Feasibility of a pulsed sequencing batch reactor with anaerobic aggregated biomass for the treatment of low strength wastewaters

• Type: Article in International Scientific Journal
• Date: 1997

Authors

Brito, AG (Author) Other; Rodrigues, AC (Author) Other; L. F. Melo (Author) Other

Journal

Title: Water Science and Technology

Vol. 35 No. 1

Pages: 193-198

ISSN: 0273-1223

Publisher: IWA PUBLISHING

Indexing

ISI Web of Knowledge - 38 Citations

ISI Web of Science

Scopus - 44 Citations

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Other information

Authenticus ID: P-001-D1K

DOI: 10.1016/s0273-1223(96)00896-7

Abstract (EN): This study concerns an assessment of a SBR operation that associates anaerobic aggregated biomass with a pulsed action during the reaction phase, a system named Pulsed Sequencing Batch Reactor (P-SBR). The system uses a diaphragm pump as a pulsator unit to increase the liquid-solid contact, in order to avoid dead zones and possible external mass transfer resistance. A preliminary study of the operation of the reactor was performed with a low strength synthetic wastewater with a COD near 1000 mg.l(-1) and a sub-optimal temperature of 22 degrees C. A removal efficiency of 60-70% was attained after 5 and 6 hours of reaction time. The respective organic loads were 5-6 kg COD.m(-3).day(-1), thus supporting the feasibility of the P-SBR system for wastewater treatment in such conditions. The results also indicate that a ratio of 1.8 parts per thousand between the swept volume delivered by the pump and the reactor volume was adequate to promote a flow turbulence in the sludge blanket and that a redox potential of near -400 mV was readily created by anaerobic bacteria after the reactor filling step. Copyright (C) 1996 IAWQ.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6