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Journal of Environmental Science and Health, Part B
Pesticides, Food Contaminants, and Agricultural Wastes
Volume 36, 2001 - Issue 2
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Original Articles

SWINE WASTEWATER TREATMENT USING ATTACHED-GROWTH AND SUSPENDED-GROWTH TWO STAGE SEQUENCING BATCH REACTORS WITH REAL-TIME CONTROL

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Pages 189-207 | Received 20 Jul 2000, Published online: 19 Aug 2006
 

Abstract

Two two-stage sequencing batch reactors (TSSBR), one attached-growth and one suspended-growth, were operated under three levels of wastewater concentration (≈ 4,000, 2,000 and 500 TOC mg/L), respectively, to compare the pH and ORP (oxidation-reduction potential) patterns and system performance. In both TSSBR systems, the pH and ORP profiles varied with organic loading yet exhibited consistent patterns with distinctive features suitable for real-time control. For all runs at the three levels of influent, both systems achieved similar levels of treatment for BOD5, TOC and TSS of over 97.5, 93.4, and 97.3 %, respectively. The attached-growth system out performed the suspendedgrowth system in achieving the same levels of treatment at much shorter aeration cycle times.

The treatment efficiency for NO3 N and PO4 −3 was greatly affected by the carbon content in the wastewater, and the best treatment was achieved during the TOC ≈ 4,000 mg/L runs with final effluent at 4.0 and 21.3 mg/L, respectively.

ACKNOWLEDGMENT

The funding for this research was provided by the Natural Science and Engineering Research Council Canada.

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