Aeration system design in integrated fixed-film activated sludge (IFAS) and moving bed biofilm reactors (MBBR) using stainless steel pipe diffusers, manifold, and down pipes

Chandler Johnson, Joshua P. Boltz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Aerobic integrated fixed-film activated sludge (IFAS) and moving bed biofilm reactors (MBBRs) use an engineered aeration system consisting of stainless-steel pipe diffusers, manifold (or submerged air header), down pipes, and manually operated air-flow control valves. The so-called medium-bubble diffuser has a large diameter (i.e., 4-mm) orifice that is situated along the underside of the stainless steel pipe diffuser. Therefore, medium-bubble diffusers are not as susceptible to scaling and fouling as fine-bubble diffusers, and operational experience has proven that medium-bubble diffusers require significantly less maintenance than fine-bubble diffusers. The oxygen transfer efficiency (OTE) of a medium-bubble diffuser is better than that of a typical coarse-bubble diffuser. The presence of free moving plastic biofilm carriers in a bioreactor improves OTE. Unfortunately, there is not a generally accepted design criteria for the aeration systems that are used in aerobic IFAS zones and MBBRs. This paper will describe a method for designing a state-of-the-art aeration system for aerobic IFAS zones and MBBRs. The methodology presented in this paper may be used to design aeration systems typical of state-of-the-art aerobic free moving plastic biofilm carrier-based reactors.

Original languageEnglish (US)
Title of host publication86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013
PublisherWater Environment Federation
Pages3781-3808
Number of pages28
ISBN (Electronic)9781510870444
DOIs
StatePublished - 2013
Externally publishedYes
Event86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013 - Chicago, United States
Duration: Oct 5 2013Oct 9 2013

Publication series

Name86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013
Volume6

Conference

Conference86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013
Country/TerritoryUnited States
CityChicago
Period10/5/1310/9/13

Keywords

  • Aeration
  • Aerobic
  • Diffuser
  • IFAS
  • Integrated fixed-film activated sludge
  • Manifold
  • MBBR
  • Medium bubble
  • Moving bed biofilm reactor

ASJC Scopus subject areas

  • Water Science and Technology
  • Ecological Modeling
  • Environmental Chemistry
  • Pollution
  • Waste Management and Disposal

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