Volume 8 Issue 3
May  2018
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Article Navigation >  Journal of Environmental Engineering Technology  > 2018  >  8(3): 274-281
HU Jiejun, DONG Jing, SHEN Zhiqiang, ZHOU Yuexi, CHEN Xuemin, FU Xiaoyong. Nitrification performance for secondary effluent from MWTP using bio-zeolite constructed wetland[J]. Journal of Environmental Engineering Technology, 2018, 8(3): 274-281. doi: 10.3969/j.issn.1674-991X.2018.03.036
Citation: HU Jiejun, DONG Jing, SHEN Zhiqiang, ZHOU Yuexi, CHEN Xuemin, FU Xiaoyong. Nitrification performance for secondary effluent from MWTP using bio-zeolite constructed wetland[J]. Journal of Environmental Engineering Technology, 2018, 8(3): 274-281. doi: 10.3969/j.issn.1674-991X.2018.03.036
shu

Nitrification performance for secondary effluent from MWTP using bio-zeolite constructed wetland

doi: 10.3969/j.issn.1674-991X.2018.03.036

  • 1. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

  • 2. Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

  • 3. Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China

  • 4. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012

More Information
  • Corresponding author: Yuexi ZHOU E-mail: zhouyuexi@263.net
  • Received Date: 2017-12-14
  • Publish Date: 2018-05-20
    Abstract
  • The bio-zeolite constructed wetland (CW) pilot plant receiving a real secondary effluent of the municipal wastewater treatment plant(WWTP) was set up. The performance of bio-zeolite CW enhancing the nitrification of the WWTP secondary effluent and the effect of temperature on nitrification rate were explored during 273 days. The results indicated that the N H 4 + from secondary effluent was removed rapidly and effectively. Average removal rate of N H 4 + was 90.5% and the concentration of N H 4 + in the effluent was lower than 0.5 mg/L in the normal operation phase. After a short recovery period of 12 days, the average removal rate of N H 4 + was higher than 70%. The average removal rate of N H 4 + still remained at a relative high level as 67.6% in the low temperature stage (below 13 ℃). The temperature had signi?cant impact on the nitrification, and the average nitrification rate increased from 28% to 62% as the water temperature rose slowly from below 15 ℃ to above 25 ℃ in bio-zeolite CW. No obvious accumulation of nitrite nitrogen was found in the effluent of bio-zeolite CW except the low temperature stage, and the average concentration of nitrite nitrogen in the effluent was 0.16 mg/L. N H 4 + was mainly nitrified by microorganisms and transformed into nitrate.

     

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