Dissolved Oxygen-Stat Titration Respirometry: Principle of Operation and Validation
| Autor: | Elena Ficara, A. Rocco, Alberto Rozzi |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Environmental Engineering
Chemistry Analytical chemistry chemistry.chemical_element Oxygen Dilution Respirometry Activated sludge Volume (thermodynamics) Environmental chemistry Volatile suspended solids Environmental Chemistry Titration Respiration rate General Environmental Science Civil and Structural Engineering |
| Zdroj: | Journal of Environmental Engineering. 129:602-609 |
| ISSN: | 1943-7870 0733-9372 |
| DOI: | 10.1061/(asce)0733-9372(2003)129:7(602) |
| Popis: | A method is presented to assess oxygen uptake rates which operates at constant dissolved oxygen concentration (DO). This method involves DO-stat titrations by controlled addition of a diluted H\d2O\d2 solution to a batch volume of activated sludge. The titrant flow rate is proportional to the biomass respiration rate, while the mass of H2O2 added is proportional to the oxidized organics. Classical batch respirometries (with and without gas flow, i.e., “open” and “closed”) were compared to the DO-stat technique using first NaSO\d2 as reducing chemical and then respiring aerobic biomass. An excellent correlation was found among estimates of oxygen consumption rate and short term yield coefficient by the three techniques. Inhibition by H\d2O\d2 was found to be negligible for biomass concentration as volatile suspended solids of ⩾ 1.5–2 g/L. |
| Databáze: | OpenAIRE |
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