Denitrifying phosphate uptake of biological phosphorous removal granular sludge in SBR

The denitrification and excessive P removal can be realized by denitrifying phosphate-accumulating organisms (DNPAOs) under low carbon condition. DNPAOs use poly-3-hydroxy- butyrate (PHB) as electron donor, and use nitrate and nitrite as electron acceptor during the denitrifying phosphate uptake. In...

Full description

Saved in:
Bibliographic Details
Published inHuanjing kexue Vol. 29; no. 8; p. 2254
Main Authors Liu, Xiao-ying, Zhao, Hong-mei, Peng, Dang-cong, Sui, Xian-jie
Format Journal Article
LanguageChinese
Published China 01.08.2008
Subjects
Biodegradation, Environmental
Bioreactors - microbiology
Nitrogen - isolation & purification
Nitrogen - metabolism
Phosphates - isolation & purification
Phosphates - metabolism
Phosphorus - isolation & purification
Phosphorus - metabolism
Sewage - microbiology
Waste Disposal, Fluid - methods
Online AccessGet more information

Cover

More Information
Summary:The denitrification and excessive P removal can be realized by denitrifying phosphate-accumulating organisms (DNPAOs) under low carbon condition. DNPAOs use poly-3-hydroxy- butyrate (PHB) as electron donor, and use nitrate and nitrite as electron acceptor during the denitrifying phosphate uptake. In this study the biological phosphorus removal granular sludge was induced into the denitrifying and phosphate uptake granular sludge under an anaerobic/anoxic/aerobic alternating operation (referred to as an A/A/O) in a sequencing batch reactor (SBR). When the system is stable, the P and N removal ratio is over 90% and 93% respectively; the release phosphorus is 25-33 mg/L at anaerobic stage; 1g NOx-N approximately takes up P 1.3 g at anoxic stage. In the typical cycle the anaerobic maximum specific release phosphorus rate (max. SRPR) is 18.39 mg/(g x h); the anoxic max. specific uptake phosphorus rate (SUPR) and the max. specific denitrification rate (SDNR) is 23.72 mg/(g x h) and 18.19 mg/(g x h) respectively; th
ISSN:0250-3301