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Drinking Water Engineering and Science An interactive open-access journal
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Volume 5, issue 1
Drink. Water Eng. Sci., 5, 23-29, 2012
https://doi.org/10.5194/dwes-5-23-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Baltic Water Research Conference (2011)

Drink. Water Eng. Sci., 5, 23-29, 2012
https://doi.org/10.5194/dwes-5-23-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

  10 Jul 2012

10 Jul 2012

Effect of biostimulation on biodegradation of dissolved organic carbon in biological filters

K. Tihomirova, A. Briedis, J. Rubulis, and T. Juhna K. Tihomirova et al.
  • Department of Water Engineering and Technology, Riga Technical University, Azenes street 16/20-263, LV-1048, Riga, Latvia

Abstract. The addition of labile organic carbon (LOC) to enhance the biodegradation rate of dissolved organic carbon (DOC) in biological columns was studied. Acetate standard solution (NaAc) and Luria Bertrani (LB) medium were used as LOC as biostimulants in glass column system used for measurements of biodegradable dissolved organic carbon (BDOC). The addition of LOC related with the increase of total DOC in sample. The concentration of BDOC increased up to 7 and 5 times and was utilized after 24 min. contact time. The biodegradation rate constant was increased at least 26 times during adaptation-biostimulation period. There was a strong positive correlation between the biodegradation rate constant and the concentration of BDOC. Biostimulation period ranged from 24 to 53 h for NaAc biostimulant and from 20 to 168 h for LB. The study has shown that LOC could be used as stimulator to enhance the biodegradation rate of DOC during biofiltration.

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