nitrate-nitrogen 基本例句 硝态氮 The result shows that the bio- electrode denitrification has higher efficiency than the biological denitrification in removing nitrate-nitrogen, especially in controlling the form of nitrite- nitrogen. 研究结果表明：电极生物膜法相对于相同生物量的单纯生物膜法而言，有更高的反硝化效率，并能很好控制水中亚硝酸盐氮的生成。 cnki