Anaerobic ammonium oxidation (Anammox) in immobilized activated sludge biofilms during the treatment of weak wastewater |
| |
Authors: | A N Nozhevnikova Yu V Litti V K Nekrasova I S Kulichevskaya N V Grigoryeva N I Kulikov M G Zubov |
| |
Institution: | 1.Winogradsky Institute of Microbiology,Russian Academy of Sciences,Moscow,Russia;2.ZAO ECOS Company,Sochi,Russia |
| |
Abstract: | This work studied the formation of molecular nitrogen by the microbial population of immobilized activated sludge of the domestic
wastewater treatment plants (WWTP) that employ the technology developed by ZAO ECOS Company. The technology includes physicochemical
water pretreatment and treated water recycling. A hard flexible fibrous brush carrier is used for the immobilization of microorganisms.
The presence of both aerobic and anaerobic microorganisms and functioning of the methanogenic microbial community was shown
in the biofilms developing on the carrier fibers and in suspended sludge. The high efficiency of nitrogen removal at a low
C/N ratio was established to be due to the conjugated nitrification, denitrification, and anammox processes, whose functioning
was demonstrated by laboratory cultivation methods and by studying the processes in batch and continuous reactors. Fluorescence
in situ hybridization with 16S rRNA-targeted oligonucleotide probes (FISH) revealed bacteria belonging to the order Planctomycetales, particularly their anammox group. This work is the first evidence of the important role of the anammox process in the combined
system of physicochemical and biological treatment of weak wastewater (BCDEAMOX). |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|