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Pyrolysis of the anaerobic digestion solid by-product: Characterization of digestate decomposition and screening of the biochar use as soil amendment and as additive in anaerobic digestion

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F23%3A10251309" target="_blank" >RIV/61989100:27710/23:10251309 - isvavai.cz</a>

  • Výsledek na webu

    <a href="https://www.webofscience.com/wos/woscc/full-record/WOS:000925133700001" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:000925133700001</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.enconman.2023.116658" target="_blank" >10.1016/j.enconman.2023.116658</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Pyrolysis of the anaerobic digestion solid by-product: Characterization of digestate decomposition and screening of the biochar use as soil amendment and as additive in anaerobic digestion

  • Popis výsledku v původním jazyce

    An industrial digestate was tested under pyrolysis to validate the influence of various temperatures on the potential of waste to provide biochars capable to improve soil productivity and enhance the efficiency of anaerobic digestion. The thermochemical conversion of digestate and the related kinetics were also examined by thermogravimetry and compared to those of biomass. Digestate provided greater proportions of biochar (41.3-66.5 %wt.) than biomass (15.5-48.6 %wt.) at all temperatures, although cellulose and hemicellulose were less thermally stable than in the untreated biomass as indicated by the low activation energies of 150-180 kJ/mol and 83.1-88.2 kJ/mol, respectively compared to those of the polysaccharides in biomass. The behaviour of digestate during conversion and the quantity of generated biochar were both unaffected by the heating rate. Biochar yields however decreased from 55 to 41.3 %wt. in the isothermal tests with the increment of pyrolysis temperature from 300 to 700 oC. The soil amelioration ability of digestate was almost unaffected by pyrolysis at temperatures below 400 oC. Biochar produced at 500 oC possessed the greatest potential to improve soil fertility in the long-term due to its high alkalinity (pH 11.46) and modest cation exchange capacity (CEC) (72.2 cmol kgMINUS SIGN 1). The high-temperature biochar with slightly higher pH (11.51) and significantly larger surface area (116.1 m2/g) was the optimal choice for soil amelioration. Compared to the other biochars, the one produced at the highest temperature was also the best anaerobic digestion agent because of the higher alkalinity (pH 11.51), better minerals content (P, K, Ca, Al) and larger than 100 m2/g surface area, all properties that are desirable for the improvement of stability, methane productivity and mitigation of CO2, H2S and free-NH3 in a digestion system.

  • Název v anglickém jazyce

    Pyrolysis of the anaerobic digestion solid by-product: Characterization of digestate decomposition and screening of the biochar use as soil amendment and as additive in anaerobic digestion

  • Popis výsledku anglicky

    An industrial digestate was tested under pyrolysis to validate the influence of various temperatures on the potential of waste to provide biochars capable to improve soil productivity and enhance the efficiency of anaerobic digestion. The thermochemical conversion of digestate and the related kinetics were also examined by thermogravimetry and compared to those of biomass. Digestate provided greater proportions of biochar (41.3-66.5 %wt.) than biomass (15.5-48.6 %wt.) at all temperatures, although cellulose and hemicellulose were less thermally stable than in the untreated biomass as indicated by the low activation energies of 150-180 kJ/mol and 83.1-88.2 kJ/mol, respectively compared to those of the polysaccharides in biomass. The behaviour of digestate during conversion and the quantity of generated biochar were both unaffected by the heating rate. Biochar yields however decreased from 55 to 41.3 %wt. in the isothermal tests with the increment of pyrolysis temperature from 300 to 700 oC. The soil amelioration ability of digestate was almost unaffected by pyrolysis at temperatures below 400 oC. Biochar produced at 500 oC possessed the greatest potential to improve soil fertility in the long-term due to its high alkalinity (pH 11.46) and modest cation exchange capacity (CEC) (72.2 cmol kgMINUS SIGN 1). The high-temperature biochar with slightly higher pH (11.51) and significantly larger surface area (116.1 m2/g) was the optimal choice for soil amelioration. Compared to the other biochars, the one produced at the highest temperature was also the best anaerobic digestion agent because of the higher alkalinity (pH 11.51), better minerals content (P, K, Ca, Al) and larger than 100 m2/g surface area, all properties that are desirable for the improvement of stability, methane productivity and mitigation of CO2, H2S and free-NH3 in a digestion system.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    20400 - Chemical engineering

Návaznosti výsledku

  • Projekt

    Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Ostatní

  • Rok uplatnění

    2023

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    Energy Conversion and Management

  • ISSN

    0196-8904

  • e-ISSN

  • Svazek periodika

    277

  • Číslo periodika v rámci svazku

    1 February 2023

  • Stát vydavatele periodika

    GB - Spojené království Velké Británie a Severního Irska

  • Počet stran výsledku

    12

  • Strana od-do

    1-12

  • Kód UT WoS článku

    000925133700001

  • EID výsledku v databázi Scopus

    2-s2.0-85146081285