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Proses Ekstraksi Asam Asetat dari Distilat Asap Cair Tempurung Kelapa Menggunakan Pelarut Etil Asetat Faham Partogi Siregar, Rory; Misran, Erni; Tri Cahyadi, Iman
Jurnal Teknik Kimia USU Vol. 8 No. 2 (2019): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v8i2.1964

Coconut shell is one of the most widely found biomass in Indonesia. It has potential to be utilized as raw material in producing liquid smoke. Liquid smoke is a distillate from pyrolysis of biomass. The distillate contains various compounds including acetic acid. This research is important to understand the effect of combined distillation and extraction on liquid smoke purificatian in obtaining acetic acid. The variation of solvent to feed ratio (2:1, 4:1, 6:1, dan 8:1) and temperature of extraction (30, 50, dan 70 Â°C) to obtain yield, acetic acid content, pH, and density which is the best among those of possible variable given. The objective of distillation is to separate the components with high boiling points such as tar. The main purpose of extraction is acetic acid recovery in order to obtain higher content of acetic acid in extract. The solvent in the process of extracting acetic acid is ethyl acetate. GC-MS analysis was also performed on this research to show composition of acetic acid from liquid smoke, distillate, and extract, which are all the composition of polar organic are also shown.

Studi Model Isoterm Adsorpsi Kristal Violet oleh Biosorben Kulit Ubi Kayu (Manihot esculenta) Ramadhan, Muhammad Dafin; Iriany; Misran, Erni; Turmuzi , Muhammad
Jurnal Teknik Kimia USU Vol. 10 No. 1 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v10i1.5485

Crystal violet is a dye that has many uses, but its waste can be harmful to humans and the environment. Adsorption is the most useful method for removing crystal violet waste compared to other separation methods because of its efficiency and viability. Cassava peel is a material that has potential to be an adsorbent. Cassava peel is suitable as an adsorbent because of its high cellulose, hemicellulose, and lignin content. In carrying out adsorption, getting the most appropriate isotherm model is important for predicting the adsorption parameters and the adsorbent system. This study aims to obtain an adsorption isotherm model that is the most suitable for the adsorption of crystal violet by cassava peel biosorbent with high accuracy and to obtain a combined model of the adsorption isotherm model that is the most suitable with the mass balance equation to predict removal efficiency. This research was conducted using secondary data using MATLAB as a supporting tool to perform a non-linear regression and Newton-Raphson iteration. In this research, we conclude that Sips model is the most suitable model with qms = 374,3 mg/g and 0,5933 site heterogeneity. For predict adsorbent mass ratio: adsorbate volume minimum ratio but removal efficiency stay at â‰¥ 90%, we obtain a correlation factor: m/V = -1.10-11Co4 + 2.10-8Co3 â€“ 2.10-5Co2 + 0.015Co + 1.2686.

Parameter Biokinetika dari Degradasi Limbah Kol dan Tomat Menggunakan Sistem Bioreaktor Anaerobik Sarah, Maya; Misran, Erni; Maulina, Seri; Pertiwi, Ika; Ritman, Nahlionny; Hasibuan, Isti Madinah; Parulian, Ihut
Jurnal Teknik Kimia USU Vol. 10 No. 2 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v10i2.5642

The world's energy supply is very dependent on non-renewable energy in the form of fossil fuels. This causes fossil fuels depletion and the need for alternative energy sources such as biogas. Biogas is produced from the fermentation process of organic matter with the help of anaerobic bacteria in free oxygen absence. This study aims to produce biogas from cabbage and tomato waste separately. Biogas production was carried out by varying feed concentrations of 100 g/L, 200 g/L, and 300 g/L for cabbage waste and 81.6 g/L; 215 g/L; and 237 g/L for tomato waste. This study consisted of 10 days seeding and acclimatization process, followed by a start-up stage using insulated anaerobic bioreactors. The largest methane from cabbage and tomato waste was 60% at a feed concentration of 200 g/L and 50% at a feed concentration of 237 g/L, respectively. The maximum growth rates (Âµm) for biogas from cabbage and tomato waste were 0.122 day-1 and 0.121 day-1, respectively.

Proses Ekstraksi Asam Asetat dari Distilat Asap Cair Tempurung Kelapa Menggunakan Pelarut Etil Asetat Faham Partogi Siregar, Rory; Misran, Erni; Tri Cahyadi, Iman
Jurnal Teknik Kimia USU Vol. 8 No. 2 (2019): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Coconut shell is one of the most widely found biomass in Indonesia. It has potential to be utilized as raw material in producing liquid smoke. Liquid smoke is a distillate from pyrolysis of biomass. The distillate contains various compounds including acetic acid. This research is important to understand the effect of combined distillation and extraction on liquid smoke purificatian in obtaining acetic acid. The variation of solvent to feed ratio (2:1, 4:1, 6:1, dan 8:1) and temperature of extraction (30, 50, dan 70 Â°C) to obtain yield, acetic acid content, pH, and density which is the best among those of possible variable given. The objective of distillation is to separate the components with high boiling points such as tar. The main purpose of extraction is acetic acid recovery in order to obtain higher content of acetic acid in extract. The solvent in the process of extracting acetic acid is ethyl acetate. GC-MS analysis was also performed on this research to show composition of acetic acid from liquid smoke, distillate, and extract, which are all the composition of polar organic are also shown.

Studi Model Isoterm Adsorpsi Kristal Violet oleh Biosorben Kulit Ubi Kayu (Manihot esculenta) Ramadhan, Muhammad Dafin; Iriany; Misran, Erni; Turmuzi , Muhammad
Jurnal Teknik Kimia USU Vol. 10 No. 1 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Crystal violet is a dye that has many uses, but its waste can be harmful to humans and the environment. Adsorption is the most useful method for removing crystal violet waste compared to other separation methods because of its efficiency and viability. Cassava peel is a material that has potential to be an adsorbent. Cassava peel is suitable as an adsorbent because of its high cellulose, hemicellulose, and lignin content. In carrying out adsorption, getting the most appropriate isotherm model is important for predicting the adsorption parameters and the adsorbent system. This study aims to obtain an adsorption isotherm model that is the most suitable for the adsorption of crystal violet by cassava peel biosorbent with high accuracy and to obtain a combined model of the adsorption isotherm model that is the most suitable with the mass balance equation to predict removal efficiency. This research was conducted using secondary data using MATLAB as a supporting tool to perform a non-linear regression and Newton-Raphson iteration. In this research, we conclude that Sips model is the most suitable model with qms = 374,3 mg/g and 0,5933 site heterogeneity. For predict adsorbent mass ratio: adsorbate volume minimum ratio but removal efficiency stay at â‰¥ 90%, we obtain a correlation factor: m/V = -1.10-11Co4 + 2.10-8Co3 â€“ 2.10-5Co2 + 0.015Co + 1.2686.

Parameter Biokinetika dari Degradasi Limbah Kol dan Tomat Menggunakan Sistem Bioreaktor Anaerobik Sarah, Maya; Misran, Erni; Maulina, Seri; Pertiwi, Ika; Ritman, Nahlionny; Hasibuan, Isti Madinah; Parulian, Ihut
Jurnal Teknik Kimia USU Vol. 10 No. 2 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The world's energy supply is very dependent on non-renewable energy in the form of fossil fuels. This causes fossil fuels depletion and the need for alternative energy sources such as biogas. Biogas is produced from the fermentation process of organic matter with the help of anaerobic bacteria in free oxygen absence. This study aims to produce biogas from cabbage and tomato waste separately. Biogas production was carried out by varying feed concentrations of 100 g/L, 200 g/L, and 300 g/L for cabbage waste and 81.6 g/L; 215 g/L; and 237 g/L for tomato waste. This study consisted of 10 days seeding and acclimatization process, followed by a start-up stage using insulated anaerobic bioreactors. The largest methane from cabbage and tomato waste was 60% at a feed concentration of 200 g/L and 50% at a feed concentration of 237 g/L, respectively. The maximum growth rates (Âµm) for biogas from cabbage and tomato waste were 0.122 day-1 and 0.121 day-1, respectively.

Preparation and Identification of Local Microorganisms (LMOs) using Lake Toba Water and Their Utilization for Plastic Biodegradation Lumbantoruan, Chintya Sinar; Misran, Erni; Masyithah, Zuhrina
Reaktor Volume 24 No.2 August 2024
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.24.2.41-51

Local microorganisms (LMOs) are solutions made from anaerobic fermentation of sugar and complex carbohydrate sources using a local microorganism source medium. Generally, LMO solution possesses the potential to perform plastic biodegradation. This research aims to analyse the variation of the volume of Lake Toba water as a source of microorganisms in the preparation of LMO and to identify plastic degrading local microorganisms. The research steps consisted of making standard curves and growth curves, LMO preparation, testing the biodegradation of low-density polyethylene (LDPE) plastic, isolating microorganisms, performing biochemical test, testing the clear zone for plastic degrading microorganisms, and identifying microorganisms. LMO was made by mixing raw materials according to the ratio of Lake Toba water volume to substrate, namely 20:80 (% v/v); 30:70 (% v/v); and 40:60 (% v/v) which were fermented for 99 hours at 37 °C. The results showed that LMO pH before and after fermentation changed from 4.75; 4.9; and 4.94. to 3.46; 3.45; and 3.48. The decrease in pH was likely due to the activity of microorganisms that produce organic acids. The LDPE plastic degradation percentage of the resulting LMOs were 2.353% w/w; 3.012% w/w; and 4.023% w/w, respectively. For that reason, five microbe isolates obtained from fermentation of Lake Toba water volume to substrate ratio of 40:60 (% v/v) were further screened to validate their potential in degrading LDPE, which 2 isolates produced clear zones and identified as Staphylococcus aureus and Streptococcus sp.

Empowerment of Housewives Through Shibori Weaving Skills and Upgrading Knowledge Related to Dyes and Their Wastes Misran, Erni; Sarah, Maya; Maulina, Seri
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 1 (2023): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v8i1.9291

LKP Girly Mode is one of the non-formal educational institutions in the field of sewing skills. This LKP personnel has skills in making shibori tie dye weaving, but still has limitations in coloring and advanced techniques. Shibori is one of dyeing textile techniques that produce fabrics with various colors and patterns. On the other hand, there are many housewives who depend their family income only on their husbands and need skills that are useful to improve family welfare. The community service team of USU has provided 1 unit of obras machine and 2 additional units of sewing machine to LKP Girly Mode. The team has also carried out a workshop to improve the skills of 12 housewives around the LKP. They were trained to make patterned fabrics using the shibori tie dye technique which were then sewn to produce pillowcase products. The sewing machines that have been handed over, directly used at the workshop and useful to support the operational activities of partners. The results of the training are expected to improve skills that support the empowerment of housewives. In the workshop, the Team also introduce about dyes and simple handling of its waste. The team then treated the remaining fabric dye solution so that a clear solution was obtained that was safely discharged into the water without polluting the environment.

Pemanfaatan Karbon Aktif dari Ampas Teh sebagai Adsorben pada Proses Adsorpsi -Karoten yang Terkandung dalam Minyak Kelapa Sawit Mentah Misran, Erni; Panjaitan, Fery; Yanuar, Fahmi Maulana
Jurnal Rekayasa Kimia & Lingkungan Vol 11, No 2 (2016): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v11i2.5402

Penelitian tentang penggunaan karbon aktif dari ampas teh sebagai adsorben telah dilakukan untuk mengadsorpsi -karoten yang terkandung dalam minyak kelapa sawit mentah. Penelitian ini bertujuan untuk mendapatkan model isoterm dan kinetika yang sesuai untuk proses adsorpsi -karoten di dalam CPO. Kajian isoterm dilakukan pada suhu 60C menggunakan rasio karbon aktif terhadap CPO = 1:3, 1:4, 1:5, dan 1:6. Kajian kinetika dilakukan pada suhu 60C, rasio karbon aktif terhadap CPO = 1:3 dimana sampel diambil dengan interval waktu pengambilan 2 menit hingga 120 menit. Hasil penelitian menunjukkan bahwa kemampuan karbon aktif dari ampas teh dalam menyerap -karoten dari CPO ini sangat memuaskan yakni lebih besar dari 99%. Persentase adsorpsi -karoten terbaik diperoleh pada rasio karbon aktif terhadap CPO = 1:3, yakni sebesar 99,61%. Model isoterm yang sesuai dengan data penelitian ini adalah model isoterm Freundlich. Sedangkan model kinetika yang sesuai adalah orde dua semu dengan nilai koefisien korelasi (R2) sebesar 0,996. Berdasarkan model kinetika tersebut diketahui bahwa laju penyerapan pada kesetimbangan adalah sebesar 3,5087 mg/g dan konstanta laju adsorpsi sebesar 0,0578 (L/menit).

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