Treatment of rubber industrial wastewater using OPEFB (Oil Palm Empty Fruit Bunches) carbon adsorbent and biofilter S. cerevisiae has been conducted. This study aims to determine the effect of OPEFB carbon adsorbent and biofiltration time in the S. cerevisiae biofilter on decreasing the value of BOD, COD, TSS, ammonia, and total nitrogen. The 1000 mL waste treatment process is carried out using…