沸石吸附及其固定化微生物间歇式活性污泥法同时硝化反硝化脱氮的研究

摘要

以2种粒径(＜0.25 mm和0.2～1.0 mm)的天然沸石为实验材料,进行沸石吸附NH4+实验以及吸附饱和后固定化微生物间歇式活性污泥法(SBR)同时硝化反硝化(SND)脱氮实验.结果表明,实验沸石对NH4+的吸附等温线符合Langmuir吸附模型,小粒径天然沸石吸附NH4+效率较高.将小粒径天然沸石投加到SBR反应器中,与平行实验的SBR反应器相比发现,天然沸石在再生的同时能够增强SBR反应器的脱氮效率.%Two types of Baiyin clinoptilolit zeolite, with diameters of ＜0. 25 mm and 0. 2-1. 0 mm,were selected as absorbent for the adsorption of NH+4 -N in solution. The models of adsorption equilibria and kinetic were established base on the experimental data. Saturated zeolite was added in sequencing batch reactor (SBR) to enhance the denitrification of SBR through simultaneous nitrification and denitrification (SNR). Results showed that NH+4-N adsorption isotherm could be well fitted by Langmuir models the natural zeolite with smaller diameter presented better adsorption capacity. Compared with the traditional SBR process, adding ammonium saturated zeolite could greatly improve the denitrification efficiency of SBR;the bioregeneration of saturated zeolite was also achieved through SNR process.