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