Waste water purification using new porous ceramics prepared by recycling waste glass and bamboo charcoal

Abstract

Abstract New porous ceramics (PC) prepared by recycling waste glass bottle of soft drinks (80 mass%) and bamboo charcoal (20 mass%) without any binder was applied to the waste water purification under aeration at 25 °C. Artificial waste water (15 L) containing 10 mL of milk was examined by combining 15 mL of activated sludge and 750 g of PC. Biochemical oxygen demand (BOD) showed a marked decrease from 178 to 4.0 (±0.1) mg L−1 in 5 days and to 2.0 (±0.1) mg L−1 in 7 days, which was equal to the Environmental Standard for the river water (class A) in Japan. Similarly, chemical oxygen demand (COD) decreased from 158 to 3.6 (±0.1) mg L−1 in 5 days and to 2.2 (±0.1) mg L−1 in 9 days, which was less than the Environmental Standard for the Seawater (class B) in Japan: 3.0 mg L−1. These results prove the high water purification ability of the PC, which will be effectively utilized for the purification of drinking water, fish preserve water, fish farm water, etc.

Keywords

• Water purification
• Porous ceramics
• Recycling
• Waste glass
• Bamboo charcoal