Preparation of Modified Zeolite Ammonia Nitrogen Adsorbent and Its Application in Domestic Sewage Treatment

Abstract

Abstract: In order to solve the problem of excessive ammonia nitrogen in the drainage of conventional sewage treatment process in some areas, through the preparation of modified zeolite ammonia nitrogen adsorbent, combined with adsorption experiment, characterization analysis and pilot test, the performance of the modified zeolite ammonia nitrogen adsorbent for the removal of ammonia nitrogen from municipal domestic sewage was deeply studied and the optimum preparation process and removal characteristics of the modified zeolite ammonia nitrogen adsorbent were investigated. The results show that the modified zeolite ammonia nitrogen adsorbent has more sodium zeolite and pore channels, and the removal rate and adsorption amount of ammonia nitrogen reach 83.51% and 0.840 mg/g respectively at NaCl concentration of 1.5 mol/L, stirring time of 3 h and heating temperature of 75 ℃. The pilot test results show that the content of ammonia nitrogen in the water filtered by modified zeolite ammonia nitrogen adsorbent is stable below 2.0 mg/L, and the adsorbent can be recycled and reused. This study can provide theoretical basis for ammonia nitrogen treatment of municipal domestic sewage.

Key words: modified zeolite, ammonia nitrogen adsorbent, pilot test, municipal domestic sewage

CLC Number:

FU Jinxiang, ZHANG Yanping, LI Sen, YOU Kun, FAN Donghan, LI Xin. Preparation of Modified Zeolite Ammonia Nitrogen Adsorbent and Its Application in Domestic Sewage Treatment[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1728-1734.

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