Potential of Autotrophic Microalgae (Spirulina plantensis) in Decreased Coliform Bacteria

摘要

Objectives: Dense settlements spend the distance between the well and the toilet. So, many sources of clean water are contaminated by coliform bacteria. Microalgae is an important micro-plant which is a bioindicator of clean water. Besides that microalgae can also decrease the number of coliform bacteria. One potential microalga that is not yet known for its potential in decreased the number of coliform bacteria is Spirulina platensis. The purpose of this study was to determine the potential of Spirulina platensis in decreased the number of bacteria in polluted well water so that it is expected to decrease the number of pathogenic bacteria that can cause infectious diseases. This research used Spirulina platensis, which was cultured, and then it was remediated to water wells. The value of the Most Probable Number (MPN) is calculated in water before and after remediation. The results obtained showed that the number of microalgae decreased as much as coliforms, with a mean decrease is 94.6%. The MPN values of sample 1 decrease from 75 cells / 100 mL to 1.8 cells / 100 mL and in sample 3 from 93 cells / 100 mL to 7.8 cells / 100 mL.