期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 13, 页码 6801-6807出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.04.011
关键词
Wastewater treatment; Nitrogen removal; Partial nitrification; Microbial community structure; Anammox
资金
- New Energy and Industrial Technology Development Organization (NEDO), Japan
- Japan Science and Technology Agency (JST), CREST
- Grants-in-Aid for Scientific Research [11J04128] Funding Source: KAKEN
The partial nitrification reactor was successfully started up and operated stably for more than 250 days with a maximum nitrite production rate of 1.12 kg-N m(-3) day(-1). The important factors for successful partial nitrification were high ammonium loading rate (>1.0 kg-N m(-3) day(-1)) and relatively high pH (ca. 8.0), giving high free ammonia concentrations (>10 mg NH3-N L-1). In addition, the air flow rate must be controlled at the ratio of air flow rate to ammonium loading rate below 0.1 (m(air)(3) day(-1))/(kg-N m(-3) day(-1)). After the establishment of stable partial nitrification, the effluent NO2--N/NH4+-N ratio and effluent NO3--N concentration were 1.20 +/- 0.33 and 1.2 +/- 1.0 mg-N L-1, respectively, which was then fed into an granular-sludge anammox reactor. Consistent nitrogen removal was achieved for more than 250 days with a maximum nitrogen removal rate of 15.0 kg-TN m(-3) day(-1). (C) 2011 Elsevier Ltd. All rights reserved.
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