Avaliação do uso de coagulantes orgânicos e inorgânicos no tratamento de efluente de galvanoplastia

Abstract

Among the productive sectors, such as industries are common as large waste generators, among them the electroplating industry, through its hazardous pollutant generating processes, which can be disposed of without proper treatment, can generate numerous environmental damage. Understanding the potential pollutant effect of galvanizing or working present compared to the use of Moringa oleifera and inorganic organic coagulants such as aluminum sulfate and BONDERITE S-WT 8723 in the removal of apparent color and turbidity, following the values: pH, conductivity electrical, total dissolved. A survey was conducted in 3 trials simulating the coagulation / flocculation / sedimentation / filtration process with timeless color collections every 10 minutes to a total of 33 minutes. At the end of all processes, coagulants achieve percentages greater than 80% apparent color removal and turbidity, with the largest apparent color and turbidity reductions attached with BONDERITE S-WT 8723 coagulants. For Moringa oleifera and BONDERITE S-WT coagulants 8723 where, after filtration, it obtains 99% removal for test 3. The electrical conductivity was reduced by approximately 95% and the pH reached between 6 and 9, both achieved after a sand filter pass for all coagulants. The use of organic coagulant Moringa oleifera associated with filtration is recommended for treatment of galvanizing effluent, besides being an organic coagulant that generates a biodegradable sludge, has recent results when compared to inorganic coagulants.