Abstract
An internal circulation baffled bioreactor was employed to realize simultaneous di-oxygenation of phthalic acid (PA) and denitrification of nitrate, which require aerobic and anoxic conditions, respectively. Adding a small concentration of succinate as an exogenous electron donor stimulated PA di-oxygenation, which produced readily oxidizable downstream products whose oxidation also enhanced denitrification of nitrate; succinate addition also stimulated denitrification. Depending on the concentration of PA, addition of 0.17 mM succinate increased the PA removal rate by 25 and 42%, while the corresponding nitrate removal rate was increased by 73 and 51%. UV/H2O2 advanced oxidation of PA had the same effects as adding succinate, since succinate is generated by UV/H2O2; this acceleration effect was approximately equivalent to adding 0.17 mM succinate.
Original language | English (US) |
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Pages (from-to) | 195-203 |
Number of pages | 9 |
Journal | Biodegradation |
Volume | 28 |
Issue number | 2-3 |
DOIs | |
State | Published - Jun 1 2017 |
Keywords
- Denitrification
- Di-oxygenation
- Nitrate
- Phthalic acid
- Succinate
ASJC Scopus subject areas
- Environmental Engineering
- Microbiology
- Bioengineering
- Environmental Chemistry
- Pollution