Recently, the generation of landfill leachate in Korea is rapidly growing, due to improvement of life quality and industrialization. Landfill leachate typically contains high concentrations of organic, and the characteristics of landfill leachate depe...
Recently, the generation of landfill leachate in Korea is rapidly growing, due to improvement of life quality and industrialization. Landfill leachate typically contains high concentrations of organic, and the characteristics of landfill leachate depends on the content of waste. In addition, it is not easy to apply a standardized approach for dealing with landfill leachate, since the amount and characteristics of them can change over time. In order to overcome these problems, culturing algae in landfill leachate has been suggested. advantages of this method are not only to use nutrients from leachate but also to be able to produce bio-diesel from algae.
This study was conducted for finding out the influence of landfill leachate alkalinity on the algae growth. The results were as follows;
1. When using algae Scenedesmus sp. for treatment of landfill leachate, pH was increased sharply to approximately pH 9 at the beginning of cultivation, and the number of algae from the moment reaching pH 9 was slowly reduced.
2. The most of nitrogen in the leachate present as the form of ammonia
nitrogen. In the case of maintaining samples at pH 9.3 with 25℃ by addition of NaOH, the growing trend of algae became increasingly weaker with increase of total alkalinity.
3. At pH 7 at 25°C by addition of HCl and at 1500 to 2500㎎ CaCO3/ℓ of total alkalinity, it reached the maximum number of algae about 81000/㎖ after 48 hours in culture.
4. At pH 7 at 25°C and at 1500 to 2500㎎ CaCO3/ℓ of total alkalinity, total nitrogen decreased by 80% (from 2416㎎/ℓ to 480~720㎎/ℓ), and total phosphorus decreased by 85% (from 9.4㎎/ℓ to 1.4㎎/ℓ) after the culturing algae within landfill leachate. However, the treatment effect of the Chemical Oxygen Demand(COD) was not obvious.