Detail publikace

Phosphorus removal from agricultural runoff by enhanced denitrifying woodchip bioreactors

SCHRIMPELOVÁ, K. MALÁ, J. BÍLKOVÁ, Z. HRICH, K. KRIŠKA-DUNAJSKÝ, M.

Originální název

Phosphorus removal from agricultural runoff by enhanced denitrifying woodchip bioreactors

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

The water pollution caused by nutrients has become a problem, especially in agricultural areas. Nitrogen (N) and phosphorus (P) can cause the eutrophication of surface waters, and problems with their use as drinking water sources. One of the possible solutions is to employ denitrifying bioreactors, which are used for the reduction of high nitrate concentrations in shallow groundwaters. Our research was focused on the enhancement of these bioreactors with steel byproducts. These materials release Fe, which causes the precipitation and adsorption of P. The contribution presents the results of laboratory tests with 4 denitrifying columns. The columns were filled with the same material (poplar woodchips) and two of them were enhanced by the addition of steel turnings upstream of the wood medium. Inlet concentrations were approx. 20 mg/L of NO3-N and 1 mg/L of TP (total phosphorus). The bioreactors were operated for 9 weeks and the physicochemical parameters at the inlet and outlet were determined weekly – temperature, pH, oxidation-reduction potential (ORP), NO3-N, TP, and Fe. According to the results, the addition of steel has no noticeable impact on the pH, ORP and NO3-N at the outlet: there was no significant difference between the standard columns and the columns enhanced by steel turnings. The NO3-N removal initially increased with the time of column operation, stabilizing after 3 weeks of operation. In the 9th week, the outlet NO3-N concentration decreased to 1.3 mg/L; NO3-N removal efficiency was 94 % on average. In the first 5 weeks, the outlet TP concentrations increased due to woodchip leaching. The enhanced columns achieved higher P removal with a TP removal efficiency in the 9th week of 58 %. In the case of the columns with woodchips only, no TP removal was observed. The concentrations of Fe leached from the columns enhanced with steel turnings had a decreasing tendency, dropping from 2.4 to 0.4 mg/L.

Klíčová slova

Phosphorus, denitrifying bioreactor fill medium, iron byproducts, steel turnings

Autoři

SCHRIMPELOVÁ, K.; MALÁ, J.; BÍLKOVÁ, Z.; HRICH, K.; KRIŠKA-DUNAJSKÝ, M.

Vydáno

2. 7. 2018

Nakladatel

STEF92 Technology Ltd.

Místo

51 Alexander Malinov Blvd., 1712, Sofia, Bulgaria

ISBN

978-619-7408-46-1

Kniha

SGEM Conference Proceedings

Edice

Ecology, Economics, Education and Legislation

Číslo edice

1

ISSN

1314-2704

Periodikum

International multidisciplinary geoconference SGEM

Ročník

18

Číslo

5.1

Stát

Bulharská republika

Strany od

645

Strany do

652

Strany počet

8

BibTex

@inproceedings{BUT149189,
  author="Kateřina {Schrimpelová} and Jitka {Malá} and Zuzana {Bílková} and Karel {Hrich} and Michal {Kriška-Dunajský}",
  title="Phosphorus removal from agricultural runoff by enhanced denitrifying woodchip bioreactors",
  booktitle="SGEM Conference Proceedings",
  year="2018",
  series="Ecology, Economics, Education and Legislation",
  journal="International multidisciplinary geoconference SGEM",
  volume="18",
  number="5.1",
  pages="645--652",
  publisher="STEF92 Technology Ltd.",
  address="51 Alexander Malinov Blvd., 1712, Sofia, Bulgaria",
  doi="10.5593/sgem2018/5.1/S20.083",
  isbn="978-619-7408-46-1",
  issn="1314-2704"
}