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Article
Publication date: 16 March 2011

M. Menkiti and O. Onukwuli

Coag-flocculation behavior of Brachystegia eurycoma coagulant (BEC) in respect of pH variation in coal washery effluent has been investigated at room temperature using various…

Abstract

Coag-flocculation behavior of Brachystegia eurycoma coagulant (BEC) in respect of pH variation in coal washery effluent has been investigated at room temperature using various dosages of unblended BEC. Coag-flocculation parameters such as order of reaction α, rate constant (K and Ks), coagulation period, τ1/2 e.t.c were determined. Turbidity measurement was employed using the single angle nephelometric method while BEC processing was based on work reported by Adebowale and Adebowale. Maximum parameter values are recorded at K of 6.6667×10-3m3/kg.s; dosage of (0.2 and 0.4kg/m3), pH2 and τ1/2 of 1.7293s while the minimum values are recorded at 5.00×10-4m3/kg.s, dosage of 0.3kg/m3, pH 6 and τ1/2 of 23.0572s. Minimum value of coag-flocculation efficiency is >98%; thus establishing BEC as a potential effective coag-flocculant. Parameters obtained lie within the range of previous works and confirm that the theory of perikinetics holds for coag-flocculation of the coal washery effluent using BEC at the experimental conditions.

Details

World Journal of Engineering, vol. 8 no. 1
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 20 February 2014

M. Menkiti and O. Onukwuli

Chitin Derived Coag-flocculant (CDC), is a cheap, abundant and eco-friendly deacetylated cationic polymer applied in this study at a pilot scale for the treatment of Brewery…

Abstract

Chitin Derived Coag-flocculant (CDC), is a cheap, abundant and eco-friendly deacetylated cationic polymer applied in this study at a pilot scale for the treatment of Brewery Effluent (BRE). The study investigates the influence of varying BRE pH on the coag-flocculation kinetics and behavior of the aggregation process at varying CDC dosages. The best coag-flocculation performance is recorded at rate constant, Km, of 0.0003 l/mg·min, half life, τ1/2, of 0.6846 min, pH of 4, dosage of 100 mg/l and efficiency, E (%) of 99.8791. Minimum efficiency (%) > 96 was achieved at 3 minutes of coag-flocculation, establishing CDC as an effective water treatment agent at the conditions of the experiment.

Details

World Journal of Engineering, vol. 10 no. 6
Type: Research Article
ISSN: 1708-5284

Keywords

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