ABSTRACT: The
tofu industry is one of food industry which the product of organic waste to
environment pollution. One of alternative methode which used to overcome tofu
industrial waste water pollution is adsorption methode using activated carbon
from coffee waste. The aim of this researched is to know about the activated
carbon from coffee waste quality which observe of rendemen, water content, ash
content, and iodium adsorption, to know optimum contact of time and pH of
coffee waste to decrease ammonia, nitrite and nitrate contents in tofu industry
waste water and to know decrease percentage of ammonia, nitrite and nitrate
contents in tofu industrial waste water using activated carbon from coffee
waste. The activated carbon made by soaking of coffee waste in HCl 0.1 M
solution for 2 days. The activated carbon coaled in muffle furnace at
temperature 350°C. The activated carbon analyzed consist of rendemen, water
content, ash content, and iodium adsorption. Optimum contact of time and pH of
coffee waste determined in order to get optimum adsorption ammonia, nitrite and
nitrate in tofu industrial waste water. Contact time variation are 1, 10, 30,
45, 60, 90, 120 minutes and pH variation are 4, 5, 6, 7, 8, 9, 10. The result
showed that the activated carbon from coffee waste fulfill the criteria SNI
number 06-3730-1995. The activated carbon from coffee waste could be used to
decrease the ammonia, nitrite, and nitrate contents in tofu industrial waste
water at the optimum contact of time of 30 minutes and pH 7. Decreasing percentage
of ammonia, nitrite and nitrate contents in tofu industrial waste water are
64,69% , 52,35% and 86,40% respectively.
Keywords:
ammonia, nitrite, nitrate, tofu industry wastewater
Penulis: Irmanto,
Suyata
Kode
Jurnal: jpkimiadd090044
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