Ammonia removal from a waste air stream using a biotrickling filter packed with polyurethane foam through the SND process

Community structure of denitrifying and total bacteria during nitrogen accumulation in an ammonia‐loaded biofilter

“…Moussavi et al . () reported up to 98% nitrogen removal with the addition of methanol in a biotrickling filter, under conditions of 0·1–0·5 kg N m −3 biofilter day −1 , and De Clippeleir et al . () showed the potential benefit of using anammox bacteria inside an NH 3 gas biofilter.…”

Evaluating the Effect of Dissolved Oxygen on Simultaneous Nitrification and Denitrification in Polyurethane Foam Contact Oxidation Reactors

“…Many studies achieved partial nitrification via nitrite by using low dissolved oxygen to enrich AOB or washout NOB because of their different oxygen affinity constants (Wang et al, 2008). Moussavi et al (2010) reported that heterotrophic bacteria were two orders of magnitude higher than autotrophic bacteria in a bench-scale biotrickling filter. Low dissolved oxygen would become the limitary factor in the oxidization of ammonia and some easily biodegradable organic matters.…”

“…There were no excised DGGE bands belonging to Nitrosospira, which may imply that the genera were not the dominant members in the system. Moussavi et al (2010) reported that high dissolved oxygen will result in the speedy increase of heterotrophic bacteria, which affects the growth of nitrifying bacteria by possession of space. The Pseudomonas related to band 5 and 15 had the maximum content in the stage of dissolved oxygen of 0.5 to 1.0 mg/L and dissolved oxygen of 2.5 to 3.5 mg/L with the best total nitrogen removal, while they had not adapted to the conditions of dissolved oxygen levels of 10.0 to 12.0 mg/L.…”

Effects of thiosulfate addition on ammonia and nitrogen removal in biofilters packed with Oyaishi (pumice tuff)

“…This system consisted of a biotrickling filter, a denitrification reactor, and a post‐treatment reactor for the removal of residual chemical oxygen demand (COD). Moussavi, Khavanin, and Sharifi () demonstrated the potential removal of more than 70% of nitrogen through simultaneous nitrification and denitrification processes with the addition of methanol as a carbon source in trickling biofiltration with an inlet load of approximately 0.1–0.5 kg N/m 3 /day. Furthermore, De Clippeleir et al () reported the autotrophic ammonia removal with the application of the oxygen‐limited autotrophic nitrification/denitrification (OLAND) process with anaerobic ammonium oxidation (anammox) bacteria.…”