In the anoxic phase, without adding external carbon source, internal carbon source is used for denitrification.
在缺氧阶段，可利用内碳源实现剩余硝态氮的反硝化。
It is found that HRT, influent ammonia nitrogen and external carbon source have significant effect on biological nitrification and denitrification.
通过试验发现HRT、进水氨氮和外碳源对生物硝化和反硝化有重要影响。
The entire system consists of a compact, lightweight pulse control panel and carbon fiber drop-in pans. The only external equipment required is a compressed air source.
整套系统包含一个紧凑、轻便的脉冲控制面板和碳纤维岩屑盘，唯一所需的外部设备是一个压缩空气源。
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