biological denitrogenation的用法和樣例：
例句
- 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。 - Biological technology of denitrification and phosphorus removal has been focused on in wastewater treatment field in recent years.
生物脫氮除磷技術一直是污水處理領域所關注的重點。
