Removal of suspended solids from dairy wastewater using flocculation

Girish, C R and Singh, Sushant Kumar and Shenoy, Suhas (2017) Removal of suspended solids from dairy wastewater using flocculation. International Journal Of Mechanical Engineering And Technology, 8 (11). pp. 99-105. ISSN 0976 – 6359

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Dairy industries are considered as the most environmentally unfriendly processes, because they produce wastewater that contains suspended solids. The release of this water into aquatic bodies affects aquatic life and the water quality. This paper investigates coagulation and flocculation processes for the removal of suspended matter from the dairy wastewater. The jar tests were carried out using a polyamine salt coagulant which neutralizes the charge of the particles and polyacryamide flocculent that helps in building the size of the floc. The effective flocculant capacity of the flocculant was determined based on the final turbidity and the suspended solids removal of the wastewater. The capacity was also found as a function of the flocculent types, concentration and pH of the wastewater. A notable decrease in the suspended solids were observed. This was mainly because of the mechanism of electrical double layer formed on the solid surface. By the addition of cationic polyelectrolytes, it neutralises the particles on the outer layer and attracts particles in the inner layer. Thus it leads to the process of charge neutralisation and bridging of smaller floc molecules.

Item Type: Article
Uncontrolled Keywords: Flocculation, Dairy waste, cationic polyelectrolyte, electrical double layer, charge neutralisation, bridging
Subjects: Engineering > MIT Manipal > Chemical
Depositing User: MIT Library
Date Deposited: 02 Dec 2017 03:53
Last Modified: 02 Dec 2017 03:53

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