BACTERIOLOGICAL TREATMENT OF DENITRIFICATION OF NITRATE AND NITRITE BY ISOLATED PSEUDOMONAS FROM BAGHDAD WASTE WATER

Hassoon Hammadi Ali, Sattar Abood Ahmed, Al-Dulaimi Abdul Sattar, Alzawi Waleed, Al-Iraqia University, Iraq

Abstract

During the denitrification of Al-Rustmiyah wastewater treatment plant in Baghdad wastewater the quality of water changes due to the presence of some species of microorganisms (Bacteria, Fungi, Algae and Protozoa) which utilize the organic substances such as (Glucides, protides, lipids, …etc) as nutrients. It was found that the occurrence of the bacteria belonging to a wide rang of genus and species, with genus Pseudomonas predominating.
This research is a lab scale study on biodegradation of environmental pollutants with nitrate and nitrite, which studies denitrifying bacteria such Pseudomonas aeruginosa. They were tested in labs and naturally in waste water of Al-Rustmiyah wastewater treatment plant in Baghdad.
It was found that strains of Pseudomonas were reduced of 21-35 % from NO3- and 31-47% from NO2- during 24 hours contained in used medium to some other nitrogenous.