PENGARUH WAKTU FERMENTASI TERHADAP PERSENTASE PENYISIHAN CHEMICAL OXYGEN DEMAND (COD) CAMPURAN LIMBAH CAIR INDUSTRI TAPIOKA DAN AIR

Abstract

Study about the effect of fermentation time on the percentage removal of chemical oxygen demand (COD) a mixture of tapioca liquid industrial waste and water that aims to determine the effect of water quality and quantity of bio-gas generated from tapioca industrial wastewater combined with water. The research was conducted by combining tapioca industrial wastewater with water on several compositions, namely 100: 0; 85:15; 65:35; 50:50; 35:65; 15:85 (v / v) with cow dung starter in the batch anaerobic digester systems for 24 days with a neutral pH. The optimum percentage of allowance for COD at the ratio of tapioca  liquid industrial waste and water at  15:85 with a value of 42.14% where the value of COD on day 0 was 1723 mg / L after day 24 was 997 mg / L .