Sand has been used for long time to treat greywater. However, biochar might be anrnalternative to replace the sand for greywater treatment and also reduce the amount ofrnorganic waste disposed into the environment. In this study the biochar was produced fromrnbanana peel and the purpose was to evaluate and compare the performances of biochar,rnsand and sand with biochar in reducing turbidity, COD, N, P, fecal coliform and pH. Thernbiochar and sand were packed to a depth of 27 cm into columns with a diameter of 7 cmrnbut in case of sand with biochar the depth was 13.5 cm for sand and the remaining wasrnfilled by biochar. The columns were fed with synthetic and real greywater. Syntheticrngreywater was used for optimization of biochar particle size and pH. Real greywater wasrnfed to the column by taking the optimum biochar particle size and pH and compared with,rnsand and sand with biochar for four days. Biochar was prepared in three different sizes:rnFine, medium and coarse with a size of below 1mm, between 1-3 mm and above 3mm,rnrespectively. Fine particle size of biochar showed more removal efficiency than mediumrnand coarse sized particles. The average performance of fine medium and coarse particlernsize was 88%, 71.2% and 39.3% for turbidity 54.8%,36.5% and 23.1% for COD,62.2%,rn23.4% and 12.6% for N and 52%,18.4% and 9.4% for P respectively. But in all particle sizesrnof biochar effluent pH and EC values were found to be more than that of the influent. Forrnthe optimization of pH values that varied from 5 to 10 were tested. The results of thernanalysis showed that the highest removals of turbidity (89%), COD (55%), N (94%) and Prn(78.8%) were achieved at pH value of 7. Fine biochar (FBC) showed better removalrnefficiency when compared to that of sand and biochar with sand (FBCS). The averagernperformance efficiencies of FBC, sand and FBCS were 95%, 67%, and 79% for turbidity,rn81%, 19% and 56% for ammonium, 71%, 28% and 50% for phosphate 50 %, 61% andrn46% for COD and 90%, 80% and 87% for fecal coliform respectively. The findings of thisrnpaper indicate that transformation of banana peel into biochar has a double advantage ofrntreating greywater and minimizing the amount of waste that is disposed into thernenvironment.