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

Indian Journal of Chemical Technology

article

Anup Kumar Swain¹  Abanti Sahoo¹  Hara Mohan Jena¹  Satish Chandra Bhuyan¹ 

[1] Chemical Engineering Department, National Institute of Technology

关键词: Ammonia-nitrogen;    Biofilm reactor;    Inverse fluidization;    Nitrification;    Wastewater treatment;    Article;   

学科分类：化学（综合）

来源: National Institute of Science Communication and Information Resources

【 摘 要 】

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.

【 授权许可】

CC BY-NC-ND