Publication detail

Production of sulphides in denitrifying woodchip bioreactors

MALÁ, J. HRICH, K. SCHRIMPELOVÁ, K. BÍLKOVÁ, Z.

Original Title

Production of sulphides in denitrifying woodchip bioreactors

Type

journal article in Web of Science

Language

English

Original Abstract

Denitrifying woodchip bioreactors, natural treatment systems used for the reduction of nitrates in agricultural runoff or groundwater, may cause adverse side effects within receiving waters. One of the least studied but nonetheless still serious issues is the production of hydrogen sulphide, which occurs in bioreactors under operating conditions favourable to its creation. The aim of this paper is to elucidate the effect of process parameters on the production of sulphides and the proportion of hydrogen sulphide in a 1-year-long experimental study with four laboratory-scale denitrifying bioreactors. During the study, the strong dependence of sulphate reduction and the production of sulphides on the effluent oxidation-reduction potential (ORP) and nitrate-nitrogen (NO3-N) concentrations of bioreactors became evident. Sulphide formation occurred at concurrent effluent NO3-N concentrations below 3 mg/L and ORPs lower than - 100 mV. The tested hydraulic retention time of 1.7 days was sufficiently long to achieve these conditions. At an effluent pH of 7 or lower, the majority of the total sulphides present were in the form of hydrogen sulphide. It is suggested that in order to avoid the production of hydrogen sulphide, the production of total sulphides has to be minimised.

Keywords

Agricultural runoff; Denitrifying bioreactor; Groundwater; Hydrogen sulphide; Pollution swapping; Sulphate reduction

Authors

MALÁ, J.; HRICH, K.; SCHRIMPELOVÁ, K.; BÍLKOVÁ, Z.

Released

15. 7. 2020

Publisher

SPRINGER HEIDELBERG

Location

HEIDELBERG

ISBN

0944-1344

Periodical

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

Year of study

27

Number

32

State

Federal Republic of Germany

Pages from

40769

Pages to

40776

Pages count

8

URL

https://rdcu.be/b5EfC

BibTex

@article{BUT164600,
  author="Jitka {Malá} and Karel {Hrich} and Kateřina {Schrimpelová} and Zuzana {Bílková}",
  title="Production of sulphides in denitrifying woodchip bioreactors",
  journal="ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH",
  year="2020",
  volume="27",
  number="32",
  pages="40769--40776",
  doi="10.1007/s11356-020-10089-4",
  issn="0944-1344",
  url="https://rdcu.be/b5EfC"
}