Cultivation and maintenance of nitrite-oxidizing bacteria granular sludge in SBR process - Details

Author：

Liu, Xu (Liu, Xu.) | Wang, Shuying (Wang, Shuying.) (Scholars：王淑莹) | Peng, Yongzhen (Peng, Yongzhen.) (Scholars：彭永臻) | Wu, Lei (Wu, Lei.)

Indexed by：

EI Scopus

Abstract：

A　SBR　inoculated　with　nitrifying　activated　sludge　was　employed　to　cultivate　granular　sludge.　Under　the　selective　pressure　of　settling　time,　the　formation　of　nitrite　oxidizing　bacteria　granules　were　achieved　by　increasing　NO　-2-N　concentration　from　25　mg/L　to　75　mg/L　within　120　cycles.　The　granules　were　shaped　like　sphere　with　diameter　ranging　from　0.5　to　0.9mm,　an　average　settling　velocity　of　2.4　cm/s,　and　the　sludge　volume　index　was　46.5ml/g.　As　the　granules　was　operated　stably,　the　nitrite　oxidization　rate　was　around　0.119　mg　NO2--N/mg　MLSS·h.　The　enrichment　of　nitrite　oxidization　granules　was　quantified　by　FISH　which　indicated　that　nitrite　oxidizing　bacteria　was　16.1%　of　the　total　bacteria.　It　is　indicated　that　the　oxidizing　nitrite　granules　was　cultured　successfully.　©　2011　IEEE.

Keyword：

Bacteria Granulation Remote sensing Activated sludge process Granular materials

Author Community：

[ 1 ] [Liu, Xu]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
[ 2 ] [Wang, Shuying]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
[ 3 ] [Peng, Yongzhen]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
[ 4 ] [Wu, Lei]Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China