온도와 반응시간이 활성 조류공정에 미치는 영향

Abstract

1962 Ross. E. Mckinney proposed activated algae process that combines the algae growth characteristics to the concept of activated sludge process. This process can be applied to wastewater treatment by the interaction of the organic matter decomposition of bacteria and photosynthesis of algae are currently research is being conducted. In this study, a constant ratio of algae and bacteria was to evaluate the impact on the water quality and the effects of treatment at organic matter and nutrients as function of temperature and detention time. Algae(Chlorella sp.) used in the experiment were cultured using JM medium, the bacteria in the activated sludge itself was used as a biological nutrient removal process in operation in lab. The experimental conditions were the ratio of algae and bacteria at 0.625(650mg-MLSS/L) in the LED light(1,500 lux) condition, the temperature range is 22 ∼ 34 ℃, the detention time range is 6 ∼ 24 hour in total 20 case on batch reactor. It placed the differences in sampling in order to evaluates the impact on water quality and the effects of treatment. In the water quality results, the pH phenomenon appeared increase-decrease-increase, DO concentration showed a high increase at 22 ℃, Turbidity showed dcrease-increase. In the properties of algae and bacteria results, Chlorophyll-a showed a high increase at 22 ℃, MLSS, MLVSS showed a phenomenon in which increase in reaction proceeds, as MLVSS of algae to increase MLVSS of bacteria is decreased. In treatment results, Turbidity, MLSS, MLVSS showed a phenomenon in which the increase in the reduction of the precipitation effect due to the increase in the algae. Referring to the organic material, TCOD and SCOD showed a removal efficiency of 83, 95 % in 21 hour, NH4-N showed a removal efficiency of more 73 % in 21 hour, in the case of NO3-N represents an increase of 2 times. For PO4-P showed the removal efficiency of about 10 %.