영양염류의 농도와 수리학적체류시간에 따른 달뿌리풀의 질소ㆍ인 흡수 실험 결과로서 NH4-N, NO3-N, PO4-P의 흡수량은 각각 체류시간에 따라 유의한 영향을 미쳤으며(F=44.93, 95.52, 12.70, Pm2, 평균 수질농도 0.308 NH4-N, 1.461 NO3-N, 0.348 PO4-P mg/L, 체류시 간 1일~ 5일 범위에서 1 m2 1일 기준의 흡수량이 각각 7.31~20.15 NH4

Seaweeds are received high attending as one of new and renewable energy sources. In this study, the effects of organic loading rate (OLR) and hydraulic retention time (HRT) on anaerobic digestion with Laminaria japonica were investigated using labrotory-scale semi-continuous stirred type reactors. The results demonstrated that anaerobic digestion of Laminaria japonica performed stably with OLRs in the range of 1.00 ~ 1.50 g-VS/L⋅d and HRTs in the range of 27 ~ 40 days. The maximum methane production obtained was 251.33 mL-CH4/L⋅d, which was achieved for an OLR of 1.50 g-VS/L⋅d and a HRT of 27 days. However, an OLR of 1.75 g-VS/L⋅d and a HRT of 23 days brought about a decrease in the pH and volatile fatty acids (VFAs) accumulation, causing the destabilization of the reactor and process failure. The reactors operated at a constant influent substrate concentration, i.e., 40 g-VS/L, thus OLR and HRT could not be treated separately and independently. According to the limited results of this study, it seems that the suitable OLR of anaerobic digestion of Laminaria japonica was lower than 1.50 g-VS/L⋅d and suitable HRT was higher than 27 days.

Process intensification without any increase in bed requires the exploitation of fluid mechanical phenomena as the basis for elegant solutions to the process engineering problems which result from the need to retain and control the immobilized biomass, and for biomass recovery. The fluidized bed biological reactor provides a solution to these needs. The wastewater treatment characteristics of the fluidized bed was filled with sand media. Indirect aeration were studied experimentally. The researcher was filled with sand particle size(0.60∼0.42mm) in three reactors with different section area(A)/height(H), in the state BOD loading 4.5㎏-BOD5/㎥·d, and under the fixed state of hydraulic retention time for around 32 minutes.