Dénitrification. Studies with laboratory-scale continuous-flow units

Toit, P.J. Du; Davies, T.R.

doi:10.1016/0043-1354(73)90029-8

Cited by 14 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Denitrification is a respiratory process in which bacteria use nitrate or nitrite as a terminal electron acceptors 7) . Different types of organic hydrogen donors such as methanol 8) , ethanol 9) and sucrose 10) have been used. These studies demonstrated that denitrification rates are sufficiently high, but at the same time, the occurrence of secondary pollution problem caused by injected substance as well as clogging problems caused by excessive growth of heterotrophic bacteria and/or produced nitrogen gas [9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

An in-Situ Denitrification and Oxidation Process With Injection of Electrolytic Hydrogen and Oxygen

Nidegawa

Sakakibara

2013

J. JSCE, Ser. G

View full text Add to dashboard Cite

Continuous treatments of synthetic groundwater were conducted by using an in-situ denitrification and oxidation process, and measurements of water quality parameters such as nitrate, nitrite, DO, etc. were made over one year. In the in-situ process, hydrogen gas and oxygen gas were produced by using an electrolytic cell and were injected separately into a laboratory scale aquifer filled with glass beads. Experimental results demonstrated that stable denitrification and oxygenation of groundwater were achieved. During the initial phase of experiment, nitrite was accumulated in a hydrogen-injected zone; however, it was oxidized to nitrate in subsequent oxygen-injected zone. In addition, water quality parameters such as TOC, SS, turbidity and chromaticity were smaller in the effluent than influent, and no clogging problem was observed. From these results, we concluded that the present process has several superior performances in terms of stability, effluent water quality and simplicity in long-term operation.

show abstract