Startup and Stabilization of Nitrosation in an Anoxic-aerobic Continuous-flow Reactor with Granules - Details

Author：

Li, Dong (Li, Dong.) (Scholars：李冬) | Guo, Yue-Zhou (Guo, Yue-Zhou.) | Lao, Hui-Mei (Lao, Hui-Mei.) | Cao, Mei-Zhong (Cao, Mei-Zhong.) | Zhang, Jie (Zhang, Jie.)

Indexed by：

EI Scopus PKU PubMed CSCD

Abstract：

Matured　nitrosation　granules　were　inoculated　to　an　anoxic-aerobic　continuous-flow　reactor　at　room　temperature　(17-19).　The　startup　and　stabilization　of　nitrosation　with　granules　were　studied.　The　results　show　that　the　nitrosation　of　the　continuous-flow　was　successfully　achieved　with　an　average　nitrite　accumulation　rate　(NAR)　above　95%.　With　the　increase　of　the　dissolved　oxygen　(DO)　content　from　(3±0.2)　to　(4.5±0.2)　mg•L-1　in　the　aerobic　zone,　the　NAR　remained　above　95%.　The　effect　of　the　hydraulic　retention　time　(HRT)　of　the　continuous-flow　reactor　was　investigated.　The　short　HRT　(8.4　h)　sped　up　the　circulation　of　the　sludge　particles　in　the　continuous-flow　system　such　that　the　broken　granular　sludge　could　not　be　integrated　in　time,　resulting　in　the　deterioration　of　granular　sludge　settling　and　the　loss　of　sludge　granules.　The　performance　of　the　system　was　restored　with　the　increase　of　the　HRT　to　12.2　h　and　the　continuous-flow　system　stabilized.　The　ammonia　removal　efficiency　and　NAR　were　86.7%　and　96.2%　on　day　166,　respectively.　©　2019,　Science　Press.　All　right　reserved.

Keyword：

Deterioration Nitration Granulation Ammonia Granular materials Dissolved oxygen Stabilization

Author Community：

[ 1 ] [Li, Dong]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Guo, Yue-Zhou]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Lao, Hui-Mei]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Cao, Mei-Zhong]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Zhang, Jie]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Zhang, Jie]State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin; 150090, China