Influence oFe3+ Ions on Nitrate Removal by Autotrophic Denitrification Using Thiobacillus denitrificans

Chemical and biochemical engineering quarterly

V. Trousil¹  E. Slehová¹  M. Slezák¹  J. Cakl¹  Z. Blažková¹  J. Palarčík¹ 

关键词: autotrophic denitrification;    nitrates removal;    nitrites removal;    Batch reactor;    Thiobacillus denitrificans;    water treatment;   

DOI  :  10.15255/CABEQ.2016.1024

来源: Croatian Society of Chemical Engineers

【 摘 要 】

Abstract The sulphur-based autotrophic denitrification process utilizing Thiobacillus denitrificans was studied experimentally as an alternative method of removing nitrates from industrial wastewater. The objective of the work was to examine the effect of ferric iron addition to the reaction mixture and determine optimal dosage for specific conditions. All experiments were carried out in anoxic batch bioreactor, and elemental sulphur was used as an electron donor. Compared to the control operation without ferric iron addition, significant increases in nitrates removal were demonstrated for the concentration of ferric iron equal to 0.1 mg L–1. However, under these conditions, increased nitrite content was detected in the reaction mixture which exceeds the limits for drinking water. (This work is licensed under a Creative Commons Attribution 4.0 International License.)

【 授权许可】

Unknown