Details

Autor(en) / Beteiligte

• Yan, Jia
• Wang, Siji
• Wu, Lingyao
• Li, Shugeng
• Li, Huosheng
• Wang, Yu
• Wu, Jiapeng
• Zhang, Hongguo
• Hong, Yiguo

Titel

Long-term ammonia gas biofiltration through simultaneous nitrification, anammox and denitrification process with limited N2O emission and negligible leachate production

Ist Teil von

• Journal of cleaner production, 2020-10, Vol.270, p.122406, Article 122406

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Ammonia is toxic and malodorous gas, which is emitted from agricultural and industrial sources. Most of known ammonia gas treatment methods share the disadvantages of expensive cost, by-product pollution and high energy consumption. In this study, an ammonia gas biotreatment method was developed, through simultaneous nitrification, anammox and denitrification process (SNAD) in a biofilter, which was expected to reduce operation cost, secondary pollution and energy consumption. Ammonia gas was converted to di-nitrogen gas (97.2–99.5%) and nitrous oxide (0.5–1.8%), with the highest ammonia loading rate of 0.173 gNH3/gVSS·d. Removed ammonia was taken up by both nitrification (70.6%) and anammox (29.4%) process. Anammox and denitrification process contributed to about 60% and 40% of di-nitrogen gas production in SNAD system, respectively. N2O emission might be caused by nitrification as well as denitrification processes, but not by anammox process in the reactor. TN removal efficiency achieved up to 99.4%, which suggested negligible leachate production in SNAD system for ammonia gas filtration. Anammox activity was not inhibited after introducing oxygen, which was most likely related to activity of oxygen-consuming ammonia oxidation, nitrite oxidation and denitrification. As far as know, this study is the first evidence for ammonia gas biofiltration with anammox-related technology, which might be a highly efficient and cost effective solution for ammonia gas removal with less energy consumption (<30%), biomass production (∼10%), greenhouse gas emission (70–80%) and wastewater production (100%). [Display omitted] •NH3 gas was treated through simultaneous nitrification, anammox and denitrification.•Ammonia was effectively converted to N2 and N2O (<1.8%) in SNAD system.•N2 production was attributed to both anammox (60%) and denitrification (40%).•No leachate produced in SNAD reactor due to high TN removal efficiency.•Energy consumption and biomass production reduced up to 30% and 90%, respectively.