To know the complete distribution of E. coli across water and
sludge treatment lines, results of concentration were expressed as
number of colonies presents by day (CFUd1
) as function of inflow
in each process, by means of liquid volumetric flow rate (VF),
included in Fig. 1. Across the water line there is a maximum
theoretical loss of 3.73.1013
CFUd1
through decanters, however,
the amount of E. coli entering to the ATAD at day is 7.16.1014
CFU,
indicating that a total of 6.79.1014
CFU have been generated during
decantation processes (decanter 1 + decanter 2). The greatest loss
of E. coli is produced throughout trickling filters tanks,where itwas
also observed E. coli in the biofilmgenerated around the filters. This
biofilm is decanted itself producing sludge, which can accumulate
microorganisms theoretically eliminated and even increasing their
concentration due to organic matter content. Also, the presence of
microorganisms as bacteria or algae in biofilms, especially in
filters, suppose an increase of biomass which could promote the
development of protozoa and E. coli among others which, in turn,
contribute to the removal of organic matter.
To know the complete distribution of E. coli across water andsludge treatment lines, results of concentration were expressed asnumber of colonies presents by day (CFUd1) as function of inflowin each process, by means of liquid volumetric flow rate (VF),included in Fig. 1. Across the water line there is a maximumtheoretical loss of 3.73.1013CFUd1through decanters, however,the amount of E. coli entering to the ATAD at day is 7.16.1014CFU,indicating that a total of 6.79.1014CFU have been generated duringdecantation processes (decanter 1 + decanter 2). The greatest lossof E. coli is produced throughout trickling filters tanks,where itwasalso observed E. coli in the biofilmgenerated around the filters. Thisbiofilm is decanted itself producing sludge, which can accumulatemicroorganisms theoretically eliminated and even increasing theirconcentration due to organic matter content. Also, the presence ofmicroorganisms as bacteria or algae in biofilms, especially infilters, suppose an increase of biomass which could promote thedevelopment of protozoa and E. coli among others which, in turn,contribute to the removal of organic matter.
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