GREYWATER TREATMENT USING COCONUT SHELL ACTIVATED CARBON

ABSTRACT

The aim of this project was to treat greywater using coconut shell activated carbon (CSAC). Greywater (laundry and bath) was collected from a household and treated with different dose of coconut shell activated carbon and also varied for different contact time.

Greywater was obtained from the laundry and bathing, and taken to the lab for analysis. Coconut shell activated carbon was prepared using CaCl₂.Batch experiment were then conducted to investigate the impact of dosages (0.25-2g) and contact time (15-360 mins) on the treatment process.

The parameters studied before and after treatment show that as the CSAC dose increased there was a decrease in COD levels from 544 mg/l to 394 mg/l, turbidity from 43.22NTU to 23.65NTU and TSS from 10 mg/l to <1.0 mg/l. As the contact time increase, the COD level decreased from 482 mg/l to 414 mg/l, turbidity level decreased from 32.04NTU to 26.66NTU and TSS decreased from 60 mg/l to <1.0 mg/l. The maximum removal efficiencies o theimpact of dose on the removal efficiency of CSAC were observed at turbidity 80.44%, TSS 99.99% and COD 81.93%. The maximum removal efficiencies o theimpact of contact time on the removal efficiency of CSAC were observed at turbidity 79.79%, TSS 99.99% and COD 81.01%. This study has demonstrated the potential of coconut shell activated carbon in untreated greywater.