Abdul Ghani Liew Abdullah

Pilot scale microfiltration - coagulation for treatment of retention pond water.

Abstract An evaluation of two commonly used coagulants, alum and ferric chloride was conducted to treat retention pond water using microfiltration. To determine the effectiveness of these coagulants in removing turbidity, color, and total suspended solids two different sets of the experiments were performed. Preliminary test was carried out to evaluate the optimum dosages of coagulants. Optimum turbidity removal was achieved with a 4 and 20 mg/L dosage for ferric chloride and alum, respectively. Generally, coupling microfiltration with coagulation using both alum and ferric chloride exhibited excellent effectiveness for turbidity, color, and total suspended solids removal. The efficiency for alum and ferric chloride for turbidity removal were 96 and 98%, respectively, which was greater than 89% removal using microfiltration alone. Furthermore, microfiltration only demonstrated 81 and 83% removal efficiency for color and total suspended solids removal, respectively. However, microfiltration–coagulation using alum and ferric chloride resulted about 83 and 93% color removal, and 92 and 94% total suspended solids removal, respectively.

Wetlands for Wastewater Treatment and Water Reuse

This chapter discusses the use of natural and constructed wetlands for treatment of wastewaters. Mechanisms of treatment processes for wetlands were described. Function, roles, types, and selection of wetland plants were discussed. The chapter also covers design, monitoring, and maintenance of wetland treatment systems for wastewater. Case studies in the United States, Malaysia, and the United Kingdom were discussed. Pollution control and water reuse for watershed protection and environmental conservation are emphasized.

Wetlands for Wastewater Treatment

This chapter discusses the use of natural and constructed wetlands for treatment of wastewaters. Mechanisms of treatment processes for wetlands were described. Function, roles, types, and selection of wetland plants were discussed. This chapter also covers design, monitoring, and maintenance of wetland treatment systems for wastewater. Case studies in Malaysia and UK were discussed.