title: Performance of anammox UASB reactor treating low strength wastewater under moderate and low temperatures.
abstract: An integrated approach to enhance and maintain high anammox activity and abundance in an upflow anaerobic sludge blanket (UASB) treating low strength wastewater under moderate and low temperatures was developed. A quantitative PCR assay showed the abandance of anammox bacteria to be 1.68±0.08×10(9) copies/ml in mixed liquor when the temperature was 30 °C and was maintained at the level of 1.93±0.41×10(9) copies/ml in mixed liquor at 16 °C. A nitrogen removal rate (NRR) of up to 5.72 kg N/m3/d was achieved with a hydraulic retention time (HRT) of 0.12 h at 30 °C, while nitrite and ammonium removal efficiencies were 94.35% and 92.81%, respectively. NRR decreased with a decrease in temperature and was maintained at 2.28 kg N/m3/d with an HRT of 0.28 h when at 16 °C, while nitrite and ammonium removal efficiencies were 92.31% and 78.45%, respectively. The emission rate of the greenhouse gas N2O was below 0.006% of the NRR in the anammox UASB reactor treating low strength wastewater.
authors: Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China. mady7802@163.com
authors: Bin
authors: B
authors: Ma
authors: Yongzhen
authors: Y
authors: Peng
authors: Shujun
authors: S
authors: Zhang
authors: Junmin
authors: J
authors: Wang
authors: Yiping
authors: Y
authors: Gan
authors: Jiang
authors: J
authors: Chang
authors: Shuying
authors: S
authors: Wang
authors: Shanyun
authors: S
authors: Wang
authors: Guibing
authors: G
authors: Zhu
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism*; D013696:Temperature; D062065:Wastewater / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D000641:Ammonia; D009584:Nitrogen; D062065:Wastewater; D014874:Water Pollutants, Chemical