PENGARUH WAKTU FERMENTASI TERHADAP VOLUME GAS BIO DAN PENYISIHAN COD DENGAN METODE PERLAKUANAWAL MENGGUNAKAN KALIUMHIDROKSIDA(KOH) PADA ECENG GONDOK (Eichhornia crassipes)

Abstract

The purpose of this study was to determine the effect of alkali pre-treatment methods on the quality and quantity of biogas. The study was doneby fermentation process the water hyacinth with KOH in a concentration of 6,7 M; 4 M;3 M; and 2,95 (M) with water in ratio hyacinth: water 70:30; 50:50; 30:70 and 100:0 (v/v) mixed with cow dung starter in an anaerobic digester batch system of 2,5 L capacity.  In this study the highest biogas production at KOH concentration  4 M was in ratio of 50:50 (v/v)with yield biogas volume  449 mL and 86,52% of COD revomal, 92,42% of TSS removal. The lowest biogas production at KOH concentration 6,7 M was in ratio of 70:30 (v/v) with yield biogas volume 132 mL and 86,55% of COD removal and 88,65%of TSS removal.