Performance assessment and economic aspects for water reclamation from UASB reactor effluent: Influence of coagulant type and membrane pore size

Autor(es)

Ragio, Rodrigo Almeria ; Arantes, Camila Clementina ; Subtil, Eduardo Lucas

• Tipo de documento: Artigo Científico
• Fonte: SEPARATION SCIENCE AND TECHNOLOGY; v. 59, n. 6-9, p. 17-pg., 2024-05-11.

Resumo

This paper investigates the influence of coagulant type in coagulation, flocculation and sedimentation processes and membrane pore size on the performance and economic aspects of water reclamation from UASB reactor effluent. The methodology involved laboratory-scale experiments using two different coagulant types (a modified tannin coagulant, TANm, and a polyaluminum chloride, PACl) and membrane filtration tests with microfiltration (MF) and ultrafiltration (UF). Compared to PACl, TANm had a smaller effect on the pH, consumed less alkalinity, and generated less sludge. However, PACl was more efficient in removing turbidity (89-97%), organic matter (70-72%), and phosphorus within the dosage range of 25 to 100 mg.L-1. Both membranes achieved high removal rates for turbidity and organic matter. Despite the higher flux decay, the MF system could have higher operating flux and lower fouling resistance. The operating costs were higher for the C/F systems, which was attributed to the cost of coagulants and sludge disposal. The system with MF membranes had a lower total cost, and the estimated payback period for the investment was between 0.73 to 0.24 years, based on the values charged for reuse water. This information can be used to optimize the design and operation of UASB-based water reclamation systems. (AU)

• Processo FAPESP: 16/23684-0 - Uma nova abordagem para o tratamento de esgoto e recuperação de água e energia: desenvolvimento de um biorreator eletroquímico com membranas condutivas (BREMc) operado em condição de nitrificação e desnitrificação simultânea (NDS)
• Beneficiário: Eduardo Lucas Subtil
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/11059-0 - Desenvolvimento de módulos de ultrafiltração com membranas de fibra oca de matriz mista, polietersulfona e nanopartículas inorgânicas, para tratamento de água e esgoto
• Beneficiário: José Carlos Mierzwa
• Modalidade de apoio: Auxílio à Pesquisa - Parceria para Inovação Tecnológica - PITE