STUDYING ON THE APPLICATION OF SPENT COFFEE CHAR FOR THE TREATMENT OF COLOURANTS AND ORGANIC IN DYEING WASTEWATER
Trịnh Thị Thu Hương
Vũ Đức Thảo
Abstract
After anoxic pyrolysis process at 500 degrees for 7 hours, char of spent coffee grounds was used to test its adsorption capacity for some pollutants in wastewater. For the Direct red 23 simulated wastewater, research results indicated that the color removal efficiency was 96,5 % , COD removal efficiency was 42,2%. These results might be possitive information of a new approach to treat the wastewater using spentcoffee grounds char.
