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Efficient treatment of dairy processing wastewater in a laboratory scale Intermittently Aerated Sequencing Batch Reactor (IASBR)

  • Peter Leonard (a1) (a2), Emma Tarpey (a1) (a2), William Finnegan (a1) (a2) and Xinmin Zhan (a1) (a2)
Abstract

This Research Communication describes an investigation into the viability of an Intermittently Aerated Sequencing Batch Reactor (IASBR) for the treatment of dairy processing wastewater at laboratory-scale. A number of operational parameters have been varied and the effect has been monitored in order to determine optimal conditions for maximising removal efficiencies. These operational parameters include Hydraulic Retention Time (HRT), Solids Retention Time (SRT), aeration rate and cycle length. Real dairy processing wastewater and synthetic wastewater have been treated using three laboratory-scale IASBR units in a temperature controlled room. When the operational conditions were established, the units were seeded using sludge from a municipal wastewater treatment plant for the first experiment, and sludge from a dairy processing factory for the second and third experiment. In experiment three, the reactors were fed on real wastewater from the wastewater treatment plant at this dairy processing factory. These laboratory-scale systems will be used to demonstrate over time that the IASBR system is a consistent, viable option for treatment of dairy processing wastewater in this sector. In this study, the capacity of a biological system to remove both nitrogen and phosphorus within one reactor will be demonstrated. The initial operational parameters for a pilot-scale IASBR system will be derived from the results of the study.

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Corresponding author
*For correspondence; e-mail: xinmin.zhan@nuigalway.ie
References
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APHA 2005 Standard Methods for the Examination of Water & Wastewater. Washington, DC, USA: American Public Health Association
Demirel, B, Yenigun, O & Onay, TT 2005 Anaerobic treatment of dairy wastewaters: a review. Process Biochemistry 40 25832595
Environmental Protection Agency 2008 BAT Guidance Note on Best Available Techniques for the Dairy Processing Sector.
Henry, LG 2014 Comparison of Intermittently Aerated Sequencing Batch Reactors (IASBRs) and Conventional Sequencing Batch Reactors (cSBRs) in Wastewater Treatment, PhD Thesis. Galway: National University of Ireland
Kushwaha, JP, Srivastava, VC & Mall, ID 2011 An overview of various technologies for the treatment of dairy wastewaters. Critical Reviews in Food Science and Nutrition 51 442452
Li, J, Healy, MG, Zhan, X, Norton, D, & Rodgers, M 2008 Effect of aeration rate on nutrient removal from slaughterhouse wastewater in intermittently aerated sequencing batch reactors. Water, Air, & Soil Pollution 192 251261
Pan, M, Chen, T, Hu, Z, & Zhan, X 2013 Assessment of nitrogen and phosphorus removal in an intermittently aerated sequencing batch reactor (IASBR) and a sequencing batch reactor (SBR). Water Science and Technology 68 400405
Pan, M, Henry, LG, Liu, R, Huang, X, & Zhan, X 2014 Nitrogen removal from slaughterhouse wastewater through partial nitrification followed by denitrification in intermittently aerated sequencing batch reactors at 11 °C. Environmental Technology (United Kingdom) 35 470477
Tarpey, E 2016 An Investigation into the Use of IASBRs for Treatment of Dairy Processing Wastewater, MEng Thesis. Galway: National University of Ireland
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Journal of Dairy Research
  • ISSN: 0022-0299
  • EISSN: 1469-7629
  • URL: /core/journals/journal-of-dairy-research
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