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Entree

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: 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)

Matéria(s) publicada(s) na Agência FAPESP sobre o auxílio:
Algas são usadas para despoluir esgoto e produzir adubo  
Recovering Nutrients and Carbon from Concentrated Black Water  
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