Carbon Dioxide Injection Method for Enhancing Hydrogenotrophic Denitrification of Secondary Wastewater Effluent in Fixed Bed Reactor

Title
Carbon Dioxide Injection Method for Enhancing Hydrogenotrophic Denitrification of Secondary Wastewater Effluent in Fixed Bed Reactor
Authors
박기영맹승규안규홍이광형최오경이재우
Keywords
hydrogenotrophic denitrification; fixed bed reactor (FBR); carbon dioxide; periodic injection; nitrite accumulation; pH
Issue Date
2013-04
Publisher
Biotechnology and bioprocess engineering
Citation
VOL 18, NO 2, 326-332
Abstract
This study presents an optimal injection method for using carbon dioxide as a carbon source for the hydrogenotrophic denitrification of secondary wastewater effluent in a laboratory-scale fixed bed reactor (FBR). The FBR was operated under three conditions: a continuous CO2 supply, periodic CO2 supply, and without a CO2 supply. The continuous operation of the FBR without carbon dioxide injection resulted in an increase in pH to 10 and a noticeable level of nitrite accumulation. The continuous co-injection of carbon dioxide and hydrogen gas decreased the pH to a range of 6 ∼ 8, but the denitrification efficiency decreased to 29%. The co-injection of carbon dioxide decreased the maximum dissolved hydrogen concentration and hydrogen mass transfer rate by 25 and 61%, respectively. Compared to the continuous injection method, a periodic injection of carbon dioxide increased the denitrification efficiency from 28.6 to 85% as the hydrogen flow rate and hydraulic retention time (HRT) increased. With the periodic injection of carbon dioxide, the nitrite accumulation appeared to be insignificant as the hydrogen flow rate increased.
URI
http://pubs.kist.re.kr/handle/201004/46875
ISSN
12268372
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE