Abstract: The coagulation performance of crab shell coagulant (CSC) using coal washery effluent has been investigated at room temperature using various dosages of blended and unblended CSC. In addition, the coagulation reaction rate constant, K, the order of reaction, and the distribution of particles were also determined. Turbidity measurement was employed using the nephelometric (turbidimetric) standard method. The least and highest values for order of reaction ( ) recorded are 0.9 and 6 while that of reaction constant (K) are 1.6618×10-19 L g min 1 and 6.6823×10-2 min 1, respectively. The best turbidity removal occurred for 400 mg L 1 Alum + 100 mg L 1 FeCl3 and 400 mg L 1 CSC. With the exception of few, the computed order of reaction agrees with the results of previous workers. The results obtained confirmed that the theory of fast coagulation holds for the coagulation of the coal washery effluent using the coagulants investigated and at the conditions of the experiment.
M.C. Menkiti , P.K. Igbokwe , F.X.O. Ugodulunwa and O.D. Onukwuli , 2008. Rapid Coagulation/Flocculation Kinetics of Coal Effluent with High Organic Content Using Blended and Unblended Chitin Derived Coagulant (CSC). Research Journal of Applied Sciences, 3: 317-323.