The removal of color and COD from wastewater containing water base color by coagulation process

Abstract

AB STRACT:In this study acrylic water base color was removed from synthetic wastewater using coagulation process. Experiments were conducted on the sample containing 100 mg/L and 400 mg/L of acrylic water base color. Destruction of color by means of coagulation/flocculation techniques using ferrous sulfate, alum, lime and polyelectrolyte (cationic, anionic and non ionic).The study was performed in a systematic approach searching optimum values of alum and FeSO 4 concentration, pH and temperature. All the experiments were run in a laboratory scale .The obtained results show that treatment with alum and ferrous sulfate alone proved to be very effective in removing the color (> 99 %) and part of COD (60-70 %) from aqueous solution. Lime alone did not significant change on COD and color removal.

Recent Advancement of Coagulation–Flocculation and Its Application in Wastewater Treatment

“…2,56,57 The settling capability of flocs produced after the coagulation−flocculation process depends greatly on the type of coagulant or/and flocculant used in treatment and also, the type of wastewater. In general, flocculants are much more effective in the rapid settling of flocs when compared to Asilian et al 174 dye wastewater (Chicago Sky Blue) 7 M. oleifera (7) coagulation was enhanced under acidic environment due to the cationic character of M. oleifera protein.…”

“…A specific pH range is usually determined by the type of wastewater and coagulant used during the coagulation process in order to achieve higher coagulation efficiency. Table summarizes the optimum pH reported by various researchers in treating several industrial effluents. ,,,,,,, The coagulation performance is inclined to decrease significantly mainly due to the restabilization of colloids during the treatment at pH outside the effective pH range . Organic coagulants from a majority of plant seeds were found to be effective coagulants in effluents or water at lower pH.…”

Potentiality of open burnt clay as an adsorbent for the removal of Congo red from aqueous solution

“…The removal of dye in an economic fashion remains an important problem. Considerable work has been carried out on the removal of dye from wastewater (Perineau, et al, 1982;McKay, et al, 1985;Gupta, 1985;Khattri, 2000;Low, et al, 2000;Liversidge, et al, 1997;Choy, et al, 1999, Asilian, et al, 2006. Water insoluble dyes (e.g.…”

Statistical modeling and process optimization of coagulation-flocculation for treatment of municipal wastewater

“…It is noted that the all terms were significant with p-value less than 0.05. This shows that both dosage and pH were equally significant for the removal of COD [33][34][35]. Finally, the developed model with p-value <0.05 shows that the model was statistically significant.…”