Abstract:

A bench-scale sequencing batch reactor（SBR）process was used for a long term test to treat salinity wastewater. Effects of wastewater salinity，pH and C/N ratio on the shortcut nitrification were investigated. Results showed that the shortcut nitrification can be accomplished in simulated salinity wastewater by using SBR when NaCl concentration gradually increased. The optimal pH for shortcut nitrification was 7.0—8.0 at 30℃ with 10 g/L NaCl concentration. The highest nitrite accumulation concentration was 86.13mg/L with 7.53 C/N ratio. Furthermore，the shortcut nitrification should be carried out in salinity wastewater with lower C/N ratio.

摘要：

采用SBR工艺对含盐废水进行了长期实验室试验，探讨了NaCl浓度、pH值、碳氮（C/N）比等因素对含盐废水短程硝化的影响。结果表明：逐步提高废水中NaCl浓度，SBR 工艺能够实现短程硝化。在温度30℃和NaCl浓度10 g/L的条件下，含盐废水实现短程硝化的最适pH值范围为7.0～8.0。当C/N比为7.53时，亚硝态氮累积量最大，达到86.13 mg/L，含盐废水的短程硝化反应应选择低C/N比条件下进行。