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Rice Husk as Carbon Source and Biofilm Carrier for Water Denitrification.
- Source :
-
Polish Journal of Environmental Studies . 2009, Vol. 18 Issue 4, p693-699. 7p. 1 Diagram, 2 Charts, 4 Graphs. - Publication Year :
- 2009
-
Abstract
- We investigated rice husk as the sole carbon source as well as biofilm carrier in the biological denitrification of wastewater in up-flow laboratory reactors. Fast startup of the reactor and high nitrate removal efficiency was observed. The highest denitrification rate (about 0.096kg/m3·d) was achieved when flow rate and nitrate concentration were 41.4L/d and 25.0mg/L, respectively. Flow rate and nitrate concentration of the influent were observed to have a significant effect on nitrate removal efficiency. The reactor had the ability to accommodate a wide range of pH (6.5-8.5) and DO (1.5-4mg/L). A time-dependent decrease in nitrate removal efficiency was observed after 72 days of operation. And the addition of new rice husk brought about a rapid increase of nitrate removal efficiency. Results showed that rice husks can be an economical and effective carbon source for the nitrate removal process. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RICE hulls
*BIOFILMS
*DENITRIFICATION
*CHEMICAL reduction
*NITRIFICATION
Subjects
Details
- Language :
- English
- ISSN :
- 12301485
- Volume :
- 18
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Polish Journal of Environmental Studies
- Publication Type :
- Academic Journal
- Accession number :
- 43979524