Utilization of magnetic GAC adsorbent for the removal of COD and BOD parameters in tofu wastewater

Abstract

Abstract The tofu industry in Indonesia has mainly not processed its waste before it is discharged into the environment. This study seeks to ascertain the effectiveness of granular activated carbon magnetic adsorbents in removing pollutant characteristics from tofu wastewater. The effectiveness of the allowance resulting from the processing procedure will be assessed using variations in the mass of magnetic granular activated carbon and adsorption time. Granular Activated Carbon (GAC) and magnetic GAC production are activated using a modified green coprecipitation approach. Tofu wastewater samples used in this study contained COD of 5080 mg/L and BOD of 828 mg/L. The magnetic GAC variations with an adsorbent mass of 7.5 g/L and an absorption duration of 60 minutes, a COD value of 2930 mg/L, and an allowance ability of 42.32%, have the best ability to remove COD, according to the research done for the COD test. The allowed for the BOD parameters that produced the best results was 345 mg/L, and the 45-minute absorption time treatment with a GAC concentration of 10 g/L resulted in a removal efficiency of 58.38%.