Rapid achievement of nitrogen removal via nitrite and nitrifying communities transfer by process optimization - Details

Author：

Li, Lingyun (Li, Lingyun.) | Peng, Yongzhen (Peng, Yongzhen.) (Scholars：彭永臻) | Wu, Lei (Wu, Lei.) | Wang, Shuying (Wang, Shuying.) (Scholars：王淑莹) | Li, Lun (Li, Lun.)

Indexed by：

EI Scopus

Abstract：

In　order　to　optimize　the　population　structure　of　nitrifying　bacteria,　several　factors　were　analyzed　in　this　paper　to　make　partial　nitrification　start　up.　Lab-scale　SBR　was　employed　to　treat　the　domestic　wastewater　of　low　COD/TN　ratio.　Steady　partial　nitrification　can　be　achieved　through　real-time　control　in　32　cycles　with　dissolved　oxygen　(DO)　1.80.1mg/L　and　SRT　7　days　at　30C.　The　nitrite　accumulation　rate　(NO2--　N　/NO　x--　N)　was　over　90%　under　the　premise　of　TN　removal　ratio　above　95%.　In　the　next　64　days,　the　system　was　also　successfully　operated　at　ambient　temperature　(20　∼　24C).　Fluorescent　in-situ　hybridization　(FISH)　analysis　showed　that　the　population　of　ammonia　oxidizing　bacteria　(AOB)　increased　by　58.9%　while　nitrite　oxidizing　bacteria(NOB)　decreased　by　83.2%　during　32　cycles.　NOB　can　be　gradually　washed　out　by　the　process　control　of　DO　and　aerobic　duration　based　on　DO　and　pH　on-line　sensors　so　steady　partial　nitrification　and　nitrogen　removal　efficiency　can　be　achieved　and　enhanced,　respectively.　©2009　IEEE.

Keyword：

Optimization Process control Dissolved oxygen Nitrification Bioinformatics Nitration Fish Wastewater treatment Bacteria Ammonia Real time control Biomedical engineering Nitrogen removal

Author Community：

[ 1 ] [Li, Lingyun]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, BJUT, Beijing University of Technology, Beijing, China
[ 2 ] [Peng, Yongzhen]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, BJUT, Beijing University of Technology, Beijing, China
[ 3 ] [Wu, Lei]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, BJUT, Beijing University of Technology, Beijing, China
[ 4 ] [Wang, Shuying]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, BJUT, Beijing University of Technology, Beijing, China
[ 5 ] [Li, Lun]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, BJUT, Beijing University of Technology, Beijing, China