A coagulant aid is a chemical or material, which is not a coagulant, used to assist or modify coagulation. Coagulant aids add density to slow-settling flocs and add toughness to the flocs so that they do not break up during the mixing and settling processes. A coagulant aid improves the effectivenes
A coagulant aid is a chemical or material, which is not a coagulant, used to assist or modify coagulation. Coagulant aids add density to slow-settling flocs and add toughness to the flocs so that they do not break up during the mixing and settling processes.
A coagulant aid improves the effectiveness of a coagulant by:
*Forming larger or heavier particles
*Permitting reduced coagulant dosage
Coagulant aids are also known as flocculants.
Corrosionpedia explains Coagulant Aid
The primary reason to use coagulant aids is to reduce the amount of alum used, which, in turn, decreases the amount of alum sludge produced. Alum sludge is difficult to dewater and to dispose of.
Coagulant aids may be:
*Nonionic, cationic or anionic polymers
The most common problems associated with coagulation are weak flocs that do not stay together long enough to settle completely or flocs that settle poorly. Coagulant aides are added to reduce or eliminate these problems. The addition of a coagulant aid may also reduce the amount of coagulant that is required.
The coagulation process is often enhanced through the use of coagulant aids. Sometimes, excess primary coagulant is added to promote large floc sizes and rapid settling rates. However, in some waters, even large doses of primary coagulant do not produce a satisfactory floc. Generally, the most effective types of coagulant aids are slightly anionic polyacrylamides with very high molecular weights. In some clarification systems, nonionic or cationic types have proven effective.
Factors which affect how well a coagulant aid works include:
urface Water Treatment Primer Course: Dr. Delvin DeBoer, AE2S
Lead In Schools In 4 Minutes | Water Nerd TV
Atrazine In A Minute | Water Nerd TV
Chalky Residue On Your Stainless Steel Cookware? | Water Nerd TV
Disinfection Byproducts In Tap Water: 5 Things To Know
TU Delft - Introduction to Drinking Water Treatment
NOM in drinking water treatment (TU Delft)
Characterisation of Natural Organic Matter in drinking water
Combination of ion exchange and coagulation for removal of Natural Org
NOM recovery during treatment of effluent brine arising from ion excha
TOP 5 Best Water Filtration Systems of 2019
DRINKING NASTY SWAMP WATER (to save the world)
DIY: Make Swamp Water Drinkable
The Water Treatment Process | Water Treatment