Langmuir and Freundlich isotherm adsorption using activated charcoal from banana peel to reduce total suspended solid (TSS) levels in tofu industry liquid waste

Abstract The tofu industry is currently growing very rapidly both on a home scale and factory scale, in the process of making solid liquid waste are produced. Solid usually used for animal feed, while not treated. Tofu industrial contains high Total Suspended (TSS), if disposed directly into water it can pollute aquatic ecosystem. One way to reduce pollution use activated charcoal from plantain peels as adsorbent. This study aims determine appropriate adsorption isotherm model absorption level (TSS) wastewater with variations mass (100 grams; 200 grams 300 grams) time (20 minutes; 40 minutes).; 60 80 minutes 100 minutes). equation Langmuir Freundlich equation. experimental results show that largest TSS value adsorbed by contact minutes. suitable determining maximum capacity R 2 = 1. power was 51,8134 mg / L.