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- W2309675881 abstract "Tantemsapya, N., Wirojanagud, W., and Sakolchai, S. This study focused on removal of color, COD, and lignin in wastewater of pulp and paper mill using white wood ash and black wood ash that generated from boilers unit in the pulp and paper mill. Batch experiments were setup for studying the equilibrium time, pH, quantity of wood ash and adsorption isotherm. The results from the equilibrium time experiment concluded that the equilibrium time of the white wood ash is much more rapid than the black wood ash indicated as 2 minutes and 25 minutes, respectively. The effect of pH on the removal of such studied parameters was different for the white and black wood ash. Variation in pH of wastewater at the levels of 2 to 10 had no influence in removal of color (89-93%), COD (66-70%) and lignin (78-82%) when white wood ash was used, whereas the effect of pH on the removal was evident when using black wood ash. The highest removal of color (42.2%), lignin (31.1%) and COD (29.7%) was found when the initial pH was adjusted to 2 and such removal was gradually decreased when pH was raised. The optimum dose of white wood ash for the highest removal efficiency was 20 g ash /L of wastewater. This amount of wood ash can remove color 95%, lignin 80% and COD 69%. The reason for high removal efficiency of white wood ash might occur from the precipitation of lignin by CaO which is the major component of the ash. For the black wood ash, the optimum dose was calculated from the isotherm equation 1 Ph.D. (Environmental Engineering)," @default.
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- W2309675881 date "2004-02-01" @default.
- W2309675881 modified "2023-09-25" @default.
- W2309675881 title "Removal of color, COD and lignin of pulp and paper wastewater using wood ash" @default.
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