| Title |
The Use and Growth Characteristics of Duckweed( Lemna Species ) for Nutrient Removal of Biologically Treated Swine Wastewater (2) |
| Authors |
김병욱(Byoung Ug Kim),박미란(Mi Ran Park),임재명(Jay Myoung Rim) |
| Abstract |
This study aims to treat anaerobic digested effluent of high strength swine wastewater using duckweed as aquatic macrophyte and observe growth characteristics of duckweed according to variable influent loadings. Nutrient removal characteristics with influent loadings are as follows. In the case of nitrogen, removal efficiency was above 70 % and effluent concentration was below 10.0 ㎎/L when the influent ammonia loading was about 1.0gN/㎡/day. In the case of phosphorus, when the influent ortho phosphate loading was about 0.15gP/㎡/day, effluent concentration was below 2.0㎎/L and removal efficiency was above 55%. Also, crude protein and phosphorus content of duckweed biomass increased from 15.6% to 41.6% and from 0.8% to 1.6% with as increase of influent nutrient concentration, respectively. In general, duckweed could vegetate at high organic loadings as about 30 gTCOD/㎡/day, and organic removal rate was range of 30∼75% during operating periods. |