Simultaneous partial nitritation and anammox at low temperature with granular sludge

被引：246
作者：
Lotti, T. [1 ]
Kleerebezem, R. [1 ]
Hu, Z. [2 ]
Kartal, B. [2 ]
Jetten, M. S. M. [2 ]
van Loosdrecht, M. C. M. [1 ]
机构：
[1] Delft Univ Technol, Dept Biotechnol, NL-2628 BC Delft, Netherlands
[2] Radboud Univ Nijmegen, IWWR, Dept Microbiol, NL-6525 AJ Nijmegen, Netherlands
来源：
WATER RESEARCH | 2014年 / 66卷
关键词：
Anammox; Granular sludge; Low temperature; Nitratation/NOB suppression; Mainstream conditions; Autotrophic nitrogen removal; AUTOTROPHIC NITROGEN REMOVAL; PARTIAL NITRIFICATION; AMMONIUM OXIDATION; SEWAGE-TREATMENT; BACTERIA; REACTOR; ENRICHMENT; AERATION; EMISSION; SIZE;
D O I：
10.1016/j.watres.2014.07.047
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Autotrophic nitrogen removal in the main stream appears as a prerequisite for the implementation of energy autarchic wastewater treatment plants. To investigate autotrophic nitrogen removal a lab-scale gas-lift sequencing batch reactor with granular sludge was operated for more than 500 days. The reactor was operated at temperatures between 20 and 10 degrees C on autotrophic medium with ammonium (60 and 160 mg-N L-1) as only nitrogen compound at an HRT of 0.23-0.3 d. The dissolved oxygen (DO) concentration was shown to be an effective control parameter for the suppression of the undesired nitratation process. DO control guaranteed the effective suppression of the nitratation both at 20 and 15 degrees C, allowing nitrogen removal rates of 0.4 g-N-Tot L-1 d(-1) at nitrogen removal efficiencies of 85-75%. Prolonged operation at 10 degrees C caused a slow but unrestrainable decrease in anammox activity and process efficiency. This study represents a proof of concept for the application of the autotrophic nitrogen removal in a single reactor with granular sludge at main stream conditions. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：111 / 121
页数：11
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