FUEL
·
2023
·
IF 7.4
Mengxia Qing,Wenbin Liu,Liang Liu,Sibiao Huang,Zihang He,Yanshan Yin,Jun Xiang
Enhancing biochar's adsorption and solidification performance in compound-polluted aqueous solutions remains a crucial task for achieving the cost-effective removal of heavy metals from water bodies. The study examined the removal performances and mechanisms of Cu(II) and Cr(III) using biochar prepared from food waste at temperatures of 350 °C, 450 °C, and 550 °C (FWB-350, FWB-450, and FWB-550). FWB-450 exhibited the highest overall effectiveness in adsorbing Cu(II) and Cr(III), demonstrating the adsorption capacity (Q e ) of 40.283 and 21.456 mg/g in single-solution, respectively. Thermodynamic parameters indicate that the adsorption process involves physical and chemical reactions involving heat absorption. The impact of Cr(III) on the adsorption of Cu(II) is more apparent in the mixed competitive system. The pH, the oxygen-functional groups and carbonate ion quantity of FWB are crucial in improving Cu(II) and Cr(III) adsorption by affect the hydrolysis, complexation, and ion exchange processes. The presence of alkaline earth metal ions in FWB, like Ca(II), aids in the elimination of Cu(II) and Cr(III) through ionic precipitation and ion exchange, correspondingly. Furthermore, FWB adsorbed with Cu(II) and Cr(III) is relatively less hazardous than solid waste. The study validates the resource utilization of FW and its potential application of biochar in heavy metal adsorption.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
WASTE MANAGEMENT
·
2022
·
IF 8.816
Lanting Wang,Zhongfang Lei,Zhenya Zhang,Kazuya Shimizu,Tian Yuan,Shengnan Li,Siting Liu
Fe 3 O 4 supplementation has been reported as a high-efficient approach to enhance biogas production in anaerobic digestion (AD). Volatile fatty acids (VFAs), especially acetic acid (HAc), are considered as important products in acidification process of AD. However, the possible mechanisms involved in promotion effect of Fe 3 O 4 on HAc production in hydrolysis and acidification processes of AD have not been comprehensively studied. This study first investigated the promotion effect of Fe 3 O 4 on hydrolysis, acidogenesis and acetogenesis stages of AD and proposed the underlying mechanisms, using food waste (FW) as the feedstock, which is considered as the most suitable substrate for VFAs production. Results indicated that the HAc production (77.38 g-C/kg-VS) was enhanced by 79 % in AD of FW with addition of 10 g/L Fe 3 O 4 . The duration to reach the maximum HAc production was also shortened from 14 days to 10 days. The AD tests using model substrates revealed that Fe 3 O 4 enhanced hydrolysis, acidogenesis, and degradation of propionic acid, thus resulting in enhanced HAc production. The enhanced activities of hydrolytic and acid-forming enzymes, and electron transport system (ETS) with Fe 3 O 4 addition further demonstrated its function as an electron acceptor to stimulate electron transfer and accelerate microbial metabolisms in AD, which contributed to the enhanced HAc production from FW.
研究领域:
环境生物学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
Energy Reports
·
2020
·
IF 3.595
Mingxing Zhao,Ziyi Liu,Jin Xu,He Liu,Xiaohu Dai,Sai Gu,Wenquan Ruan
The effect of nano zero valent iron (NZVI) on hydrogen production by the co-digestion of dry lake algae and food waste was investigated. The results showed that 10 mg.gTS −1 addition of NZVI improved the performance of the co-digestion system, with the cumulative hydrogen increased by 29.20% to 40.04 mL.gVS −1 , compared to that of the control. However, the cumulative hydrogen yield decreased to 14.77 and 5.37 mL.gVS −1 when the NZVI dosage was increased to 20 and 40 mg.gTS −1 , respectively. The oxidation reduction potential (ORP) of the reaction system was decreased dramatically to -331 ∼ -490 mV at the initial reaction stage. The degradation rates of carbohydrate and protein also reached their peaks at the NZVI dosage of 10 mg.gTS −1 . The concentration of end product in the liquid phase and the dehydrogenase activity was first increased then decreased when enhancing the NZVI dosage. Analysis of the transmission electron microscopy images revealed that excessive NZVI dosage could destroy the cells of microorganisms.
研究领域:
环境生物学
·
微生物学
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Lanting Wang,Tianxiao Liu,Jing Xu,Zhiwei Wang,Zhongfang Lei,Kazuya Shimizu,Zhenya Zhang,Tian Yuan
Fe 3 O 4 addition in anaerobic fermentation of food waste (FW) is promising for enhancing volatile fatty acids (VFAs) production. However, the large amount of Fe 3 O 4 in the digestate fertilizer leads to the waste of resources and possible toxicity to organisms. Thus, this study investigated the feasibility of Fe 3 O 4 recycling for VFAs enhancement in anaerobic fermentation of FW and performed the cost-benefit evaluation of this process. Results revealed that Fe 3 O 4 could be successfully recycled twice with recovery rates of 71.5% and 65.5%, respectively. X-ray diffraction analysis revealed a slight change to the Fe 2 O 3 -like structure after 2-time recycling. The VFAs yields were enhanced by 17.2% and 17.0% in Cycles 1 and 2 owing to the enhanced activities of hydrolytic and acid-forming enzymes. The net income of the Fe 3 O 4 recycling process was about 13-fold higher than that of the conventional treatment process, suggesting a promising and economically feasible strategy for enhancing VFAs production.
研究领域:
环境科学
·
生物工程
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产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Zhihui Ling,Shang Wang,Zhongzhan Leng,Chengmei Li,Wenhui Zhang,Xinxin Kang,Xianghui Qi,Cunsheng Zhang
To improve the performance of ethanol production from food waste, a consolidation process involving both the addition of surfactant and cell immobilization was investigated. Results showed that the optimum glucose concentration was 200 g/L for ethanol fermentation using Saccharomyces cerevisiae as inoculum. With the addition of 0.5% Tween 80, the ethanol production was improved from 68.1 to 79.8 g/L, which was attributed to the increased mass transfer of cells provoked by Tween 80. In a cell-immobilized system, wheat straw was used as the matrix to carry the cells. A high ethanol production of 87.8 g/L was obtained with the sequential fermentation mode due to the high cell density on the cell carrier. The results of a mass balance calculation revealed that the ethanol production of food waste achieved 340.4 kg/t (on a dry basis), which provided an insight that food waste was a suitable substrate for ethanol production. The main cost was spent on energy consumption in the processes of food waste sterilization, hydrolysis, fermentation, and ethanol distillation, and measures for reducing the energy were suggested to improve the economic performance of ethanol production.
研究领域:
生物技术
·
环境科学
·
发酵工程
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Xu Duan,Haowen Duan,Chunxia Zhao,Leiyu Feng,Guohua Zhao,Yinguang Chen
Fatty acids (FAs)-involving structures, widely occurring in production and life, have been increasingly considered as major feedstocks and potential platforms for renewable energy generation. However, the role of isomeric FAs (particularly trans-FAs) in high-concerned energy-reserving technology represented by anaerobic digestion (AD) remains unclear. This study displayed that trans-oleic acid (TOA, 10 mg/L) significantly increased methane production by 56% during the codigestion of food waste and sludge, whereas the same concentration of cis-oleic acid (COA) led to a slight 20% increase. Genome-centric meta-omics and biochemical tests indicated that acidogenic taxa that harbor and express distinct functions in the cell envelopes were primarily responsible for TOA/COA-differentiated AD. Four shared taxa, including three monodermal acidogens and one hydrogenotrophic methanogen, were common drivers of both TOA- and COA-enhanced AD, resulting in stronger acidification and hydrogenotrophic methanogenesis than in the control bioreactor without oleic acid. In addition to four shared species, two unique didermal acidogens were specific drivers of TOA-enhanced AD, demonstrating more robust acidification compared to that of COA-enhanced AD. This study profiled the geometry-dependent effects of isomeric FAs on AD, providing new insights into targeted regulation for energy conservation and decarbonization of FAs-involving feedstocks.
研究领域:
环境微生物学
·
生物能源
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产品关联
DOI
PubMed
高影响因子
Sustainability
·
2024
·Vol. 16
·期 10
·4231
·
IF 3.3
Ke Ren,Fangjie Ding,Lijun Zhang,Fengping Peng,Jianzhong Guo,Chunzheng Wu
The food industry is responsible for generating considerable amounts of waste, such as excess fruits and leftover sugars, which contribute to resource depletion and pose environmental challenges. This research delves into the application of gold-modified graphitic carbon nitride nanosheets (Au/CN) as a potent catalyst for the transformation of these food wastes into H2via piezoelectric reforming during sonication. Au/CN demonstrated a superior rate of H2evolution compared to pristine g-C3N4(i.e., 1533.3 vs. 364.9 µmol/g/h) and it maintained its efficiency through multiple cycles of use. The catalytic activity was found to be optimal at a neutral pH level and with increased sugar concentrations. The enhanced catalytic performance of Au/CN was ascribed to the efficient segregation of charge carriers as well as the reduced charge transfer distance. This study underscores the viability of using Au/CN as a means for converting food wastes into a sustainable source of H2energy.
研究领域:
环境科学
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Ruonan Wang,Naif Abdullah Al-Dhabi,Yufeng Jiang,Xiaofeng Dai,Rui Li,Wangwang Tang,Rongbo Guo,Shanfei Fu
Food waste (FW) is prone to accumulate volatile fatty acids (VFAs) during anaerobic digestion (AD). In this study, nano zero-valent iron (nZVI) was used to enhance AD system stability and improve methane production efficiency. Results showed that nZVI facilitated the AD obviously. The highest cumulative methane production of 195.63 ± 5.38 mL/g VS was obtained at the nZVI dosage of 1.0 g/L, which was 22.6 % higher than that of the control. The appropriate addition of nZVI mainly strengthened the methanogenic stage of AD of FW, reduced the accumulation of VFAs and alleviated the pH fluctuation of the system. The corrosion hydrogen production efficiency of nZVI during AD first increased and then decreased with the increase of nZVI addition. Microbial community analysis demonstrated that the addition of nZVI mainly increased the abundance of hydrotropic methanogens and DIET-associated methanogens, and promoted the growth of bacteria in a symbiotic relationship with methanogens. In summary, the nZVI addition supplied a promising approach to improve the methane production efficiency from AD of FW.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Jingyu Zhang,Zhihui Zhang,Liping Yao,Mingrong Qian,Zuguang Li,Yulin Han,Shanshan Bai,Mawrong Lee
The existing QuEChERS-combined analytical pretreatment methods are limited by large reagent consumption, high environmental burden, and mediocre effects. To provide an efficient and green pretreatment method, this study developed pH-responsive switchable deep eutectic solvents (SDESs) to extract triazole fungicides (TFs) from fruit peel wastes, which could enhance the preconcentration effect of target compounds in food waste samples with complex matrices. The mechanisms of pH-induced phase transition and hydrophobicity-hydrophilicity conversion of pH-responsive SDESs were investigated by pH phase diagrams and chemical characterization techniques, respectively. We validated the established method by high-performance liquid chromatography-diode array detector (HPLC-DAD), and lower LOD (0.089–0.351 ng mL −1 ), LOQ (0.297–1.172 ng mL −1 ), RSD (≤8.8 %) and satisfactory recoveries (90.6 %-110.9 %) and preconcentration factors (389–512) were obtained in rotting grape peel, watermelon peel, and orange peel samples. Our findings highlight the potential of pH-responsive SDESs in the extraction and analysis of various natural food products.
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RESOURCES CONSERVATION AND RECYCLING
·
2024
·
IF 11.2
Weizhong Huo,Tong Hu,Yuchao Shao,Rong Ye,Ajmal Muhammad,Wenjing Lu
In this study, the role of inorganic carbon in chain elongation fermentation was investigated by examining its effects at different carbonate concentrations. The results demonstrated that higher yield of caproate (6.3±0.3 g/L - 7.4±0.2 g/L) was achieved with a NaHCO 3 concentration of 2.5-5.0 g/L. Building upon these findings, a chain elongation process for food waste was developed. The caproate productions of control, CO 2 and Na 2 CO 3 trials were 4.6±0.2 g/L, 7.3±0.1 g/L, and 8.3±0.2 g/L, respectively. Chain elongation fermentation of food waste (1t TS) with Na 2 CO 3 enhancement could synthesize 116.9 kg of caproate and 72.5 kg of carbon could be converted in caproate, accounting for 15.5% of the total organic carbon in the food waste. This study provided a comprehensive exploration of the chain elongation process for food waste, offering insights for further optimization and enhancement of food waste chain elongation performance coupling inorganic carbon utilization.
研究领域:
环境工程
·
生物技术
·
废物管理
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 150
·期 5
·1373-1388
·
IF 2.372
Ji Qinghua,Yu Xiaojie,Yagoub Abu El-Gasim A.,Li Mo,Fakayode Olugbenga Abiola,Yan Dong,Zhou Cunshan,Chen Li
Abstract The purpose of this study was to efficiently convert the sugary food waste (SFW) to 5-hydroxymethylfurfural (5-HMF) by ultrasound-[Bmim]Cl pretreatment in ionic liquids (ILs)-ion exchange resin system. The effect of ultrasonic pretreatment on SFW and the effect of ultrasonic frequency, ILs, acid resin and catalyst load on SFW conversion were studied. The kinetic curve and the relationship between products and intermediates were studied. In addition, the structure of SFW was also studied by FT-IR and SEM. The results indicated ultrasound-[Bmim]Cl pretreatment can significantly promote the dissolution of cellulose in SFW, and the optimal ultrasonic frequency, solvent and catalyst were 20 + 40 + 60 kHz, [Bmim]Cl and D001-cc resin, respectively; under the best reaction conditions, the maximum 5-HMF yields from the orange and apple wastes were 42.15 and 44.66 mol%, respectively. The kinetic studies showed that the early stage of 100 and 120 °C was mainly the hydrolysis reaction, and late stage was mainly isomerization and dehydration reaction; the early stage of 140 and 160 °C was a rapid hydrolysis and dehydration reaction, and the late stage was mainly the rehydration reaction of 5-HMF. The relationship between the intermediate precursors and 5-HMF showed that the rates of formation and rehydration of 5-HMF increased with the increase in temperature, and the formation reaction was mainly concentrated in zone II. The FT-IR and SEM results of degradation products showed that cellulose in SFW was more easily hydrolyzed at high temperature and long time. Graphic Abstract
研究领域:
化学工程
·
环境科学
·
催化
·
废物管理
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Yongli Liu,Linyan He,Miao Liu,Yi Wang,Lin Li,Li Gu,Jinze Li,Shaowu Liu,Qiang He
This study examined the combination of activated carbon and magnetite with calcium peroxide in enhancing the anaerobic digestion (AD) performance of food waste (FW). The individual mechanisms of these two approaches were also clarified. The results indicated that AC/CaO 2 achieved the highest specific methane yield of 434.4 mL/g VS, followed by Fe 3 O 4 /CaO 2 (416.9 mL/g VS). Both were significantly higher than other groups (control, AC, Fe 3 O 4 , and CaO 2 were 330.1, 341.4, 342.8, and 373.2 mL/g VS, respectively). Additionally, compared to Fe 3 O 4 /CaO 2 , AC/CaO 2 further increased reactive oxygen species (ROS), thereby enhancing the hydrolytic acidification process. Simultaneously, the higher ROS levels of Fe 3 O 4 /CaO 2 and AC/CaO 2 promoted the formation of microbial aggregates and established a more robust enzymatic defense system and unique damage repair strategy. The research comparatively analyzed the synergistic mechanism of iron-based and carbon-based conductive materials with CaO 2 , providing new perspectives for optimizing the AD of FW.
研究领域:
环境工程
·
生物技术
·
废物管理
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）