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In Indonesia, there is a significant amount of sugarcane bagasse waste that has not been utilized optimally. Around 50% of sugarcane bagasse waste is discarded as waste with little economic value. Sugarcane bagasse contains lignocellulose, composed of 20% hemicellulose, 52.75% cellulose, 20% pentosan, and 37.55% lignin and converted into activated charcoal. Sugarcane bagasse can be used as an alternative raw material for activated charcoal by carbonizing it in a batch process to remove organic compounds from the waste. On this basis, a study was conducted to determine the effectiveness of bagasse activated charcoal in reducing the COD content of sasirangan waste and the optimal dose of bagasse activated charcoal as an adsorbent in reducing the COD content of sasirangan wastewater.The steps to make activated carbon are by place small pieces of bagasse in the mortar and place in a 350°C furnace for 2 hours or until the sample turns black. Next, bagasse charcoal was sieved until smooth using a 100-mesh sieve. The following stage is chemical activation. Bagasse that has passed through the sieve is soaked in 0.1 N 20% HCl activator for the day—cleansing the activated charcoal with distilled water until the pH is neutral. The next step is physical activation, which involves heating the activated charcoal in an oven at 105°C for six hours to dehydrate it. The results indicated that bagasse activated charcoal with a pH of 5 and a contact time of 90 minutes could reduce the COD content of the Sasirangan wastewater by up to 95.37 % and that the dose of bagasse activated charcoal as an adsorbent had a significant effect on the COD content. The quantity of 5 g/L is the maximum number of COD that can be absorbed. Keyword: Activated Charcoal, COD, sasirangan wastewater

Application of activated charcoal- sugarcane bagasse material for adsorption of COD (Chemical Oxygen Demand) on the sasirangan wastewater