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Adnane I, Taoumi H, Elouahabi K, Lahrech K, Oulmekki A. Valorization of crop residues and animal wastes: Anaerobic co-digestion technology. Heliyon 2024; 10:e26440. [PMID: 38439870 PMCID: PMC10909651 DOI: 10.1016/j.heliyon.2024.e26440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 02/08/2024] [Accepted: 02/13/2024] [Indexed: 03/06/2024] Open
Abstract
To switch the over-reliance on fossil-based resources, curb environmental quality deterioration, and promote the use of renewable fuels, much attention has recently been directed toward the implementation of sustainable and environmentally benign 'waste-to-energy' technology exploiting a clean, inexhaustible, carbon-neutral, and renewable energy source, namely agricultural biomass. From this perspective, anaerobic co-digestion (AcoD) technology emerges as a potent and plausible approach to attain sustainable energy development, foster environmental sustainability, and, most importantly, circumvent the key challenges associated with mono-digestion. This review article provides a comprehensive overview of AcoD as a biochemical valorization pathway of crop residues and livestock manure for biogas production. Furthermore, this manuscript aims to assess the different biotic and abiotic parameters affecting co-digestion efficiency and present recent advancements in pretreatment technologies designed to enhance feedstock biodegradability and conversion rate. It can be concluded that the substantial quantities of crop residues and animal waste generated annually from agricultural practices represent valuable bioenergy resources that can contribute to meeting global targets for affordable renewable energy. Nevertheless, extensive and multidisciplinary research is needed to evolve the industrial-scale implementation of AcoD technology of livestock waste and crop residues, particularly when a pretreatment phase is included, and bridge the gap between small-scale studies and real-world applications.
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Affiliation(s)
- Imane Adnane
- Sidi Mohamed Ben Abdellah University (USMBA), IPI Laboratory, ENS, Fez, Morocco
| | - Hamza Taoumi
- Sidi Mohamed Ben Abdellah University (USMBA), IPI Laboratory, ENS, Fez, Morocco
| | - Karim Elouahabi
- Sidi Mohamed Ben Abdellah University (USMBA), IPI Laboratory, ENS, Fez, Morocco
| | - Khadija Lahrech
- Sidi Mohamed Ben Abdellah University (USMBA), ENSA, Fez, Morocco
| | - Abdellah Oulmekki
- Laboratory of Processes, Materials and Environment (LPME), Faculty of Science and Technology, Sidi Mohamed Ben Abdellah University, Fez, Morocco
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Luo X, Liu Y, Lei L, Shen J, Zhang Q, Wang Y, Ruan R, Cui X. Co-ensiling of rice straw and distillers grains to increase methane production and maximise energy output. BIORESOURCE TECHNOLOGY 2023; 386:129496. [PMID: 37468009 DOI: 10.1016/j.biortech.2023.129496] [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: 05/22/2023] [Revised: 07/03/2023] [Accepted: 07/12/2023] [Indexed: 07/21/2023]
Abstract
High organic matter preservation during ensiling promotes material conversion and energy output. In this study, the effects of co-ensiling distillers grains and rice straw on methane production was evaluated, as distillers grains are highly acidic. For co-ensiling, distillers grains and rice straw were mixed to produce methane at five carbon/nitrogen (C/N) ratios. RD20 (C/N20) and RD25 (C/N25) were defined as high-distillers-grain groups and other mixed groups as low-distillers-grain groups. The results showed that Lactobacillus was enriched in RD25, with the highest lactic acid content reaching 54.0 g/kg of dry matter. The pH and organic dry matter loss of RD25 were lower than those of low-distillers-grain groups, but the result for lignocellulose degradation rate was reversed. An 8.6% increase in methane yield and 7.9% increase in energy output were achieved in RD25. Ensiling-anaerobic digestion systems of C/N25 provide high organic matter preservation and energy output.
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Affiliation(s)
- Xuan Luo
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, PR China
| | - Yuhuan Liu
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, PR China
| | - Luyao Lei
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, PR China
| | - Jiali Shen
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, PR China
| | - Qi Zhang
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, PR China
| | - Yunpu Wang
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, PR China
| | - Roger Ruan
- Center for Biorefining and Dept. of Bioproducts and Biosystems Engineering, University of Minnesota, Paul 55108, USA
| | - Xian Cui
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, PR China.
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Bao X, Guo G, Huo W, Li Q, Xu Q, Chen L. Ensiling pretreatment fortified with laccase and microbial inoculants enhances biomass preservation and bioethanol production of alfalfa stems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159442. [PMID: 36252666 DOI: 10.1016/j.scitotenv.2022.159442] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/18/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
This study investigated the potential of ensiling pretreatment fortified with laccase and a lactic acid bacteria (LAB) inoculant on improving the utilization of alfalfa stems for bioethanol production. The alfalfa stems were ensiled with no additives (Con), 0.04 % laccase (LA), a LAB inoculant containing Pediococcus pentosaceus at 1 × 106 fresh weight (FW) and Pediococcus acidilactici at 3 × 105 cfu/g FW (PP), and a combination of LA and PP (LAP) for 120 days. By reshaping the bacterial community structure of alfalfa stem silages toward a higher abundance of Lactobacillus, the addition of laccase and LAB inoculant either alone or in combination facilitated lactic acid fermentation to reduce fermentation losses, as evidenced by low concentrations of ammonia nitrogen (53.7 to 68.9 g/kg total nitrogen) and ethanol (2.63 to 3.55 g/kg dry matter). All additive treatments increased lignocellulose degradation and soluble sugars concentrations of alfalfa stem silages. Due to delignification and polyphenol removal, glucan and xylan conversion (70.3 % vs. 35.7 % and 51.6 % vs. 27.9 %, respectively) and ethanol conversion efficiency (53.9 % vs. 26.4 %) of alfalfa stems were greatly increased by ensiling fortified with LA versus Con, and these variables (79.8 % for glucan, 58.7 % for xylan, and 60.1 % for ethanol conversion efficiency) were further enhanced with a synergistic effect of LA and PP fortification. The spearman correlation analysis revealed that bioethanol fermentation of silage biomass was closely related to ensiling parameters and total phenols. In conclusion, ensiling pretreatment with LA and PP combination offered a feasible way to efficient utilization of alfalfa stems for bioethanol production.
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Affiliation(s)
- Xueyan Bao
- College of Animal Science, Shanxi Agricultural University, Taigu 030801, Shanxi Province, China
| | - Gang Guo
- College of Animal Science, Shanxi Agricultural University, Taigu 030801, Shanxi Province, China
| | - Wenjie Huo
- College of Animal Science, Shanxi Agricultural University, Taigu 030801, Shanxi Province, China
| | - Qinghong Li
- College of Animal Science, Shanxi Agricultural University, Taigu 030801, Shanxi Province, China
| | - Qingfang Xu
- College of Grassland Science, Shanxi Agricultural University, Taigu 030801, Shanxi Province, China
| | - Lei Chen
- College of Animal Science, Shanxi Agricultural University, Taigu 030801, Shanxi Province, China.
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Effects of Biochar and Nitrogen Application on Rice Biomass Saccharification, Bioethanol Yield and Cell Wall Polymers Features. Int J Mol Sci 2022; 23:ijms232113635. [DOI: 10.3390/ijms232113635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/31/2022] [Accepted: 11/04/2022] [Indexed: 11/09/2022] Open
Abstract
Rice is a major food crop that produces abundant biomass wastes for biofuels. To improve rice biomass and yield, nitrogen (N) fertilizer is excessively used, which is not eco-friendly. Alternatively, biochar (B) application is favored to improve rice biomass and yield under low chemical fertilizers. To minimize the reliance on N fertilizer, we applied four B levels (0, 10, 20, and 30 t B ha−1) combined with two N rates (low-135 and high-180 kg ha−1) to improve biomass yield. Results showed that compared to control, the combined B at 20–30 t ha−1 with low N application significantly improved plant dry matter and arabinose (Ara%), while decreasing cellulose crystallinity (Crl), degree of polymerization (DP), and the ratio of xylose/arabinose (Xyl/Ara), resulting in high hexoses (% cellulose) and bioethanol yield (% dry matter). We concluded that B coupled with N can alter cell wall polymer features in paddy rice resulting in high biomass saccharification and bioethanol production.
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Effect of Novel Aspergillus and Neurospora species-Based Additive on Ensiling Parameters and Biomethane Potential of Sugar Beet Leaves. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12052684] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Research on additives that improve the quality of silages for an enhanced and sustainable biogas production are limited in the literature. Frequently used additives such as lactic acid bacteria enhance the quality of silages but have no significant effect on biogas yield. This study investigated the effect of a new enzymatic additive on the quality of ensiling and BMP of sugar beet leaves. Sugar beet leaves were ensiled with and without the additive (Aspergillus- and Neurospora-based additive) in ratios of 50:1 (A50:1), 150:1 (B150:1), and 500:1 (C500:1) (gsubstrate/gadditive) for 370 days at ambient temperature. Results showed that silages with additive had lower yeast activity and increased biodegradability compared to silages without additive (control). The additive increased the BMP by 45.35%, 24.23%, and 21.69% in silages A50:1, B150:1, and C500:1 respectively, compared to silages without additive (control). Although the novel enzyme is in its early stage, the results indicate that it has a potential for practical application at an additive to substrate ratio (g/g) of 1:50. The use of sugar beet leaves and the novel enzyme for biogas production forms part of the circular economy since it involves the use of wastes for clean energy production.
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Sun H, Cui X, Li R, Guo J, Dong R. Ensiling process for efficient biogas production from lignocellulosic substrates: Methods, mechanisms, and measures. BIORESOURCE TECHNOLOGY 2021; 342:125928. [PMID: 34537529 DOI: 10.1016/j.biortech.2021.125928] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/06/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023]
Abstract
Ensiling has been developed as mainstream technologies to preserve lignocellulose biomass for biogas production. However, the lack of general evaluation methods and process mechanism research hinders the understanding of its effectiveness. In this context, we reviewed existing studies and proposed some key considerations: (1) For assessing the ensiling process, determined dry matter contents should be corrected according to the volatilization loss in oven-drying method to obtain accurate storage loss and methane yield; (2) For comprehensive assessments, the trade-off between storage loss and enhanced biomethane yield should be evaluated from the entire-chain process; (3) The mechanism to enhance methane yield is primarily attributed to increased lignocellulosic biodigestibility through acid-based hydrolysis and biological degradation during ensiling; (4) Measures including co-storage, increasing buffering capacity, adjusting carbon/nitrogen ratio, and additives can be adopted to increase biogas production. The proposed methods, mechanisms, and measures (3Ms) could help initiate the specific quality criteria of biogas-oriented silages.
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Affiliation(s)
- Hui Sun
- College of Engineering, China Agricultural University, Beijing 100083, PR China
| | - Xian Cui
- College of Engineering, China Agricultural University, Beijing 100083, PR China; State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China
| | - Rangling Li
- College of Engineering, China Agricultural University, Beijing 100083, PR China
| | - Jianbin Guo
- College of Engineering, China Agricultural University, Beijing 100083, PR China.
| | - Renjie Dong
- College of Engineering, China Agricultural University, Beijing 100083, PR China; Yantai Institute, China Agricultural University, Yantai 264032, Shandong, PR China
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Riau V, Burgos L, Camps F, Domingo F, Torrellas M, Antón A, Bonmatí A. Closing nutrient loops in a maize rotation. Catch crops to reduce nutrient leaching and increase biogas production by anaerobic co-digestion with dairy manure. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 126:719-727. [PMID: 33878676 DOI: 10.1016/j.wasman.2021.04.006] [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: 07/02/2020] [Revised: 04/01/2021] [Accepted: 04/02/2021] [Indexed: 06/12/2023]
Abstract
Three catch crop species, ryegrass, forage rape and black oat, were grown between successive rotations of maize to reduce nitrogen leaching due to maize fertilization with digested dairy manure. Catch crops showed a high nutrient uptake, but with a wide range, depending on the year and the specie. Ensiling was shown to be a feasible storing method increasing catch crop methane production per hectare between 14-36% compared with fresh catch crop. In semi-continuous co-digestion experiments, methane production was increased between 35-48%, in comparison with anaerobic digestion of dairy manure alone. Catch crops were shown to be a good co-substrate, being a sustainable option to prevent leaching of nutrients to the environment, thus closing the loops from production to utilization by optimal recycling measures.
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Affiliation(s)
- V Riau
- GIRO, Institute of Agrifood Research and Technology (IRTA), Torre Marimon, 08140 - Caldes de Montbui, Barcelona, Catalonia, Spain
| | - L Burgos
- GIRO, Institute of Agrifood Research and Technology (IRTA), Torre Marimon, 08140 - Caldes de Montbui, Barcelona, Catalonia, Spain
| | - F Camps
- Mas Badia, Sustainable Field Crops, Institute of Agrifood Research and Technology (IRTA), 17134 - La Tallada d'Empordà, Girona, Spain
| | - F Domingo
- Mas Badia, Sustainable Field Crops, Institute of Agrifood Research and Technology (IRTA), 17134 - La Tallada d'Empordà, Girona, Spain
| | - M Torrellas
- GIRO, Institute of Agrifood Research and Technology (IRTA), Torre Marimon, 08140 - Caldes de Montbui, Barcelona, Catalonia, Spain
| | - A Antón
- GIRO, Institute of Agrifood Research and Technology (IRTA), Torre Marimon, 08140 - Caldes de Montbui, Barcelona, Catalonia, Spain
| | - A Bonmatí
- GIRO, Institute of Agrifood Research and Technology (IRTA), Torre Marimon, 08140 - Caldes de Montbui, Barcelona, Catalonia, Spain.
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Adams JMM, Turner LB, Toop TA, Kirby ME, Rolin C, Judd E, Inkster R, McEvoy L, Mirza WM, Theodorou MK, Gallagher J. Evaluation of pyrolysis chars derived from marine macroalgae silage as soil amendments. GLOBAL CHANGE BIOLOGY. BIOENERGY 2020; 12:706-727. [PMID: 32999688 PMCID: PMC7508059 DOI: 10.1111/gcbb.12722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 04/27/2020] [Accepted: 05/12/2020] [Indexed: 06/11/2023]
Abstract
Pyrolysis char residues from ensiled macroalgae were examined to determine their potential as growth promoters on germinating and transplanted seedlings. Macroalgae was harvested in May, July and August from beach collections, containing predominantly Laminaria digitata and Laminaria hyperborea; naturally seeded mussel lines dominated by Saccharina latissima; and lines seeded with cultivated L. digitata. Material was ensiled, pressed to pellets and underwent pyrolysis using a thermo-catalytic reforming (TCR) process, with and without additional steam. The chars generated were then assessed through proximate and ultimate analysis. Seasonal changes had the prevalent impact on char composition, though using mixed beach-harvested material gave a greater variability in elements than when using the offshore collections. Applying the char at 5% (v/v)/2% (w/w) into germination or seedling soils was universally negative for the plants, inhibiting or delaying all parameters assessed with no clear advantage in harvesting date, species or TCR processing methodology. In germinating lettuce seeds, soil containing the pyrolysis chars caused a longer germination time, poorer germination, fewer true leaves to be produced, a lower average plant health score and a lower final biomass yield. For transplanted ryegrass seedlings, there were lower plant survival rates, with surviving plants producing fewer leaves and tillers, lower biomass yields when cut and less regrowth after cutting. As water from the char-contained plant pots inhibited the lettuce char control, one further observation was that run-off water from the pyrolysis char released compounds which detrimentally affected cultivated plant growth. This study clearly shows that pyrolysed macroalgae char does not fit the standard assumption that chars can be used as soil amendments at 2% (w/w) addition levels. As the bioeconomy expands in the future, the end use of residues and wastes from bioprocessing will become a genuine global issue, requiring consideration and demonstration rather than hypothesized use.
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Affiliation(s)
- Jessica M. M. Adams
- Biorefining GroupInstitute of Biological, Environmental and Rural SciencesAberystwyth UniversityAberystwythUK
| | - Lesley B. Turner
- Biorefining GroupInstitute of Biological, Environmental and Rural SciencesAberystwyth UniversityAberystwythUK
| | - Trisha A. Toop
- Agricultural Centre for Sustainable Energy SystemsDepartment of Agriculture and the EnvironmentHarper Adams UniversityNewportUK
| | - Marie E. Kirby
- Agricultural Centre for Sustainable Energy SystemsDepartment of Agriculture and the EnvironmentHarper Adams UniversityNewportUK
| | | | - Emma Judd
- Agricultural Centre for Sustainable Energy SystemsDepartment of Agriculture and the EnvironmentHarper Adams UniversityNewportUK
| | | | | | - Waseem M. Mirza
- Agricultural Centre for Sustainable Energy SystemsDepartment of Agriculture and the EnvironmentHarper Adams UniversityNewportUK
| | - Michael K. Theodorou
- Agricultural Centre for Sustainable Energy SystemsDepartment of Agriculture and the EnvironmentHarper Adams UniversityNewportUK
| | - Joseph Gallagher
- Biorefining GroupInstitute of Biological, Environmental and Rural SciencesAberystwyth UniversityAberystwythUK
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Nagle NJ, Donohoe BS, Wolfrum EJ, Kuhn EM, Haas TJ, Ray AE, Wendt LM, Delwiche ME, Weiss ND, Radtke C. Chemical and Structural Changes in Corn Stover After Ensiling: Influence on Bioconversion. Front Bioeng Biotechnol 2020; 8:739. [PMID: 32923429 PMCID: PMC7457055 DOI: 10.3389/fbioe.2020.00739] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 06/10/2020] [Indexed: 11/23/2022] Open
Abstract
Production of biofuels, bioproducts, and bioenergy requires a well-characterized, stable, and reasonably uniform biomass supply and well-established supply chains for shipping biomass from farm fields to biorefineries, while achieving year-round production targets. Preserving and stabilizing biomass feedstock during storage is a necessity for cost-effective and sustainable biofuel production. Ensiling is a common storage method used to preserve and even improve forage quality; however, the impact of ensiling on biomass physical and chemical properties that influence bioconversion processes has been variable. Our objective in this work was to determine the effects of ensiling on lignocellulosic feedstock physicochemical properties and how that influences bioconversion requirements. We observed statistically significant decreases (p < 0.05) in the content of two major structural carbohydrates (glucan and xylan) of 5 and 8%, respectively, between the ensiled and non-ensiled materials. We were unable to detect differences in sugar yields from structural carbohydrates after pretreatment and enzymatic hydrolysis of the ensiled materials compared to non-ensiled controls. Based on this work, we conclude that ensiling the corn stover did not change the bioconversion requirements compared to the control samples and incurred losses of structural carbohydrates. At the light microscopy level, ensiled corn stover exhibited little structural change or relocation of cell wall components as detected by immunocytochemistry. However, more subtle structural changes were revealed by electron microscopy, as ensiled cell walls exhibit ultrastructural characteristics such as wall delimitation intermediate between non-ensiled and dilute-acid-pretreated cell walls. These findings suggest that alternative methods of conversion, such as deacetylation and mechanical refining, could take advantage of lamellar defects and may be more effective than dilute acid or hot water pretreatment for biomass conversion of ensiled materials.
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Affiliation(s)
- Nick J Nagle
- National Renewable Energy Laboratory, Golden, CO, United States
| | - Bryon S Donohoe
- National Renewable Energy Laboratory, Golden, CO, United States
| | | | - Erik M Kuhn
- National Renewable Energy Laboratory, Golden, CO, United States
| | - Thomas J Haas
- National Renewable Energy Laboratory, Golden, CO, United States
| | - Allison E Ray
- Idaho National Laboratory, Idaho Falls, ID, United States
| | - Lynn M Wendt
- Idaho National Laboratory, Idaho Falls, ID, United States
| | | | - Noah D Weiss
- Department of Chemical Engineering, Lund University, Lund, Sweden
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Sun H, Cui X, Stinner W, Zhang L, Ju X, Guo J, Dong R. Ensiling excessively wilted maize stover with biogas slurry: Effects on storage performance and subsequent biogas potential. BIORESOURCE TECHNOLOGY 2020; 305:123042. [PMID: 32105847 DOI: 10.1016/j.biortech.2020.123042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 02/16/2020] [Accepted: 02/17/2020] [Indexed: 06/10/2023]
Abstract
This study evaluated the ensiling performance of excessively wilted maize stover (EWMS) with biogas slurries and the effect on the subsequent biomethane potential. Chicken and pig manure biogas slurries with or without solid-liquid separation were used to amend the stover humidity before ensiling for 60 d. The hetero-lactic-acid fermentative bacteria Atopostipes and Lactobacillus were enriched by the biogas slurry regardless of the solid-liquid separation. Significant increases in the total organic-acid content were observed in silages with chicken (41%) and pig (15%) manure biogas slurries without solid-liquid separation, which was not the case for treatments with solid-liquid separation. During the ensiling process, more lignocellulose was degraded under the high buffer-capacity provided by the ammonia-nitrogen in the biogas slurry. An increase of 7.1%-9.6% was observed for the specific methane yieldmeasured, which offset a storage loss of 5.0%-7.3%. Ensiling EWMS with biogas slurry therefore provides a viable strategy for biogas production.
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Affiliation(s)
- Hui Sun
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China
| | - Xian Cui
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China
| | - Walter Stinner
- German Biomass Research Center, Deutsches Biomasseforschungszentrum gemeinnützige GmbH, Torgauer Str. 116, 04347 Leipzig, Germany; Sino-German Biomass Research Center Anhui, Hefei University, Jinxiu Dadao 99, 230601 Hefei, PR China
| | - Leping Zhang
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China
| | - Xinxin Ju
- Yantai Institute, China Agricultural University, Yantai 264032, Shandong, PR China
| | - Jianbin Guo
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China.
| | - Renjie Dong
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing 100083, PR China; Yantai Institute, China Agricultural University, Yantai 264032, Shandong, PR China
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Teixeira Franco R, Coarita H, Bayard R, Buffière P. An improved procedure to assess the organic biodegradability and the biomethane potential of organic wastes for anaerobic digestion. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2019; 37:746-754. [PMID: 31165675 DOI: 10.1177/0734242x19851201] [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] [Indexed: 06/09/2023]
Abstract
In this study a fractionation procedure was developed and applied to evaluate the potential of some organic wastes (two cattle manures and two catch crops, fresh and after ensiling) for anaerobic digestion. This procedure was based on water extraction of the raw sample, which enabled the evaluation of the contributions of water-soluble and particulate phases to the investigated properties. Biomethane potential (BMP) and chemical oxygen demand (COD) were determined and used to assess the anaerobic biodegradability of raw materials. Analysis of structural carbohydrates, total Kjeldahl nitrogen, water-soluble carbohydrates, volatile fatty acids and pH were also included to explain the main phenomena involved in methane production from the tested biomass. Results show that the origin and the preparation mode had a significant impact on BMP distribution. Based on a COD balance, the biodegradability of the various feedstocks ranged from 45% to 75%. Biodegradability of fresh materials was negatively correlated with the sum of structural carbohydrates and lignin content. Among the feedstock used, the water-soluble phase represented 8-69% of the total COD and 7-46% to the total BMP. Solubilization of organic matter during ensiling was due to the production and accumulation of organic acids from particulate carbohydrates and organic nitrogen. This procedure detects kinetic and biodegradability differences among biomass and thus it can be useful for the design of anaerobic digestion plants. Furthermore, it can be applied to evaluate the efficiency of biomass pretreatments.
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