| Abstract |
| This study was performed to composite an optimal water reuse system through comparison between the SFC system combining a Biofilter and Biofilter＋RO process and 2nd treatment process＋Sand filter combining a GAC or BAC and RO process. The turbidity, BOD, color, and COD of effluent in the SFC system which depends on the stabilization and flocculator, clarifier and biofilter show 0.9-1.6 NTU, 7.5㎎/L, 11.3-15.8 unit, and 12.3㎎/L respectively. This process can possibly be considered as a water reuse system. The SFC-Biofilter system is regulated the standard of reuse water quality. SFC-Biofilter combining RO process has been investigated a new method of the water reuse system for improved water quality in other to achive C1^(-) ion removal effectively. Turbidity, BOD, Color, and COD of effluent in SFC-Biofilter + RO system generally shows 0.30-0.52 NTU, 0.4-1.9㎎/L, 0.2-0.38unit 0.34-0.57㎎/L respectively, and also the standards of reuse water quality have been applied to the water qualiEing system for the dyeing industry, as Cl-ion concentration is regulated the range of 7.52-9.21 ㎎/L. To estimate economic advantages of the SFC-Biofilter, it have been studied for the comparison of secondary treatment system combining the Sand filter, GAC or BAC process, to the water reuse system, using the total HRT. The HRT of the Stabilization basin, Flocculator. Clafier and Biofilter in the SFC-Biofilter system have been observed as 1.0, 0.67, 1.7, and 0.33hr respectively. The total HRT was observed 3.7 hr. But as HRT of Biofilter. Clafier, Sand filter and GAC in secondary treatment system combining with the Sand filter, GAC, and BAC process was observed 7.0, 3.0, 0.2, and 0.25hr respectively, total HRT is this system was 10.45hr. The SFC-Biofilter reuse system is resulted in more economic process than the secondary treatment system combining with Sand filter, GAC or BAC, since the HRT is shorter. |
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| Key Words |
| SFC system, Stabilization-Flocculation-Clarification, Biofilter, Reverse Osmosis, Sand filter, GAC, BAC |
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