Long-term operating performance of a poultry slaughterhouse wastewater treatment plant

V. Del Nery, I.R. de Nardi, M.H.R.Z. Damianovic, E. Pozzi, A.K.B. Amorim and M. Zaiat

Resources, Conservation & Recycling, 2007, vol. 50, issue 1, 102-114

Abstract: This paper evaluates the performance and process stability of a full-scale poultry slaughterhouse wastewater treatment plant in removing organic matter over a 4-year operation. The wastewater treatment system is composed of rotary and static screens, an equalization tank, a dissolved-air flotation (DAF) system and two upflow anaerobic sludge blanket (UASB) reactors. The operating strategy for UASB reactors to treat slaughterhouse wastewater involves the use of a tank to dampen fluctuations in flow and organic load, a DAF system to remove oil and grease (O&G) and suspended solids (SS) and an intermittent operation. Surface-loading rates of 1.6±0.4m3/m2h applied to the DAF system in the operation under study resulted in O&G and SS removal efficiencies of 51±16% and 37±16%, respectively. The organic loading rate of 1.6±0.4kgCOD/m3day and the upflow velocities of 0.3±0.1m/h applied to the UASB reactors resulted in a similar and satisfactory performance, showing total chemical oxygen demand and soluble chemical oxygen demand removal efficiencies of 67% and 85%, respectively. Although the organic matter removal efficiencies of the treatment plant reached about 90%, the nutrients concentrations in the treated effluent pointed to the need for advanced wastewater treatment.

Keywords: Dissolved-air flotation (DAF); Full-scale; Poultry slaughterhouse wastewater; Upflow anaerobic sludge blanket (UASB) reactor (search for similar items in EconPapers)
Date: 2007
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:recore:v:50:y:2007:i:1:p:102-114

DOI: 10.1016/j.resconrec.2006.06.001

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