Stimulating Nitrogen Biokinetics with the Addition of Hydrogen Peroxide to Secondary Effluent Biofiltration
| Autor: | Shlomi Dagan, Hadas Mamane, Dror Avisar, Liron Friedman, Kartik Chandran, Uwe Hübner, Michael Elgart, Haim Cikurel, Martin Jekel, Jorge Santo-Domingo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
0301 basic medicine Denitrification Hydraulic retention time hydrogen peroxide 010501 environmental sciences high-rate biofiltration nitrification denitrification 01 natural sciences lcsh:TD1-1066 03 medical and health sciences chemistry.chemical_compound Organic matter lcsh:Environmental technology. Sanitary engineering lcsh:TA170-171 Hydrogen peroxide 0105 earth and related environmental sciences chemistry.chemical_classification Chemical oxygen demand General Engineering Anoxic waters ddc lcsh:Environmental engineering 030104 developmental biology chemistry Environmental chemistry Biofilter Nitrification ddc:620 |
| Zdroj: | Clean Technologies, Vol 2, Iss 1, Pp 53-73 (2020) Clean Technologies Volume 2 Issue 1 Pages 5-73 |
| ISSN: | 2571-8797 |
| Popis: | Tertiary wastewater treatment could provide a reliable source of water for reuse. Amongst these types of wastewater treatment, deep-bed filtration of secondary effluents can effectively remove particles and organic matter however, NH4+ and NO2&minus are not easily removed. This study examined the feasibility of stimulating microbial activity using hydrogen peroxide (H2O2) as a bio-specific and clean oxygen source that leaves no residuals in the water and is advantageous upon aeration due to the solubility limitations of the oxygen. The performance of a pilot bio-filtration system at a filtration velocity of 5&ndash 6 m/h, was enhanced by the addition of H2O2 for particle, organic matter, NH4+, and NO2&minus removal. Hydrogen peroxide provided the oxygen demand for full nitrification. As a result, influent concentrations of 4.2 ± 2.5 mg/L N-NH4+ and 0.65 ± 0.4 mg/L N-NO2 were removed during the short hydraulic residence time (HRT). In comparison, filtration without H2O2 addition only removed up to 0.6 mg/L N-NH4+ and almost no N-NO2&minus A DNA metagenome analysis of the functional genes of the media biomass reflected a significant potential for simultaneous nitrification and denitrification activity. It is hypothesized that the low biodegradability of the organic carbon and H2O2 addition stimulated oxygen utilization in favor of nitrification, followed by the enhancement of anoxic activity. |
| Databáze: | OpenAIRE |
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