co-products revealed that gold concentrate had the greatest impacts, particularly in freshwater and marine ecotoxicity, as well as human toxicity, largely due to tailings and electricity use. Key substances contributing to the environmental burden included diesel, coal, crude oil, heavy fuel oil, electricity, flotation agents, and magnesia chrome bricks. Endpoint damage assessment showed that producing one tonne of bulk concentrate led to 2.15E-02 DALYs of human health damage, 1.27E-04 species. yr of ecosystem damage, and $657.88 in resource depletion. Transitioning from coal to renewable energy significantly reduced environmental impacts across all categories. Technical measures are also recommended to support greener and more sustainable CGS production. The findings of this research are crucial for policymakers and industry stakeholders in Pakistan, as well as for regions facing the challenge of balancing industrial growth with environmental sustainability.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107069"},"PeriodicalIF":6.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Jianfu Man, Xinran Wang, Wenpeng Jia, Yongzheng Tang, Yongrui Pi
{"title":"Enhanced removal of gatifloxacin by Fe3O4@bacteria: Performance and mechanism","authors":"Jianfu Man, Xinran Wang, Wenpeng Jia, Yongzheng Tang, Yongrui Pi","doi":"10.1016/j.psep.2025.107080","DOIUrl":"10.1016/j.psep.2025.107080","url":null,"abstract":"<div><div>A novel magnetic biobased material, synthesized from nano Fe<sub>3</sub>O<sub>4</sub> and degrading-bacteria, was developed for the effective removal of gatifloxacin (GAT). Investigations into various parameters influencing the adsorption process revealed that the optimal adsorption capacity of 56.63 mg/g for GAT was achieved under mildly acidic conditions. Furthermore, the adsorption capacity of GAT increased with temperature, specifically within the range of 20 °C to 30 °C, while a decrease was noted at lower concentrations of NaCl. The adsorption kinetics of GAT onto Fe<sub>3</sub>O<sub>4</sub>@bacteria were best described by the pseudo-second-order (PSO) kinetic model and the Langmuir isotherm model. Thermodynamic evaluations confirmed that the adsorption process was both endothermic and spontaneous. The primary mechanisms driving the adsorption of GAT included pore filling, π-π conjugation, hydrogen bonding, and electrostatic interactions. Therefore, Fe<sub>3</sub>O<sub>4</sub>@bacteria was established as an effective and environmentally sustainable adsorbent for the removal of GAT.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107080"},"PeriodicalIF":6.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhen Liu , Wen Shi , Jiaxuan Gao , Meixuan Zhu , Zhi Su , Yikun Xu , Hongyu Ma , Han Wang , Xiaowen Ding
{"title":"Benefits evaluation of reclaimed water utilization based on the United Nations sustainable development goals","authors":"Zhen Liu , Wen Shi , Jiaxuan Gao , Meixuan Zhu , Zhi Su , Yikun Xu , Hongyu Ma , Han Wang , Xiaowen Ding","doi":"10.1016/j.psep.2025.107079","DOIUrl":"10.1016/j.psep.2025.107079","url":null,"abstract":"<div><div>To promote the sustainable development of reclaimed water utilization, this study focuses on reclaimed water use in Changxing County, Zhejiang Province, China. Based on the United Nations Sustainable Development Goals (SDGs) framework, an evaluation index system for reclaimed water utilization benefits was developed. The Analytic Hierarchy Process (AHP) and Entropy Weight Method (EWM) were used to determine weights, and the Grey Relational Analysis Model was employed to assess the benefits. The results indicate that reclaimed water utilization is closely related to four SDGs (SDG 6, SDG 8, SDG 9, SDG 12) and their eleven specific targets (e.g., SDG 6.3, SDG 6.4, SDG 6.5). The index system includes five criteria and 25 indicators. Between 2015 and 2022, the benefits of reclaimed water utilization in Changxing County have steadily increased, divided into three periods: Initiation Exploration (2015–2016), Steady Improvement (2017–2019), and Good Performance (2020–2022). Indicators requiring the most improvement include Water stress level, Unconventional water use rate in industrial production, and Fiscal input ratio. Improvement suggestions include implementing diversified measures to alleviate water stress, increasing industrial water use rates, and enhancing policy mechanisms to support sustainable water resource management.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107079"},"PeriodicalIF":6.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Jinjiang Duan , Jianhao Song , Cheng Yang , Yuanyuan Feng , Qingping Zou , Ziwei Chen , Gang Cao , Jia Pu , Han Zhang , Yu Xiang , Mengli Chen
{"title":"Biodegradable and traditional microplastics affect sediment DOM: Chemical properties, keystone microbes, functional genes","authors":"Jinjiang Duan , Jianhao Song , Cheng Yang , Yuanyuan Feng , Qingping Zou , Ziwei Chen , Gang Cao , Jia Pu , Han Zhang , Yu Xiang , Mengli Chen","doi":"10.1016/j.psep.2025.107074","DOIUrl":"10.1016/j.psep.2025.107074","url":null,"abstract":"<div><div>Microplastics (MPs) are emerging contaminants and accumulate in river sediments, which pose great threaten to the self-purification capacity of rivers by affecting the fate of dissolved organic matter (DOM). Although the impact of MPs on sediment DOM has already been confirmed, it remains unclear how differences in MP characteristics affect the chemical properties of DOM. Thus, this study selects 2 traditional MPs (polystyrene, PS; polypropylene, PP) and 1 biodegradable MPs (polylactic acid, PLA) to construct microcosm incubation system. We found a 3.17-fold increase in DOM concentrations within biodegradable MPs, while traditional MPs exhibited a marked reduction of 76 %-97 % in DOM humification. FTIR analysis indicated biodegradable MPs enhance degradation of carboxylic acids in DOM. Microbial analysis showed that MPs pollution significantly changed the composition and community of keystone microbes in sediment. Compared to PS (6) and PP (4), PLA (11) enriched more tolerant microbes in sediments and significantly reduced the abundance of functional genes associated with methanotrophy (23 %) and hydrocarbon_degradation (25 %). Our results further revealed that MPs affected DOM fractions by changing the composition and abundance of keystone microbes, thereby increasing the sediment DOM concentration. This study provided a new insight into the ecological risks of MPs in river ecosystems.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107074"},"PeriodicalIF":6.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
{"title":"From waste to wheel: Comparative life cycle assessment of sustainable bio-CNG pathways for Tehran's public transport","authors":"Seyed Mohsen Hosseini , Armin Ardehali , Hossein Yousefi","doi":"10.1016/j.psep.2025.107071","DOIUrl":"10.1016/j.psep.2025.107071","url":null,"abstract":"<div><div>This study evaluates various bio-compressed natural gas (bio-CNG) production pathways from a life cycle perspective to identify the most sustainable scenarios for addressing the CNG shortage in Tehran’s public transport fleet. The energy, cost, and environmental impacts of fossil CNG production were assessed and compared with bio-CNG from anaerobic digestion of bio-waste, manure, used vegetable cooking oil (UVCO), and grass biorefinery. The system boundary includes all significant life cycle inputs, outputs, and emissions, excluding end-of-life impacts. Processes were modeled using the ecoinvent database and analyzed in OpenLCA software, with the functional unit set to 1 kg of CNG. The grass-refinery scenario is the most sustainable, with life-cycle costs and environmental impacts comparable to fossil CNG but lower than anaerobic digestion-derived bio-CNG. Grass-based bio-CNG shows lower impacts on human health but higher impacts on ecosystems. Fossil CNG has a resource damage potential 10.8 times higher and a non-renewable energy demand 10.7 times higher than grass-based bio-CNG, while the production cost of grass-based bio-CNG is only 17 % higher. The UVCO-based scenario ranks second, with lower ecosystem damage but higher human health impacts. Manure-based bio-CNG is more sustainable than bio-waste-based bio-CNG, which has the highest environmental and cost burdens, making it economically non-viable. Future research should address end-of-life impacts, socio-economic factors, and advanced technologies to enhance bio-CNG sustainability.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"197 ","pages":"Article 107071"},"PeriodicalIF":6.9,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}