{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T20:09:46Z","timestamp":1782504586147,"version":"3.54.5"},"reference-count":41,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2021,8,17]],"date-time":"2021-08-17T00:00:00Z","timestamp":1629158400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004569","name":"Ministerstwo Nauki i Szkolnictwa Wy\u017cszego","doi-asserted-by":"publisher","award":["Project No. 005\/RID\/2018\/19"],"award-info":[{"award-number":["Project No. 005\/RID\/2018\/19"]}],"id":[{"id":"10.13039\/501100004569","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004895","name":"European Social Fund","doi-asserted-by":"publisher","award":["PO KL 8.2.2\/30-404-12\/13 and PO KL 8.2.2\/30-355-13\/14"],"award-info":[{"award-number":["PO KL 8.2.2\/30-404-12\/13 and PO KL 8.2.2\/30-355-13\/14"]}],"id":[{"id":"10.13039\/501100004895","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Energies"],"abstract":"<jats:p>One of the anaerobic digestion process products in an agricultural biogas plant is digestate (digested pulp). Large quantities of digestate generated in the process of biogas production all over the world require proper management. Fertilization is the main management of this substrate, so it is essential to look for new alternatives. The work aims to determine and discuss the possibilities of using digestate solid fraction (DSF) for pellets as biofuel production. Pellets from DSF alone and pellets with sawdust, grain straw additives were analyzed. The lower heating value (LHV) based on the dry matter for all analyzed pellets ranged from 19,164 kJ\u2219kg\u22121 to 19,879 kJ\u2219kg\u22121. The ash content was similar for all four samples and ranged from 3.62% to 5.23%. This value is relatively high, which is related to the degree of fermentation in the anaerobic digestion process. The results showed that the DSF substrate after the anaerobic digestion process still has energy potential. Analyzing those results, it seems that DSF can be a highly valuable substrate for solid biofuels production.<\/jats:p>","DOI":"10.3390\/en14165034","type":"journal-article","created":{"date-parts":[[2021,8,17]],"date-time":"2021-08-17T03:43:04Z","timestamp":1629171784000},"page":"5034","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Solid Fraction of Digestate from Biogas Plant as a Material for Pellets Production"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7750-9265","authenticated-orcid":false,"given":"Wojciech","family":"Czeka\u0142a","sequence":"first","affiliation":[{"name":"Department of Biosystems Engineering, Pozna\u0144 University of Life Sciences, Wojska Polskiego 50, 60-627 Pozna\u0144, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,8,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"106244","DOI":"10.1016\/j.fuproc.2019.106244","article-title":"Current perspective on pretreatment technologies using lignocellulosic biomass: An emerging biorefinery concept","volume":"199","author":"Kumar","year":"2020","journal-title":"Fuel Process. Technol."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Jastrz\u0119bski, K., and Kula, P. (2021). Emerging Technology for a Green, Sustainable Energy-Promising Materials for Hydrogen Storage, from Nanotubes to Graphene\u2014A Review. Materials, 14.","DOI":"10.3390\/ma14102499"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1016\/j.egypro.2016.12.053","article-title":"The Role of Green Finance in Environmental Protection: Two Aspects of Market Mechanism and Policies","volume":"104","author":"Wang","year":"2016","journal-title":"Energy Procedia"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"106843","DOI":"10.1016\/j.fuproc.2021.106843","article-title":"Torrefaction influence on combustion kinetics of Malaysian oil palm wastes","volume":"218","author":"Castells","year":"2021","journal-title":"Fuel Process. Technol."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Styks, J., Knapczyk, A., and \u0141apczy\u0144ska-Kordon, B. (2021). Effect of Compaction Pressure and Moisture Content on Post-Agglomeration Elastic Springback of Pellets. Materials, 14.","DOI":"10.3390\/ma14040879"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Williams, O., Taylor, S., Lester, E., Kingman, S., Giddings, D., and Eastwick, C. (2018). Applicability of Mechanical Tests for Biomass Pellet Characterisation for Bioenergy Applications. Materials, 11.","DOI":"10.3390\/ma11081329"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1016\/j.biombioe.2019.04.003","article-title":"Combustion behavior and slagging tendencies of kaolin additivated agricultural pellets and of wood-straw pellet blends in a small-scale boiler","volume":"125","author":"Mack","year":"2019","journal-title":"Biomass Bioenergy"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1016\/j.biombioe.2019.02.011","article-title":"Supercritical methanol for one put biodiesel production from chlorella vulgaris microalgae in the presence of CaO\/TiO2 nano-photocatalyst and subcritical water","volume":"123","author":"Aghilinategh","year":"2019","journal-title":"Biomass Bioenergy"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1016\/j.biombioe.2019.03.014","article-title":"A systematic review of the sustainability assessment of bioenergy: The case of gaseous biofuels","volume":"125","author":"Paredes","year":"2019","journal-title":"Biomass Bioenergy"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"106381","DOI":"10.1016\/j.fuproc.2020.106381","article-title":"Electricity generation using biogas from organic fraction of municipal solid waste generated in provinces of China: Techno-economic and environmental impact analysis","volume":"203","author":"Cudjoe","year":"2020","journal-title":"Fuel Process. Technol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"603","DOI":"10.1016\/j.rser.2015.11.093","article-title":"The use of neural modelling to estimate the methane production from slurry fermentation processes","volume":"56","author":"Dach","year":"2016","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"584","DOI":"10.1016\/j.egyr.2019.04.002","article-title":"Biogas generation from Sorghum bicolor stalk: Effect of pretreatment methods and economic feasibility","volume":"5","author":"Dahunsi","year":"2019","journal-title":"Energy Rep."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1016\/j.esd.2018.02.008","article-title":"A mixed computational and experimental approach to improved biogas burner flame port design","volume":"44","author":"Decker","year":"2018","journal-title":"Energy Sustain. Dev."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Mazurkiewicz, J., Marczuk, A., Pochwatka, P., and Kujawa, S. (2019). Maize Straw as a Valuable Energetic Material for Biogas Plant Feeding. Materials, 12.","DOI":"10.3390\/ma12233848"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"100","DOI":"10.1016\/j.jrurstud.2017.09.009","article-title":"Knowledge networks and their role in shaping the relations within the Agricultural Knowledge and Innovation System in the agroenergy sector. The case of biogas in Tuscany (Italy)","volume":"56","author":"Gava","year":"2017","journal-title":"J. Rural Stud."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Wo\u017aniak, M., Ratajczak, I., Wojcieszak, D., Wa\u015bkiewicz, A., Szentner, K., Przyby\u0142, J., Borysiak, S., and Goli\u0144ski, P. (2021). Chemical and Structural Characterization of Maize Stover Fractions in Aspect of Its Possible Applications. Materials, 14.","DOI":"10.3390\/ma14061527"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1016\/j.egyr.2016.05.005","article-title":"Generating a positive energy balance from using rice straw for anaerobic digestion","volume":"2","author":"Nguyen","year":"2016","journal-title":"Energy Rep."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1016\/j.biosystemseng.2017.05.003","article-title":"Composting potential of the solid fraction of digested pulp produced by a biogas plant","volume":"160","author":"Dach","year":"2017","journal-title":"Biosyst. Eng."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"106804","DOI":"10.1016\/j.fuproc.2021.106804","article-title":"An overview of slagging and fouling indicators and their applicability to biomass fuels","volume":"217","author":"Lachman","year":"2021","journal-title":"Fuel Process. Technol."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"194","DOI":"10.1016\/j.biortech.2014.09.117","article-title":"Effects of mechanical treatment of digestate after anaerobic digestion on the degree of degradation","volume":"178","author":"Lindner","year":"2015","journal-title":"Bioresour. Technol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1016\/j.wasman.2015.10.031","article-title":"Effect of ultrasonication on anaerobic degradability of solid waste digestate","volume":"48","author":"Boni","year":"2016","journal-title":"Waste Manag."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1016\/j.biortech.2017.01.057","article-title":"Characterisation of the biodegradability of post-treated digestates via the chemical accessibility and complexity of organic matter","volume":"231","author":"Maynaud","year":"2017","journal-title":"Bioresour. Technol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"102","DOI":"10.1016\/j.wasman.2016.10.018","article-title":"Assessment of by-products of bioenergy systems (anaerobic digestion and gasification) as potential crop nutrient","volume":"59","author":"Kataki","year":"2016","journal-title":"Waste Manag."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"118454","DOI":"10.1016\/j.jclepro.2019.118454","article-title":"Digestate management in Polish farms as an element of the nutrient cycle","volume":"242","author":"Lewicki","year":"2020","journal-title":"J. Clean. Prod."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"615","DOI":"10.1016\/j.egyr.2019.09.035","article-title":"Determination of kinetic data through the fluidized bed combustion of chars made from vine and kiwi pruning wastes","volume":"6","author":"Moreira","year":"2020","journal-title":"Energy Rep."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"106337","DOI":"10.1016\/j.fuproc.2020.106337","article-title":"Pelletization of Camellia oleifera Abel. shell after storage: Energy consumption and pellet properties","volume":"201","author":"Tan","year":"2020","journal-title":"Fuel Process. Technol."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1118","DOI":"10.1016\/j.energy.2018.06.090","article-title":"The energy value and economic efficiency of solid biofuels produced from digestate and sawdust","volume":"159","author":"Bartnikowska","year":"2018","journal-title":"Energy"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"97","DOI":"10.12911\/22998993\/108653","article-title":"Biogas Production from Raw Digestate and its Fraction","volume":"20","year":"2019","journal-title":"J. Ecol. Eng."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.jenvman.2017.05.022","article-title":"Use of solid digestate for lignocellulolytic enzymes production through submerged fungal fermentation","volume":"199","author":"Musatti","year":"2016","journal-title":"J. Environ. Manag."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"439","DOI":"10.1016\/j.biortech.2014.07.007","article-title":"Comparison of solid-state anaerobic digestion and composting of yard trimmings with effluent from liquid anaerobic digestion","volume":"169","author":"Lin","year":"2014","journal-title":"Bioresour. Technol."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"04005","DOI":"10.1051\/matecconf\/20166004005","article-title":"Economic and energy efficiency of the solid biofuels produced from digested pulp","volume":"60","author":"Bartnikowska","year":"2016","journal-title":"MATEC Web Conf."},{"key":"ref_32","unstructured":"(1981). PN-81\/G-04513 Polish Standard: Solid Fuels\u2014Determination of Heat of Combustion and Calculation of Calorific Value, Polski Komitet Normalizacji."},{"key":"ref_33","unstructured":"(1992). PN-92\/P-50092 Polish Standard: Raw Materials for the Paper Industry\u2014Wood\u2014Chemical Analysis, Polski Komitet Normalizacji."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.rser.2016.12.119","article-title":"Factors affecting wood, energy grass and straw pellet durability\u2014A review","volume":"71","author":"Whittaker","year":"2017","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"211","DOI":"10.1016\/j.fuproc.2018.03.023","article-title":"Biomass pellet combustion: Cavities and ash formation characterized by synchrotron X-ray micro-tomography","volume":"176","author":"Strandberg","year":"2018","journal-title":"Fuel Process. Technol."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"491","DOI":"10.1016\/j.apenergy.2015.06.024","article-title":"Sawdust as an effective binder for making torrefied pellets","volume":"157","author":"Peng","year":"2015","journal-title":"Appl. Energy"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"500","DOI":"10.1016\/j.renene.2019.06.048","article-title":"Production and characterization of fuel pellets from rice husk and wheat straw","volume":"145","year":"2020","journal-title":"Renew. Energy"},{"key":"ref_38","first-page":"67","article-title":"Agricultural and forest biomass as feedstock in the manufacture of solid biofuels","volume":"2","author":"Stolarski","year":"2010","journal-title":"Pol. J. Agron."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1130","DOI":"10.1016\/j.fuel.2013.08.048","article-title":"Spanish biofuels heating value estimation, Part I: Ultimate analysis data","volume":"117","author":"Pizarro","year":"2014","journal-title":"Fuel"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1139","DOI":"10.1016\/j.fuel.2013.08.049","article-title":"Spanish biofuels heating value estimation, Part II: Proximate analysis data","volume":"117","author":"Pizarro","year":"2014","journal-title":"Fuel"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"2544","DOI":"10.1016\/j.fuel.2010.02.008","article-title":"Applicability of biogas digestate as solid fuel","volume":"89","author":"Kratzeisen","year":"2010","journal-title":"Fuel"}],"container-title":["Energies"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1073\/14\/16\/5034\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T06:45:18Z","timestamp":1760165118000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1073\/14\/16\/5034"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,8,17]]},"references-count":41,"journal-issue":{"issue":"16","published-online":{"date-parts":[[2021,8]]}},"alternative-id":["en14165034"],"URL":"https:\/\/doi.org\/10.3390\/en14165034","relation":{},"ISSN":["1996-1073"],"issn-type":[{"value":"1996-1073","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,8,17]]}}}