Abstract
Using several types of wastewater from food plants and standard sugars, the adsorption isotherms of activated carbons were investigated.
1) 1/n values of COD determined with N/4 KMnO4 after heating for 10min. of wastewater were as follows: from corn starch factory 0.7-2.0, bean jam making factory 0.8-1.3 and modified starch factory 0.4-0.5.
And it was considered that 1/n values would be influenced substantially by the chemical composition of the wastewater.
2) The amouont of activated carbons required for removal of COD to 80% level in 100ml wastewater for corn starch and bean jam making factories were 3.0-4.0g and 1.44g respectively. Also, the amount of powdered and granular activated carbons for modified starch factory were 1.33g and 4.54g respectively.
3) The powdered activated-carbons were effective for the adsorption of maltose, raffinose and dextrin. However, the granular ones were not effective for dextrin among the tested sugars.
