A physicochemical treatment (coagulation–flocculation) was applied to a slaughterhouse wastewater, using anionic polyacrylamide as coagulant aid to improve the settling velocity of the flocs formed with the coagulants used: ferric sulphate, aluminium sulphate and polyaluminium chloride.
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Once the pH was selected and with the same coagulant dose, the dose of polyelectrolyte used as coagulant aid was varied between 0 and 100 mg l-1. When anionic polyelectrolytes are used as coagulant aids in conjunction with metal salts, they are usually added after the coagulant due to the negative charge of the particles in the wastewaters,
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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:
This is the first attempt to use cationic polyacrylamide (PAM) as coagulant aid with titanium tetrachloride (TiCl 4) to improve the coagulation performance and floc properties. Coagulation–flocculation treatment was applied to simulated water (with fulvic acid (FA) as model organic matter) for both coagulation behavior investigation and floc ...
Request PDF on ResearchGate | Improvement of coagulation-flocculation process using anionic polyacrylamide as coagulant aid | A physicochemical treatment (coagulation-flocculation) was applied to ...
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Anionic Polyacrylamide Chemicals Flocculant Water Treatment Polymer. 1. Product characteristics. Anionic polyacrylamide (APAM) series products are water-soluble linear polymers synthesized under high degree polymerization, easily soluble in water, almost insoluble in the benzene, the ether, the aliphatics, the acetone and other common organic solvents.
For example, a flocculant may be used in swimming pool or drinking water filtration to aid removal of microscopic particles which would otherwise cause the water to be turbid (cloudy) and which would be difficult or impossible to remove by filtration alone. Many flocculants are multivalent cations such as aluminium, iron, calcium or magnesium.