Respirometry as a Simple Operational Tool for Monitoring of MBBR and IFAS Biofilm Systems

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Abstract:

Biofilm systems utilizing free-floating carriers are by now an established wastewater treatment process. However, such systems lack operational tools to be used for process monitoring and analysis (equivalent to MLSS or SRT in activated sludge systems). A simple respirometric method is used as an operational tool which allows close monitoring of MBBR and IFAS systems, allowing operators to have better understanding of varying conditions within the biofilm process. In addition, Respirometry can be used to assess important issues such as effective surface area of different types of media, and distribution of different biofilm populations (autotrophic and heterotrophic) under different process conditions.

Respirometric data from two full scale plants – one an MBBR, and the other an IFAS system — as well as data from two MBBR pilot plants is presented, along with operational and process data showing the use of Respirometry in identifying toxic events, changes in ammonia removal, shifts in population distribution during changes of operational modes, and comparative surface area testing of different carrier media.

Keywords: IFAS; MBBR; OUR; SOUR; autotrophic biomass; effective surface area; heterotrophic biomass; respiration rate; toxicity

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864710798208665

Publication date: January 1, 2010

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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