An important source of nitrogen load entering the biological part of wastewater treatment plants (WWPTs) is derived from the anaerobic sludge digestion processes. Sludge digestion liquors constitute only 1-2% of the inflow to the plant, but the load of nitrogen directed with them to the main stream may be as high as 10-20% of the total nitrogen load. Therefore, numerous studies have focused on treatment of sludge digestion liquors using alternative methods to the conventional nitrification-denitrification. In particular, the deammonification process is very promising and may constitute the successful strategy for nitrogen removal (Shaughnessy et al., 2011). The deammonification process involves two steps. The first step is the partial nitrification of ammonia (NH4-N) by ammonia oxidizing bacteria (AOB) to produce nitrite (NO2-N) and the second step is the anammox process to “anaerobically” oxidize ammonia to nitrogen gas with nitrite as an electron acceptor (Lackner et al., 2014). The aim of this study was to examine the impact of dissolved oxygen (DO) concentration and selected aeration strategy on enhancing the deamonification process. A special attention has been paid to testing and comparing the process performance at the different aeration strategies, i.e. intermittent aeration vs. continuous aeration.
Authors
Additional information
- Category
- Aktywność konferencyjna
- Type
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Language
- angielski
- Publication year
- 2017
