| Title |
The Use and Growth Characteristics of Duckweed ( Lemna Species ) for Nutrient Removal of Biologically Treated Swine Wastewater ( I ) |
| Authors |
박미란(Mi Ran Park),김병욱(Byoung Ug Kim),임재영(Jay Myoung Rim) |
| Abstract |
This study was performed to investigate nutrient removal characteristics of swine wastewater using duckweed as floating aquatic plant, and growth characteristics of duckweed with retention time. As the result of experiments. nutrient removal efficiency was very high in a retention time of 3 days, and was more than 90 % on the all operation conditions in a retention time of 10 days. Growth rate was most effected by the change of retention time. Growth rate was very high as 0.280 day^(-1) in a retention time of 3 days. Growth rate decreased gradually as retention time increased, so it was very low as 0.084 day^(-1) when a retention time was 10 days. Crude protein content was very high with ranges of from 23.9 % to 37.6 % as dry content during operating periods. Consequently, duckweed can be used to treat the swine wastewater and its biomass can be used for the alternative protein source as animal food, very effectively. |