M56提供了各种水环境中硝化作用的发生和微生物学方面的信息，并提供了防止硝化作用和应对硝化作用事件的当前实用方法。覆盖范围包括硝化的原因和控制、微生物学、监测、操作处理实践，以及预防硝化的资本改进。

M56 provides information on the occurrence and microbiology of nitrification in various water environments and offers current and practical approaches to nitrification prevention and response to a nitrification episode.Coverage includes causes and control of nitrification, microbiology, monitoring, operational treatment practices, and capital improvements for prevention of nitrification.