Modified microbiology through enhanced denitrification by addition of various organic substances—temperature effect

Worldwide, the environmental nitrate (NO 3 − ) problem is increasingly coming into focus. These increases in NO 3 − concentration result mainly from agricultural inputs and are further exacerbated by decreasing and finite geogenic NO 3 − degradation capacity in aquifers. Thus, treatment methods are...

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Veröffentlicht in:Environmental science and pollution research international 2023-05, Vol.30 (21), p.60282-60293
Hauptverfasser: Ortmeyer, Felix, Guerreiro, Marco Alexandre, Begerow, Dominik, Banning, Andre
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creator Ortmeyer, Felix
Guerreiro, Marco Alexandre
Begerow, Dominik
Banning, Andre
description Worldwide, the environmental nitrate (NO 3 − ) problem is increasingly coming into focus. These increases in NO 3 − concentration result mainly from agricultural inputs and are further exacerbated by decreasing and finite geogenic NO 3 − degradation capacity in aquifers. Thus, treatment methods are becoming more and more important. In this study, the effects of enhanced denitrification with addition of organic carbon (C) on thereby autochthonous occurring microbiology and compared at room temperature as well as 10 °C were investigated. Incubation of bacteria and fungi was carried out using natural sediments without degradation capacity and groundwater with high NO 3 − concentrations. Addition of the four applied substrates (acetate, glucose, ascorbic acid, and ethanol) results in major differences in microbial community. Cooling to 10 °C changes the microbiology again. Relative abundances of bacteria are strongly influenced by temperature, which is probably the explanation for different denitrification rates. Fungi are much more sensitive to the milieu change with organic C. Different fungi taxa preferentially occur at one of the two temperature approaches. Major modifications of the microbial community are mainly observed whose denitrification rates strongly depend on the temperature effect. Therefore, we assume a temperature optimum of enhanced denitrification specific to each substrate, which is influenced by the microbiology.
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subjects acetates
Acetic acid
ambient temperature
Aquatic Pollution
Aquifers
Ascorbic acid
Atmospheric Protection/Air Quality Control/Air Pollution
Bacteria
Bacteria - metabolism
Carbon
Degradation
Denitrification
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Ethanol
Fungi
glucose
Groundwater
Groundwater - microbiology
microbial communities
Microbiology
Microorganisms
Nitrates
Nitrates - analysis
Nitrogen
Organic carbon
Research Article
Room temperature
Sediments
Substrates
Temperature
Temperature effects
Temperature preferences
Waste Water Technology
Water Management
Water Pollution Control
title Modified microbiology through enhanced denitrification by addition of various organic substances—temperature effect
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