Initial Start-up Characteristics of Anaerobic
Ammonium Oxidation in a UASB Reactor

Cheng, Huiyu; Yan, Yongtie; Yi, Xiang; Wang, Jing; Xu, Wangli; Nie, Haisong

doi:10.15244/pjoes/111317

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Furthermore, it also decreases the operation cost of pumps for returned sludge. Studies about the running processes, reaction mechanisms, biochemical reaction model, online control and bacterial communities in a CIBR have already been conducted in recent years [8][9][10][11]. However, in regards to the actual operation of CIBR, there are few questions sought to be settled, such as dead-zones and the low separation efficiency of gas-liquid-solid in the three-phase separator.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of the Flow Patterns and Structure Optimization within a Continued-Flow Integrated Biological Reactor

Lu¹,

Zhong²,

Cai³

et al. 2022

Pol. J. Environ. Stud.

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The fluid patterns and structure optimization of a novel continued-flow integrated biological reactor (CIBR) were explored by using the computational fluid dynamics (CFD). The results of the CFD simulation revealed that both the liquid velocity field and the gas volume fraction in the CIBR showed an axisymmetric spatial distribution. Furthermore, increasing the aperture sizes of below diversion holes from 2 cm to 8 cm could significantly enhance the turbulent kinetic energy of three-phase separation zone. Consequently, the solid-liquid separation and the treatment efficiency of CIBR were enhanced. In addition, an increase in the angle of the inclined plate (from 35° to 45° and further to 50°) caused increases in the liquid velocity, volatility and gas holdup in the threephase separation zone, while decreased gradually in the settling zone. These changes improved gasliquid separation in the three-phase separation zone and the sludge sedimentation in the settling zone. The findings of the study provide an insight into the fluid characteristics of gas-liquid-solid three phases within the CIBR.

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Section: Introductionmentioning

confidence: 99%