کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
684678 | 889025 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Combined process of urea nitrogen removal in anaerobic Anammox co-culture reactor Combined process of urea nitrogen removal in anaerobic Anammox co-culture reactor](/preview/png/684678.png)
In this study, the feasibility of biological urea nitrogen removal in anaerobic Anammox co-culture was investigated. After 100 days of operation, complete urea nitrogen removal of 0.35 g (NH2)2CO–N L−1 d−1 was achieved. The pure Anammox bacteria were obtained by percoll density-gradient centrifugation and found to be of incapable to hydrolyze urea. The ureolytic bacteria were isolated from the Anammox co-culture by the spread plate and streak. Comparative analysis of partial 16S rDNA sequence presented it belongs to Bacillus sp., and so named as Bacillus sp. LST-1. Fluorescence in situ hybridization was applied to identify the ratio of Bacillus sp. and Anammox in the reactor and the value was approximately 1:4. Urea nitrogen removal was realized in this autotrophic, anoxic reactor via the combined process of urea hydrolysis by Bacillus sp. LST-1 and ammonium oxidizing by Anammox. The investigation of this combined process might have an actual significance in engineering application for its low operational cost.
Journal: Bioresource Technology - Volume 99, Issue 6, April 2008, Pages 1722–1728