Piggery wastewater treatment using SBR system with used inner tube of heavy truck tyre as moving-bed
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Abstract
At present, swine farming has been expanded continuously in responding to increasing demands of both domestically and internationally. Swine farming creates piggery wastewater that is highly polluted, with high organic loading and foul odors causing distress to the community. Most of the wastewater treatment systems used in Thailand are biological treatment systems that occupy a large area of construction and some systems may also cause a disturbing odor. As such, the characterization of piggery wastewater often occurs in batches. So, this research used a sequencing batch reactor (SBR) treatment system that requires less space for construction and uses less energy for the treatment processes. The research aimed at (1) comparing between the conventional SBR system (non-media) and moving-bed sequencing batch biofilm reactor (MSBBR) treatment system using the inner tube of heavy trucks (10 wheels truck) tires as the moving-beds for forming biofilm; and (2) studying the appropriate water retention time (HRT) using a variety of 1.5, 3, and 5 days for treating the wastewater. Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Kjeldahl Nitrogen (TKN), and Suspended Solids (SS) were analyzed. Research results showed that performance resulted from the MSBBR system was much better than that of the conventional system with the percentages of reduction of BOD, COD, TKN, and SS being 66.7, 86.8, 81.2, and 69.2, respectively. The appropriated HRT was 5 days resulted in the treated effluent concentrations of COD, TKN, SS and pH passing the standard criteria for piggery wastewater control from swine farms.
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