摘要
在移动床生物膜反应器(MBBR)实现稳定短程硝化的前提下,采用模拟废水进行批式实验,研究生物膜短程硝化过程的基质抑制动力学特性及pH的影响。基于Haldane模型建立短程硝化基质抑制动力学方程,确定不同pH条件下的动力学常数。结果表明,不同pH条件下,高浓度氨氮对短程硝化的抑制特性均符合Haldane模型。pH为7.0、8.0和9.0时的氨氮最大比降解速率(qmax)分别为9.906、16.234、14.742mg/(g.h),pH=8.0是获得高效的短程硝化效果的适宜运行条件。但半亚硝化的实现则需要在氨氮降解速率适当降低的条件下(pH=7.0)才能实现。
The substrate inhibition kinetic characteristics of short-cut nitrification under different pH conditions were evaluated when the aerobic moving-bed biofilm reactor achieved a stable nitrite accumulation rate. Batch test with simulate wastewater was conducted and the kinetic equations for the different pH was established based on Haldane model. The results showed that Haldane model was able to represent the inhibitions caused by high concentrate ammo- nia during short-cut nitrification process under different pH. The maximal specific degrading rate (qmax) for per gram volatile suspended solids was calculated by Haldane model, when the pH value was 7.0,8.0 and 9.0, the obtained qmax was 9. 906,16. 234 and 14. 742 mg/(g · h), respectively. The pH of 8.0 was appropriate condition for short-cut nitri- fication, but not for the half partial nitrification. Appropriately reducing the ammonia decomposition rate could be ben- eficial to half partial nitrification,and pH 7.0 was the suitable condition for half partial nitrification.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2013年第6期65-68,共4页
Environmental Pollution & Control
基金
华东院科技项目开发专项(No.KY120209-05-06)
关键词
短程硝化
PH
抑制
动力学
short-cut nitrification
pH
inhibition
kinetics