Evaluation of boron removal by coagulation process

This research aims to investigate boron removal efficiency using natural and chemical coagulants. The economic performance index will be studied for various coagulants to identify the most sustainable coagulants for boron removal.

Presence of boron in wastewater has become increasingly alarming due to the associated environmental and health issues. Boron removal via coagulation process is a promising technology due to its relatively simple operation in comparison with alternative methods such as ion-exchange. However, limited research was conducted to evaluate the treatment performance of boron using various type of coagulant for different wastewater characteristics. This research aims to evaluate boron removal using natural and chemical coagulants namely, chitosan, alginate, AS01, FC01 and PC01. The optimum coagulant dosage of selected coagulant with highest boron removal efficiency will be identified. Coagulation process will be conducted with standard jar test to evaluate the boron removal efficiency of different coagulants at fixed dosage of 0.8 g/L and varying pH levels (pH 5, 7 and 9). Thereafter, pH, temperature and varying dosages of 0.6 to 1.0 g/L with an interval of 0.1 g/L will be varied to investigate the effect of coagulant dosages on boron removal efficiency. Boron, Chemical Oxygen Demand (COD) and Total Suspended Solids (TSS) concentration will be analyzed with standard APHA method to determine the initial and final concentrations to obtain the removal efficiency. The cost associated with coagulant for effective boron removal will be evaluated in terms of the required coagulant dosage, price per mass of coagulant and optimal boron removal efficiency. Amongst the different coagulants for boron removal from automobile industry wastewater, chitosan is expected to be capable of removing 80% - 95% of boron with the dosage of 0.6 g/L to 0.9 g/L.

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