Recovering nutrients and carbon from concentrated black water: a sustainable decentralized approach for wastewater treatment

• Processo: 13/50351-4
• Linha de fomento: Auxílio à Pesquisa - Regular
• Vigência: 01 de fevereiro de 2014 - 31 de janeiro de 2018
• Área do conhecimento: Engenharias - Engenharia Sanitária - Tratamentos de Águas de Abastecimento e Residuárias
• Convênio/Acordo: Organização Holandesa para a Pesquisa Científica (NWO)
• Pesquisador responsável: Luiz Antonio Daniel
• Beneficiário: Luiz Antonio Daniel
• Pesq. responsável no exterior: Louise Vet
• Instituição no exterior: Royal Netherlands Academy of Arts and Sciences, Holanda
• Instituição-sede: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brasil
• Assunto(s): Tratamento de águas residuárias Efluentes Ciclagem de nutrientes Tratamento biológico anaeróbio Reatores biológicos Reúso da água Fertilizantes

Resumo

The aim of this project is the recovery of nutrients and carbon from concentrated black water (toilet water) while producing a valuable algal biomass product that can be used as fertilizer and a final liquid effluent that can be reused. This will be achieved by collecting the black water and treating it in an upward-flow anaerobic sludge blanket (UASB) reactor followed bya photobioreactor (PBR). After the PBR the algal biomass will be separated from the liquid effluent, harvested and tested for fertilization use. Pathogen will be removed from the remaining liquid effluent and the effluent reused. Two pilot-scale black water treatment systems will be compared in terms of efficiency recovering nutrients and removal of human pathogens indicators. The system at EESC-USP will include the treatment of the concentrated black water (3L per flush) in a mesophilic UASB followed by a PBR, dissolved ozone flotation to separate and remove pathogen from the effluent and algae drying beds, while the NIOO-KNAW system, that alreadv has implemented a vacuum system for black water collection and a thermophilic UASB, will include a PBR followed by an algae settler. The dried algae will be tested for use as fertilizer. We expect to demonstrate how efficient the two pilot-scale systems are in terms of nutrients and human pathogens removal. Moreover, how efficient they are in closing the carbon and nutrients cycle for a cost-effective on-site wastewater treatment system. Finally we will define the value of the ai ai biomass as a fertilizer. (AU)

Publicações científicas

(Referências obtidas automaticamente do Web of Science e do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores)

LEITE, LUAN DE SOUZA; HOFFMANN, MARIA TERESA; DANIEL, LUIZ ANTONIO. Microalgae cultivation for municipal and piggery wastewater treatment in Brazil. JOURNAL OF WATER PROCESS ENGINEERING, v. 31, OCT 2019. Citações Web of Science: 1.