Utilization of chitosan clam bloodshells as a coagulant for processing electroplatting waste

Abstract

Abstract Utilization of coagulants with natural ingredients has been widely developed, the advantage of using biocoagulant is the availability of abundant material, easy to obtain it, from renewable materials, and low toxicity. This research compare chitosan clam bloodshells (Anadara granosa) coagulan and alum coagulan, to reduce concentration total chrome, nickel and turbidity in electroplating waste. The variations of coagulan, 300 mg/l and 600 mg/l, variation of the speed used is 150 rpm and 300 rpm. Results of the research, Alum and Chitosan can reduce the concentration of TSS, Nickel and Total Chrome. Alum can removel TSS by 93.75% at dose 300 mg/l, stirring speed of 150 rpm, Nickel by 32.49% at dose of 600 mg/l, stirring speed of 300 rpm, total Chrome removal of 64.09% at dose of 600 mg/l, stirring speed of 300 rpm. Coagulant chitosan TSS by 97.79% at dose 300 mg/l and 600 mg/l, stirring speed of 150 rpm, Nickel by 50,73% at dose of 600 mg/l, stirring speed of 150 rpm, the total chromium by 72.88% at dose of 600 mg/l, stirring speed of 150 rpm. Alum and chitosan coagulant the ability to neutralize the pH in accordance with the standard quality standard of electroplating waste, from 6.2 to 7.6.