What is the formula of calculating biofilm age in MBBR? In some papers, we need dettachment rate of biomass to measure biofilm age. Do you know that? Do you have any idea? Could you please introduce me a reference or paper?
Thanks a lot!
MBBR is a good process for upgrading current wastewater treatment systems. Many studies regarding successful operation for new wastewater treatment plants and upgrades of existing wastewater treatment plants have been reported (Ødegaard et al., 1993; Hem et al., 1994; Orantes et al., 2002; Daude and Stephenson 2003; Andreottola et al., 2003). Andreottola.et al. (2000) found that hydraulic retention time (HRT) affected the COD removal in MBBR processes and suggested that the HRT should be higher than 5 h. Another study was performed by Andreottola et al., (2003), in which they evaluated the application of MBRR system for the upgrading of an overloaded MWWTP. A preliminary experimentation at pilot-scale was carried out in order to evaluate the efficiency of the system in the removal of organic matter
using a high loaded MBBR. KMT plastic media was applied
with a filling ratio of 50%. The applied surface loads
ranged between 5.4 and 32 g total COD/ m2.d.
"Ahmet Aygun et al.,ENVIRONMENTAL ENGINEERING SCIENCE, Volume 25, Number 9, 2008"
Hello, I think that biofilm age = biofilm mass / detachment rate. According to my knowledge detachment rate is not measurable. Biofilm age can therefore only be estimated with a model as proposed in our paper: A zero-dimensional biofilm model for dynamic simulation of moving bed bioreactor systems: Model concepts,
Peterson matrix, and application to a pilot-scale plant. Biochemical Engineering Journal 40 (2008) 392–398.
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