Partial nitrosification in biofilter for sewage with low ammonia at room temperature - Details

Author：

Wang, Jun-An (Wang, Jun-An.) | Li, Dong (Li, Dong.) (Scholars：李冬) | Zhang, Jie (Zhang, Jie.) | Li, Zhan (Li, Zhan.) | Tao, Xiao-Xiao (Tao, Xiao-Xiao.)

Indexed by：

EI Scopus PKU CSCD

Abstract：

A　biofilter　reactor　filled　with　lava　as　a　carrier　is　used　under　the　condition　of　room　temperature　(8-25°C)　and　low　ρ(NH4+-N)　(60-90　mg/L).　The　NO2--N　is　accumulated　through　the　method　of　aeration　control　in　the　reactor,　and　its　accumulation　rate　can　reach　more　than　80%　after　startup.　Results　show　that　DO　control　is　the　main　approach　for　realizing　nitrosification　whereas　the　restraining　of　free　ammonia　can　be　the　assistant　method　for　choosing　ammonia　oxidization　bacteria　(AOB),　and　HRT　adjusting　is　the　key　way　to　control　the　result　of　ρ(NH4+-N)　/　ρ(NO2--N).　According　to　the　experiment　result,　the　changes　of　ρ(NH4+-N),　ρ(NO2--N),　and　ρ(NO3--N)　all　have　the　dynamics　characteristics　of　zero-grade　reaction.　Furthermore,　the　conversion　rate　of　NH4+-N　is　4.32　mg/(L·h),　and　the　accumulation　rates　of　NO2--N　and　NO3--N　are　3.05　and　0.40　mg/(L·h),　respectively.　Accordingly,　the　HRT　for　partial　nitrosification　should　be　controlled　from　9　to　14　h.

Keyword：

Sewage Ammonia Biofilters Wastewater treatment Nitrogen removal Nitrogen oxides

Author Community：

[ 1 ] [Wang, Jun-An]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Wang, Jun-An]Technology Research and Development Center, Beijing Sound Environmental Protection Group, Beijing 101102, China
[ 3 ] [Li, Dong]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Zhang, Jie]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Li, Zhan]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Tao, Xiao-Xiao]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China