不同外碳源对生物反硝化影响的研究

Effect of Different Carbon-sources on Bio-denitrification

针对城镇污水处理中碳源不足影响系统脱氮能力的问题,分别以乙酸钠、葡萄糖、甲醇作为外源性碳源,考察各碳源对活性污泥脱氮能力的影响。研究结果表明,在乙酸钠投加量分别为50、100、200mg/L条件下,NO3--N去除率分别为68.8%、85.8%、100%;在葡萄糖投加量为50、100、200mg/L的条件下NO3--N去除率分别为47.3%、64.3%、76.2%;甲醇有一定的滞后性,在投加初期对反硝化能力并没有明显的促进作用。由试验结果可知,乙酸钠可以作为高效外源性碳源用作城镇污水脱氮除磷。

Aimed at the poor carbon sources tion capacity in municipal wastewater treatment of fast biodegradable organics in inflow could affect the denitrifica- plants, Sodium acetate , Glucose and carbinol as external carbon sources were added into activated sludge system and the effects of denitrification capacity with them were studied. The research results demonstrated that external carbon source of sodium acetate were added by （50,100,200） mg/ L The removal rate of NO-3-N respectively. Respectively were 68.8% ,85.8% ,100% ;When the Glucose dosage were added by （50,100,200） mg/L, the removal rate of NO3- -N respectively were47.3% ,64.3% ,76.2% ; Meth- anol has a certain lag, in addition the early and no obvious promoting effect on the denitrification ability. The test results show, sodium acetate can be used as efficient exogenous carbon source for nitrogen and phosphorus removal from municipal wastewater.