The study of flocculation efficiency of microalgae Chlorella vulgaris (Chlorophyta) using chitosan

Abstract

Abstract Recently, many studies on Chlorella vulgaris have been carried out because C vulgaris contains many nutrients that are very useful for humans and the culture of marine organisms as natural foods. Until now, the biggest production cost is the harvesting process cost., This research aims to study the flocculation efficiency of the microalgae C vulgaris using chitosan flocculants. In this study, the treatments were chitosan concentration (10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 ppm) and settling time (10, 20, 30 and 40 minutes). Each treatment was replicated three times. Based on the result of the study, the use of chitosan concentration of 20 ppm showed that the flocculation efficiency value was greater than 90% at the deposition (settling) times of 20, 30, and 40 minutes. Even though the higher the chitosan concentration value given, the greater the flocculation efficiency value, the statistical test showed no significant differences between flocculation efficiency in different concentrations of chitosan and time settling (P> 0.05).