Abstract:

Taking a rtificially prepared high ammonia nitrogen wastewater as the research object，the sequencing batch reactor （SBR） has been used for investigating the achievements and stability of shortcut biological nitrogen removal under real-time control conditions. The experimental results indicate that the pH in nitrification process should be controlled at 7.7-8.6， and DO 0.35-0.80 mg/L. Nitrite is the main element in the effluent when aerationhas ended after running for twenty-four days. Based on this，gradually increasing aeration rate，and lowing influentpH，the short-cut nitrification is not destroyed and the rate of nitrosation remains over 70%. After over aeration for6 d，as to the nitrification type，the shortcut nitrification whose rate of nitrosation is 90.7% changes into full nitrification whose rate of nitrosation is 40.7%.

Key words: sequencing batch reactor, shortcut nitrification, ammonia nitrogen wastewater

摘要：

以人工模拟氨氮废水为研究对象,采用序批式活性污泥法,研究了实时控制条件下短程生物脱氮的实现及稳定性。结果表明:控制硝化过程中pH在7.7~8.6、DO在0.35~0.80 mg/L,经过24 d的运行,曝气结束时出水主要以亚硝酸盐为主。在此基础之上,逐渐提高曝气量、降低进水pH,短程硝化并没有被破坏,亚硝化率依然维持在70%以上。过度曝气6 d之后,硝化类型由亚硝化率为90.7%的短程硝化转变为亚硝化率为40.7%的全程硝化。

关键词: 序批式间歇反应器, 短程硝化, 氨氮废水

CLC Number: 

• X703.1