IJEP 41(9): 1071-1077 : Vol. 41 Issue. 9 (September 2021)
1. Manav Rachna Institute of Research and Studies, Department of Chemistry, Faculty of Engineering, Faridabad – 121 004, Haryana, India
2. Manav Rachna University, Department of Chemistry, Faculty of Applied Science, Faridabad – 121 004, Haryana, India
3. National Institute of Technology, Department of Chemistry, Kurukshetra – 136 119, Harayana, India
Abstract
Coagulation-flocculation is an important technique used for removal of turbidity from water. The study aims to investigate effect of alum as coagulant in conjunction with polyelectrolytes as coagulant aids for removal of turbidity from surface water (pond and river water). Water was collected in March, June, September and December 2018 from both pond and river. Turbidity for pond water was 174 NTU, 192 NTU, 101.5 NTU and 147 NTU and for river water, it was 92 NTU, 251 NTU, 121 NTU and 161 NTU for March, June, September and December 2018, respectively. Conventional jar test was done for removal of turbidity by determining the pH, electrical conductivity, temperature, optimum mixing intensity and proper dosage. The two polyelectrolytes used were organopol 5470C and chemfloc 430A. Research aims to evaluate effect of organopol 5470C and chemfloc 430A used as coagulation and flocculation aids in different surface water and to examine their effectiveness for treatment of water. For pH range of 7.0-8.0, organopol 5470C shows better flocculation strength than chemfloc 430A in pond and river water, while, chemfloc 430A has better results at pH more than 8.0. The objective of work is to assess performance of two synthetic polyelectrolytes on turbidity of surface water.
Keywords
Coagulant, Coagulation, Electrical conductivity, Flocculation, Polyelectrolytes, Turbidity
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