Journal
BIORESOURCE TECHNOLOGY
Volume 241, Issue -, Pages 473-481Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.05.151
Keywords
Ammonium; Partial nitrification; BAF; Zeolite; Free ammonia; High-throughput sequencing
Funding
- Specialized Applied Technology Research and Development (major) of Guangdong Province [2015B020235013]
- Emergency Management Program, Natural Science Foundation of China [21646008]
- project of Guangzhou Pearl River Science and Technology New Star [201610010069, 201710010181]
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A zeolite biological aerated filter (ZBAF) with continuous feeding was successfully applied for achieving stable partial nitrification. Excellent nitrite accumulation (higher than 98.0%) and high nitrite/nitrate production rate (NPR) (approximately 0.760 kg/m(3)/d) were obtained with increase influent ammonium concentration from 250 to 550 mg/L within a nitrogen loading rate (NLR) of 0.854-1.200 kg/m(3)/d. Owning to the adsorption of zeolite to ammonium, free ammonia (FA) concentration could remain at an appropriate range for inhibition of nitrite oxidizing bacteria (NOB) and dominance of ammonia-oxidizing bacteria (AOB), which should be responsible for the excellent partial nitrification realized in ZBAF. Kinetic study showed that the production of nitrite in ZBAF followed the zero-order kinetics model and highthroughput sequencing analysis further presented the enrichment of AOB and inhibition of NOB in ZBAF. All the results demonstrated that ZBAF hold a great potential in the application of partial nitrification for ammonium wastewater treatment. (C) 2017 Elsevier Ltd. All rights reserved.
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