Biological treatment of high concentration NO2--N in passivation washing wastewater and process control strategy - Details

Author：

Dong, Yijun (Dong, Yijun.) | Wang, Shuying (Wang, Shuying.) (Scholars：王淑莹) | Zhang, Yukun (Zhang, Yukun.) | Peng, Yongzhen (Peng, Yongzhen.) (Scholars：彭永臻)

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EI Scopus PKU CSCD

Abstract：

Biological　treatment　of　high　concentration　NO2--N　in　passivation　washing　wastewater　is　difficult.　In　this　paper　nitrite　oxidizing　bacteria　(NOB)　was　enriched　by　feeding　NO2--N　wastewater,　NOB-rich　activated　sludge　was　used　in　an　SBR　system　to　treat　simulated　passivation　washing　wastewater,　and　a　process　control　strategy　was　put　forward.　The　results　showed　that　using　the　process　passivation　washing　wastewater　with　NO2--N　concentration　2000　mg·L-1　could　be　totally　oxidized　within　300　min.　The　nitrite　oxidation　process　was　not　inhibited　by　the　high　NO2--N　concentration.　Furthermore,　this　process　had　a　correlation　with　the　variation　of　DO　concentration　during　reaction.　DO-MSC,　a　parameter　of　the　process　control　strategy,　indicated　the　end　of　the　reaction　when　it　was　more　than　0.02.　The　results　of　batch　tests　showed　that　the　DO-MSC　could　indicate　the　end　of　the　nitrite　oxidation　process　both　in　different　aeration　rates　(0.02-0.125　m3·h-1)　and　different　temperature　(15-30).　©　All　Rights　Reserved.

Keyword：

Temperature Biological water treatment Process control Washing Bacteria Oxidation Wastewater Biochemical engineering Wastewater treatment Activated sludge process Passivation Nitrogen oxides Water aeration Concentration (process)

Author Community：

[ 1 ] [Dong, Yijun]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing ; 100124, China
[ 2 ] [Wang, Shuying]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing ; 100124, China
[ 3 ] [Zhang, Yukun]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing ; 100124, China
[ 4 ] [Peng, Yongzhen]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing ; 100124, China

Reprint Author's Address：

王淑莹
[wang, shuying]key laboratory of beijing for water quality science and water environment recovery engineering, engineering research center of beijing, beijing university of technology, beijing ; 100124, china

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