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

Kód výsledku v 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>

Nalezeny alternativní kódy

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

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

<a href="/cs/project/QJ1520280" target="_blank" >QJ1520280: Udržitelná technologie pro odstranění dusičnanů ze zemědělských smyvů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Science of the Total Environment

ISSN

0048-9697

e-ISSN

—

Svazek periodika

647

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

7

Strana od-do

888-894

Kód UT WoS článku

000447090400089

EID výsledku v databázi Scopus

2-s2.0-85051048137