Pemodelan matematis pengurangan COD dalam air limbah industri penyamakan kulit secara adsorpsi kontinyu menggunakan abu terbang bagas

Agus Prasetya, Sarto Sarto, Muhammad Sholeh

Abstract


ABSTRACT
The objective of this research was to obtain suitable mathematical model for Chemical
Oxygen Demand (COD) removal originated from tannery wastewater using bagasse fly ash in
continuous system. In the column experiment, effect of flowrate, concentration of wastewater,
and bulk density were studied. Three models: Adams-Bohart, Thomas, and Yan were applied to
experimental data to predict the breakthrough curve. The best model was evaluated using
correlation coefficients. Yan model was found to give the most accurate to describe dynamic
behavior of the column experiment. The best result was obtained at flowrate of 100 mL/min,
concentration of 400 mg/L, and bulk density of 61 g/L. The Yan kinetic constant (k ) and the Y
adsorption capacity (q ) were 0.3210 mL/mg/min and 17.0947 mg/g respectively and the Y
correlation coefficient obtained was 0.9379.


Keywords: Chemical Oxygen Demand, tannery wastewater, bagasse fly ash, adsorption


ABSTRAK
pengurangan COD dalam air limbah industri penyamakan kulit mengunakan abu terbang bagas
secara kontinyu. Variasi percobaan adsorpsi dalam kolom yang dilakukan yaitu: kecepatan aliran
air limbah, konsentrasi air limbah, dan bobot isi. Persamaan Adams-Bohart, Thomas, dan Yan
diaplikasikan ke data percobaan untuk memprediksikan kurva breakthrough. Koefisien korelasi
digunakan untuk mengevaluasi model terbaik. Proses pengurangan COD dengan abu terbang
bagas secara kontinyu dalam kolom paling cocok dimodelkan dengan model Yan. Hasil terbaik
diperoleh pada kecepatan aliran air limbah 100 mL/menit, konsentrasi air limbah 400 mg/L, dan
bobot isi 61 g/L. Parameter konstanta kinetika (k ) dan kapasitas adsorpsi (q ) yang diperoleh Y Y
berturut-turut sebesar 0,3210 mL/mg/menit dan 17,0947 mg/g dengan nilai koefisien korelasi
yang didapatkan yaitu 0,9379.


Kata kunci: Chemical Oxygen Demand, air limbah industri penyamakan kulit, abu terbang bagas,
adsorpsi


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DOI: http://dx.doi.org/10.20543/mkkp.v29i1.214

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