Anaerobic digestion of aqueous phase from hydrothermal liquefaction of Spirulina using biostimulated sludge

Autor(es)

Bueno, Beatriz Egerland ^[1] ; Soares, Lais Americo ^[2] ; Quispe-Arpasi, Diana ^[1] ; Sakamoto, Isabel Kimiko ^[2] ; Zhang, Yuanhui ^[3] ; Amancio Varesche, Maria Bernadete ^[2] ; Ribeiro, Rogers ^[1] ; Tommaso, Giovana ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Food Engn, Lab Environm Biotechnol, 225 Duque Caxias Norte, BR-13635900 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Sch Engn Sao Carlos, Dept Hydraul & Sanitat, Lab Biol Proc, 1100 Joao Dagnone Ave, BR-13563120 Sao Carlos - Brazil

^[3] Univ Illinois, Dept Agr & Biol Engn, 1304 W Penns Ave, Urbana, IL 61801 - USA

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 312, SEP 2020.
• Citações Web of Science: 0

Resumo

Hydrothermal liquefaction is a process that converts wet biomass into biofuels, more speci fically bio-crude oil. During the process, post hydrothermal liquefaction waste water (PHWW) is generated, rich in nutrient and organic matter, however potentially toxic. Anaerobic digestion of PHWW from Spirulina , was evaluated using biostimulated sludge as a strategy to optimize the process. The biostimulation was conducted in a sequential batch reactor fed with organic acids and methanol aiming at development of acetogenic and methanogenic microorganism. Anaerobic biodegradability batch assays were performed, with biostimulated sludge and with non-biostimulated sludge, using increasing PHWW concentrations. Biostimulated sludge were more favourable for reaching higher methane yields at higher organic matter concentrations in comparison to non-biostimulated sludge, presenting less inhibition at conditions tested. Biostimulation was a key process to select and favour potential microorganisms involved in specialized uptake of recalcitrant compounds, such as Mesotoga and Methanomethylovorans . (AU)

• Processo FAPESP: 17/12486-6 - Digestão anaeróbia de efluente da produção de óleo bruto por liquefação hidrotermal de cianobactérias
• Beneficiário: Giovana Tommaso
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular