NDLI: Study on nitrogen removal of simultaneous nitrification and denitrification in BAF

Content Provider	IEEE Xplore Digital Library
Author	Lv Jian Liu Shuo Liao Ri-hong Liu Cao Huang Yun-fang
Copyright Year	2011
Description	Author affiliation: Beijing Hydraulic Research Institute, China (Liao Ri-hong; Liu Cao; Huang Yun-fang) \|\| Beijing University of Technology, The College of Architecture, and Civil Engineering, China (Lv Jian; Liu Shuo)
Abstract	In order to meet the requirements of replenishment water in the section of the North Canal in Tong-zhou, Beijing, the experiment was carried out using pre-denitrification BAF and polyurethane filler. The factors of simultaneous nitrification and denitrification have been studied: gas-water ratio, reflux ratio, hydraulic loading and filter height. When the aerobic section of the gas-water ratio was 20∶1, the reactor possessed obvious feature of simultaneous nitrification and denitrification, with the total nitrogen removal ratio, of 82.96%, and its' concentration in the effluent less than the 10mg /L; When the reflux ratio was 1∶1, anoxic tank removal rate was 42.3%, while aerobic tank removal rate was 51.85%; When the hydraulic loading was $0.32m^{3}/(m^{2}$ ·h), the concentration and removal rate of TN in the effluent were 11mg/L and 76.67%, respectively, at which time simultaneous nitrogen removal rate of aerobic tank reached peak. Sampling along the layer in the aerobic area, the results showed that the total nitrogen removal mainly occurred at the bottom of the reactor ranging between 0 and 0.6m; when DO is between 1.5 and 2mg/L, the SND is obvious, and the TN removal rate remained above 80%. By simultaneously monitoring changes of ORP values along the layer, the ORP during the simultaneous nitrification and denitrification process can send control signal and respond stably and sensitively. According to the changes of ORP, the aeration area can be adjusted efficiently to save energy.
Starting Page	4499
Ending Page	4502
File Size	414636
Page Count	4
File Format	PDF
ISBN	9781457702891
e-ISBN	9781457702907
DOI	10.1109/ICETCE.2011.5776289
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Loading Effluents BAF Polyurethane filler Biology Simultaneous nitrification and denitrification Nitrogen Compounds ORP Inductors Monitoring
Content Type	Text
Resource Type	Article

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