Skip to Main content Skip to Navigation
Journal articles

Numerical assessment of nitrogen removal from swine wastewater in activated sludge systems: Comparison between continuous and intermittent aeration

Abstract : The appropriate conditions needed to achieve nitrogen (N) removal from swine wastewater (SW) in an activated sludge continuous stirred-tank reactor (+settler) were assessed by performing numerical simulations. Air supply was considered through continuous or intermittent aeration (CA vs. IA), and several values were assumed for the SW BOD5-to-N ratio. By considering CA and low dissolved oxygen (DO) levels, feasibility for peforming N removal via nitrite through simultaneous nitrification–denitrification was confirmed. Nitrogen removal via nitrite was also the case when applying IA, even at higher DO ranges. The nitrite short-cut was shown to reduce energy consumption for aeration. However, regardless of the aeration method applied, sensitive DO controls will be required, particularly when the SW BOD5-to-N ratio takes low values. This study allowed to assess the operational conditions required when biologically treating SW to meet N standards and to identify situations in which a final post-treatment is needed before effluent discharge.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-03322660
Contributor : Fabrice Béline <>
Submitted on : Thursday, August 19, 2021 - 3:15:32 PM
Last modification on : Tuesday, September 7, 2021 - 3:44:09 PM

Identifiers

Collections

Citation

Miyoko Waki, Tomoko Yasuda, Yasuyuki Fukumoto, Fabrice Béline, Albert Magrí. Numerical assessment of nitrogen removal from swine wastewater in activated sludge systems: Comparison between continuous and intermittent aeration. Bioresource Technology Reports, Elsevier, 2020, 11, pp.100492. ⟨10.1016/j.biteb.2020.100492⟩. ⟨hal-03322660⟩

Share

Metrics

Record views

30