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Wang T, He J, Xiao T, He J, Fu X, Liu Q. Insight into the mechanism of alkali-thermal pretreatment of food-waste solid residue through fluorescence spectroscopy coupled with parallel factor analysis. CHEMOSPHERE 2024; 366:143414. [PMID: 39341395 DOI: 10.1016/j.chemosphere.2024.143414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Revised: 09/21/2024] [Accepted: 09/24/2024] [Indexed: 10/01/2024]
Abstract
Food-waste solid residue is the remaining solid after food waste treatment, with high yield, high solid content, high protein and fiber content. Effective pretreatment is necessary to improve the efficiency of hydrolysis and acidification for anaerobic digestion of food-waste solid residue. In this study, fluorescence spectroscopy coupled with parallel factor analysis were used to insight into the mechanism of food-waste solid residue during three pretreatments (alkali, thermal and alkali-thermal). Pretreatments increased the solubility of lignocellulosic substrate and destroyed structure of starch, while lignocellulosic analogs were effectively cracked, changing the composition and improving the degradability. Soluble chemical oxygen demand, soluble protein and soluble polysaccharide concentrations were increased by 144.60%, 350.57% and 138.72% after pretreatment under the condition of 120 °C + 2% CaO, respectively. Three-dimensional fluorescence spectra showed the region of maximum fluorescence intensity under alkali-thermal pretreatments, indicating chemical bonds (such as OC-C) were easier broken and the solubility of organic substances were increased. Three main fluorescence components were obtained by parallel factor analysis, which were humic acid-like, lignocellulose-like and protein-like, respectively, while the lignocellulose-like had the maximum Fmax value. The fluorescence intensity of samples under alkali-thermal pretreatment varied in the range from 59.48 × 105 to 13.18 × 106, which was an increase of 174.27%-507.74% over the control (21.68 × 105), indicating that alkali-thermal pretreatment observably accelerated the breaking of chemical bonds, and thus promoted the dissolution of organic matter. This study deeply revealed the mechanism of alkali-thermal pretreatment of food-waste solid residue, which is of great significance for efficient resource utilization of food waste and food-waste solid residue.
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Affiliation(s)
- Tianru Wang
- Low-cost Wastewater Treatment Technology International Sci-Tech Cooperation Base of Sichuan Province, School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Jing He
- Low-cost Wastewater Treatment Technology International Sci-Tech Cooperation Base of Sichuan Province, School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
| | - Tisen Xiao
- Low-cost Wastewater Treatment Technology International Sci-Tech Cooperation Base of Sichuan Province, School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Junwei He
- Low-cost Wastewater Treatment Technology International Sci-Tech Cooperation Base of Sichuan Province, School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Xiangjing Fu
- Low-cost Wastewater Treatment Technology International Sci-Tech Cooperation Base of Sichuan Province, School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Qing Liu
- Mianyang Zhongke Miantou Environmental Service Co., Ltd., Mianyang, 621010, China
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2
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Li Y, Xiao S, Zhang Q, Wang N, Yang Q, Hao J. Development and standardization of spectrophotometric assay for quantification of thermal hydrolysis-origin melanoidins and its implication in antioxidant activity evaluation. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135021. [PMID: 38944987 DOI: 10.1016/j.jhazmat.2024.135021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 06/22/2024] [Accepted: 06/22/2024] [Indexed: 07/02/2024]
Abstract
Melanoidins are brown recalcitrant polymers originating from the thermal hydrolysis pretreatment (THP) of organic solid waste (OSW). Owing to their various formation pathways and complex structures, there is currently no reliable method to quantify melanoidins. In this study, a spectrophotometric method was developed to determine melanoidins concentration in different OSW. Three typical model Maillard reaction systems (glucose-glycine, glucose/fructose-20 amino acids, and dextran-bovine serum albumin) were used to acquire the characteristic peaks and establish standard curves. The results showed that a standard curve using glucose/fructose-20 amino acids model melanoidins at 280 nm was the optimal quantification method, because it had the best correlation with the physicochemical indicators of melanoidins and semi-quantification results calculated by excitation-emission matrix fluorescence. In addition, the applicability of the proposed method was evaluated using multiple real melanoidins samples extracted from thermally pretreated OSW under different THP conditions and food-derived melanoidins as well, demonstrating its validity and advantages. This study is the first to provide a simple, effective, and accurate method for quantifying THP-origin melanoidins from different sources. Remarkably, as a specific and important application scenario, the proposed quantification method was employed to investigate the concentration dependence of melanoidins antioxidation in thermally pretreated OSW.
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Affiliation(s)
- Yingying Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, School of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Siwei Xiao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, School of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Qian Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, School of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Nan Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, School of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Qing Yang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, School of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Jiuxiao Hao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, School of Environmental Science and Engineering, Beijing University of Technology, Beijing 100124, PR China.
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3
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Zou L, Qi Z, Cheng H, Yu B, Li YY, Liu J. Advanced anaerobic digestion of household food waste pretreated by in situ-produced mixed enzymes via solid-state fermentation: Feasibility and application perspectives. ENVIRONMENTAL RESEARCH 2024; 252:119137. [PMID: 38740290 DOI: 10.1016/j.envres.2024.119137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 05/10/2024] [Accepted: 05/11/2024] [Indexed: 05/16/2024]
Abstract
Enzymatic pretreatment is an effective method which can improve the anaerobic digestion (AD) efficiency of household food waste (HFW). As an alternative to expensive commercial enzymes, mixed enzymes (MEs) produced in situ from HFW by solid-state fermentation (SSF) can greatly promote the hydrolysis rate of HFW and achieve advanced anaerobic digestion (AAD) economically sustainable. In this paper, strategies for improving the efficiency of the enzyme-production process and the abundance of MEs are briefly discussed, including SSF, fungal co-cultivation, and stepwise fermentation. The feasibility of using HFW as an applicable substrate for producing MEs (amylase, protease, and lignocellulose-degrading enzymes) and its potential advantages in HFW anaerobic digestion are comprehensively illustrated. Based on the findings, an integrated AAD process of HFW pretreated with MEs produced in situ was proposed to maximise bioenergy recovery. The mass balance results showed that the total volatile solids removal rate could reach 98.56%. Moreover, the net energy output could reach 2168.62 MJ/t HFW, which is 9.79% higher than that without in situ-produced MEs and pretreatment. Finally, perspectives for further study are presented.
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Affiliation(s)
- Lianpei Zou
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai, 200444, China
| | - Zhuoying Qi
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai, 200444, China
| | - Hui Cheng
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai, 200444, China
| | - Bohan Yu
- BioCo Research Group, Department of Green Chemistry and Technology, Ghent University, Ghent, Belgium
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
| | - Jianyong Liu
- School of Environmental and Chemical Engineering, Shanghai University, 333 Nanchen Road, Shanghai, 200444, China.
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4
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Ling Y, Li L, Zhou C, Li Z, Xu J, Shan Q, Hei D, Shi C, Zhang J, Jia W. Mechanism of improving anaerobic fermentation performance of kitchen waste pretreated by ionizing irradiation-part 1: rice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:25287-25298. [PMID: 38468001 DOI: 10.1007/s11356-024-32731-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 02/27/2024] [Indexed: 03/13/2024]
Abstract
Ionizing irradiation, as a new pretreatment method for the anaerobic fermentation of organic pollutants, is featured with fast reaction speed, good treatment effect, no need to add any chemical reagents, and no secondary pollution. This study explores the mechanism of improving anaerobic fermentation performance of rice samples pretreated by cobalt-60 gamma irradiation through the influence on fermentation substrate, acidogenic phase and methanogenic phase. The results reveal that the soluble chemical oxygen demand of the irradiated rice sample at an absorbed dose of 9.6 kGy increases by 12.4 times due to the dissolution of small molecules of fat-soluble organic matter. The yield of biogas in the acidogenic phase increases by 22.2% with a slight increase in hydrogen gas content. The yield of biogas and methane gas content in the methanogenic phase increases by 27.3% and 15%, respectively. Microbial genome analysis, performed with MiSeq high-throughput sequencing and metagenomic methods, suggests the microbial abundance and metabolic functions in the anaerobic fermentation process change significantly as a result of the pretreatment by gamma irradiation.
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Affiliation(s)
- Yongsheng Ling
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215021, China
| | - Lingxi Li
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China
| | - Chao Zhou
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China
| | - Zhen Li
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China
| | - Jiahao Xu
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China
| | - Qing Shan
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China
| | - Daqian Hei
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Chao Shi
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China
| | - Jiandong Zhang
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China
| | - Wenbao Jia
- Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China.
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215021, China.
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5
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Su X, He J, Khan MA, Chang K, Liu Y, Guo G, Li X, Jin F, Kuang M, Gouda S, Huang Q. Potential Application Performance of Hydrochar from Kitchen Waste: Effects of Salt, Oil, Moisture, and pH. TOXICS 2023; 11:679. [PMID: 37624184 PMCID: PMC10459985 DOI: 10.3390/toxics11080679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/30/2023] [Accepted: 07/31/2023] [Indexed: 08/26/2023]
Abstract
The surge in kitchen waste production is causing food-borne disease epidemics and is a public health threat worldwide. Additionally, the effectiveness of conventional treatment approaches may be hampered by KW's high moisture, salt, and oil content. Hydrothermal carbonization (HTC) is a promising new technology to convert waste biomass into environmentally beneficial derivatives. This study used simulated KW to determine the efficacy of hydrothermal derivatives (hydrochar) with different salt and oil content, pH value, and solid-liquid ratio for the removal of cadmium (Cd) from water and identify their high heating value (HHV). The findings revealed that the kitchen waste hydrochar (KWHC) yield decreased with increasing oil content. When the water content in the hydrothermal system increased by 90%, the yield of KWHC decreased by 65.85%. The adsorption capacity of KWHC remained stable at different salinities. The KWHC produced in the acidic environment increases the removal efficiency of KWHC for Cd. The raw material was effectively transformed into a maximum HHV (30.01 MJ/kg). HTC is an effective and secure method for the resource utilization of KW based on the adsorption capacity and combustion characteristic indices of KWHC.
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Affiliation(s)
- Xuesong Su
- School of Ecology & Environment, Hainan University, Haikou 570228, China
| | - Jizu He
- School of Ecology & Environment, Hainan University, Haikou 570228, China
| | | | - Kenlin Chang
- Institute of Environmental Engineering, Department of Public Health, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;
| | - Yin Liu
- School of Ecology & Environment, Hainan University, Haikou 570228, China
| | - Genmao Guo
- School of Ecology & Environment, Hainan University, Haikou 570228, China
| | - Xiaohui Li
- Hainan Inspection and Detection Center for Modern Agriculture, Haikou 570100, China
| | - Fangming Jin
- School of Ecology & Environment, Hainan University, Haikou 570228, China
| | - Meijuan Kuang
- Hainan Pujin Environmental Engineeering, Haikou 570100, China
| | - Shaban Gouda
- Agricultural and Biosystems Engineering Department, Faculty of Agriculture, Benha University, Toukh 13736, Egypt
| | - Qing Huang
- School of Ecology & Environment, Hainan University, Haikou 570228, China
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6
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Vieira Turnell Suruagy M, Ross AB, Babatunde A. Influence of microwave temperature and power on the biomethanation of food waste under mesophilic anaerobic conditions. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 341:117900. [PMID: 37150174 DOI: 10.1016/j.jenvman.2023.117900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 03/27/2023] [Accepted: 04/07/2023] [Indexed: 05/09/2023]
Abstract
Food waste is an attractive feedstock for Anaerobic Digestion due to its high biodegradability and moisture content. Nevertheless, due to its complex structure and composition, methane yield is typically compromised with 50-60% of the theoretical maximum obtained. The well-known limitation of the hydrolysis step can be circumvented by adopting feedstock pre-treatments, such as microwave irradiation. It improves solubilization of various FW components making them more readily available for the microorganisms and reducing AD process duration. In this work different heating rates (7.8, 3.9 and 1.9 °C/min) and temperatures (85, 115, 145, 175 °C) were applied when pre-treating food waste as a substrate for AD. Increase in the solubilization of organic matter in the form of Soluble Chemical Oxygen Demand was the most significative change in FW characteristics after pre-treatment, with final temperature of 175 °C and heating rate of 3.9 °C showing a 73.19% increment. Nevertheless, process performance of AD of MW FW was optimum at 85 °C 7.8 ramp, showing no intermediate products accumulation, up to 77% more methane produced in the first week of digestion compared to the other conditions tested and reduction of 96.36% on the lag phase duration, compared to the control. On the other hand, samples treated at 175 °C, regardless of heating rate, consistently showed poor process performance, with low methane yield, possibly due to the formation of hard-to-digest compounds. This work underlines the importance of adjusting microwave temperature and power when pre-treating FW for biomethane production so the process is optimized.
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Affiliation(s)
- Mariana Vieira Turnell Suruagy
- BioResource Systems Research Group, School of Civil Engineering, University of Leeds, Leeds, LS2 9JT, West Yorkshire, United Kingdom.
| | - Andrew Barry Ross
- School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Akintunde Babatunde
- School of Civil Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom
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7
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Devos P, Filali A, Grau P, Gillot S. Sidestream characteristics in water resource recovery facilities: A critical review. WATER RESEARCH 2023; 232:119620. [PMID: 36780748 DOI: 10.1016/j.watres.2023.119620] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 12/12/2022] [Accepted: 01/15/2023] [Indexed: 06/18/2023]
Abstract
This review compiles information on sidestream characteristics that result from anaerobic digestion dewatering (conventional and preceded by a thermal hydrolysis process), biological and primary sludge thickening. The objective is to define a range of concentrations for the different characteristics found in literature and to confront them with the optimal operating conditions of sidestream processes for nutrient treatment or recovery. Each characteristic of sidestream (TSS, VSS, COD, N, P, Al3+, Ca2+, Cl-, Fe2+/3+, Mg2+, K+, Na+, SO42-, heavy metals, micro-pollutants and pathogens) is discussed according to the water resource recovery facility configuration, wastewater characteristics and implications for the recovery of nitrogen and phosphorus based on current published knowledge on the processes implemented at full-scale. The thorough analysis of sidestream characteristics shows that anaerobic digestion sidestreams have the highest ammonium content compared to biological and primary sludge sidestreams. Phosphate content in anaerobic digestion sidestreams depends on the type of applied phosphorus treatment but is also highly dependent on precipitation reactions within the digester. Thermal Hydrolysis Process (THP) mainly impacts COD, N and alkalinity content in anaerobic digestion sidestreams. Surprisingly, the concentration of phosphate is not higher compared to conventional anaerobic digestion, thus offering more attractive recovery possibilities upstream of the digester rather than in sidestreams. All sidestream processes investigated in the present study (struvite, partial nitrification/anammox, ammonia stripping, membranes, bioelectrochemical system, electrodialysis, ion exchange system and algae production) suffer from residual TSS in sidestreams. Above a certain threshold, residual COD and ions can also deteriorate the performance of the process or the purity of the final nutrient-based product. This article also provides a list of characteristics to measure to help in the choice of a specific process.
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Affiliation(s)
| | - Ahlem Filali
- Université Paris-Saclay, INRAE, UR PROSE, F-92761, Antony, France
| | - Paloma Grau
- Ceit and Tecnun, Manuel de Lardizabal 15, 20018, San Sebastian, Spain
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Su J, Lv W, Ren L, Kong X, Luo L, Awasthi MK, Yan B. Effect of water regime on the dynamics of free ammonia during high solid anaerobic digestion of pig manure. CHEMOSPHERE 2023; 312:137328. [PMID: 36410500 DOI: 10.1016/j.chemosphere.2022.137328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/13/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
Free ammonia (FAN) inhibition is commonly encountered during high solid anaerobic digestion (HSAD) of pig manure. The performance of HSAD is highly related to its operational water regime; however, little information is available regarding the dynamics of free ammonia with varied water regimes. In this work, four treatments were set with equal amount of water supply but varied addition frequencies, i.e. add once but at different times in treatments T1 and T2, add twice in T3 while it was three times in treatment T4. Results showed that the whole methanogenic process ran smoothly with the average methane gas production rate maintaining at 191.1 LCH4/kgVSadded. Although a higher methane gas production rate of 217.4 LCH4/kgVSadded was achieved in T1, one time water addition triggered a higher ammonia inhibition potential. Cumulative FAN release was 6.03 mgFAN/kgVSadded in T1 while the balance between FAN and ammonia tended to the fraction of FAN. In T4, cumulative FAN of 5.07 mgFAN/kgVSadded was evolved, which was lower than that in T1 but similar to the situation in T2. The lowest FAN was observed in T3, indicating that a moderate frequency of dilution might be conducive to alleviate free ammonia inhibition.
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Affiliation(s)
- Jian Su
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Wenjuan Lv
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Liheng Ren
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Xiaoliang Kong
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Lin Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province, 712100, China.
| | - Binghua Yan
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
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9
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The effect of thermochemical pretreatment on anaerobic digestion efficiency of municipal solid waste under mesophilic conditions. SCIENTIFIC AFRICAN 2022. [DOI: 10.1016/j.sciaf.2022.e01198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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10
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Cazaudehore G, Guyoneaud R, Vasmara C, Greuet P, Gastaldi E, Marchetti R, Leonardi F, Turon R, Monlau F. Impact of mechanical and thermo-chemical pretreatments to enhance anaerobic digestion of poly(lactic acid). CHEMOSPHERE 2022; 297:133986. [PMID: 35176299 DOI: 10.1016/j.chemosphere.2022.133986] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 02/06/2022] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
To date, the introduction of biodegradable plastics such as PLA in anaerobic digestion systems has been limited by a very low rate of biodegradation. To overcome these limitations, pretreatment technologies can be applied. In this study, the impact of pretreatments (mechanical, thermal, thermo-acid, and thermo-alkaline) was investigated. Mechanical pretreatment of PLA improved its biodegradation rate but did not affect the ultimate methane potential (430-461 NL CH4 kg-1 VS). In parallel, thermal and thermo-acid pretreatments exhibited a similar trend for PLA solubilization. Both of these pretreatments only achieved substantial solubilization (>60%) at higher temperatures (120 and 150 °C). At lower temperatures (70 and 90 °C), negligible solubilization (between 1 and 6%) occurred after 48 h. By contrast, coupling of thermal and alkaline pretreatment significantly increased solubilization at the lower temperatures (70 and 90 °C). In terms of biodegradation, thermo-alkaline pretreatment (with 5% w/v Ca(OH)2) of PLA resulted in a similar methane potential (from 325 to 390 NL CH4 kg-1 VS) for 1 h at 150 °C, 6 h at 120 °C, 24 h at 90 °C, and 48 h at 70 °C. Reduction of the Ca(OH)2 concentration (from 5% to 0.5% w/v) highlighted that a concentration of 2.5% w/v was sufficient to achieve a substantial level of biodegradation. Pretreatment at 70 and 90 °C using 2.5% w/v Ca(OH)2 for 48 h resulted in biodegradation yields of 73% and 68%, respectively. Finally, a good correlation (R2 = 0.90) was found between the PLA solubilization and its biodegradation.
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Affiliation(s)
- G Cazaudehore
- APESA, Pôle Valorisation, Cap Ecologia, 64230, Lescar, France; Université de Pau et des Pays de L'Adour / E2S UPPA / CNRS, IPREM UMR5254, Institut des Sciences Analytiques et de Physicochimie pour L'Environnement et Les Matériaux, Chimie et Microbiologie de L'Environnement, 64000, Pau, France
| | - R Guyoneaud
- Université de Pau et des Pays de L'Adour / E2S UPPA / CNRS, IPREM UMR5254, Institut des Sciences Analytiques et de Physicochimie pour L'Environnement et Les Matériaux, Chimie et Microbiologie de L'Environnement, 64000, Pau, France
| | - C Vasmara
- CREA-Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture, Via Beccastecca 345, 41018, San Cesario Sul Panaro, Italy
| | - P Greuet
- INRAE, Univ Montpellier, IATE, Montpellier, France
| | - E Gastaldi
- INRAE, Univ Montpellier, IATE, Montpellier, France
| | - R Marchetti
- CREA-Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture, Via Beccastecca 345, 41018, San Cesario Sul Panaro, Italy
| | - F Leonardi
- Université de Pau et des Pays de L'Adour / E2S UPPA / CNRS, IPREM UMR5254, Institut des Sciences Analytiques et de Physicochimie pour L'Environnement et Les Matériaux, Chimie et Microbiologie de L'Environnement, 64000, Pau, France
| | - R Turon
- APESA, Pôle Valorisation, Cap Ecologia, 64230, Lescar, France
| | - F Monlau
- APESA, Pôle Valorisation, Cap Ecologia, 64230, Lescar, France.
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11
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Xie T, Zhang Z, Sun M, Lv M, Li D, Nan J, Feng Y. Effect of hydrothermal pretreatment on the degrease performance and liquid substances transformation of kitchen waste. ENVIRONMENTAL RESEARCH 2022; 205:112537. [PMID: 34906588 DOI: 10.1016/j.envres.2021.112537] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 12/01/2021] [Accepted: 12/05/2021] [Indexed: 06/14/2023]
Abstract
Hydrothermal treatment (HT) is a pragmatic approach for pretreatment of kitchen waste (KW). This work investigated the effect of hydrothermal pretreatment (HTP) on the deoiling, desalting and liquid substances transformation of KW. The orthogonal test method was used to study the effects of three factors at five levels, including solid to liquid ratio (A1-5), heating time (B1-5) and hydrothermal temperature (C1-5). The results indicated that the floatable oil content was improved significantly after HTP. The highest floatable oil content was 84.54 mL/kg at the hydrothermal condition of 1/1.5, 20 min and 100 °C, which was 2.42 times higher than the control. The maximum desalination ratio (92.66%) was at A5B1C5 (1/2.5, 5 min, 100 °C), which was 4.48 times higher than control group (No.0) (20.67%). The VFAs concentration was the highest (11441.05 mg/kg) at 1/2.5, 5 min and 100 °C, which increased by 711.03% compared to the No.0 (1410.78 mg/kg). In addition, the maximum TOC value was obtained at 53530.84 mg/kg. After HTP, the acetic acid and butyric acid concentrations of the liquid phase increased, while the ethanol concentration decreased. The contents of T,NH4+-N and organic nitrogen in the liquid phase of the HTP system increased, while NO3--N remained at a low level (4.96-20.48 mg/kg). The range and variance analysis showed that the temperature had the greatest effect on the deoiling and the liquid substances transformation of KW among these three factors, followed by solid to liquid ratio and heating time. Based on the orthogonal experiment, the optimal parameters for KW deoiling were A3 (1/1.5), B4 (25 min) and C5 (100 °C). This work provided a reference for the KW deoiling and hence improve the efficient utilization of KW.
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Affiliation(s)
- Ting Xie
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Zhaohan Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin, 150090, China; Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem, Harbin Institute of Technology, China.
| | - Muchen Sun
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Miao Lv
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Dongyi Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Jun Nan
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Yujie Feng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin, 150090, China.
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Abe MM, Martins JR, Sanvezzo PB, Macedo JV, Branciforti MC, Halley P, Botaro VR, Brienzo M. Advantages and Disadvantages of Bioplastics Production from Starch and Lignocellulosic Components. Polymers (Basel) 2021; 13:2484. [PMID: 34372086 PMCID: PMC8348970 DOI: 10.3390/polym13152484] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/25/2021] [Accepted: 07/09/2021] [Indexed: 01/24/2023] Open
Abstract
The accumulation of plastic wastes in different environments has become a topic of major concern over the past decades; therefore, technologies and strategies aimed at mitigating the environmental impacts of petroleum products have gained worldwide relevance. In this scenario, the production of bioplastics mainly from polysaccharides such as starch is a growing strategy and a field of intense research. The use of plasticizers, the preparation of blends, and the reinforcement of bioplastics with lignocellulosic components have shown promising and environmentally safe alternatives for overcoming the limitations of bioplastics, mainly due to the availability, biodegradability, and biocompatibility of such resources. This review addresses the production of bioplastics composed of polysaccharides from plant biomass and its advantages and disadvantages.
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Affiliation(s)
- Mateus Manabu Abe
- Institute for Research in Bioenergy (IPBEN), São Paulo State University (UNESP), Rio Claro 13500-230, SP, Brazil; (M.M.A.); (J.R.M.); (J.V.M.)
| | - Júlia Ribeiro Martins
- Institute for Research in Bioenergy (IPBEN), São Paulo State University (UNESP), Rio Claro 13500-230, SP, Brazil; (M.M.A.); (J.R.M.); (J.V.M.)
| | - Paula Bertolino Sanvezzo
- Department of Materials Engineering, São Carlos School of Engineering (EESC), University of São Paulo (USP), São Carlos 13566-590, SP, Brazil; (P.B.S.); (M.C.B.)
| | - João Vitor Macedo
- Institute for Research in Bioenergy (IPBEN), São Paulo State University (UNESP), Rio Claro 13500-230, SP, Brazil; (M.M.A.); (J.R.M.); (J.V.M.)
| | - Marcia Cristina Branciforti
- Department of Materials Engineering, São Carlos School of Engineering (EESC), University of São Paulo (USP), São Carlos 13566-590, SP, Brazil; (P.B.S.); (M.C.B.)
| | - Peter Halley
- School of Chemical Engineering, The University of Queensland, Level 3, Don Nicklin Building (74), St Lucia, QLD 4072, Australia;
| | - Vagner Roberto Botaro
- Science and Technology Center for Sustainability—CCTS, Federal University of São Carlos, Rodovia João Leme dos Santos, Km 110, Sorocaba 18052-780, SP, Brazil;
| | - Michel Brienzo
- Institute for Research in Bioenergy (IPBEN), São Paulo State University (UNESP), Rio Claro 13500-230, SP, Brazil; (M.M.A.); (J.R.M.); (J.V.M.)
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13
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Wu LJ, Li XX, Liu YX, Yang F, Zhou Q, Ren RP, Lyu YK. Optimization of hydrothermal pretreatment conditions for mesophilic and thermophilic anaerobic digestion of high-solid sludge. BIORESOURCE TECHNOLOGY 2021; 321:124454. [PMID: 33285502 DOI: 10.1016/j.biortech.2020.124454] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/21/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
Hydrothermal pretreatment (HTP) conditions were optimized for continuous mesophilic (MAD) and thermophilic (TAD) anaerobic digestion of high-solid sludge (10-11% total solids). COD solubilization increased with prolonged HTP durations, and became not significant after 210 min. According to the methane production rate and energy consumption, the optimal HTP temperature was determined at 160 °C. Regarding continuous operation without HTP, TAD achieved higher methane yield and volatile solids (VS) reduction, at 0.12 L/g VSadded and 23.9%, respectively. After HTP, methane yield and VS reduction in MAD and TAD were increased by 400% and 191% (MAD), 67% and 72% (TAD), respectively. TAD was limited due to the inhibition from about 2800 mg/L of NH4+-N concentration. The methanogenic activity of MAD was enhanced, whereas TAD displayed a reduced value owing to ammonia inhibition. Ultimately, MAD with HTP and TAD without HTP achieved the higher energy balance, 5.25 and 3.27 kJ/g VS, respectively.
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Affiliation(s)
- Li-Jie Wu
- Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Xiao-Xiao Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yu-Xiang Liu
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Fan Yang
- Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
| | - Quan Zhou
- Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
| | - Rui-Peng Ren
- Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yong-Kang Lyu
- Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
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14
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Razavi AS, Kakar F, Koupaie EH, Hafez H, Elbeshbishy E. Biomethane production improvement by hydrothermal pretreatment of thickened waste activated sludge. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:487-500. [PMID: 33504710 DOI: 10.2166/wst.2020.598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This study evaluated the impact of hydrothermal pretreatment on thickened waste activated sludge (TWAS) for solubilization enhancement and biomethane production improvement through the mesophilic anaerobic digestion process. In order to assess the effect of temperature, retention time and severity index (SI) of the hydrothermal pretreatment, TWAS was exposed to fifteen different pretreatment conditions within a combination of 10 different pretreatment temperature range (150-240 °C), five different retention times (5-30 min) and five different severity indexes (SI = 3, 3.5, 4, 4.5 and 5). The solubilization enhancement was observed in all hydrothermally pretreated samples with the highest solubilization efficiency of 49% in pretreatment conditions of 200 °C and 10 min retention time within the corresponding SI = 4. Biomethane production was not improved in all fifteen pretreatment conditions, pretreatment with SI beyond 4 decreased the biodegradability of TWAS. The highest biomethane production was observed in the pretreatment condition of 170 °C and 10 min with a 40% increase compared to non-pretreated TWAS.
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Affiliation(s)
- Ahmad Shabir Razavi
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, Ontario, M5B 2K3, Canada E-mail:
| | - Farokhlaqa Kakar
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, Ontario, M5B 2K3, Canada E-mail:
| | - Ehssan Hosseini Koupaie
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, Ontario, M5B 2K3, Canada E-mail:
| | - Hisham Hafez
- Greenfield Global, 275 Bloomfield Road, Chatham, Ontario N7M 0N6, Canada
| | - Elsayed Elbeshbishy
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, Ontario, M5B 2K3, Canada E-mail:
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15
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Xu D, Han X, Chen H, Yuan R, Wang F, Zhou B. New insights into impact of thermal hydrolysis pretreatment temperature and time on sewage sludge: Structure and composition of sewage sludge from sewage treatment plant. ENVIRONMENTAL RESEARCH 2020; 191:110122. [PMID: 32835676 DOI: 10.1016/j.envres.2020.110122] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 08/17/2020] [Indexed: 06/11/2023]
Abstract
This work investigated the effects of THP temperature (140-200 °C) and time (10-60 min) on the surface morphology, pyrolysis properties, and soluble compounds of dewatered sludge. Results indicate that higher temperature and longer pretreatment time considerably improve organics hydrolysis (the SCOD content increased 1.4-2.46 times, increasing 2.46 times at 200 °C). In addition, high temperature also improved the sludge pyrolysis efficiency (the highest at 200 °C), and reduced the harmful gas release, especially HCN. Moreover, the surface morphology of the sludge changed, the gap and floccules on the surface of the sludge increased. The carbohydrate content increased the highest; approximately 91.9% at 170 °C. THP promoted the decomposition of the nitrogen compounds in the sludge and facilitated their transition to a liquid phase. The total nitrogen and ammonia nitrogen content doubled, and the organic nitrogen content decreased by 50% with time increased from 10 to 60 min.
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Affiliation(s)
- Dan Xu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xiaomin Han
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Huilun Chen
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Rongfang Yuan
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Fei Wang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Beihai Zhou
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
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16
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Kumar Biswal B, Huang H, Dai J, Chen GH, Wu D. Impact of low-thermal pretreatment on physicochemical properties of saline waste activated sludge, hydrolysis of organics and methane yield in anaerobic digestion. BIORESOURCE TECHNOLOGY 2020; 297:122423. [PMID: 31821954 DOI: 10.1016/j.biortech.2019.122423] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/10/2019] [Accepted: 11/12/2019] [Indexed: 06/10/2023]
Abstract
This work studied the influence of low-thermal pretreatment (60-120 °C) on anaerobic digestion of saline waste activated sludge. The findings showed higher temperature and longer pretreatment time considerably improve organics hydrolysis (soluble chemical oxygen demand increased by 4.2-11.9 times) and volatile solid reduction (maximum 24.6%). Carbohydrate and proteins solubilization accelerated by 5.6-43.8 times and 8.9-35.9 times, respectively by temperature rose from 60 to 120 °C. Low temperature (60 °C) promotes faster release of ammonia and phosphate. Thermal treatment had positive effect on biogas production because methane yield was enhanced by 13.7, 27.0, 29.0 and 29.6% when pretreated at 60, 80, 100 and 120 °C, respectively. Significant positive relationships observed between pretreatment temperature/duration and sludge properties. Energy and economic assessment displayed anaerobic digestion of 80 °C pretreated sludge is more economically feasible. Thus, low-thermal pretreatment technology could be useful for improvement of methane yield in anaerobic digestion.
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Affiliation(s)
- Basanta Kumar Biswal
- Department of Civil and Environmental Engineering, Water Technology Center, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and FYT Research Institute (Guangzhou), The Hong Kong University of Science and Technology, Hong Kong, China
| | - Hao Huang
- Department of Civil and Environmental Engineering, Water Technology Center, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and FYT Research Institute (Guangzhou), The Hong Kong University of Science and Technology, Hong Kong, China
| | - Ji Dai
- Department of Civil and Environmental Engineering, Water Technology Center, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and FYT Research Institute (Guangzhou), The Hong Kong University of Science and Technology, Hong Kong, China
| | - Guang-Hao Chen
- Department of Civil and Environmental Engineering, Water Technology Center, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and FYT Research Institute (Guangzhou), The Hong Kong University of Science and Technology, Hong Kong, China
| | - Di Wu
- Department of Civil and Environmental Engineering, Water Technology Center, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and FYT Research Institute (Guangzhou), The Hong Kong University of Science and Technology, Hong Kong, China.
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17
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Effect of Hydrothermal Pretreatment on Volatile Fatty Acids Production from Source-Separated Organics. Processes (Basel) 2019. [DOI: 10.3390/pr7090576] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The current study investigates the effect of hydrothermal pretreatment (HTP) on acidification of source-separated organics (SSO) in terms of volatile fatty acids (VFAs) production and solubilization. Temperature and retention time for HTP of SSO ranged from 150 to 240 °C and 5 to 30 min, respectively. The soluble substance after hydrothermal pretreatment initially increased, reaching its peak at 210 °C and then declined gradually. The highest overall chemical oxygen demand (COD) solubilization of 63% was observed at “210 °C-20 min” compared to 17% for raw SSO. The highest VFAs yield of 1536 mg VFAs/g VSS added was observed at “210 °C-20 min” compared to 768 mg VFAs/g VSS for raw SSO. Intensification of hydrothermal pretreatment temperature beyond 210 °C resulted in the mineralization of the organics and adversely affected the process.
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18
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Azizi A, Hosseini Koupaie E, Hafez H, Elbeshbishy E. Improving single- and two-stage anaerobic digestion of source separated organics by hydrothermal pretreatment. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.05.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Natividad Pérez-Camacho M, Curry R, Cromie T. Life cycle environmental impacts of biogas production and utilisation substituting for grid electricity, natural gas grid and transport fuels. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 95:90-101. [PMID: 31351658 DOI: 10.1016/j.wasman.2019.05.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 05/23/2019] [Accepted: 05/24/2019] [Indexed: 06/10/2023]
Abstract
In this study, life cycle analysis (LCA) has been applied to evaluate the environmental impacts of biogas production and utilisation substituting for grid electricity, natural gas grid and transport fuels, with a focus on Greenhouse Gas (GHG) emissions. The results demonstrate significant reductions in greenhouse gas emissions for the biogas as a fuel scenario due to the displacement of fossil petrol and diesel fuels (scenario 3), with savings of between 524 and 477 kg of CO2 equivalent (per MWh of energy provided by the fuels). The utilisation of biogas for electricity generation saves around 300 kg of CO2 equivalent per MWh of electricity injected into the grid (scenario 1), while Scenario 2, the upgrading of biogas to biomethane and its injection into the gas grid for heating saves 191 kg of CO2 equivalent (per MWh of energy generated by the biomethane). The results emphasise the benefits of using life cycle analysis to provide an evidence based for bioenergy policy. The limitations of the research are identified and recommendations made for future research priorities to further the use of LCA in the evaluation of bioenergy systems.
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Affiliation(s)
- María Natividad Pérez-Camacho
- Centre for Advanced Sustainable Energy (CASE), David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, UK; School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, BT9 5AG Belfast, Northern Ireland, UK
| | - Robin Curry
- Centre for Advanced Sustainable Energy (CASE), David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, UK; School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, BT9 5AG Belfast, Northern Ireland, UK.
| | - Thomas Cromie
- Centre for Advanced Sustainable Energy (CASE), David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, UK; AgriAD Power LTD, 31 Reservoir Road, Banbridge BT32 4LD, Northern Ireland, UK
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20
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Bala R, Gupta GK, Dasgupta BV, Mondal MK. Pretreatment optimisation and kinetics of batch anaerobic digestion of liquidised OFMSW treated with NaOH: Models verification with experimental data. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 237:313-321. [PMID: 30807977 DOI: 10.1016/j.jenvman.2019.02.083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 02/05/2019] [Accepted: 02/17/2019] [Indexed: 06/09/2023]
Abstract
The enormous generation of municipal solid waste (MSW) due to increased urbanization is causing threat to the environment. MSW is a mixed waste and it comprises of organic fraction as the key fraction called organic fraction of municipal solid waste (OFMSW) along with other fractions. The pretreatment of OFMSW is necessary step to increase the biogas yield. In the present work, NaOH hydrolysis of mechanically liquidised OFMSW was carried out to reduce its complexity and improve the biogas production. Furthermore, hydrolysis parameters were optimised by RSM model for NaOH pretreatment. Optimised conditions achieved from RSM analysis were 0.46 N NaOH loading, 72 h reaction time and 36.05 °C operating temperature. The RSM predicted values of response sCOD and VFA at optimum condition were in good agreement with experimental data signifying the model adequacy. The kinetic of batch anaerobic digestion of OFMSW treated with NaOH at different concentrations and optimised condition had been studied to see the suitability of first order model and modified Gompartz model. The experimental results obtained were best fitted using normalized root mean square error analysis. Biogas production after pretreatment at 0.1, 0.5, 0.9 N NaOH concentration and RSM optimised condition was 369.24, 435.24, 327.84 and 465.67 NL/kg VS, respectively.
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Affiliation(s)
- Renu Bala
- Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, Uttar Pradesh, India
| | - Goutam Kishore Gupta
- Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, Uttar Pradesh, India
| | - Betty Varghese Dasgupta
- Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, Uttar Pradesh, India
| | - Monoj Kumar Mondal
- Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, Uttar Pradesh, India.
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21
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Pagliaccia P, Gallipoli A, Gianico A, Gironi F, Montecchio D, Pastore C, di Bitonto L, Braguglia CM. Variability of food waste chemical composition: Impact of thermal pre-treatment on lignocellulosic matrix and anaerobic biodegradability. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 236:100-107. [PMID: 30716691 DOI: 10.1016/j.jenvman.2019.01.084] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 01/18/2019] [Accepted: 01/23/2019] [Indexed: 06/09/2023]
Abstract
A comprehensive sustainable Food Waste (FW) management is globally needed in order to reduce the environmental pollution and the financial costs due to FW disposal; anaerobic digestion is considered as one of the best environmental-friendly alternatives to this aim. A deep investigation of the chemical composition of different Food waste types (cooked kitchen waste (CKW), fruit and vegetable scraps (FVS) and organic fraction of municipal solid waste (OFMSW)) is here reported, in order to evaluate their relevant substance-specific properties and their impact on anaerobic biodegradability by means of a sophisticated automatic batch test system. Suitability for a mild thermal pre-treatment (T = 134 °C and p = 3.2 bar) to enhance the biological degradation of hardly accessible compounds was investigated. The pre-treatment affected significantly the carbohydrates solubilisation, and was able in reducing part of the lignocellulosic matrix. Moreover, in mesophilic conditions, the high solubilized sugars content favoured the initial recovery of hydrogen (not consumed by hydrogenotrophic methanogenesis), allowing to newly assess the extent of prompt fermentability. Pre-treatment enhanced hydrogen yields of FVS and OFMSW, with gains up to +50%, while the successive methane production, occurring in the same reactor, resulted affected by the lack of the soluble part of carbohydrates, "subtracted" for H2 production. Only in thermophilic conditions, when no hydrogen in the biogas was detected, pre-treatment of OFMSW significantly increased methane yield (from 0.343 to 0.389 L CH4 g-1 VSfed). A thermal pre-treatment seems the recommended solution in order to reduce part of the recalcitrant lignocellulosic matrix of food waste, to improve energy recovery and to eliminate the extra cost needed for pasteurization.
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Affiliation(s)
- Pamela Pagliaccia
- Water Research Institute (IRSA), National Research Council (CNR), Strada Provinciale 35d, km 0.7, 00010, Montelibretti, Rome, Italy; Dipartimento di Ingegneria Chimica, Università degli Studi di Roma "La Sapienza", Via Eudossiana 18, 00184, Rome, Italy
| | - Agata Gallipoli
- Water Research Institute (IRSA), National Research Council (CNR), Strada Provinciale 35d, km 0.7, 00010, Montelibretti, Rome, Italy
| | - Andrea Gianico
- Water Research Institute (IRSA), National Research Council (CNR), Strada Provinciale 35d, km 0.7, 00010, Montelibretti, Rome, Italy
| | - Fausto Gironi
- Water Research Institute (IRSA), National Research Council (CNR), Strada Provinciale 35d, km 0.7, 00010, Montelibretti, Rome, Italy; Dipartimento di Ingegneria Chimica, Università degli Studi di Roma "La Sapienza", Via Eudossiana 18, 00184, Rome, Italy
| | - Daniele Montecchio
- Water Research Institute (IRSA), National Research Council (CNR), Strada Provinciale 35d, km 0.7, 00010, Montelibretti, Rome, Italy
| | - Carlo Pastore
- Water Research Institute (IRSA), National Research Council (CNR), Via F. de Blasio 5, 70132, Bari, Italy
| | - Luigi di Bitonto
- Water Research Institute (IRSA), National Research Council (CNR), Via F. de Blasio 5, 70132, Bari, Italy
| | - Camilla M Braguglia
- Water Research Institute (IRSA), National Research Council (CNR), Strada Provinciale 35d, km 0.7, 00010, Montelibretti, Rome, Italy.
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22
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Lin L, Hosseini Koupaie E, Azizi A, Bazyar Lakeh AA, Dhar BR, Hafez H, Elbeshbishy E. Comparison of Two Process Schemes Combining Hydrothermal Treatment and Acidogenic Fermentation of Source-Separated Organics. Molecules 2019; 24:E1466. [PMID: 31013911 PMCID: PMC6514947 DOI: 10.3390/molecules24081466] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/05/2019] [Accepted: 04/06/2019] [Indexed: 01/04/2023] Open
Abstract
This study compares the effects of pre- and post-hydrothermal treatment of source- separated organics (SSO) on solubilization of particulate organics and acidogenic fermentation for volatile fatty acids (VFAs) production. The overall COD solubilization and solids removal efficiencies from both schemes were comparable. However, the pre-hydrolysis of SSO followed by acidogenic fermentation resulted in a relatively higher VFA yield of 433 mg/g VSS, which was 18% higher than that of a process scheme with a post-hydrolysis of dewatered solids from the fermentation process. Regarding the composition of VFA, the dominance of acetate and butyrate was comparable in both process schemes, while propionate concentration considerably increased in the process with pre-hydrolysis of SSO. The microbial community results showed that the relative abundance of Firmicutes increased substantially in the fermentation of pretreated SSO, indicating that there might be different metabolic pathways for production of VFAs in fermentation process operated with pre-treated SSO. The possible reason might be that the abundance of soluble organic matters due to pre-hydrolysis might stimulate the growth of more kinetically efficient fermentative bacteria as indicated by the increase in Firmicutes percentage.
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Affiliation(s)
- Long Lin
- Department of Civil and Environmental Engineering, University of Alberta, 116 Street NW, Edmonton, AB T6G 1H9, Canada.
| | - Ehssan Hosseini Koupaie
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada.
| | - Armineh Azizi
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada.
| | - Amir Abbas Bazyar Lakeh
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada.
| | - Bipro R Dhar
- Department of Civil and Environmental Engineering, University of Alberta, 116 Street NW, Edmonton, AB T6G 1H9, Canada.
| | - Hisham Hafez
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada.
- Greenfield Global, 275 Bloomfield Road, Chatham, ON N7M 0N6, Canada.
| | - Elsayed Elbeshbishy
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada.
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23
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Optimization of the co-digestion of sewage sludge, maize straw and cow manure: microbial responses and effect of fractional organic characteristics. Sci Rep 2019; 9:2374. [PMID: 30787412 PMCID: PMC6382933 DOI: 10.1038/s41598-019-38829-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 01/09/2019] [Indexed: 02/04/2023] Open
Abstract
The aim of this study was to evaluate the efficiency and optimization of co-digestion using sewage sludge (SS), maize straw (MS) and cow manure (CM) as feeds, and the effects of the mixing ratio and C/N ratio of the substrates were analyzed in detail. Among the three substrates tested, CM/MS exhibited better digestion than CM/SS and SS/MS in terms of all measures, including total daily biogas and net methane volume production, due to the hydrophilic characteristics and high level of biodegradability of CM, as well as its higher C/N ratio. The average biogas production was 613.8 mL/g VS for the co-digestion of CM/MS at a feed concentration of 15 g VS/L and using a 1:1 mixing ratio (C/N ratio of 28.3). The co-digestion of SS/CM/MS performed better than the individual digestion of the components because of the balanced C/N ratios and supply of carbon. The optimum conditions for maximizing methane potential were an SS:CM:MS ratio of 30:35:35 and a bulk VS concentration of 15.0 g VS/L, which led to a maximum methane production of 8047.31 mL (C/N ratio of 12.7). The high-throughput sequencing analysis showed clear differences in microbial communities during the entire co-digestion process.
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Kainthola J, Shariq M, Kalamdhad AS, Goud VV. Enhanced methane potential of rice straw with microwave assisted pretreatment and its kinetic analysis. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 232:188-196. [PMID: 30472562 DOI: 10.1016/j.jenvman.2018.11.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 10/17/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
Biogas has become an alternative clean source of energy. Agricultural residues being renewable and abundant resources could be efficiently used as a feed for methane production. The recalcitrant behaviour of rice straw marks pretreatment an important step to facilitate the transformation into renewable (methane) energy source. Microwave pretreatment has been considered as one of the most effective method, as it can directly (thermal and nonthermal effects) react with the feedstock and destroy its complex matrix. The present study considered the different temperature and exposure time (i.e., 130-230 °C, 2-5 min). Biochemical methane potential was assessed corresponding to the maximum solubilization rate; specific methane yield was obtained as 325.76 mL/g/VS. The total net energy gain of 3288.576 J/g/VS was obtained. The performance parameters were calculated by using different kinetic models. It followed the trend as modified Gompertz > transference function > logistic function models. Field Emission Scanning Electron Microscopy (FESEM) and Fourier Transform Infrared (FTIR) analysis confirmed the breakdown of lignocellulose structure resulting from the rupture of cuticular surface.
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Affiliation(s)
- Jyoti Kainthola
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Mohd Shariq
- Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Ajay S Kalamdhad
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India; Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Vaibhav V Goud
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India; Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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25
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Jeong SY, Chang SW, Ngo HH, Guo W, Nghiem LD, Banu JR, Jeon BH, Nguyen DD. Influence of thermal hydrolysis pretreatment on physicochemical properties and anaerobic biodegradability of waste activated sludge with different solids content. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 85:214-221. [PMID: 30803575 DOI: 10.1016/j.wasman.2018.12.026] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 12/11/2018] [Accepted: 12/20/2018] [Indexed: 05/22/2023]
Abstract
The influence of thermal hydrolysis pretreatment (THP) on physicochemical properties (pH, total solids, volatile solids, chemical oxygen demand, total nitrogen, ammonium nitrogen, volatile fatty acids, viscosity, and cell morphology) and anaerobic biodegradability of highly concentrated waste activated sludge (WAS) with TS content ranging from 1 to 7% was evaluated at different temperatures ranging from 100 to 220 °C. The biomethane potential (BMP) of the WAS was systematically analyzed and evaluated. Images of its cellular structure were also analyzed. The results indicated that THP is a useful method for solubilizing volatile solids and enhancing CH4 production regardless of the TS content of the WAS feed. The ultimate CH4 production determined from the BMP analysis was 313-348 L CH4/kg VS (72.6-74.1% CH4) at the optimum THP temperature of 180 °C. The results showed that THP could improve both the capacity and efficiency of anaerobic digestion, even at a high TS content, and could achieve the dual purpose of sludge reduction and higher energy recovery.
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Affiliation(s)
- Seong Yeob Jeong
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea
| | - Soon Woong Chang
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea.
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Australia
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Australia
| | - Long D Nghiem
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Australia
| | - J Rajesh Banu
- Department of Civil Engineering, Anna University Regional Campus, Tirunelveli 627007, Tamil Nadu, India
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul, Republic of Korea
| | - Dinh Duc Nguyen
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea; Institute of Research and Development, Duy Tan University, Da Nang, Vietnam.
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26
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Li Y, Jin Y, Borrion A, Li H. Current status of food waste generation and management in China. BIORESOURCE TECHNOLOGY 2019; 273:654-665. [PMID: 30446254 DOI: 10.1016/j.biortech.2018.10.083] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 10/27/2018] [Accepted: 10/29/2018] [Indexed: 06/09/2023]
Abstract
The current status of FW generation, including its characteristics, management, and current challenges in China, were analyzed, and further suggestions were made with regards to improvement. About 19.50% of the FW generated could be treated under the current designs for treatment capacity in China. FW characteristics show great variability in different economic regions in China, where both treatment efficiency and FW management are poor. Combined pretreatment and three-phase separation is the most used pretreatment method, and of the current FW pilot projects, anaerobic digestion is the most prevalent, accounting for 76.1% of all projects. Significant regional characteristics have been identified regarding FW generation and the treatment capacity for FW processing. Possible factors influencing FW management in China were also discussed. Finally, detailed suggestions are given for further development of FW treatment capacity, particularly regarding potential technical routes and management measures.
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Affiliation(s)
- Yangyang Li
- School of Environment, Tsinghua University, Beijing 100084, China; Jiaxing Green Energy Environmental Protection Technology Co., Ltd, Jiaxing 314015, China
| | - Yiying Jin
- School of Environment, Tsinghua University, Beijing 100084, China.
| | - Aiduan Borrion
- Dept of Civil, Environ & Geomatic Eng, University College London, London WC1E 6BT, UK
| | - Hailong Li
- Mälardalen University, School of Sustainable Development of Society and Technology, SE-721 23 Västerås, Sweden
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27
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Razavi AS, Hosseini Koupaie E, Azizi A, Hafez H, Elbeshbishy E. Hydrothermal pretreatment of source separated organics for enhanced solubilization and biomethane recovery. BIORESOURCE TECHNOLOGY 2019; 274:502-511. [PMID: 30553962 DOI: 10.1016/j.biortech.2018.12.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 12/07/2018] [Accepted: 12/08/2018] [Indexed: 06/09/2023]
Abstract
The objective of this research was to evaluate the effect of the hydrothermal pretreatment on the solubilization of source separated organics (SSO) as well as the biomethane recovery through the mesophilic batch anaerobic digestion process. For this purpose, the SSO was subjected to fifteen different pretreatment conditions within five different severity index (SI) values (3, 3.5, 4, 4.5, and 5). The pretreatment temperature, holding time, and pressure ranged from 150 to 240 °C, 5 to 30 min, and 476 to 3367 kPa, respectively. The highest solubilization improvement of ∼50% was achieved under the pretreatment condition of "220 °C-10 min-2323 kPa" corresponding to the SI value of 4.5. However, the maximum biomethane production yield of 280 mL/g TCODadded and biomethane production rate of 30 mL/g TCODadded were obtained under the less intense pretreatment conditions of "190 °C-20 min-1247 kPa" and "170 °C-30 min-786 kPa", respectively.
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Affiliation(s)
- A S Razavi
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
| | - E Hosseini Koupaie
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
| | - A Azizi
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
| | - H Hafez
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada; Greenfield Global, 275 Bloomfield Road, Chatham, Ontario N7M 0N6, Canada
| | - E Elbeshbishy
- Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada.
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28
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Gong L, Yang X, Wang Z, Zhou J, You X. Impact of hydrothermal pre-treatment on the anaerobic digestion of different solid–liquid ratio sludges and kinetic analysis. RSC Adv 2019; 9:19104-19113. [PMID: 35558094 PMCID: PMC9088685 DOI: 10.1039/c9ra01662g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 06/09/2019] [Indexed: 11/29/2022] Open
Abstract
This study is an assessment of hydrothermal pre-treatment (HTP) of different solid–liquid ratio (SLR) sewage sludge for enhancement of biogas production by anaerobic digestion. Anaerobic digestion efficacy was investigated by biochemical methane potential (BMP) tests and kinetic analyses. The results indicated that the solid–liquid ratio (SLR) of sludge could influence the COD solubilization and the concentration of volatile fatty acids (VFAs) after HTP. BMP tests revealed that HTP could improve the final methane yield. For the different solid–liquid ratios (5%, 8%, 10%, 12% and 15%) of sludge after HTP, the methane contents were found to be 64%, 66%, 62%, 61% and 60%, respectively. The optimum solid–liquid ratio was found to be 8%, and its cumulative biogas yield was 425.57 N ml g−1 VS. The modified Gompertz model and Logistic model were used for kinetic study of biogas production. Kinetic study results showed that the experimental data could be fitted with the two models and the modified Gompertz model was better fitted with the experimental data than the Logistic model. These findings proved that choosing an appropriate solid–liquid ratio for HTP could effectively improve the anaerobic digestion process of sewage sludge. This study is an assessment of hydrothermal pre-treatment (HTP) of different solid–liquid ratio (SLR) sewage sludge for enhancement of biogas production by anaerobic digestion.![]()
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Affiliation(s)
- Lei Gong
- College of Environmental and Safety Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
| | - Xiaoqi Yang
- College of Environmental and Safety Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
| | - Zaizhao Wang
- College of Environmental and Safety Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
| | - Jun Zhou
- College of Environmental and Safety Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
| | - Xiaogang You
- College of Environmental and Safety Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
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29
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Guo X, Kang K, Shang G, Yu X, Qiu L, Sun G. Influence of mesophilic and thermophilic conditions on the anaerobic digestion of food waste: Focus on the microbial activity and removal of long chain fatty acids. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2018; 36:1106-1112. [PMID: 30306837 DOI: 10.1177/0734242x18801195] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The mesophilic reactor (MR) exhibited advantages in biogas production and performance stability over thermophilic reactor (TR) during the long-term anaerobic digestion (AD) of food waste (FW) with stepwise organic loading rate elevating. It was interesting to explore the mechanism causing the divergences in performances between these two reactors. The microbial activity was compared on day 110 when TR began to deteriorate. The results show that MR had significantly higher specific acetoclastic methanogenic activities (SAMA) and specific propionate and butyrate oxidative activities (SPOA and SBOA) than TR. The SAMA, SPOA and SBOA in TR were only 50.3%, 18.6% and 46.4% of those values in MR, respectively. Remarkably, the specific hydrogenotrophic methanogenic activity of 15.5±2.1, 15.7±4.6 mmol CH4·L-1 original slurry·d-1 in MR and TR was comparative with insignificant difference, which indicates that the microbial activity in TR had been inhibited widely apart from the hydrogenotrophic methanogenesis. Additionally, many particles with the diameters of 1-2 mm were observed to form in MR and identified as complexes of calcium and long chain fatty acids (LCFAs). The formation of calcium crystallization might alleviate the inhibition of LCFAs during AD of FW, which further supports the better performance in MR than TR.
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Affiliation(s)
- Xiaohui Guo
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Kang Kang
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Gaoyuan Shang
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Xiunan Yu
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Ling Qiu
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Guotao Sun
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
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30
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Rajput AA, Visvanathan C. Effect of thermal pretreatment on chemical composition, physical structure and biogas production kinetics of wheat straw. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 221:45-52. [PMID: 29793209 DOI: 10.1016/j.jenvman.2018.05.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 04/29/2018] [Accepted: 05/05/2018] [Indexed: 05/19/2023]
Abstract
Hard lignocellulosic structure of wheat straw is the main hindrance in its anaerobic digestion. Thus, a laboratory scale batch experiment was conducted to study the effect of thermal pretreatment on anaerobic digestion of wheat straw. For this purpose, different thermal pretreatment temperatures of 120, 140, 160 and 180 °C were studied and the results were compared with raw wheat straw. Significant differences in biogas production were observed at temperature higher than 160 °C. Highest biogas yield of 615 Nml/gVS and volatile solids reduction of 69% was observed from wheat straw pretreated at 180 °C. Wheat straw pretreated at 180 °C showed 53% higher biogas yield as compared to untreated. Further, FTIR analysis revealed change in chemical bonds of lignocellulosic structure of wheat straw. Modified Gompertz model was best fitted on biogas production data and predicted shorter lag phase time and higher biogas production as the pretreatment temperature increased. Overall, change in lignocellulosic structure and increase in cellulose content were the main reason in enhancing biogas production.
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Affiliation(s)
- Asad Ayub Rajput
- Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
| | - Chettiyappan Visvanathan
- Environmental Engineering and Management, School of Environment, Resources and Development, Asian Institute of Technology, Bangkok, Thailand
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31
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Bolzonella D, Battista F, Cavinato C, Gottardo M, Micolucci F, Lyberatos G, Pavan P. Recent developments in biohythane production from household food wastes: A review. BIORESOURCE TECHNOLOGY 2018; 257:311-319. [PMID: 29501273 DOI: 10.1016/j.biortech.2018.02.092] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 02/19/2018] [Accepted: 02/20/2018] [Indexed: 06/08/2023]
Abstract
Biohythane is a hydrogen-methane blend with hydrogen concentration between 10 and 30% v/v. It can be produced from different organic substrates by two sequential anaerobic stages: a dark fermentation step followed by a second an anaerobic digestion step, for hydrogen and methane production, respectively. The advantages of this blend compared to either hydrogen or methane, as separate biofuels, are first presented in this work. The two-stage anaerobic process and the main operative parameters are then discussed. Attention is focused on the production of biohythane from household food wastes, one of the most abundant organic substrate available for anaerobic digestion: the main milestones and the future trends are exposed. In particular, the possibility to co-digest food wastes and sewage sludge to improve the process yield is discussed. Finally, the paper illustrates the developments of biohythane application in the automotive sector as well as its reduced environmental burden.
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Affiliation(s)
- David Bolzonella
- Dipartimento di Biotecnologie, Università degli Studi di Verona, Strada Le Grazie 15, 37134 Verona, Italy
| | - Federico Battista
- Dipartimento di Biotecnologie, Università degli Studi di Verona, Strada Le Grazie 15, 37134 Verona, Italy.
| | - Cristina Cavinato
- Dipartimento di Scienze Ambientali, Informatica e Statistica, Università Ca' Foscari, Dorsoduro 3246, 30123 Venezia, Italy
| | - Marco Gottardo
- Dipartimento di Scienze Ambientali, Informatica e Statistica, Università Ca' Foscari, Dorsoduro 3246, 30123 Venezia, Italy
| | - Federico Micolucci
- Faculty of Engineering, Department of Chemical Engineering, Lund University, SE-221 00 Lund, Sweden
| | - Gerasimos Lyberatos
- School of Chemical Engineering, National Technical University of Athens, Zografou 15780, Greece
| | - Paolo Pavan
- Dipartimento di Scienze Ambientali, Informatica e Statistica, Università Ca' Foscari, Dorsoduro 3246, 30123 Venezia, Italy
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32
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Chun SK. Mass balance analysis on the behavior of major elements disposed at a waste landfill site. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 71:233-243. [PMID: 29103895 DOI: 10.1016/j.wasman.2017.10.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 10/19/2017] [Accepted: 10/29/2017] [Indexed: 06/07/2023]
Abstract
Understanding the behavior of major elements in landfill is necessary for effective landfill site management. However, there have been no established methods to study the mass balance of major landfill elements, excluding some studies focused on specific target materials. In this study, different landfill management methodologies were used to conduct mass balance analysis of three major elements at Sudokwon Landfill Site 2 (LS2) in South Korea during 2001-2014. The results indicated that biochemically decomposable carbon accounted for 38.2% of the total landfill organic carbon content. Further, 51.3% of this decomposable fraction underwent decomposition during the research period, 99.0% of which was emitted in landfill gas as CO2 and CH4. In terms of sulfur, 6.1% of the total decomposed sulfur was emitted as H2S (97.0%), and almost all of the total decomposed nitrogen was emitted (5.7%) in leachate as NH4+-N. LS2 had a low decomposition rate due to the dryness of the landfill site and the increasing ratio of demolition waste, which does not decompose easily. Therefore, thermochemical energy recovery before waste disposal and leachate recycling seem to be necessary. In terms of leachate recycling, economic measures to prevent nitrogen accumulation may be required in the long term. Additionally, for suppressing H2S generation, separate disposal of waste soil produced throughout the course of mechanical pretreatment of demolition waste should be conducted.
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Affiliation(s)
- Seung-Kyu Chun
- Graduate School of Energy & Environment, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, South Korea.
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33
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Liu N, Jiang J, Yan F, Xu Y, Yang M, Gao Y, Aihemaiti A, Zou Q. Optimization of simultaneous production of volatile fatty acids and bio-hydrogen from food waste using response surface methodology. RSC Adv 2018; 8:10457-10464. [PMID: 35540465 PMCID: PMC9078927 DOI: 10.1039/c7ra13268a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/08/2018] [Indexed: 11/21/2022] Open
Abstract
Anaerobic digestion of food waste (FW) is commonly considered an effective and green technology to convert solid waste into valuable feedstock including volatile fatty acids (VFAs) and hydrogen. Response surface methodology (RSM) was selected to analyze the production of VFAs and hydrogen from food waste in a batch process. The effect of the three variables i.e. total solid content (TS), pH, and reaction time under each variable at three levels on VFAs and hydrogen production was assessed. The optimum conditions determined via RSM were pH = 7.0, TS = 100 g L−1, and reaction time = 3 d. The maximum VFA and hydrogen production was 26.17 g L−1 and 46.03 mL g−1 volatile solids added, respectively. The ratio of observed hydrogen (Ho) to predicted hydrogen (Hp) was x < 1.0 because of inhibition of hydrogen production by VFA accumulation. The subsequent microbial community analysis result was also consistent with the abovementioned results. The evolution of Bacteroidetes, which facilitate VFA production, has been enriched by about 16.1-times at pH 7.0 followed by 10.2-times at pH 6.0 as compared to that in the uncontrolled pH batch. Response surface methodology was applied to optimal VFA production from food waste, which could evaluate the interactive effect of each parameter as compared to the traditional approach about just one variable a time on VFA production.![]()
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Affiliation(s)
- Nuo Liu
- School of Environment
- Tsinghua University
- Beijing 100084
- China
| | - Jianguo Jiang
- School of Environment
- Tsinghua University
- Beijing 100084
- China
- Key Laboratory for Solid Waste Management and Environment Safety
| | - Feng Yan
- School of Environment
- Tsinghua University
- Beijing 100084
- China
| | - Yiwen Xu
- School of Environment
- Tsinghua University
- Beijing 100084
- China
| | - Meng Yang
- School of Environment
- Tsinghua University
- Beijing 100084
- China
| | - Yuchen Gao
- School of Environment
- Tsinghua University
- Beijing 100084
- China
| | | | - Quan Zou
- School of Environment
- Tsinghua University
- Beijing 100084
- China
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34
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Wang Y, Zang B, Gong X, Liu Y, Li G. Effects of pH buffering agents on the anaerobic hydrolysis acidification stage of kitchen waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 68:603-609. [PMID: 28662845 DOI: 10.1016/j.wasman.2017.06.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/15/2017] [Accepted: 06/21/2017] [Indexed: 06/07/2023]
Abstract
This study investigated effects of initial pH buffering agents on the lab-scale anaerobic hydrolysis acidification stage of kitchen waste (KW). Different cheap, available and suitable buffering agents (NaOH(s), NaOH(l), CaO(s)-NaOH, KOH(l)-NaOH, K2HPO4(s)-KOH, Na2CO3(s)-NaOH) were added under optimal adjusting mode (first two days: per 16h, after: one time per day) which was obtained in previous work. The effects of buffering agents were evaluated according to indexes of pH, VFAs, NH4+-N, TS, VS, VS/TS, TS and VS removal rate. The results showed treatment 5 with adding K2HPO4-KOH buffering agents had the most stable pH (6.7-7.0). Also treatment 5, 2, 4 and 6 provided stable pH ranging in 5-8. Among the treatments, treatment 6 with adding Na2CO3 as initial buffering agents and 10mol/L NaOH as regulator was chosen as the optimal mode for highest VFAs content (44.05g/L) with high acetic acid and butyrate acid proportion (42.64%), TS and VS removal rate (44.84% and 58.67%, respectively), low VS/TS ratio (58.55), fewer adding dosage and low adjusting frequency. The VFAs content of treatment 6 at the end of hydrolysis acidification stage could be used for methanogenic phase of anaerobic two-phase digestion. Thus, treatment 6 (adding Na2CO3 as initial buffering agents and 10mol/L NaOH as regulator) with highest VFAs content and TS and VS removal rate could be considered using in anaerobic hydrolysis acidification stage pH adjustment.
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Affiliation(s)
- Yaya Wang
- College of Agronomy/Center of Biomass Engineering, China Agricultural University, Beijing 100193, China; College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Bing Zang
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Xiaoyan Gong
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Yu Liu
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Guoxue Li
- College of Agronomy/Center of Biomass Engineering, China Agricultural University, Beijing 100193, China; College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China.
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35
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Ding L, Cheng J, Qiao D, Yue L, Li YY, Zhou J, Cen K. Investigating hydrothermal pretreatment of food waste for two-stage fermentative hydrogen and methane co-production. BIORESOURCE TECHNOLOGY 2017; 241:491-499. [PMID: 28600943 DOI: 10.1016/j.biortech.2017.05.114] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/17/2017] [Accepted: 05/18/2017] [Indexed: 06/07/2023]
Abstract
The growing amount of food waste (FW) in China poses great pressure on the environment. Complex solid organics limit the hydrolysis of FW, hence impairing anaerobic digestion. This study employed hydrothermal pretreatment (HTP) to facilitate the solubilization of FW. When HTP temperature increased from 100 to 200°C, soluble carbohydrate content first increased to a peak at 140°C and then decreased, whereas total carbohydrate content was negatively correlated with increasing temperature due to the enhanced degradation and Maillard reactions. Protein solubilization was dramatically promoted after HTP, whereas protein degradation was negligibly enhanced. The hydrogen and methane yields from hydrothermally pretreated FW under the optimum condition (140°C, 20min) through two-stage fermentation were 43.0 and 511.6mL/g volatile solids, respectively, resulting in an energy conversion efficiency (ECE) of 78.6%. The ECE of pretreated FW was higher than that of untreated FW by 31.7%.
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Affiliation(s)
- Lingkan Ding
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Dan Qiao
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Liangchen Yue
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Tohoku University, Sendai 9808579, Japan
| | - Junhu Zhou
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Kefa Cen
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
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