Growth competition between ammonia-oxidizing archaea and bacteria for ammonium and urea in a biological activated carbon filter used for drinking water treatment

2019 ◽  
Vol 5 (2) ◽  
pp. 231-238 ◽  
Author(s):  
Jia Niu ◽  
Ikuro Kasuga ◽  
Futoshi Kurisu ◽  
Hiroaki Furumai
Keyword(s):  
Time Course ◽  
Drinking Water Treatment ◽  
Niche Separation ◽  
Autotrophic Growth ◽  
Biological Activated Carbon ◽  
Ammonia Oxidizing Archaea ◽  
Activated Carbon Filter ◽  
Growth Activity ◽  
Biological Activated Carbon Filter ◽  
Carbon Filter

By applying time-course DNA-SIP, the substrate niche separation of AOA and AOB was revealed. AOA had higher autotrophic growth activity for a low concentration of ammonium, while AOB directly incorporated and hydrolyzed urea.

Backwashing Effect on Stabilization of Immobilized Bacteria on Biological Activated Carbon Filter

2011 ◽  
Vol 183-185 ◽  
pp. 338-342 ◽  
Author(s):  
Yu Nan Gao ◽  
Jin Xiang Fu ◽  
Shui Liu
Keyword(s):  
Activated Carbon ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Biological Activated Carbon ◽  
Start Up ◽  
Activated Carbon Filter ◽  
Gradient Gel Electrophoresis ◽  
Biomass Loss ◽  
Biological Activated Carbon Filter ◽  
Carbon Filter ◽  
Stabilization Period

Six dominant microorganisms including four kinds of Pseudomonas and two kinds of Bacillus were isolated from substrate sludge for improving the organic substance removal ability for the biological activated carbon filter (BAC). This paper examines the backwashing effect on the stabilization of these six microorganisms immobilized on the filter. The results showed the backwashing had more impact on bacteria stabilization of BAC filter during start-up period than the stabilization period. The biomass loss was 28.57% during the start-up period more than the stabilization period which biomass loss was 11.76%. The Scan Electron Microscope (SEM) and Denaturing Gradient Gel Electrophoresis of Polymerase Chain Reaction amplified 16S rRNA (PCR-DGGE) photos showed that the ecology of the population did not change with the operation. The biomass of dominant microorganism after air-water scour backwashing decreased during the start-up period and retained stability during long term performance.

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