PEMANFAATAN AMPAS TAHU SEBAGAI ARANG AKTIF DALAM MENURUNKAN KADAR COD, NITRIT DAN NITRAT PADA LIMBAH CAIR INDUSTRI TAHU

Abstract

Utilization of dregs as activated charcoal in lowering COD, Nitrite and Nitrate in tofu industry liquid waste. This research has been conducted to know the variation of time and pH value on decreasing COD, Nitrite and Nitrate from wastewater tofu by using dye technique from tofu waste as activated charcoal. The result of ANOVA analysis that Fcount is smaller than Ftable means there is positive influence at contact time 0-30 minutes while 30-60 min have negative effect to decrease COD, Nitrite and Nitrate level in tofu industry liquid waste. At pH value Fcount smaller than Ftabel means there is positive influence on pH value that is COD pH 7, Nitrite pH 5, Nitrate pH 7 while at alkaline pH (9 and 11) have negative effect to decreasing COD, Nitrite and Nitrate on industrial liquid waste tofu.

Keywords: Active Charcoal, COD, Nitrite, Nitrate and Industrial Tofu Liquid Waste.