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All Journal Eksergi Journal Of Chemical Process Engineering (JCPE) INTEK: Jurnal Penelitian
Mimin Septiani
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering

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EFEKTIVITAS ASAM NITRAT (HNO3) SEBAGAI PELARUT ALTERNATIF PADA PROSES ACID WASH TERHADAP PLATE ELECTROLYZER DI PT KALTIM NITRATE INDONESIA Mimin Septiani; Kurniawan Santoso; Rafdi Abdul Majid
Journal of Chemical Process Engineering Vol 3, No 2 (2018)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (667.387 KB) | DOI: 10.33536/jcpe.v3i2.258

Abstract

Proses acid wash di electrochloronation merupakan proses pembersihan kerak menggunakan pelarut asam. Asam Chlorida (HCl) adalah pelarut asam yang paling umum digunakan untuk melarutkan kerak CaCO3. Penelitian ini bertujuan menentukan konsentrasi optimum HNO3 sebagai pelarut alternatif dengan mengkaji efektifitasnya menggunakan HCl sebagai pembanding. Sampel kerak diambil dari plate electrolyzer sebanyak 5 gram. Larutan HNO3 dan HCl diencerkan dalam beberapa variabel konsentrasi, 2%; 3%; 4%; 5%; dan 6%. Sampel CaCO3 dilarutkan dengan HNO3 dan HCl kemudian dihitung jumlah kerak yang terlarut. Banyaknya zat terlarut berbeda sesuai dengan konsentrasi pelarut.Hasil penelitian ini menunjukkan HCl dengan konsentrasi 3% tingkat kemolaran 0,83 M mampu melarutkan sebanyak 76,07% dari total sample kerak dan HNO3 dengan konsentrasi 5% tingkat kemolaran 0,81 M juga mampu melarutkan sebanyak 76,04% dari total sampel kerak CaCO3. Sehingga HNO3 dianggap mampu menjadi pelarut alteratif.
Biogas Fermentation from Vegetable Waste and Horse Rumen Involving Effective Microorganism-4 (EM4) Mimin Septiani; Irhamni Nuhardin; Arief Muliawan
INTEK: Jurnal Penelitian Vol 7, No 1 (2020): April 2020
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (298.775 KB) | DOI: 10.31963/intek.v7i1.2086

Abstract

A vegetable waste is an organic matter that contains cellulose which potential to be processed into biogas with anaerobic fermentation process. The aims of this research are to find out how long time to produce biogas from vegetable waste and horse Rumen by using EM4, what does the effect of the addition of EM4 to the biogas yield and the content of the produced gas. Vegetables waste and Rumen rasio 1:1 (500g:500g). Water Content of 500g. Addition variable of EM4 in each digester are 0 ml, 50 ml, 100 ml, 150 ml dan 200 ml. Fermentation process takes time about 3 to 15 days.  This result shows that the average time of fermentation lasts up to 11 days. The addition of 150 ml EM4 generate the highest pressure, come to 322.801 Pa, capable of producing the highest biogas yield of 0.2679 % with CO2content of 5.15 %.
Kajian Isoterm Adsorpsi Linear Alkilbenzena Sulfonate (LAS) dalam Limbah Cair Detergen Menggunakan Biosorben Ampas Kopi dan Ampas Kelapa Mimin Septiani; Zakiyah Darajat; Muhammad Arham Yunus; Maria Assumpta Nogo Ole; Zuhrotul Fikri Ilma
Eksergi Vol 20, No 2 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i2.9955

Abstract

One of the efforts to minimize the impact of detergent waste pollution is by adsorption using coffee dregs and coconut dregs adsorbents. The purpose of this study was to determine the optimum mass of coffee grounds and coconut pulp as adsorbents, to compare the effectiveness of their absorption in decreasing levels of Linear Alkyl Benzene Sulfonate, and to study their adsorption isotherm models. This research was conducted in batches with variations in the mass of each adsorbent, namely 1 gram, 2 grams, 3 grams, 4 grams and 5 grams. This research was conducted in batches with variations in the mass of each adsorbent, namely 1 gram, 2 grams, 3 grams, 4 grams and 5 grams. The detergent waste samples were contacted with the adsorbent for 30 minutes and then the absorption capacity was tested using the Methylene Blue test method. The results showed that the optimum absorption of LAS content from coffee grounds and coconut pulp adsorbents occurred at a mass of 2 grams with the greatest increase in absorption efficiency index Coconut dregs adsorbent is more effective than coffee dregs because it can absorb up to 37%, while coffee dregs are only 10% with the same adsorbent mass of 5 grams. The adsorption isotherm model of the 2 types of adsorbents refers to the Langmuir equilibrium with R2 values for coffee grounds 0.8651 and coconut pulp 0.9868.
Co-Authors Arief Muliawan, Arief Kurniawan Santoso Maria Assumpta Nogo Ole Muhammad Arham Yunus Nuhardin, Irhamni Rafdi Abdul Majid Zakiyah Darajat Zuhrotul Fikri Ilma