USING LOCALLY ISOLATED BACILLUS SUBTILIS ZE2013 IN THE PRODUCTION OF SURFACTIN AND STUDYING SOME OF THE OPTIMAL CONDITIONS FOR ITS PRODUCTION: USING LOCALLY ISOLATED BACILLUS SUBTILIS ZE2013 IN THE PRODUCTION OF SURFACTIN AND STUDYING SOME OF THE OPTIMAL CONDITIONS FOR ITS PRODUCTION. IJMRCP 2025, 17 (3), 251-267.