| Title |
A Study on the Estimation of Water Pollutants Reduction Ratio in Livestock Manure Fertilization |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.6.722 |
| Keywords |
Compost; Liquid fertilizer; Livestock manure fertilization; Pollutant reduction ratio; TOC (Total organic compound) |
| Abstract |
Livestock manure is known as the main cause of non-point pollutant in agricultural area. Pollutant reduction ratio of livestock manure recycling to fertilizers was measured in order to analyze the effect on water quality of Total Maximum Daily Load (TMDL) system in Korea. The reduction ratio has been applied by theoretical consideration without survey and there is no value for TOC newly introducing organic item. The reduction ratio of each pollutant from this study was revealed as follows; TOC, BOD, T-N and T-P were 0.34, 0.60, 0.37, and 0.42 for individual farm and 0.38, 0.61, 0.45 and 0.44 for entrustment facilities, respectively. The reduction ratio of individual farm was surveyed as TOC 0.63, BOD 0.62, T-N 0.42 and T-P 0.32 for liquid fertilizer and TOC 0.30, BOD 0.64, T-N 0.40 and T-P 0.48 for compost. Total reduction ratio was derived by multiplying the ratio for liquid fertilizer and compost by the respective load. Compared to the pollutant reduction ratio of the individual farm with entrustment facilities marking the higher in liquid fertilizer and the lower in compost. Through this study, we found the difference of pollutant reduction ratio between livestock manure recycling method and facilities. Although phosphorus known as a preservative matter, the treatment efficiency of T-P is analyzed to decrease by chemical precipitation. |