Pemanfaatan Serabut Kelapa Sebagai Biosorben Dalam Removal Cod Pada Limbah Cair Industri Pewarna Makanan

Abstract

The liquid waste of the food industry has recently increased. Therefore, when it is discharged into the waters, it will cause turbidity and can damage the ecosystem inside. One of the wastewater treatment techniques is absorption using biosorbents, one of which is made from coconut fiber to reduce the color intensity of the liquid waste. The purpose of this study was to determine the effects of the coconut fiber biosorbent on the color intensity, COD, and pH of the liquid waste of the food industry. In this research, the coconut fiber was delignified with a 2 M NaOH solution and then activated with a 3 N solution. The research variables consisted of the weight percentages of biosorbent by 1%, 2%, 3%, 4%, and 5%, and the contact time of 30 and 60 minutes with shaker stirring. Meanwhile, the most optimum results in COD removal happened at the addition of 4% for 60 minutes, from the initial COD of 1179 mg/L O2 to 780 mg/L O2 within the removal of 26.5%. The highest pH removal of 6.98 occurred in the variable addition of 1% for 30 minutes, whereas the lowest pH removal of 6.5

Adsorptive Removal of Chemical Oxygen Demand Using Eggshells and Tea Waste Entrapped in Calcium Alginate

“…The production of the biosorbent includes three steps: 1) eggshell and tea waste preparation into powder, 2) activation with H2SO4, and 3) immobilization of calcium alginate [3], [11], [12], [17]. The schematic of the initial preparation of eggshells and tea waste immobilized with calcium alginate as the bbiosorbentis presented in Figure 1, step 1.…”

“…According to data from the Ministry of Industry, batik exports from January to June 2019 reached 17.99 million US dollars and from January to July 2021 came 21.54 million US dollars [2]. The increasing demand is a driver of batik business expansion in Indonesia [3]. The increased batik industry in Indonesia is directly proportional to the rise in production and a large amount of waste left over from production.…”

“…Scientific studies on the use of eggshells and tea pulp as biosorbents have been widely carried out, such as the use of eggshells by purwaningsih [3] which investigates the mechanism of eggshell adsorption in reducing COD levels in waste leftovers from batik factory liquid production with egg shells as activated carbon activated with H2SO4. The results showed an optimal biosorbent mass of 5%, with COD levels falling by 87% with a contact time of 60 minutes.…”