Coag-Flocculation Kinetics of <i>Mucuna sloanei</i> Seed for Phosphorus Removal from Waste Water

Abstract

Mucuna sloanei (MS) an environmentally friendly biomass was used as a coagulant for treatment of phosphorus containing waste water. The study evaluates the coag-flocculation efficiency of MS and its functional kinetic parameter response to varying pH and dosage of the waste water effluent. Coag-flocculation reaction order α, coag-flocculation rate constant K, and coagulation period τ 1/2 were determined. The maximum coag-flocculation performance (97.4%) is recorded at rate constant, K of 1.24 × 10 −4 l/mg·min, dosage of 400 mg/l, pH of 8 and coagulation period τ 1/2 of 0.100 min while the minimum (61%) is recorded at K of 3 × 10 −5 l/gm·min, dosage 100 mg/l, pH of 2 and τ 1/2 of 8.900 mins. The results confirm that MS coagulant is an effective coagulant obeying the theory of fast coagulation in the conditions of the experiments.

Optimal Conditions of Paint Wastewater Coagulation With Gastropod Shell Conchiolin Using Response Surface Design and Artificial Neural Network-Genetic Algorithm

“…The gastropod shell conchiolin (GSC, chito-protein) was extracted from gastropod shells using slight modi cation of the method described by [29,30]. 1500g of gastropod shells were washed, sun dried, crushed and sieved using 0.6 mm sieve to obtain gastropod shell our (GSF).…”

“…Bio-coagulation mechanism followed the actual mechanism of coagulation-occulation process. It involves interaction between the negatively charged suspended particles and the positively charged coagulant particles [29]. This interaction follows four different mechanisms from the fast stirring (coagulation stage) stage to the oc sedimentation stage.…”

“…These agricultural wastes can be processed to chitosan through deproteinization and demineralization [29]. During the deprotenization stage, some loosely attached proteins (conchiolin) are removed [29]. These proteins are disposed as waste products.…”

“…In livestock farming, production and processing of gastropods generate large quantity of shells as waste products. These agricultural wastes can be processed to chitosan through deproteinization and demineralization [29]. During the deprotenization stage, some loosely attached proteins (conchiolin) are removed [29].…”

Statistical Modeling and Optimization of Coag-Flocculation Process of Phosphate Removal from Aqueous Solution Using Ox-Eye Seed (<i>Chrysanthemum leucanthemum</i>) as Coagulant

“…A number of researchers have worked on different materials and methods for the removal of these contaminants from wastewater. Activated carbons were employed for the removal of heavy metals through adsorption processes [1,2,3,4,5], nutrients, particularly phosphates were removed by adsorption on locally prepared activated carbons [6,7,8], agricultural wastes have been prepared as coagulants for turbidity removal through coagulation/flocculation processes [9,10,11,12,13,14]. Some works were based on th use of inorganic chemicals [15,16], ion exchange and reverse osmosis, biological treatment among others [17].…”