Spent Caustic Bioregeneration by using Thiobacillus denitrificans Bacteria

Spent Sulfidic Caustic was biologically treated and regenerated for reusing by Thiobacillus denitrificans bacteria, sulfide content oxidized and RSNa reduced dramatically.PH in this test was 11.8 and no neutralization has been done on spent caustic, so spent caustic as the most difficult of industrial wastes to dispose could be regenerate and reuse instead of disposing to sea or deep wells




References:
[1] Jelle Bouma, Preem GTB Spent Caustic and Desalter Review: Shell
Global Solutions, June 23, 2010
[2] Ali Samadi Afshar, Sayed Reza Hashemi ; Role and Effect of
Temperature on LPG Sweetening Process; World Academy of Science,
Engineering and Technology 79 2011
http://www.waset.org/journals/waset/v79/v79-13.pdf
[3] A. Olmos, Physiochemical Characterization of Spent Caustic from the
OXIMER Process and Sour Waters from. Mexican Oil refineries
[4] C. Maugans, M Howdshell, S. De Haan, A special report on Update:
Spent Caustic Treatment: Hydrocarbon processing, April 2010
[5] S. Mehmandoost, P. Hejaz, " Propane Treatment unit, Operating
Manual, Basis of Design & Unit Operating Considerations, " Iran South
Gas Field: Phases 9&10, 2005
[6] Ali Samadi Afshar,; Sayed Reza Hashemi,; , Mohsen Miri ;Parviz
SetayeshiHagh; Optimization of Effective Factors on Mercaptan
Extraction by Alkaline Solution .Journal: Petroleum Science and
Technology, Manuscript Type: Original Papers, Date Submitted by the
Author: 25-Jan-2011
[7] Amir Heidarinasab, Sayed Reza Hashemi; A study of biological
treatment of spent sulfidic caustic,; International Conference on
Chemical, Ecology and Environmental Sciences (ICCEES'2011),17 -18
Dec. Pattaya ,Thailand
[8] American Public Health Association (1985), Standard Methods for the
Examination of Water and Wastewater, 16th ed., APHA, New York
[9] M/S , Aquatic Remedies Company Instruction , #2 /17 School Road ,
Kolathur , Chennai , India - 600 099. www.aquaremedies.comefor