The stepfeed biological nitrogen removal process(SFBNP) has distinct advantages in nitrogen removal.
分段进水生物脱氮工艺在脱氮方面具有较强的优势。
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The stepfeed plus reversed A2/O biological treatment process is adopted in the first-stage project of Shanghai Volkswagen Jiading Wastewater Treatment Co.
The multi-location horizontal numerical control driller is designed. The machine tool is rotary collocated and processing technic scheme adopts step by stepfeed.