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韓明鎬,李哲熙,朴永圭 嶺南大學校 環境問題硏究所 1990 環境硏究 Vol.9 No.2
The biological treatability of steel industry wastewater treated by an activated sludge process was evaluated by using continuous and batch biological activated carbon (BAC) reactor. The results are summarized as follows: 1. With respect to the hydraulic retention time and effluent water quality, the operating condition was found to be effective at the up flow velocity of 0.1m/h, when the initial concentration of COD was 108㎎/ℓ. The average removal efficiency of COD appeared to be 77% under the same condition. 2. Effluent COD was linearly increased with the COD volumetric loading rate up to approximately 1000g/㎥ day, and then the increasing rate of the effluent COD appeared to be substantially lowered. In addition, the overall substrate removal rate was found to be proportional to the effluent COD. 3. COD concentration at the one-half maximum growth rate of biofilm mass ㉿ and maximum COD utilization rate perunit mass of attached biofilm mass (k) were 66.5㎎/ℓ and 0.15 day?¹, respectively, which were estimated on the basis of data obtained in the batch reactor.