Abstract
In present study, effluent from anaerobic digestion of swine wastewater was treated by the simultaneous partial nitrification, anaerobic ammonium oxidation and denitrification (SNAD) process using a lab scale 5. L sequencing batch reactor (SBR) under ambient temperature. The fluctuation of anaerobic digester liquor quality (COD, 387 ± 145. mg/L; TKN, 662 ± 190 mg/L; NH4+-N, 519 ± 134 mg/L) and temperature created difficulties to develop a stable SNAD process in the SBR (days 1-285). Fed batch feeding strategy was adopted to have a stable condition in the reactor and overcome the negative effects of organic nitrogen. The average total nitrogen, NH4+-N and COD removal efficiencies in the SBR under steady state conditions (days 485-523) were 80%, 96% and 76%, respectively. The results showed that presence of organic nitrogen, mode of feeding and reactor temperature affects the SNAD process.
Original language | English |
---|---|
Pages (from-to) | 191-198 |
Number of pages | 8 |
Journal | Bioresource Technology |
Volume | 141 |
DOIs | |
State | Published - Aug 2013 |
Keywords
- Anammox
- Fed batch
- Nitrogen removal
- Organic nitrogen
- Swine wastewater