Using Compounds Derived from the Glycerol Fermentation as a Carbon Source for Denitrification and Biological Phosphorus Removal

Autor(es)

Dias, Maria E. S. ^[1] ; Lopes, Jessica C. ^[1] ; Carneiro, Rodrigo B. ^[2] ; Damianovic, Marcia H. R. Z. ^[1] ; Foresti, Eugenio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Biol Proc Lab LPB, Sao Carlos Sch Engn EESC, 1100 Joao Dagnone Ave, BR-13563120 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Lab Chromatog CROMA, Inst Chem Sao Carlos, 400 Trabalhador Sao Carlense Ave, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: WATER AIR AND SOIL POLLUTION; v. 232, n. 8 AUG 2021.
• Citações Web of Science: 0

Resumo

Biological nitrogen and phosphorus removal often requires an external carbon source to be effective during wastewater treatments. The purpose of this work was to evaluate a sequencing batch reactor (SBR) operated in a non-conventional anoxic/aerated (An/O) regime (alternated condition) treating synthetic wastewater simulating secondary anaerobic effluent mainly composed by P-phosphate and N-nitrate. The focus was to report the achieved biological efficiency removal of phosphorus and nitrate from the synthetic inlet when adding pre-fermented glycerol as the sole external carbon source. Experimental phase I aimed at the glycerol fermentation in batch reactors, leading to the formation of ethanol and volatile fatty acids. During experimental phase II, a non-acclimated (C1) and an acclimated biomass (C2) were used as inoculum of the SBR operated in the (An/O) regime. The anoxic phase was set to couple denitrification and P-release/uptake. The aerated phase was set to remove any remaining phosphorus. The fermented glycerol was applied in 15 gCOD g(-1) N-NO3- and 29 gCOD g(-1)P-PO4-3 ratios in a sequential batch reactor during a non-aerated phase. This operation favored the development and maintenance of phosphorus-accumulating organisms (PAO), as well as denitrifying organisms, resulting in approximately 90 +/- 11% and 98 +/- 3% for phosphorus and nitrogen removal, respectively. The study showed that the fermented glycerol can be successfully applied as an electron donor for biological nitrogen and phosphorus removal during wastewater treatments. (AU)

• Processo FAPESP: 15/26431-3 - Uso de compostos derivados da fermentação de glicerol como fonte de carbono para desnitrificação e remoção biológica de fósforo
• Beneficiário: Maria Eduarda Simoes Dias
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• 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