Alkaline Solubilization of Coconut Shells for Use in the Denitrification Process
| Autor: | P. Elefsiniotis, David G. Wareham |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Denitrification Chemistry Inorganic chemistry Chemical oxygen demand chemistry.chemical_element Pollution Nitrogen Laboratory flask Denitrifying bacteria chemistry.chemical_compound Activated sludge Nitrate Environmental Chemistry Organic matter Waste Management and Disposal Nuclear chemistry |
| Zdroj: | Environmental Engineering Science. 26:673-678 |
| ISSN: | 1557-9018 1092-8758 |
| DOI: | 10.1089/ees.2008.0020 |
| Popis: | This research investigated the suitability of alkali-treated coconut shells as a carbon source for denitrification. Suitability was assessed through an exploration of specific denitrification (kN) and carbon consumption (kC) rates, in addition to kinetic constants. The rates and/or constants were calculated from batch tests conducted in five denitrification flasks. Each flask contained three components, with the first being activated sludge that had been washed to remove residual organic matter and that provided a denitrifying biomass. The second component was the electron donor, which consisted of neutralized supernatant from carbon-extraction flasks. These flasks had coconut shell fragments (2 mm ≤ x ≤10 mm) which had been soaked for 7 days in NaOH (pH = 12); yielding a net release of approximately 700 mg L−1 chemical oxygen demand (COD). The final component was the electron acceptor; namely, 55 mg L−1 of nitrate (NO3−-N). The addition of this quantity of nitrate yielded a nonlimiting carbon-to... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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