title: Swine wastewater treatment using attached-growth and suspended-growth two stage sequencing batch reactors with real-time control.
abstract: Two two-stage sequencing batch reactors (TSSBR), one attached-growth and one suspended-growth, were operated under three levels of wastewater concentration (approximately 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 suspended-growth 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 approximately 4,000 mg/L runs with final effluent at 4.0 and 21.3 mg/L, respectively.
authors.affiliation: Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, Canada.
authors.forename: N
authors.initials: N
authors.lastname: Cheng
authors.forename: K V
authors.initials: KV
authors.lastname: Lo
authors.forename: K H
authors.initials: KH
authors.lastname: Yip
mesh_terms: D000818:Animals; D019149:Bioreactors; D004867:Equipment Design; D006863:Hydrogen-Ion Concentration; D008372:Manure / Q000382:microbiology; D009566:Nitrates / Q000494:pharmacology; D010084:Oxidation-Reduction; D010101:Oxygen Consumption; D010710:Phosphates / Q000494:pharmacology; D012988:Soil Microbiology; D013552:Swine; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants / Q000378:metabolism*; D014876:Water Pollution / Q000032:analysis; D018508:Water Purification
chemical_list: D008372:Manure; D009566:Nitrates; D010710:Phosphates; D014873:Water Pollutants