The greater the number of powdered activated carbon adsorption effect is better?
It is generally believed that the more moderate porosity of powder activated carbon is more conducive to the adsorption kinetic equilibrium. According to the experience, some of the larger molecular mass can be used to measure the pore size distribution. Guangzhou city tap water company has with Congo red (molecular weight 697U) reagent and fulvic acid (molecular weight 1000U) reagent as adsorbent for test, the results show that the adsorption effect of the two kinds of wood carbon material than coal carbon, the adsorption effect of carbon powder mesh mesh larger than small good.
According to practical experiences, such as the water in the mouth of adding water, in order to make full use of adsorption capacity of activated carbon powder, should be used to more than 250 mesh powder activated carbon; but at the same time must be strictly controlled the sedimentation tank effluent turbidity is about 1NTU, the strict control of filtration velocity? Dosage and larger in coagulation after precipitation plus water, should use less than 200 powdered activated carbon, to ensure the quality of tap water
According to the water quality status of the raw water, especially the distribution of the molecular weight of organic matter;According to the actual water quality of the water plant to determine the reasonable dosage;According to the production process of the water plant, the appropriate and reasonable dosing points were determined to solve the contradiction between the adsorption of powdered activated carbon and the coagulant, and the adsorption efficiency was improved.
