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Comparison of the Effects of Conventional and Alternative External Carbon Sources for Enhancing of the Denitrification Process
Abstract
Food industry effluents are considered a potential alternative for methanol when seeking external carbon sources to enhance denitrification in municipal wastewater treatment plants (WWTPs). The aim of this study was to determine the immediate effects of dosing different carbon sources on the denitrification capability of process biomass from the "Wschod" WWTP in Gdansk (northern Poland). Five carbon sources, including settled wastewater, methanol and three industrial effluents (distillery, brewery and fish-pickling process) were tested in two kinds of batch experiments. The acclimation period of biomass to methanol was also investigated in bench scale systems. During the "conventional" batch experiments with the industrial effluents the observed nitrate utilization rates (NURs) ranged from 2.4 to 6.0 g N/(kg VSS•h), which were only slightly lower than the rates associated with utilization of readily biodegradable fraction in the municipal (settled) wastewater (4.6-7.8 g N/(kg VSS•h)). The "conventional" NURs observed with methanol and non-acclimated process biomass were very low, i.e. 0.4-1.5 g N/(kg VSS•h), and a minimum two week acclimation period of biomass to methanol in the bench scale systems was needed to reach the level of 4.0 g N/(kg VSS×h).The addition of the distillery and fish-pickling wastewater at the beginning of the anoxic phase in the anaerobic P release - anoxic P uptake experiments resulted in considerably higher (over 20%) NURs compared the same experiments with the other carbon sources. Moreover, the addition of the tested carbon sources did not appear to adversely affect the parallel P uptake rates.
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
WATER ENVIRONMENT RESEARCH
no. 81,
pages 896 - 906,
ISSN: 1061-4303 - Language:
- English
- Publication year:
- 2009
- Bibliographic description:
- Swinarski M., Mąkinia J., Czerwionka K., Chrzanowska M., Drewnowski J.: Comparison of the Effects of Conventional and Alternative External Carbon Sources for Enhancing of the Denitrification Process// WATER ENVIRONMENT RESEARCH. -Vol. 81, nr. iss. 9 (2009), s.896-906
- Verified by:
- Gdańsk University of Technology
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