Nitrate reduction by anaerobic sludge using glucose at various nitrate concentrations

ammonification, denitrification and methanogenic activities

Joseph C. Akunna, C. Bizeau, R. Moletta

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

A synthetic wastewater containing glucose as the sole source of carbon was used to assay glucose-acclimatized anaerobic digester sludge in batch-tests for its potential to carry out ammonification (nitrate- -> ammonium), denitrification (nitrate —>nitrogen gas) and to continue anaerobic digestion processes at various nitrate loads. Nitrate—>ammonium reduction activity was found to increase with decrease in the initial nitrate load. This activity appeared to take place principally during the acidogenesis of the glucose. Nitrate/nitrite loss after the fermentation process was essentially through denitrification. The denitrification capacity of the anaerobic sludge used was very high. Up to 80% of added nitrate was denitrified. The presence of nitrate or nitrite enhanced the fermentation of glucose to acetic acid but inhibited the production of propionic acid and methane. This inhibition was not observed after the complete reduction of nitrate and nitrite.
Original languageEnglish
Pages (from-to)41-49
Number of pages9
JournalEnvironmental Technology
Volume15
Issue number1
DOIs
Publication statusPublished - Jan 1994

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ammonification
Denitrification
Nitrates
denitrification
glucose
sludge
nitrate
Glucose
Nitrites
nitrite
Fermentation
fermentation
Anaerobic digestion
Methane
ammonium nitrate
Ammonium Compounds
Acetic Acid
acetic acid
Assays
Wastewater

Cite this

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abstract = "A synthetic wastewater containing glucose as the sole source of carbon was used to assay glucose-acclimatized anaerobic digester sludge in batch-tests for its potential to carry out ammonification (nitrate- -> ammonium), denitrification (nitrate —>nitrogen gas) and to continue anaerobic digestion processes at various nitrate loads. Nitrate—>ammonium reduction activity was found to increase with decrease in the initial nitrate load. This activity appeared to take place principally during the acidogenesis of the glucose. Nitrate/nitrite loss after the fermentation process was essentially through denitrification. The denitrification capacity of the anaerobic sludge used was very high. Up to 80{\%} of added nitrate was denitrified. The presence of nitrate or nitrite enhanced the fermentation of glucose to acetic acid but inhibited the production of propionic acid and methane. This inhibition was not observed after the complete reduction of nitrate and nitrite.",
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AU - Bizeau, C.

AU - Moletta, R.

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N2 - A synthetic wastewater containing glucose as the sole source of carbon was used to assay glucose-acclimatized anaerobic digester sludge in batch-tests for its potential to carry out ammonification (nitrate- -> ammonium), denitrification (nitrate —>nitrogen gas) and to continue anaerobic digestion processes at various nitrate loads. Nitrate—>ammonium reduction activity was found to increase with decrease in the initial nitrate load. This activity appeared to take place principally during the acidogenesis of the glucose. Nitrate/nitrite loss after the fermentation process was essentially through denitrification. The denitrification capacity of the anaerobic sludge used was very high. Up to 80% of added nitrate was denitrified. The presence of nitrate or nitrite enhanced the fermentation of glucose to acetic acid but inhibited the production of propionic acid and methane. This inhibition was not observed after the complete reduction of nitrate and nitrite.

AB - A synthetic wastewater containing glucose as the sole source of carbon was used to assay glucose-acclimatized anaerobic digester sludge in batch-tests for its potential to carry out ammonification (nitrate- -> ammonium), denitrification (nitrate —>nitrogen gas) and to continue anaerobic digestion processes at various nitrate loads. Nitrate—>ammonium reduction activity was found to increase with decrease in the initial nitrate load. This activity appeared to take place principally during the acidogenesis of the glucose. Nitrate/nitrite loss after the fermentation process was essentially through denitrification. The denitrification capacity of the anaerobic sludge used was very high. Up to 80% of added nitrate was denitrified. The presence of nitrate or nitrite enhanced the fermentation of glucose to acetic acid but inhibited the production of propionic acid and methane. This inhibition was not observed after the complete reduction of nitrate and nitrite.

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