Aerobic denitrification of a Pseudomonas sp. isolated from a high strength ammonium wastewater treatment facility

Scientific Research and Essays

Hongyu Wang¹ 

关键词:  ;    Aerobic denitrification;     ;    Pseudomonas ;    sp.;    wastewater.;   

DOI  :  10.5897/SRE10.559

学科分类：社会科学、人文和艺术（综合）

来源: Academic Journals

【 摘 要 】

An aerobic denitrifier (termed X31 in this study) isolated from a wastewater treatment facilitytreatinghigh strength ammoniumwastewaterwas genetically identified, and morphologically and physiologically characterized. Its aerobic denitrification performance was alsostudiedunder variouslevels ofDO, pH, temperature, and C/N ratios, as well as threecarbon sources. Experimental results showed that: 1) the 16S rDNA of X31 has a 99% similarity toPseudomonas stutzeri, but it is suggested to bea differentstraindue to its capability to carry aerobic denitrification at high DO levels that are normally inhibitory toP.stutzeri; 2) X31 is a mesophile and prefers a neutral to slightly alkaline environment to performitsaerobic denitrification process; 3)NoNO2--N accumulationwas observed during X31 aerobic denitrification process; 4) NO3--N removal by X31appeared to bea zero-order reaction over NO3--N concentrations when X31 grows exponentially, which needs further investigation; 5) As a heterotrophic bacteria, X31 growths and utilization ofNO3--Nvaried between different organic carbon sources.

【 授权许可】

CC BY