mobile

Under the patronage of:

Journal Metrics


CiteScore: 1.41


More about CiteScore


Source Normalized Impact per Paper (SNIP): 0.488


SCImago Journal Rank (SJR): 0.305

 
SCImago Journal & Country Rank
 

The Role of Coagulation-flocculation in the Pretreatment of Reverse Osmosis in Power Plant

Original scientific paper

Journal of Sustainable Development of Energy, Water and Environment Systems
ARTICLE IN PRESS (volume, issue and page numbers will be assigned later)
DOI: http://dx.doi.org/10.13044/j.sdewes.d7.0266
Luciano Dias Xavier1 , Lidia Yokoyama1, Vanessa Reich de Oliveira2, Gabriel Travagini Ribeiro3, Ofelia Araujo4
1 LabTare – School of Chemistry, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos, 149 ‒ Cidade Universitária, Rio de Janeiro, Brazil
2 Eneva, Praia de Botafogo, 501, Torre Pão de Açúcar ‒ 7º andar, Botafogo, Rio de Janeiro, Brazil
3 EDP Energia Pecém, Industrial Complex and Port of Pecém, São Gonçalo do Amarante, Ceará, Brazil
4 H2CIN – School of Chemistry, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos, 149 ‒ Cidade Universitária, Rio de Janeiro, Brazil

Abstract

The objective of this work is to simulate pretreatment steps on a laboratory scale with the purpose of producing a higher quality permeate for feed reverse osmosis process. Pretreatment steps involved in this work are a combination of physical and chemical processes, such as coagulation-flocculation, sand filtration, and microfiltration. Samples of seawater next to Itaqui thermoelectric power plant in Maranhão, State of Brazil, powered by coal, were collected and characterized. The characterization indicated high levels of turbidity, which is unusual for seawater, indicating the need of pretreatment to reverse osmosis. The combination of polyaluminum chloride dosages of 30 mg/L and 0.3 mg/L of Nalclear 8,173 anionic polymer allowed the reduction of turbidity values to below 1 Nephelometric Turbidity Unit (NTU). The use of coagulation and microfiltration membranes provided values of silt density index next to 3, while with sand filter, the silt density index values were higher than 4.

Keywords: Reverse osmosis, Salinity, Coagulation, Desalination, Membranes, Microfiltration.

Creative Commons License
Views (in 2019): 160 | Downloads (in 2019): 273
Total views: 160 | Total downloads: 273

DBG