移动床生物膜反应器同步硝化反硝化脱氮特性研究

为了研究同步硝化反硝化过程中的脱氮特性,采用移动床生物膜系统,在C/N比为12的条件下,分析了单个代表性周期内同步硝化反硝化过程中三氮和有机物降解规律。并研究了各技术参数对同步硝化反硝化脱氮性能的影响.结果表明,在移动床生物膜中实现了同步硝化反硝化现象。脱氮效率达到90%;考察了反应过程中ρ(DO)、氧化还原电位V(ORP)、pH值和碱度等技术参数的变化规律,建立了这些参数与同步硝化反硝化中各污染物指标间的关系.同时对比研究了理论碱度和试验过程中实际碱度间的关系,发现在移动床生物膜反应器中,同步反硝化作用产生的碱度可以补充硝化作用消耗的碱度,反应过程中不必再补充碱度.

Denitrifying Characters Study Using Simutaneous Nitrification and Denitrification in Moving-bed Biofilm Reactor

The preent artitle aims to study the denitrifying alaracter of simultaneous nitrification and denitrification (SND).Under the condition that C/N ratio was 12,this paper analyzed the regularities of triple-nitrogen and organic matter degradation in the process of simultaneous nitrification and denitrification during a single representative period,and studied the effect of technical parameters on the performance of denitrification in moving-bed biofilm reactor(MBBR).The results show that the phenomenon of simultaneous nitrification and denitrification take place in the moving-bed biofilm reactor(MBBR), denitrification effect is excellent,and the removal efficiency of TN is 90%.The change law ofρ(DO), oxidation-reduction potential (ORP),pH and alkalinity during the reaction course were investigated,and the relationship between the parameters and contaminants was established.Meanwhile,the thesis studied comparatively the relation between simulation alkalinity and practical alkalinity during experiment.The results show that,in the moving-bed biofilm reactor (MBBR),alkalinity which is produced by effect of simultaneous denitrification can supplement consumptive alkalinity of nitrification,and therefore alkalinity needn't to be supplemented in the process.