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All Journal Journal of Research and Technology Envirotek : Jurnal Ilmiah Teknik Lingkungan
Laurentius Urip Widodo
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Chemical Engineering, Chemistry & Bioengineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering

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Pengolahan Limbah Cair Industri Elektroplating dengan Proses Flotasi Menggunakan Methyl Ester Sulfonate (MES) sebagai Collector Laurentius Urip Widodo; Sholekhah, Bika Amalia; Hubbi Hikmatu Ilma
Journal of Research and Technology Vol. 7 No. 2 (2021): JRT Volume 7 No 2 Des 2021
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Industrial waste is a major problem for countries that are developing large industries such as Indonesia. Industrial waste with heavy metal content such as electroplating waste cannot be disposed of directly into the water because it can cause environmental pollution. Therefore, further processing is needed to reduce or eliminate metal levels in the waste water. In this study, the method used to reduce Cu metal content in electroplating waste is using the flotation method. Flotation is the process of separating minerals or ions through flotation with the help of air bubbles to the surface of the water. The parameters observed in this study were the effect of pH and collector on % Cu removal. Experiments were carried out with waste water feed containing Cu metal with an initial concentration of 107.6 mg/L, with a variation of pH 4,5,6,7,8 and a variation of the concentration of 200 mg/L, 300 mg/L, 400 mg/L, 500 mg/L and 600 mg/L of collector. After being analysed using Atomic Absorption Spectrophotometer (AAS), the best% Cu removal at pH 6 conditions and 300 mg/L methyl ester sulfonate (MES) concentration was 67.19%.
PEMANFAATAN ECENG GONDOK MENJADI BIOETANOL DENGAN PROSES FERMENTASI Mohammad Yudhistira Firmansyah; Dwi Darmawan Wahyudi; Laurentius Urip Widodo
Envirotek : Jurnal Ilmiah Teknik Lingkungan Vol 14 No 1 (2022): Envirotek : Jurnal Ilmiah Teknik Lingkungan
Publisher : Program Studi Teknik Lingkungan, Universitas Pembangunan Nasional Veteran Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.653 KB) | DOI: 10.33005/envirotek.v14i1.191

Abstract

Indonesia mempunyai iklim yang mendukung untuk tumbuhnya eceng gondok (Eichornia Crasipess), maka ketersediaan eceng gondok di Indonesia sangat banyak. Eceng gondok termasuk dalam tanaman yang jarang sekali dimanfaatkan. Kandungan selulosa yang dimiliki oleh tanaman eceng gondok sebesar 64,51% dan kandungan lignin sebesar 7,69%. Kandungan selulosa yang terdapat di dalam eceng gondok ini lah yang dapat dimanfaatkan untuk pembuatan bioethanol. Tujuan penelitian ini untuk mengetahui kondisi ideal fermentasi eceng gondok. Terdapat tiga proses yang dilakukan untuk membuat bioethanol yaitu delignifikasi, hidrolisis, dan fermentasi. Proses delignifikasi menggunakan larutan NaOH 10 % yang bertujuan untuk menghilangkan kadar lignin. Hasil dari proses delignifikasi dilakukan proses hidrolisis yang menggunakan larutan H₂SO₄ 5% dengan tujuan untuk mengubah selulosa menjadi glukosa. Selanjutnya selama : 3, 5, 7, 9, dan 11 hari sebagai variabel waktu dalam proses fermentasi serta massa ragi (Saccharomyces Cerevisiae) : 3, 4, 5, 6, dan 7 gram yang disertai dengan penambahan pupuk NPK dan Urea sebagai nutrient dalam proses fermentasi. Hasil terbaik setelah diuji menggunakan alat Gas Chromatography (GC) didapatkan pada kondisi fermentasi selama 7 hari dan massa Saccharomyces Cerevisiae sebesar 6 gram dengan penambahan pupuk NPK dan Urea, didapatkan hasil kadar etanol sebesar 0,528 %.
Pengolahan Limbah Cair Industri Elektroplating dengan Proses Flotasi Menggunakan Methyl Ester Sulfonate (MES) sebagai Collector Laurentius Urip Widodo; Sholekhah, Bika Amalia; Hubbi Hikmatu Ilma
Journal of Research and Technology Vol. 7 No. 2 (2021): JRT Volume 7 No 2 Des 2021
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v7i2.380

Abstract

Industrial waste is a major problem for countries that are developing large industries such as Indonesia. Industrial waste with heavy metal content such as electroplating waste cannot be disposed of directly into the water because it can cause environmental pollution. Therefore, further processing is needed to reduce or eliminate metal levels in the waste water. In this study, the method used to reduce Cu metal content in electroplating waste is using the flotation method. Flotation is the process of separating minerals or ions through flotation with the help of air bubbles to the surface of the water. The parameters observed in this study were the effect of pH and collector on % Cu removal. Experiments were carried out with waste water feed containing Cu metal with an initial concentration of 107.6 mg/L, with a variation of pH 4,5,6,7,8 and a variation of the concentration of 200 mg/L, 300 mg/L, 400 mg/L, 500 mg/L and 600 mg/L of collector. After being analysed using Atomic Absorption Spectrophotometer (AAS), the best% Cu removal at pH 6 conditions and 300 mg/L methyl ester sulfonate (MES) concentration was 67.19%.
Co-Authors Dwi Darmawan Wahyudi Hubbi Hikmatu Ilma Mohammad Yudhistira Firmansyah Sholekhah, Bika Amalia