The quality control laboratory of the department of agroindustrial technology produces a lot of liquid waste that has not been maximally treated. The study aimed to determine the effectiveness of the adsorbent in treatment wastewater by filtration and adsorption methods. Zeolite, activated charcoal, and sand, with a ratio of 1: 1: 1, are used as adsorbents. One liter of liquid waste was inserted into the filter and gradually repeated up to five times so that the filtrate P1, P2, P3, P4, and P5 were obtained. Liquid waste before treatment and after treatment with adsorbent was analyzed include Total dissolved solids (TDS), Total suspended solids (TSS), Chemical oxygen demand (COD), and pH. The results showed that adsorbent effectively reduced up to 40%, 80%, 58%, of TDS, TSS, and COD of liquid waste, Respectively. This adsorbent is very effective as a laboratory-scale waste treatment even though it has not met regulations.