Metode Permukaan Respon dan Aplikasinya pada Pengolahan Air Limbah Lindi Hitam dengan Menggunakan Reaksi Fenton

Ajeng Arum Sari; Muryanto; Hasbi Yasin

doi:10.21771/jrtppi.2017.v8.no1.p23-34

Authors

Ajeng Arum Sari Research Center for Chemistry, Indonesian Institute of Sciences
Muryanto Research Center for Chemistry, Indonesian Institute of Sciences
Hasbi Yasin Departemen Statistika, Universitas Diponegoro

DOI:

https://doi.org/10.21771/jrtppi.2017.v8.no1.p23-34

Keywords:

dekolorisasi lindi hitam, fenton, metode permukaan respon, desain komposit pusat

Abstract

Pembuatan bioetanol dari tandan kosong kelapa sawit menghasilkan lindi hitam dengan karakteristik nilai COD tinggi dan nilai oksigen terlarut rendah. Lignin sebagai senyawa utama dalam lindi hitam dapat didegradasi dengan menggunakan oksidasi tinggi dari sistem radikal OH seperti metode Fenton. Setelah itu, lindi hitam tersebut dapat didekolorisasi. Tujuan penelitian ini adalah untuk mengetahui kondisi optimum variabel pH, konsentrasi FeSO₄, dan konsentrasi H₂O₂ untuk mendekolorisasi lindi hitam dengan menggunakan metode desain komposit pusat. FeSO₄ dan H2O2 digunakan untuk reagen Fenton. Proses pengadukan dilakukan di jar test dengan kecepatan 200 rpm selama 10 menit, kemudian kecepatan pengadukan diturunkan hingga 50 rpm selama 2 jam, dan disedimentasi 24 jam. Dekolorisasi tertinggi lindi hitam diperoleh sebesar 53% pada pH 13 dengan perbandingan volume H₂O₂ dan FeSO₄ 1: 1. Metode Fenton mampu mendekolorisasi air limbah lindi hitam dari proses bioetanol sebesar 52% pada pH 13 dengan rasio volume Metode permukaan respon merupakan metode yang baik untuk mengoptimasi variabel-variabel sehingga mampu meningkatkan efisiensi dekolorisasi air limbah lindi hitam. Dekolorisasi air limbah lindi hitam dapat ditingkatkan hingga mencapai 73% apabila pH, konsentrasi FeSO₄, dan konsentrasi H₂O₂ yang digunakan masing-masing sebesar 6,64; 0,1 mM, dan 3,68 mM. Hal ini menunjukkan bahwa metode Fenton mempunyai potensi dalam mengatasi permasalahan air limbah lindi hitam pada proses pembuatan bioetanol.

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