Biological denitrifying phosphorus removal in SBR: effect of added nitrateconcentration and sludge retention time

Authors
Merzouki, M Bernet, N Delgenes, JP Moletta, R Benlemlih, M
Citation
M. Merzouki et al., Biological denitrifying phosphorus removal in SBR: effect of added nitrateconcentration and sludge retention time, WATER SCI T, 43(3), 2001, pp. 191-194
Citations number
8
Categorie Soggetti
Environment/Ecology
Journal title
WATER SCIENCE AND TECHNOLOGY
ISSN journal
02731223 → ACNP
Volume
43
Issue
3
Year of publication
2001
Pages
191 - 194
Database
ISI
SICI code
0273-1223(2001)43:3<191:BDPRIS>2.0.ZU;2-F
Abstract
Optimizing anoxic biological phosphorus removal in the anaerobic-anoxic seq uencing batch reactor (A(2) SBR) was observed to depend on two parameters: the amount of added nitrate and the sludge retention time (SRT). The concen tration of 120 mg N-NO3 . l(-1) in the anoxic medium and the SRT oi 16 days were determined as optimal for a complete phosphorus removal in the A, SBR . The reactor was supplied with synthetic wastewater containing 800 mg COD. I-1 acetic acid, 240 mg N-NH4 . I-1 and 30 mg P-PO4 . l(-1). This study was completed by microscopic observations which revealed three morphological t ypes of phosphate-accumulating bacteria (PAB).