ORIGINAL RESEARCH
Initial Start-up Characteristics of Anaerobic Ammonium Oxidation in a UASB Reactor
Huiyu Cheng 1,   Yunan Yan 1,   Xiang Yi 1,   Jing Wang 2,   Wenlai Xu 1, 3  
,   Haisong Nie 3  
 
More details
Hide details
1
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu , China
2
Sichuan Shutong Geotechnical Engineering Company-Water Resources and Environmental Engineering Company, Chengdu, China
3
Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan
CORRESPONDING AUTHOR
Wenlai Xu   

State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China, China
Submission date: 2019-06-03
Final revision date: 2019-07-25
Acceptance date: 2019-07-25
Online publication date: 2020-02-05
Publication date: 2020-03-31
 
Pol. J. Environ. Stud. 2020;29(3):2081–2089
 
KEYWORDS
TOPICS
ABSTRACT
Anammox (anaerobic ammonium oxidation) is a promising technology to remove nitrogen from wastewater, but the long start-up time limits its practical application. This study used an up-flow anaerobic sludge bed (UASB) reactor, selected anaerobic granular sludge as inoculating sludge, and maintained pH (7.8-8.2), temperature (30-35°C), and DO (≤0.5 mg L-1) to start an anammox process. The initial start-up process occurred in three stages: cell lysis phase, activity lag phase, activity elevation phase. In the cell lysis (1-2 d) and activity lag (3-4 d) phases, denitrification was the main reaction and TN removal rates were 36.72% and 52.34%, respectively. In the activity elevation phase (5-30 d), denitrification weakened, anammox activity strengthened, NH4+-N removal rate was increased greatly, NO2--N removal rate took on the trend of increasing at first and decreasing later, and the average removal rate of TN rose to 74.33% and reached the maximum rate of 81.91%. The variations of sludge bed in the cell lysis phase and activity lag phase were not obvious; but in the activity elevation phase, the sludge bed gradually varied from the bottom to the top, and the color of the sludge changed from black to brown, and a little sludge was red.
eISSN:2083-5906
ISSN:1230-1485