Development of a continuous single tank nitrification-denitrification process

连续单槽硝化反硝化工艺的开发

基本信息

批准号：
07455210
负责人：
TSUNO Hiroshi
金额：
$ 3.65万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

Continuous single tank nitrification-denitrification process was developed to overcome the lssues pointed out in the conventional nitrogen removal processes. Drafttube type reactor was applied to sewage treatment and operational and design parameters of this reactor were examined. Ability of aerobic denitrifier is utilized was also examined.Empirical equations on velocity of circulating flow and K_La in the draft-tube type reactor are constructed both experimentally and theoretically. Based on the results, continuous sewage treatment was performed. The results showed that 70-75% TN removal efficiency can be obtained in this reactor. It was also found that both aerobic zone ratio and anoxic zone ratio are necessary to be kept more than 0.35 to obtain more than 80% of both nitrification and denitrification ratio. C / N ratio in the influent is necessary to be kept about 3 (mg C / mgN). The ratio of draft tube diameter to reactor diameter (D_1 / D_0) influences TN removal efficiency. In the reactor which has effective depth of 4m, more than 70% TN can be removed only when D_1 / D_0 is 0.19. Analysis of DO decreasing rate in the annulus part shows that the higher effective depth of the reactor is, the easier both aerobic and anoxic zone can be created. Operational and designed parameters for nitrogen removal in the draft tube type reactor were examined extnsively by using the mathematical model.A selective determination method of the aerobic denitrifier in the mixed liquor is developed with immuno assay. Examination by using the mathematical model shows that the ratio of aerobic denitrifier increased in the mixed liquor by increasing BODMLSS loading rate.

开发了连续的单坦克硝酸化 - 否认过程，以克服常规氮去除过程中指出的LSSUS。检查了Draftube型反应器对污水处理，并检查了该反应器的操作和设计参数。还检查了有氧运动剂的能力。在实验和理论上构建了循环流速度的经验方程和循环流动速度的经验方程。根据结果，进行了连续的污水处理。结果表明，在该反应器中可以获得70-75％的TN去除效率。还发现有氧区比和缺氧区比都必须保持超过0.35，以获得超过80％的硝化和反硝化比。进水中必须保持大约3（mg c / mgn）。管道直径与反应器直径（D_1 / D_0）的比率影响TN去除效率。在有效深度为4M的反应器中，只有在D_1 / D_0为0.19时，才能除去70％以上的TN。对环部分中DO降低速率的分析表明，反应器的有效深度较高，有氧和缺氧区域都更易于。通过使用数学模型进行了广泛的测定方法，以通过免疫分析开发了有氧塑料的选择性确定方法，从而进行了操作和设计的参数。通过使用数学模型的检查表明，混合酒中有氧运动液的比率通过提高BODMLSS的加载速率增加。