Quali/quantitative characterization of biogas produced in batch digesters supplied with six distinct substrates

Engenharia Agrícola

João A. Galbiatti²  Anaira D. Caramelo¹  Denise A. Chiconato¹  José R. Araújo¹  Eliana A. B. Girardi¹ 

[1] ,UNESP FCAV Jaboticabal SP

关键词: biogas;    anaerobic;    organic residue;    digesters;    biogás;    anaeróbio;    resíduos orgânicos;    biodigestores;   

DOI  :  10.1590/S0100-69162011000400017

来源: SciELO

【 摘 要 】

The present research was carried out at the DER/FCAV, São Paulo State University - Brazil, with the purpose of analyzing the quantity and quality of biogas produced by six types of substrates. The substrates used in the anaerobic digestion were characterized as: 1- Litter of broiler (LB); 2- Grinded broiler litter (GBL); 3- Broiler litter with wood shavings (BLWS); 4- Grinded broiler litter with wood shavings (GBLWS); 5- Broiler litter with peanut hulls (BLPH); 6- Grinded broiler litter with peanut hull (GBLPH). It was concluded from the collected data that: the (GBL) substrate showed a superior biogas accumulated production in relation to the other substrates, while the BLWS presented an inferior accumulated production; the grinded substrates showed higher quantities of accumulated biogas in relation to the non-grinded substrates, except for GBLPH, with 20.9 m³ inferior than BLPH; the period of maximum biogas production started from 45 to 60 days, declining after 120 days; at 57 days after filling up the digesters the biogas produced had levels of CH4 superior than 53%, and from 99 days all of them produced biogas with levels of CH4 superior than 70%; LB and GBL presented higher concentrations of CH4 in the biogas.

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