Abstract:
The objective of this research is to study efficiency of COD and Color removal of the leachate from secure landfill by using precipitation of alum and polymer in chemical treatment and by using adsorption by activated carbon in physical treatment The precipitation efficiency for COD and Color removal from the leachate from secure landfill was reported at 52.61 % and 49.10 %, respectively, by the amount of alum used and the amount of polymer anion used was 50 grams per liter at pH 6. although effective in COD removal and decolorization of the leachate from secure landfills be high, But compared to the amount of alum used and the sediment occur as a high volume. The entire investment can not be performed due to high levels of preparation. And the sediment is also a large amount of insoluble and not suitable for treatment by means of precipitation with alum. The adsorption efficiency for COD and Color removal from the leachate was precipitated by alum with polymer has a value equal 89.64 % and 97.45 %, respectively, by using the activated carbon, was 80 grams. per liter, at pH 5 The Regeneration of activated carbon by acetic acid (CH3COOH) 5% by weight. The regeneration of activated carbon can use for 6 rounds, at efficiency 60% The cost of the COD and Color removal of the leachate from secure landfill by using precipitation of alum and polymer in chemical treatment and by using adsorption by activated carbon in physical treatment equivalent to 2,755 Baht per cubic meter