Coagulation-flocculation of wastewaters from a water-based paint and allied products industry and its effect on inert COD.
In this study, treatability of wastewaters generated from a water-based paint and allied products industry has been investigated. As the industry already houses a treatment facility that consists of a coagulation-flocculation unit followed by an activated sludge process, the experimental study focuses on using the existing treatment plant in the most efficient way. In this context the COD removal efficiencies and operating costs of different coagulants i.e., sodium bentonite, alum, FeCl(3) and FeSO(4) have been evaluated. By assessing the refractory COD content of the subsequent activated sludge system outlet, the coagulant yielding the optimal output has been addressed. The outcomes reveal that the optimum result can be obtained by applying 50 mg L(-1) of FeCl(3) coagulant at the original pH of the effluent.
Eremektar
Gulen
G
Istanbul Technical University, Faculty of Civil Engineering, Environmental Engineering Department, Maslak, Istanbul, Turkey.
Goksen
Serdar
S
Babuna
Fatos Germirli
FG
Dogruel
Serdar
S
D000534:Alum Compounds / Q000737:chemistry; D003029:Coagulants / Q000737:chemistry; D005296:Ferrous Compounds / Q000737:chemistry; D005427:Flocculation; D010150:Paint; D014865:Waste Disposal, Fluid / Q000379:methods*; D018505:Waste Management / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification; D014876:Water Pollution / Q000517:prevention & control
D000534:Alum Compounds; D003029:Coagulants; D005296:Ferrous Compounds; D014874:Water Pollutants, Chemical; C020748:ferrous sulfate