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Effect of superficial gas velocity and ratio of bed volume to reactor volume of inverse fluidized bed biofilm reactor on the removal of ammonia-nitrogen from wastewater

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Title Effect of superficial gas velocity and ratio of bed volume to reactor volume of inverse fluidized bed biofilm reactor on the removal of ammonia-nitrogen from wastewater
 
Creator Swain, Anup Kumar
Sahoo, Abanti
Jena, Hara Mohan
Bhuyan, Satish Chandra
 
Subject Ammonia-nitrogen
Biofilm reactor
Inverse fluidization
Nitrification
Wastewater treatment
 
Description 709-716
Hydrodynamic parameters of an inverse fluidized bed biofilm reactor (IFBBR) have been studied using spherical
polypropylene (PP) particles having average diameter and density of 5.63 mm and 920 kg/m3 respectively. Gas-phase
holdup (g) was analyzed for various ratios of settled bed volume to reactor volume (Vb/Vr) and superficial gas velocities
(Ug) with a liquid recirculation velocity (Ul) of 0.0021 m/s. The g values were found to increase with Vb/Vr ratios up to a
certain limit and then decrease with further increase of Vb/Vr ratios. The effect of Ug, Vb/Vr ratios, and initial concentration
of ammonia-nitrogen (NH4
+-N) on the removal of NH4
+-N from synthetic wastewater were studied. The optimal values of
Vb/Vr ratio and Ug were found to be 0.380 and 0.0085 m/s respectively for all initial NH4
+-N concentrations. Complete
removal of NH4
+-N was achieved in 8 to 44 hours for different initial NH4
+-N concentrations. It was also observed that with
the increase in initial NH4
+-N concentrations, the nitrification decreases.
 
Date 2022-02-02T11:42:46Z
2022-02-02T11:42:46Z
2021-11
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscair.res.in/handle/123456789/59050
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.28(6) [November 2021]