| Title |
Advanced Biological Treatment of Industrial Wastewater using Food Waste Leachate as an External Carbon Source: Full-Scale Experiment |
| Authors |
이병철 ( Byeong Cheol Lee ) ; 안조환 ( Jo Hwan Ahn ) ; 이정훈 ( Jung Hun Lee ) ; 배우근 ( Woo Keun Bae ) |
| Keywords |
Biological nutrient removal; BOD/N ratio; External carbon source; Food waste Leachate; Industrial wastewater |
| Abstract |
The feasibility of utilizing food waste leachate as an external carbon source was tested to enhance biological nutrient removal from an industrial wastewater with an average flow rate of 164,800 m3/d and a low carbon/nitrogen ratio of 2.8. A considerable improvement in the removal of nitrogen and phosphorus was observed when a certain amount of the leachate, ranging from 70 to 142 m3/d, was supplemented to the biological industrial wastewater treatment process. The addition of the leachate led to an increase in the BOD/N ratio (4.5) and the removal efficiency of nutritents from 29.7% to 71.7% for nitrogen and from 34.8% to 65.6% for phosphorus. However, an excessive dose of the leachate that significantly exceeded 120 m3/d caused serious operational problems, like oil-layer formation in the grit chamber and scum layer in the primary clarifier. Thus, an supplement of food waste leachate at a dose acceptable to an existing facilities can be a practical and effective means to enhance the nutrient removal from industrial wastewater and to dispose of the food waste leachate. |