A floc-based model for simultaneous biological removal of carbon, nitrogen and phosphorous - application to piggery effluent
|Authors||Barford, John P.
Wong, C. H.
|Source||Proceedings of the Asia-pacific Chemical Reaction Engineering Symposium "APCRE 99", Hong Kong SAR, China, The Hong Kong University of Science and Technology, Hong Kong SAR, China , 13-16 June 1999, p. 371-376|
|Summary||Currently the accepted practice for swine wastewater disposal is land application after stabilisation in a lagoon. This disposal method can exacerbate odour emissions, contributes to soil contamination and eutrophication of waterways. Intensification of the pig industry has increased the impact of individual piggeries; this combined with tightening legislation is causing the pig industry in Australia to look at alternative treatment methods. A pilot scale sequencing batch reactor (SBR) was built to treat piggery wastewater and achieved NH4<sup>+</sup> and odour reductions of greater than 99% as well as 80% removal of COD and as high as a 60% reduction of PO<sub>4</sub><sup>3-</sup>. The optimization problem of anaerobic and aerobic cycle times of a sequencing batch reactor (SBR) for biological carbon and phosphorus removal was examined using a dynamic mathematical model. The model showed that there exists an optimum combination of anaerobic and aerobic cycle times for a SBR treating municipal and industrial wastewater.|
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