THE BEHAVIOUR OF ALUMINIUM ION IN TREATMENT OF DAIRY WASTEWATER

Abstract

In this article, it has been prepared synthetic dairy samples according to the global dairy wastewater characteristics. Has been used the OGAWA SEIKI Ltd apparatus and applied on these samples to predict the behavior of the alum in the treatment process. Physiochemical analyses were achieved to samples before and after treatment to stand on the ability of success. These tests have been achieved according to The experimental tests of characteristics were done as stated by American Public Health Association (APHA), American Water Works Association (AWWA), and Water Environment Federation (WEF). Results showed that behind the high removal, efficiency is many mechanical terms of coagulation, perhaps the most prominent of which is the scavenging mechanism. The effectiveness of the aluminum ion is at a certain limit, in limited pH, an increase in the concentration of this ion means an increase in the concentration of the positive charge and get the inverse effect. due to the wide capacity of aluminum ions to make bonds by combining with negative roots, it has been noticed the percentage removal of phosphorus reached up to 95%. These compounds create aluminum phosphorus flocs.  The aluminum phosphorus compounds have gelatinous properties could make enmeshment and attract different particles and then settling in the bottom.