Autor(es)

Devens, Kauanna Uyara ; Ribeiro, Alexandre Rodrigues ; Camargo, Franciele Pereira ; Sakamoto, Isabel Kimiko ; Varesche, Maria Bernadete Amancio ; Silva, Edson Luiz

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 12, n. 3, p. 11-pg., 2024-05-20.

Resumo

This study aimed at evaluating the feasibility of CH4 4 production in a mesophilic (30 degrees C) single-stage anaerobic co-digestion of cassava wastewater (CW) and glycerol in an anaerobic fluidized bed reactor (AFBR) with mixing ratio of 50 % / 50 % CW/Gly on a (chemical oxygen demand)COD basis. Thus, the following strategy was used: increasing the organic loading rate (OLR) (1-20 g COD.L-- 1 .d- 1 ) by increasing the substrate concentration (1-20 g COD.L-1)- 1 ) and applying a hydraulic detention time (HRT) of 24 h. The AFBR presented a maximum methane (CH4) 4 ) content of 88.38+1.94 % and a CH4 4 yield (MY) of 293.48+18.37 mL of CH4.mL- 4 .mL- 1CODrem COD rem in the OLR of 1 g COD.L-1.d-1- 1 .d- 1 and the maximum methane production rate (MPR) of 62.09+2.75 mL of CH 4 .L- 1 .h- 1 in the OLR of 20 g COD.L-- 1 .d- 1 . The conversion of glycerol and carbohydrates remained above 91+0.54 % and 82 +2.79 %, respectively, and the COD conversion was above 80+0.65 %. The main metabolites were HAc, HPr, HBu, EtOH and HVa. The most abundant genera identified in the AFBR were Izemoplasmatales and Enterobacteriaceae for the bacteria domain, and Methanosaeta, , Methanobacterium for the archaea domain. The single-stage system is robust and can operate with higher OLR without reducing the efficiency of wastewater treatment and CH4 4 production. (AU)

• Processo FAPESP: 15/06246-7 - Aplicação do Conceito de Biorrefinaria a Estações de Tratamento Biológico de Águas Residuárias: O Controle da Poluição Ambiental Aliado à Recuperação de Matéria e Energia
• Beneficiário: Marcelo Zaiat
• Modalidade de apoio: Auxílio à Pesquisa - Temático