摘要
通过观察间歇曝气生物脱氮系统在不同水温、C/N值下的脱氮效率以及好氧/缺氧一周期内的硝化和反硝化过程,分析了温度和缺氧期C/N值对硝化和反硝化速度的影响,探讨了冬季所需外加碳源量。试验结果表明,秋、冬季提高缺氧期C/N值是保障间歇曝气脱氮系统运行效率的有效措施;在TN负荷为0.034kg/(kgMLVSS·d),水温为15℃时最适C/N值为7,10℃时最适C/N值为9。为了降低冬季运行费用,有必要寻找廉价的外碳源。
Through the observation on the nitrogen removal efficiency of intermittent aeration biological nitrogen removal system at different water temperature, C/N ratios and the nitrification and denitrification process in the aerobic/anoxic period, the influence of temperature and anoxic C/N ratio on the nitrification and denitrification rate was evaluated, and external carbon demand in winter was discussed. The result shows that upgrading the anoxic C/N ratio in autumn and winter is an effective measure to ensure operating efficiency of the system; under TN loading of 0.034 kg/(kgMLVSS·d), the optimum C/N ratio is 7 and 9 respectively at water temperature of 15 ℃ and 10 ℃. It is necessary to look for low-cost external carbon sources for reducing the operating cost in winter.
出处
《中国给水排水》
CAS
CSCD
北大核心
2005年第6期16-19,i001,共5页
China Water & Wastewater
基金
韩国东亚奖学财团资助项目(2003001)
关键词
低C/N
生物脱氮
间歇曝气
外碳源
温度
low C/N ratio
biological nitrogen removal
intermittent aeration
external carbon sources
temperature
