Experiment Study on Ammonium Removal in the Initial Roof Rainwater by the Bio-zeolites Enhanced Biofilm Formation Through Signal Molecules

ZHANG Jing; WEI Jia; ZHANG Kai; ZHOU Rongxuan; HAN Hao; WANG Jia; LI Jun; WANG Changwen

doi:10.11936/bjutxb2019070015

Journal of Beijing University of Technology > 2020 > 46(4): 338-345. > DOI: 10.11936/bjutxb2019070015

ZHANG Jing, WEI Jia, ZHANG Kai, ZHOU Rongxuan, HAN Hao, WANG Jia, LI Jun, WANG Changwen. Experiment Study on Ammonium Removal in the Initial Roof Rainwater by the Bio-zeolites Enhanced Biofilm Formation Through Signal Molecules[J]. Journal of Beijing University of Technology, 2020, 46(4): 338-345. DOI: 10.11936/bjutxb2019070015

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Experiment Study on Ammonium Removal in the Initial Roof Rainwater by the Bio-zeolites Enhanced Biofilm Formation Through Signal Molecules

1.
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
2.
School of City and Architectural Engineering, Zaozhuang University, Zaozhuang 277100, Shandong, China

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Received Date: July 15, 2019
Available Online: August 03, 2022
Published Date: April 09, 2020

Graphical Abstract

Abstract

Abstract

To improve the adhesion performance of nitrifying bacteria and denitrifying bacteria on zeolites surface and achieve the purpose of efficient removal of ammonium in initial roof rainwater and prolonging the service life of bio-zeolites, experiments of strengthening bio-zeolites formation by acyl-homoserine lactone (AHLs) were carried out. Results show that the adhesion abilities of nitrifying bacteria WGX5 and WGX13 are improved obviously when 2.0 μmol/L C12-HSL is added (The attachment biomass of WGX5 and WGX13 increases by 89% and 94%, respectively). However, the adhesion abilities of denitrifying bacteria HF2 and HF8 were not improved obviously compared with nitrifying bacteria. When the ratio of carbon to nitrogen is 4, and 2.0 μmol/L C12-HSL was added, the adhesion abilities of denitrifying bacteria HF2 and HF8 were improved obviously, and the attachment biomass of HF2 and HF8 increases by 1.3 times and 1.6 times, respectively. The bio-zeolites prepared under the conditions can effectively remove the ammonium in the initial roof rainwater in a long term (the removal efficiency of ammonium in 5 rounds of experiments is as high as 91%-98%). Moreover, the chemical oxygen demand (COD) in the initial roof rainwater is removed partially (the removal efficiency of COD in 5 rounds of experiments reaches 61%-70%). In addition, the in-situ regeneration efficiency of the bio-zeolite enhanced biofilm formation increases from 34% to 83%, thus, the service life of the zeolite is prolonged effectively. In the 5 rounds of experiments, the bio-zeolite enhanced biofilm formation can effectively removed the ammonium from the roof rainwater.
- bio-zeolite,
- signal molecules,
- initial roof rainwater,
- ammonium removal,
- in-situ regeneration,
- microbial attachment

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References (26)

References

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Experiment Study on Ammonium Removal in the Initial Roof Rainwater by the Bio-zeolites Enhanced Biofilm Formation Through Signal Molecules