Effect of NO2- on waste activated sludge hydrolysis and acidification under typical acidic and alkaline conditions - Details

Author：

Wang, Bo (Wang, Bo.) (Scholars：王波) | Wang, Shu-Ying (Wang, Shu-Ying.) (Scholars：王淑莹) | Yuan, Yue (Yuan, Yue.) | Peng, Yong-Zhen (Peng, Yong-Zhen.) (Scholars：彭永臻)

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EI Scopus PKU CSCD

Abstract：

Effect　of　NO2-　on　waste　activated　sludge　waste　activated　sludge　(WAS)　hydrolysis　and　acidification　at　pH　5.0　and　9.0　with　35　temperature　was　investigated.　The　result　indicated　that　WAS　hydrolysis　with　nitrite　addition　was　enhanced　accompanied　by　the　increment　of　total　SCOD　and　acidic　condition　was　better　than　alkaline　condition　for　hydrolysis　with　the　increase　of　time.　On　the　28th　day,　the　order　of　total　SCOD　was　B1　(pH=5　with　NO2-　addition)　＞　B2　(pH=9　with　NO2-　addition)　＞　B4　(pH=9　without　NO2-　addition)　＞　B3　(pH=5　without　NO2-　addition).　The　maximum　total　volatile　fatty　acids　(TVFAs)　in　B1,　B2,　B3,　B4　were　4476,　4303,　1350　and　2921　mg/L,　which　indicated　that　acidification　was　also　improved　with　nitrite　addition,　and　the　effect　was　better　at　acidic　condition.　Moreover,　the　released　ammonia　nitrogen　was　decreased　significantly　under　nitrite-added　and　acidic　condition.

Keyword：

Volatile fatty acids Hydrolysis Ammonia pH Acidification Nitrogen oxides Alkalinity

Author Community：

[ 1 ] [Wang, Bo]Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing ; 100124, China
[ 2 ] [Wang, Shu-Ying]Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing ; 100124, China
[ 3 ] [Yuan, Yue]Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing ; 100124, China
[ 4 ] [Peng, Yong-Zhen]Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing ; 100124, China

Reprint Author's Address：

彭永臻
[peng, yong-zhen]engineering research center of beijing, key laboratory of beijing for water quality science and water environment recovery engineering, beijing university of technology, beijing ; 100124, china

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