Publication detail

The impact of woodchip-gravel mixture on the efficiency and toxicity of denitrification bioreactors

ŠEREŠ, M. MOCOVÁ, K. MORADI, J. KRIŠKA-DUNAJSKÝ, M. KOČÍ, V. HNÁTKOVÁ, T.

Original Title

The impact of woodchip-gravel mixture on the efficiency and toxicity of denitrification bioreactors

Type

journal article in Web of Science

Language

English

Original Abstract

Woodchip-based denitrification bioreactors are widely used for treatment of high loads of nitrate pollution in agricultural run-off water. A concern raised recently, as a consequence of various organic fillings being experimented with, is whether the positive effect given by nitrate reduction could override the negative effects of such bioreactors, mainly caused by degradation of wood and the production of potentially harmful conditions for aquatic ecosystems. This paper presents the results of the experimental testing of two different filling materials: birch (BWCH) and spruce (SWCH) woodchip, and their mixture with washed gravel (WG) in volumetric ratio 10:1.We have focused on the leaching of organic carbon and phenols, and its impact on selected aquatic organisms, aswell as on their denitrification efficiency andNO3 −load removal rate (LRT). The results showthat TOC, DOC and FNI (phenolic index) leaching is higher for the pure woodchip materials and is closely correlated with the growth inhibition of tested organisms (Vibrio fischeri, Daphnia magna, Desmodesmus subspicatus, Lemna minor). The highest denitrification efficiency and the highest load removal rates were recorded in mixed filling material (96% and 1.4 mg NO3 −·dm3·d−1 forWG:BWCH; 85% and 1.2 mg NO3 −·dm3·d−1 forWG:SWCH). Denitrification bioreactors with mixed woodchip filling material present a promising, cheap, and extensive technology for the treatment of agricultural field run-offs.

Keywords

Denitrification,Drainage systems, Ecotoxicological bioassays, Leachate toxicity, Nitrates, Nutrients, Woodchips bioreactors

Authors

ŠEREŠ, M.; MOCOVÁ, K.; MORADI, J.; KRIŠKA-DUNAJSKÝ, M.; KOČÍ, V.; HNÁTKOVÁ, T.

Released

10. 1. 2019

ISBN

0048-9697

Periodical

Science of the Total Environment

Number

647

State

Kingdom of the Netherlands

Pages from

888

Pages to

894

Pages count

7

URL

https://www.sciencedirect.com/science/article/pii/S0048969718330110?via%3Dihub

BibTex

@article{BUT156268,
  author="Michal {Šereš} and Klára Anna {Mocová} and Jabbar {Moradi} and Michal {Kriška-Dunajský} and Vladimír {Kočí} and Tereza {Hnátková}",
  title="The impact of woodchip-gravel mixture on the efficiency and toxicity of denitrification bioreactors",
  journal="Science of the Total Environment",
  year="2019",
  number="647",
  pages="888--894",
  doi="10.1016/j.scitotenv.2018.08.042",
  issn="0048-9697",
  url="https://www.sciencedirect.com/science/article/pii/S0048969718330110?via%3Dihub"
}