the chemical process in which a nitro group is added to an organic compound (or substituted for another group in an organic compound)
the oxidation of ammonium compounds in dead organic material into nitrates and nitrites by soil bacteria (making nitrogen available to plants)
造句
用作名詞(n.)
Nitrification is an important step to affect nitrogen removal in biological treatment processes. 生物脫氮系統中，硝化作用好壞是影響脫氮工藝效率的重要步驟。
The effects of salinity on the nitrification of activated sludge without acclimation and with acclimation were studied respectively on the basis of batch experiments. 通過批量試驗系統研究了鹽度對常規活性污泥硝化作用的影響以及污泥在含鹽環境中經過馴化后其硝化功能的變化。