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Attemps to increase the efficiency of nitrate reduction process in biological municipal sewage treatment MEANDER

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Pado R., Pasmionka I., Pawlowska-Cwiek L., Starzyk K.
Biotechnologia
|
1995
|
issue 2
164-178
EN
In this work the attempts to increase the efficiency of nitrate reduction in denitrifying bacteria cells were made.Two different tests were used.One procedure was based on the prolongation of the sedimentationtime in order to decrease the levelof inhibiting O2 in the sewage.The level of NO3 was increased in this test compared to 6 h "standard" alternate sedimentation/aeration, but the speed of nitrate eduction wasnot so satisfactory. The other procedure involved attemps to increase tghe number of denitrifying bacteria in the sedimented chamber.Theeffects in both tests show the increase in speed of nitrate reduction, particularly after 24 h from the addition of the culture prepared in advance.However, the disadvantage of the second way was introducing additional NO3 together with the bacteria.
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