Biological denitrifying phosphorus removal in SBR: effect of added nitrate concentration and sludge retention time-Reference-Cited by-同舟云学术

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

Published:2001-02-01 Issue:3 Volume:43 Page:191-194
ISSN:0273-1223
Container-title:Water Science and Technology
language:en
Short-container-title:

Author:

Merzouki M.¹,Bernet N.¹,Deigenès J.-P.¹,Moletta R.¹,Benlemlih M.²

Affiliation:

1. INRA, Laboratoire de Biotechnologie de l'Environnement (LBE), Avenue des Etangs, 11100 Narbonne, France

2. Laboratoire de Microbiologie de l'Environnement, FacultE des Sciences Dhar Mehraz, B.P. 1796 Fes, Maroc

Abstract

Optimizing anoxic biological phosphorus removal in the anaerobic-anoxic sequencing batch reactor (A2 SBR) was observed to depend on two parameters: the amount of added nitrate and the sludge retention time (SRT). The concentration of 120 mg N-NO3 · l-1 in the anoxic medium and the SRT of 15 days were determined as optimal for a complete phosphorus removal in the A2 SBR. The reactor was supplied with synthetic wastewater containing 800 mg COD.l-1 acetic acid, 240 mg N-NH4·l-1 and 30 mg P-PO4·l-1. This study was completed by microscopic observations which revealed three morphological types of phosphate-accumulating bacteria (PAB).

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

Link

http://iwaponline.com/wst/article-pdf/43/3/191/429349/191.pdf

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