| Title |
Municipal Sewerage Treatment by the Fluidized Biofilm Reactor with Waste Tire Carrier |
| Authors |
송준상 ; 문형극 ; 이홍근 ( Jun Sang Song ; Hyung Keuk Moon ; Hong Keun Lee ) |
| Abstract |
Samkwang Aqua-Clear, Inc. has developed the fluidized bed biofilm method using the SAC Bio-Carrier made of waste tire powder and called Bio-SAC Process. The removal rate of organic matter of this method can treat the wastewater 4 times faster than the conventional activated sludge method and it has specially designed aerobic bio-reactor filled with 20% SAC Bio-carrier of the volume of reactor. We have done the application research for the municipal sewerage treatment and the results are summarized as follows: The removal rate of biochemical oxygen demand(BOD) and chemical oxygen demand(COD-Mn) was around 90% and the Hydraulic retention time(HRT) of the aerobic bio-reactor is 1.5 hours. Although the suspended solids(SS) concentration of raw water was very high and varied widely because this method has no primary sedimentation tank, its concentration of the effluent is only around 10㎎/L. Also nitrification reaction was occurred and the removal rate of total kjeldahl nitrogen(TKN) was around 80% during the short HRT. The removal rate of total phosphorus was around 70% with chemical coagulation process using the alum and polymer. Its rate was higher than that of the conventional activated sludge method. The bio-film microorganism grew abundantly on the surface of the SAC Bio-carrier. Epistylis spp. was observed as a predominant species, and the depth of the biofilm was 0.3∼1.0㎜. This species is one of the peritrichita that grow well in the aerobic reactor at the good treatment condition. The treatment coefficient(T₁) of Bio-SAC^R process from the Grau`s multicomponent degradation model was four times higher than that of the activated sludge method. This SAC treatment method can not only reduced the 50% of the building area of the wastewater treatment plant, but also reduced the 20% of the capital cost. Because the removal rate of the total phosphorus is much higher than the activated sludge method, this treatment method is more effective process as the tool of the prevention method for the point source control of the eutrophication. |