An Assessment of Two Kinds of Organic Polymers Coagulant Aids With Alum to Remove Turbidity from Tigris River Water for Industrial Use

Abstract

This study deals with two kinds of organic polymers coagulant aids with Alum . They are polyacrylamide negative charge and Polyethylene glycol to remove water turbidity of water from the Tigris river to use it in various industrial project .The doses were (0.05 – 0.5 mg / l ) for polyacrylamide ( PAM ) , and (1 – 15 mg / l ) for Polyethylene glycol ( PEG), to be added to different doses of alum about (4 – 36 mg / l ) . As for the initial turbidities of raw water ( 100, 220, 400 ) NTU . The mixture of PAM and Alum was better in removing turbidity in all the levels of initial turbidity of raw water than Alum alone and the mixture of PEG and Alum , except in the turbidity level 220 NTU , PEG was a little better than the mixture of PAM and Alum . The mixture of PEG and Alum was better removal turbidity than Alum alone at (100,220) NTU and less at (400) NTU. The mixture of PAM and Alum has formed clear big flocks which can be removed easily, while using a mixture of PEG and Alum or using Alum alone will not form such flocks. The optimum amounts of PAM ( 0.05 - 0.275 mg/ l ) and for PEG ( 1- 8 mg / l ) when they are added to Alum at the best amount of ( 20 mg / l )...