Investigation of Characteristics and Mechanism for Removal of Ammonia by a Suspended Medium-zeolite Biological Aerated Filter

Abstract

This paper aimed to investigate characteristics and mechanism of the suspended medium-zeolite biological aerated filter (SZBAF) in micro-polluting source water ammonia removing and provide a reference for SZBAF optimization. Different ammonia concentration of raw water (about 2 mg/l and about 4 mg/l) and different zeolite size (1-3mm and 3-5mm) were investigated. Results showed different environment could change the ammonia removing mechanism and microbial community. Higher ammonia loading was beneficial to nitrobacteria proliferation and could enhance nitrification performance. Otherwise, smaller grain size was beneficial to adsorbing ability.