REDUCTION OF VIBRIO ALGINOLYTICUS POPULATION IN SYSTEM IMPRESSED CURRENT ANTI FOULING (ICAF) FOR BIOFOULING PREVENTION

Corrosion is a material damage caused by the influence of the surrounding environment. One of the causes of corrosion is bacteria or it was called as biocorrosion or microbial influenced corrosion (MIC). The use of anti-corrosion systems such as Impressed Current Anti Fouling (ICAF) should continue to be developed so that a shortage of sacrificial anode system can be decreased. The concentration of Cu2+ that was released during operation of ICAF system can be used to reduce the population bacteria that caused bio-fouling. The purposes of the research were to determine the decreasing population of Vibrio alginolyticus using simple ICAF system and the concentration of Cu during simple ICAF process. Vibrio alginolyticus is a marine fouling bacterium that can cause bio-corrosion. The determination of population of Vibrio alginolyticus was conducted using pour plate count methode. The concentrations of Cu2+ were analyzed using Atomic Absorption Spectrophotometer. The other parameter that was observated was the pH during operation of simple ICAF system. The results showed that the value range of population reduction percentages were 87.3% - 99.4%. The measured concentration of Cu2+ metal ions during the operation of the simple ICAF system reached 4.3 mg/L to 18.3 mg/L. In conclusion, the simple ICAF system can be used to reduce population of Vibrio alginolyticus so that the bio-corrosion can be prevented