การบำบัดน้ำเสียจากโรงฟอกหนังโดยใช้กระบวนการกรองที่มีเศษหินแกรนิตเป็นสารกรอง / สมรศรี กันภัย = Tannery wastewater treatment using filtration with granite rock as filter media / Samornsri Kanphai
The study of tannery wastewater treatment could be classified into 2 types : the filtration of highly intensed wastewater and the filtration of lowly intensed wastewater which was treated by the activated sludge treatment. The significant parameters in the study were as following : pH, turbidity, COD and total chromium. From the study ; when the treatment of highly intensed wastewater treated by primeary treatment with alum compare with filter media size at filtration rate 2 and 4 m3/m2hr, the result was 0.42-0.60 mm and 1.40-1.60 mm that the appropriate filtration rate of the 0.42-0.60 mm filter media was 2m3/m2hr. Smaller filter media could remove the more of turbidity, COD, and total chromium more effectively. When the lowly intensed wastewater was filtered by three sizes of filter media: 0.42-0.60 mm, 1.00-1.40 mm, 1.40-1.70 mm at filtration rate 2, 4 and 8 m3/m2hr, the result was that 0.42-0.60 mm was the appropriate size of filter media at 2 m3/m2hr was the appropriate filtration rate. The quantity offiltered water was 96 m3/m2. The filter run at that filtration rate of three sizes media were 48 hr.
