| Title |
Unit Loadings from the Cattlehide Tannery |
| Authors |
임연택 ; 이형진 ; 류재근 ; 서윤수 ( Yeon Taek Rim ; Hyung Jin Lee ; Jae Keun Ryu ; Yoon Soo Suh ) |
| Abstract |
The unit mass discharge (UMD) of the volume of wastewater and some major pollutants loadings and the characteristic of wastewater from the cattlehide tannery, which can be used as a indirect parameter in controlling industrial use of water and wastewater, were investigated. The results are as follows. 1. Average concentrations of BOD, COD and SS in the wastewater from the cattlehide tannery were 2,063 ㎎/ℓ, 1,721 ㎎/ℓ and 2,187 ㎎/ℓ, respectively. The ratio of BOD and COD was 1.2 : 1. 2. Average removal efficiencies of BOD, COD and SS by domestic wastewater treatment plants were 94%, 93% and 96%, respectively. 3. On the basis of the number of employee (per capita) and the weight (ton) of raw materials and products, UMDs (Y, ㎥) of the volume of wastewater from the tannery were Y= 1,514.4X-77,888 (R²=0.936), Y=37.440X-24,159 (R²=0.914) and Y=519.05X-20,693 (R² = 0.962), respectively. From these results, UMDs showed to correlate highly with these three units, but did not correlate with the building area and the sale amount. 4. UMDs (Y, Kg) of BOD loading on the basis of employee, raw material and product were Y = 3,792.7X - 258,747 (R² = 0.885), Y = 95.880X - 139,619 (R² = 0.904) and Y= 1,303.6X- 117,389 (R²=0.915), respectively, so the correlation between UMDs and these three units was highly significant. In the UMDs of COD loading, these correlations were highly shown, also, but on the basis of building area and sale amount, these were not shown. 5. UMDs (Y, Kg) of SS loading on employee, raw material and product were Y = 4,584X-321,989 (R²=0.754), Y=125.74X-250,019 (R²=0.906) and Y = 1,648.6X - 189.185 (R² = 0.853), respectively. From these results, UMDs were shown to correlate highly only with these three units. |