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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F19%3A43915520" target="_blank" >RIV/60461373:22320/19:43915520 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26110/18:PU131685 RIV/00216208:11310/19:10382510

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0048969718330110" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0048969718330110</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.scitotenv.2018.08.042" target="_blank" >10.1016/j.scitotenv.2018.08.042</a>

Result language

angličtina

Original language name

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

Original language description

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 mate- rials: 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 or- ganisms, as well as on their denitrification efficiency and NO−3 load removal rate (LRT). The results show that 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 NO−3·dm3·d−1 for WG:BWCH; 85% and 1.2 mg NO−3·dm3·d−1 for WG:SWCH). Deni- trification bioreactors with mixed woodchip filling material present a promising, cheap, and extensive technol- ogy for the treatment of agricultural field run-offs.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20701 - Environmental and geological engineering, geotechnics

Project

<a href="/en/project/QJ1520280" target="_blank" >QJ1520280: Sustainable technology of nitrogen removal from farmland drainage</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Science of the Total Environment

ISSN

0048-9697

e-ISSN

—

Volume of the periodical

647

Issue of the periodical within the volume

January

Country of publishing house

BE - BELGIUM

Number of pages

7

Pages from-to

888-894

UT code for WoS article

000447090400089

EID of the result in the Scopus database

2-s2.0-85051048137