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

Umayi Belladiana (Departemen Teknik Kimia, Fakultas Teknik Universitas Sumatera Utara)
Wan Rizki Ansari (Departemen Teknik Kimia, Fakultas Teknik Universitas Sumatera Utara)
Setiaty Pandia (Departemen Teknik Kimia, Fakultas Teknik Universitas Sumatera Utara)

Jurnal Teknik Kimia USU
Vol. 3 No. 3 (2014): Jurnal Teknik Kimia USU

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 .