| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 681106 | Bioresource Technology | 2013 | 8 Pages |
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.
► SNAD process was used to treat the anaerobic digester liquor of swine wastewater. ► High NH4+-N removal efficiency (96%) was achieved under steady state conditions. ► Average COD removal efficiency of 76% was achieved under steady state conditions. ► Organic nitrogen negatively affects the performance of SNAD process. ► Fed batch feeding strategy facilitated to have stable SNAD process.
