Abstract
Abstract Anaerobic digestion (AD) is widely used for the treatment of livestock waste because the biogas produced can be utilized as energy source. Further treatment of AD effluents is often required for total nitrogen (TN) removal, which is typically carried out using biological nitrogen removal processes. However, the high free ammonia (FA) concentrations present in AD effluents can inhibit nitrification processes. This research tested a sequencing batch reactor (SBR) amended with particulate chabazite (chabazite-SBR) for removal of TN from anaerobically digested swine waste centrate. In the chabazite-SBR, zeolitic material with a high ion exchange (IX) capacity for NH4+ is used to ease nitrification inhibition. Once nitrification is complete, an external organic electron donor is supplied during an anoxic stage to promote denitrification. An overall TN removal efficiency of 84% was achieved in a laboratory-scale chabazite-SBR, with specific nitrification and denitrification rates of 0.43 and 1.49 mg-N/...
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
