|
KMID : 0380020080230010070
|
|
Korean Journal of Biotechnology and Bioengineering
2008 Volume.23 No. 1 p.70 ~ p.76
|
|
|
The Removal of Organics and Nutrients in an Anoxic/Oxic Process Using Surface-modified Media
|
|
Seon Yong-Ho
|
|
|
Abstract
|
|
|
|
Surface of hydrophobic media was modified to become hydrophilic by ion beam irradiation. Fixed bed biofilm reactors packed with or without surface modification were used to remove organics, nitrogen, and phosphorus from sewage. This system composed of anoxic/oxic cycles to increase the nutrient removal. A cylindrical polyethylene was used as a packing media in this study. With 12 hours of hydraulic retention time (HRT), the reactors with and without surface modification showed 95% and 92% removal, respectively. Both reactors showed over 95% removals for a longer HRT of 16 hours. Nitrogen removal ranged 54.8% to 70.2% for the surface modified system and 57.5% to 76.5% for the non-modified system under same condition. Finally, phosphorus removal ranged 59.4% to 69.8% for the surface modified system and 51.3% to 63.4% for the non-modified system under same condition. From this study organics and phosphorus were better removed in using surface modified media and vice versa for nitrogen removal.
|
|
|
KEYWORD
|
|
|
Surface-modified media, biofilm, sewage, organics, nutrients, HRT, anoxic/oxic process
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|