STUDY OF ACTIVATED CARBON PROCESS IN REUSE OF SEWAGE TREATED WATER FOR SMART WATER GRID WATER TREATMENT COMBINATION PROCESS

摘要

In this study, we studied the activated carbon process in reuse of sewage treated water for SWG (Smart Water Grid) water treatment combination process. For the water blending in SWG water treatment combination process, adsorption equilibrium and batch experiments of dissolved organic carbon (DOC) in the sewage treated water by activated carbon were conducted. The sewage treated water used was prepared with known quantities of organic and inorganic compounds. It was described using the mathematical model through a series of isotherm and batch experiments. There was unfavorable adsorption region in the low DOC concentration and favorable adsorption region in the high concentration. Adsorption modelling isotherms were predicted by the Freundlich, Langmuir, Sips and hybrid isotherm equations. Especially, hybrid isotherm of Linear and Sips equation was a good adsorption equilibrium in the region of the both the low concentration and high concentration. Linear driving force approximation kinetic equation with Hybrid (linear and Sips) adsorption isotherm model was successfully applied to predict the adsorption kinetics data in various activated carbon adsorbent amount. In applying carbon adsorption for treating water and wastewater, hybrid adsorption equation plus linear equation with Sips equation will be a good new adsorption equilibrium theory and model for the activated carbon process in the SWG water treatment combination process.