Effects of Nitrite Dosing Modes on Sludge Fermentation Performance [亚硝酸盐投加方式对剩余污泥发酵性能的影响] - 文章详情页

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To　investigate　the　effect　of　nitrite　dosage　on　enhancing　excess　sludge　fermentation,　the　performance　of　the　nitrite　addition　on　excess　sludge　fermentation　and　degradation　was　compared　under　different　dosing　strategies,　including　once,　batch　and　continuous　dosing.In　this　study,　nitrite　solutions　of　the　same　amount　were　added　to　three　sequencing　batch　reactors　(SBR)　in　three　different　modes　to　enhance　sludge　fermentation　for　7　d.　The　experimental　results　show　that　under　one-time　addition　mode,　highest　peak　value　of　nitrite　accumulation　is　observed.　The　reduction　of　total　chemical　oxygen　demand　(TCOD)　and　the　accumulation　of　soluble　chemical　oxygen　demand　(SCOD)　are　most　significant　among　these　reactors,　indicating　that　high　concentration　nitrite　effectively　promotes　the　conversion　of　sludge　particulate　organic　matter　into　dissolved　organic　matter.　For　the　strategy　of　continuously　dosing,　no　nitrite　accumulation　is　observed　but　the　volatile　suspended　solids　(VSS)　of　the　sludge　present　a　greater　reduction　rate.Moreover,　dewatering　ability　is　improved　when　the　sludge　was　treated　under　continuous　nitrite　feeding,　which　is　beneficial　for　a　further　sludge　reduction.　This　study　indicates　that　the　mode　of　continuous　addition　of　nitrite　is　favorable　for　enhancing　activated　sludge　reduction.　©　2019,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.

关键词：

Dewatering; Dosing modes; Nitrite; Sludge fermentation; Sludge reduction

作者机构：

[ 1 ] [Peng, Y.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Peng, Y.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China
[ 3 ] [Wang, X.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Wang, X.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China
[ 5 ] [Zhang, L.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Zhang, L.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China
[ 7 ] [Li, J.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
[ 8 ] [Li, J.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China
[ 9 ] [Yang, S.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
[ 10 ] [Yang, S.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China
[ 11 ] [Zhang, Q.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
[ 12 ] [Zhang, Q.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China
[ 13 ] [Meng, Q.]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
[ 14 ] [Meng, Q.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing, 100124, China

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