TREATMENT OF SG. PUSU USING NOVEL COAGULANT

MGO COATED WITH CHITOSAN

Abstract

Effective treatment of wastewater is important in order to achieve the sustainable development. High efficiency and low capital requirement are the major prerequisite for the implementation of advanced wastewater treatment. Among various treatments, coagulation-flocculation process using chitosan can be considered as low operational cost and effective in wastewater treatment. Recently, advanced processes in nano-adsorbent by using magnesium oxide (MgO) has been also attracting the attention in water remediation in increasing removal organic dyes and heavy metals. Therefore, this study was conducted to investigate the efficiency of coagulation-flocculation process for removing of turbidity, suspended solids and BOD from Sg. Pusu. Chitosan, MgO coated with chitosan and MgO as a coagulants in treatment of river water were studied using standard jar test apparatus. For optimization study, a set of experiment was designed using response surface methodology (RSM) to optimize the adsorption of MgO coated with chitosan. The result shows that chitosan-MgO showed a good removal of turbidity, suspended solids and COD with respectively 92 %, 98 % and 91 % from the optimization of adsorption of chitosan-MgO. The effect of coagulant dosages; chitosan on turbidity removal was found to be superior was observed at reasonable lower amount of coagulant of 0.25 mg/L with 95 % removal of turbidity in 30 minutes of settling time. The results showed that coagulation-flocculation is effective as a treatment for treating river water.