摘要
采用MBBR工艺对微污染黄埔江原水硝化过程动力学和反应器动力学进行了研究.采用考虑最小基质质量浓度的M ichaelis-Menten方程,氨氮去除速率方程为N=1 879(S-0.08)/(S+1.52),各动力学参数分别为:最大氨氮去除速率Nmax为1 879 mg/(m2.d);半速率常数Ks为1.6 mg/L;最小基质氨氮质量浓度为0.08 mg/L;最大细胞比增长速率μmax为1.05 d-1.试验表明,MBBR反应器为典型的完全混合反应器,结合硝化反应动力学,建立了完全混合式原水生物预处理硝化反应器动态模拟模型.通过模型计算与实际中试运行效果比较可以得出:在低进水氨氮质量浓度条件下,模型计算值与实验数据略有差别;在中高进水氨氮质量浓度条件下,模型计算值与实验结果较为一致.模型较好地反应了工艺硝化的过程,可方便地应用于工艺的控制和管理.
The nitrifying and reactor kinetics of raw water nitrification in biological pretreatment of micro-polluted water from Huangpu River by MBBR technology was studied. According to the equation of Michaelis Menten, taking the minimum ammonia nitrogen concentration into consideration, the relationship between am- monia nitrogen concentrations and ammonia nitrogen removal rates could be presented as N = 1 879 （S - 0. 08 ）/（ S ＋ 1.52 ）. Four nitrification kinetics parameters could be directly or indirectly obtained by the measurements of the reactor system, including the minimum ammonia nitrogen concentration, the half saturation constant, the maximum ammonia removal rate and the maximum specific bacterial growth rate. For the experimental conditions, the parameters were determined to be 0. 08 mg/L, 1.6 mg/L, 1 859 mg/（ m^2 · d） and 1.48 d ^-1, respectively. It can be drawn that the MBBR belongs to the CSTR and considering the nitrifying kinetics the nitrification dynamic simulation model of this type of reactor was built. The validity of this model was testified by the pilot-scale experiment of Huangpu river raw water bio-pretreatment by MBBR technology. Comparing the calculation results of the model with the results of experiment, the conclusion could be drawn ： the higher the concentration of ammonia nitrogen in raw water is, the less the difference between the model and the experiment is. As a matter of fact, the results of this model are very close to the experiments; and it can be used to manage and control the practical operation of this technology effectively.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2006年第5期735-739,共5页
Journal of Harbin Institute of Technology
基金
国家高技术研究发展计划资助项目(2002AA601130)
国家科技攻关计划重大资助项目(2003BA808A17)
关键词
硝化
动态模拟
生物预处理
MBBR
nitrification
dynamic simulation model
biological pretreatment
MBBR
