摘要
按照生物膜反应—扩散模型理论建立了微污染原水生物预处理过程中的硝化反应时溶解氧为硝化反应动力学模型,推导出在温度适宜和碱度充分的条件下,当SNH+4-N>0.27SO2时氨氮为硝化反应的限制条件,从而建立了完全混合式反应器的限制条件;当SNH+4-N<0.27SO2的硝化动力学方程,并结合黄浦江原水预处理的中试进行了模型验证。通过比较发现:在进水氨氮浓度较低的条件下,模型计算值与试验数据有较大的出入;在进水氨氮浓度较高的条件下,模型计算值与试验结果较为一致。
The nitrifying kinetic model was built up in bio-pretreatment of micro-polluted raw water based on the theory of biofilm reaction - diffusion model. From the model it was derived that under suitable temperature and sufficient alkalinity,if SNH+4-N>0.27SO2 dissolved oxygen was the limiting condition of nitrification and if SNH+4-N<0.27SO2ammonia nitrogen was the limiting condition of nitrification, and thus establishing the nitrifying kinetic equation of CSTR. The validity of this model was verified by the pilot-scale test for pretreatment of raw water from Huangpujiang River. By making comparison between the model calculation value and test data, it was found that there is more disparity between them at lower concentration of in influent; and they are consistent with each other at higher concentration.
出处
《中国给水排水》
CAS
CSCD
北大核心
2003年第4期15-18,共4页
China Water & Wastewater
关键词
生物预处理
徽污染原水
硝化
动力学
bio-pretreatment
micro-polluted raw water
nitrification
kinetic
