STUDY ON CHARACTERISTICS OF SOME BACTERIA STRAINS CAPABLE OF DECOMPOSING ORGANIC MATTER IN SALT WATER CONDITIONS ISOLATED FROM SPRATLY ISLANDS

Abstract

Sea and island areas are increasingly polluted by domestic waste. These wastes are degraded slowly in nature because salt-tolerant microorganisms have little ability to degrade organic matter. In order to enhance the decomposition of these pollutants in the sea and islands, it is necessary to strengthen strains capable of decomposing organic substances such as protein, starch, cellulose and tolerating high salinity. Therefore, it is necessary to isolate strains of salt-tolerant bacteria capable of decomposing these pollutants from seas and islands. This study presents the results of determining some biological characteristics of bacterial strains isolated from the soil of Spratly Islands and the ability to decompose substances that are components of domestic waste in seawater conditions. Of the 18 isolates, two are lactic acid bacteria, three are Bacillus, and one is Priestia. All 6 strains have the ability to degrade over 62-75% of protein, starch, and cellulose components after 5 days in seawater at laboratory conditions. The 16S rRNA gene sequences of these strains are also registered on the GenBank.