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- Title
Application of several pretreatment technologies to a wastewater effluent of a petrochemical industry finally treated with reverse osmosis.
- Authors
Vincent-Vela, M.C.; Álvarez-Blanco, S.; Lora-García, J.; Carbonell-Alcaina, C.; Sáez Muñoz, M.
- Abstract
This work studies the adequacy of different reverse osmosis (RO) pretreatments applied to different petrochemical wastewater effluents. Three effluents from a caprolactam factory were analysed: ion-exchange resin washing effluent (RWE), batch reactor washing effluent and factory outlet effluent. Coagulation–flocculation, microfiltration (MF) and ultrafiltration (UF) were tested as RO pretreatments. Various inorganic coagulants (Aluminium Chloride, Iron (III) Chloride, Aluminium Sulphate and polyaluminium chloride), commercial coagulants (Nophos and ACO) and commercial flocculants (polyacrylamide, CH-30 and active polyfloc) were tested at different dosages and stirring speeds. The highest removal of suspended solids (SS) and the lowest turbidity were obtained for the ion-exchange RWE. Two combinations of coagulants and flocculants were chosen as the most suitable conditions for the coagulation–flocculation process. The ion-exchange RWE was further treated with a combination of MF followed by UF. SS were completely removed and turbidity decreased to 0.136 NTU. The silt density index at 15 min was reduced to 6.41.
- Subjects
PETROLEUM chemicals; WASTEWATER treatment; REVERSE osmosis (Water purification); COAGULATION in water purification; FLOCCULATION in sewage purification; ULTRAFILTRATION; MICROFILTRATION
- Publication
Desalination & Water Treatment, 2015, Vol 55, Issue 13, p3653
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2014.939866