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igh school year when i attended an intensive but interesting course given by the biological teacher on general biology. my interest was reinforced when i had the opportunity to participate in some research projects in the central south university. in may, 20XX, i began working with to do research on microbial treatment processes for the nitrogen removal in wastewater. i participated in the separation method of nitrifier and denitrifier (chemolithoautotrophic bacteria, very