Center of Excellence on Environmental Health and Toxicology (EHT)
| This research aimed to investigate the management of waste and wastewater in the slaughterhouse wastewater treatment system at a pilot scale and to investigate the recovery of nutrients from the effluent of sludge digestion system. The experiment was devised into 3 parts, including nutrient removal, nutrient release, and nutrient recovery and struvite precipitation. The results found that the removal efficiencies of COD, TKN, and TP from AnA2/O2 SBR process at pilot scale were more than 90%, consistent with the laboratory studies. While the enhanced SRT improved the mobility of microbial groups, which resulted in a better biological reaction. For a nutrient recovery process, the preliminary results showed that the anaerobic sludge digestion (ASD) process caused the decomposition of organic matter in the sludge. It stabilized and reduced the volume of sludge before final disposal. In which the enhanced SRT improved the performance of the process and led to better decay. Conversely, the release of nutrients in sludge are decreased with increased SRT. While the MAP process reduced the concentration of nutrients accumulated in the supernatant of ASD process due to the combination of NH4+ and PO43- with Mg2+ as the crystals. Moreover, the formation of crystallization is increased through increasing the pH and the ratio of magnesium, ammonium, and phosphate concentrations in solution.แหล่งข้อมูล:
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