Technical and economic potential of high-temperature NF and DCMD for gold mining effluent reclamation

Autor: Victor Rezende Moreira, Ana Flávia Souza Foureaux, Luiza B. Grossi, Lucilaine Valéria de Souza Santos, Míriam Cristina Santos Amaral, Yuri Abner Rocha Lebron
Rok vydání: 2020
Předmět:
Zdroj: Chemical Engineering Research and Design. 162:149-161
ISSN: 0263-8762
DOI: 10.1016/j.cherd.2020.08.003
Popis: Direct contact membrane distillation (DCMD) and high-temperature nanofiltration (NF) were compared in terms of technical and economic aspects for the treatment of pressure oxidation process (POX) real effluent. Tests were carried out in bench scale and differences in fouling behavior and its impacts on NF and MD performance were evaluated. High pollutants rejection rates were observed for both systems (>92.4 %). However, DCMD had better permeate quality and lower energy requirement, which contributed significantly to its lower operational costs due to use of the effluent residual heat. CAPEX and OPEX were estimated at US$/m3 2.251 for NF and US$/m3 0.233 for DCMD. DCMD application represents a saving of US$ 45,138.3 annually supplying 250,768.3 m3 of high-quality reuse water. At the end, this research allowed for a better comprehension of these membrane technologies, preventing the production of waste and increasing efficiencies in the uses of energy, water, and resources.
Databáze: OpenAIRE
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