| Title |
Fermentation of Food Waste and Utilization as External Carbon Source in Nitrogen and phosphorus removal process |
| Authors |
박승국(Seung Kook Park),김병군(Byung Goon Kim),서인석(In Seok Seo),이상일(Sang Ill Lee) |
| Abstract |
Recently, major concerns in the area of environmental engineering have been the effective treatment of waste, and removal of nutrients for public health. Therefore, this study was initiated to evaluate the potential utilization of fermented food waste as external carbon sources for nitrogen and phosphorus removal in wastewater, eventually recycling of useful sources from wastes. Especially, we evaluated the effects of the environmental parameters on the production of fermented organic acids and the denitrification and phosphorous removal by addition of the fermented food waste. Initial concentration of total solid (TS) contained in the diluted food wastes was 78,000 ㎎/L. It was observed that the mixing and adjustment of pH in fermentation process were major factors in producing the fermented organic acids. When fermented organic acids were used as external carbon sources, total denitrification and phosphorous release rates were 5.62 ㎎NOx-N/gVSS ·hr and 3.89 ㎎PO₄-P/gVSS ·hr, respectively. These rates were similar to, or even higher than those in the case of acetate. Especially, the fermented food wastes having more than 200 of C/N ratio after fermentation proved to be excellent external carbon sources. Furthermore, it seems that the same sources of external carbon can be used in removing N and P of wastewater. |