Aerobic granular sludge technology and nitrogen removal for domestic wastewater treatment
| Autor: | Tiago R.V. Akaboci, Rejane Helena Ribeiro da Costa, Lorena Bittencourt Guimarães, Jamile Wagner |
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| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Denitrification Sewage Nitrogen Granule (cell biology) Environmental engineering Wastewater Pulp and paper industry Nitrification Waste Disposal Fluid chemistry.chemical_compound Granulation Bioreactors chemistry Aerobic granulation Sewage treatment Nitrite Nitrites Water Science and Technology |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 71(7) |
| ISSN: | 0273-1223 |
| Popis: | This study evaluated aerobic granulation and nitrogen removal via assimilation, nitrification, and denitrification of a system fed with real domestic wastewater. The granulation process was complete after 160 days of operation. The mature granules had an almost spherical structure, an average size of 473.0 μm, and a good settling ability (SVI30 of 75.6 mL g−1). Ammonium assimilation for cell growth varied between 3.5 and 64.6% during reactor start-up. After granule formation, assimilation accounted for less than 5% and nitrogen was mainly removed by partial nitrification up to nitrite, followed by denitrification via nitrite. Average efficiencies of 86.6% for nitrification, 59.5% for denitrification, and 60.5% for total nitrogen were obtained in this period. The assimilation ability of the mature granules grown on domestic wastewater was lower than the commonly reported results obtained for synthetic granules. |
| Databáze: | OpenAIRE |
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