The metabolic process of aerobic granular sludge treating piggery wastewater: Microbial community, denitrification genes and mathematical model calculation

2021 ◽  
Vol 9 (4) ◽  
pp. 105392
Author(s):  
Xueping Tian ◽  
Jingtao Zhao ◽  
Jun Huang ◽  
Guoke Chen ◽  
Yonggui Zhao
Keyword(s):  
Mathematical Model ◽  
Microbial Community ◽  
Model Calculation ◽  
Granular Sludge ◽  
Metabolic Process ◽  
Aerobic Granular Sludge ◽  
Piggery Wastewater ◽  
Denitrification Genes

Three-dimensional multi-species mathematical model of the aerobic granulation process based on cellular automata theory

2018 ◽  
Vol 77 (12) ◽  
pp. 2761-2771
Author(s):  
Guoqiang Zheng ◽  
Kuizu Su ◽  
Shuai Zhang ◽  
Yulan Wang ◽  
Weihong Wang
Keyword(s):  
Mathematical Model ◽  
Spatial Distribution ◽  
Cellular Automata ◽  
Three Dimensional ◽  
Granular Sludge ◽  
Automata Theory ◽  
Aerobic Granular Sludge ◽  
Granulation Process ◽  
Autotrophic Bacteria ◽  
Degrading Bacteria

Abstract Aerobic granular sludge is a kind of microbial polymer formed by self-immobilization under aerobic conditions. It has been widely studied because of its promising application in wastewater treatment. However, the granulation process of aerobic sludge is still a key factor affecting its practical application. In this paper, a three-dimensional (3D) multi-species mathematical model of aerobic granular sludge was constructed using the cellular automata (CA) theory. The growth process of aerobic granular sludge and its spatial distribution of microorganisms were studied under different conditions. The simulation results show that the aerobic granules were smaller under high shear stress and that the autotrophic bacterial content of the granular sludge interior was higher. However, the higher the dissolved oxygen concentration, the larger the size of granular sludge and the higher the content of autotrophic bacteria in the interior of the granular sludge. In addition, inhibition of toxic substances made the aerobic granule size increase more slowly, and the spatial distribution of the autotrophic bacteria and the toxic-substance-degrading bacteria were mainly located in the outer layer, with the heterotrophic bacteria mainly existing in the interior of the granular sludge.

Effect of chromium (VI) on the multiple nitrogen removal pathways and microbial community of aerobic granular sludge

2017 ◽  
Vol 39 (13) ◽  
pp. 1682-1696 ◽  
Author(s):  
Xiao-ying Zheng ◽  
Dan Lu ◽  
Ming-yang Wang ◽  
Wei Chen ◽  
Gan Zhou ◽  
...  
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Chromium Vi
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