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All Journal Jurnal Serambi Engineering Jurnal Teknik Kimia USU

Fatimah Fatimah

Departemen Teknik Kimia, Fakultas Teknik Universitas Sumatera Utara

Author-ID : 3857545

Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Pengelolaan Air Asam Tambang dari Batuan Sisa di Pit Barani dan Ramba Joring serta Aplikasi Model Enkapsulasi pada Bendungan Tailing di Tambang Emas Martabe Latipa Henim Siregar; Zulkifli Nasution; Fatimah Fatimah
Jurnal Serambi Engineering Vol 6, No 3 (2021): Juli 2021
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v6i3.3041

Acid mine drainage is one of the significant negative impacts of mining activities that can result in environmental degradation. Waste rock is mine waste that is found in large quantities and can produce acid mine drainage (AMD). This study aims to identify waste rock which has the potential to generate acidity (PAF) and do not generate acidity (NAF) in the Barani and Ramba Joring pits and the application of the encapsulation model in tailings dams. The research method with the encapsulation model is a simple method designed in tailings dams to encapsulate the PAF with the NAF. Rock characterization and geochemical analysis will result in the rock being classified as PAF and NAF in both wells . The data used for this study are drilling data (cutting) data that include rock lithology and chemical quality (NAPP and NAG) data. The results identified that the PAF was dominant relative to the NAF both wells and the waste rock in the Barani pit was at a higher risk of producing acidity than the Ramba Joring pit. Measurements of oxygen diffusion and surface water quality indicated that encapsulation of waste rock in the tailings dam may prevent the formation of acidic mine drainage

KINETIKA REAKSI FERMENTASI ALKOHOL DARI BUAH SALAK Fatimah; Febrina Lia G; Lina Rahmasari G
Jurnal Teknik Kimia USU Vol. 2 No. 2 (2013): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Research about bioethanol production from salak that are not marketable has been done. Salak containing 16.07% starch and 32.96% glucose, so that salak is potential to be converted into bioethanol by fermentation. This research aimed to study reaction kinetic of alcoholic fermentation that are the reaction kinetic of the hydrolysis of starch to glucose and fermentation of glucose to alcohol from salak by using Saccharomyces cereviseae. Hydrolysis of starch reaction containing two reaction rate controls that are chemical reaction and film diffusion. The results obtained for the hydrolysis reaction that the reacion rate constant is 1,41 x 10-11 and the film diffusion coefficient constant is 0,47 x 10-11 so the rate of the hydrolysis reaction is controlled by the film diffusion. Reaction rate constant for fermentation is 169,88. During the process of fermentation, the concentration of starch and glucose tended to decreased by time of fermentation and bioethanol concentration tended to increase by time of fermentation.

PENGARUH TEMPERATUR DALAM PEMBUATAN KARBON AKTIF DARI KULIT SALAK (SALACCA SUMATRANA) DENGAN AKTIFATOR SENG KLORIDA (ZnCl2) Muhammad Turmuzi; Ardiano Oktavianus Sahat Tua; Fatimah
Jurnal Teknik Kimia USU Vol. 4 No. 2 (2015): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Activated carbon can be made of organic or anorganic materials. Salak peel is a potential organic material as activated carbon. This research aimed to understand the effect of temperature in activated carbon with chemical activation ZnCl2 production from salak peel. The method included preparation of raw material, chemical activation, pyrolysis and iodine value test. The ratio of ZnCl2 is1:1 g/g, the activation time is 2 hours and the acivation temperature variation is 400, 450, 500, 550 and 600 oC. Results showed that the iodine value increased and yield decreased as the increasing of activation temperature. The highest iodine value and yield were achieved at 600°C and 400°C, the values were 694 mg/g and 30,93%.

PENGARUH PENAMBAHAN TRACE METAL FE TERHADAP PENYISIHAN KANDUNGAN PADATAN LIMBAH CAIR KELAPA SAWIT MENGGUNAKAN REAKTOR HYBRID UPFLOW ANAEROBIC SLUDGE BLANKET Julika Sitinjak; Janwarisman Purba; Fatimah
Jurnal Teknik Kimia USU Vol. 3 No. 1 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Research about influence the addition of trace metal Fe against allowance for the solid content of palm oil mill effluent using Hybrid Upflow Anaerobic Sludge Blanket Reactor aim to know the additionof trace metal Fe against allowance for the solid content of palm oil mill effluent using HUASB reactor based on removal of Chemical Oxygen Demand (COD), Total Suspended Solid (TSS) dan Volatile Suspended Solid (VSS). The reactor isa reactor with a combination of suspended growth reactor in the bottom and attached growth reactor at the top. The material used is palm oil mill effluent and inoculum derived from PKS Pagar Merbau. Test parameters to observed are COD, TSS and VSS. The optimum conditions obtained on the organic load is 17024 mg/l with the addition of Fe is 0.5 mg/l so that obtained COD reduction is 85.891%, TSS reduction is 86.047% and VSS reduction is 36.566%.

KINERJA MIKROBA Zymomonas mobilis DAN Saccharomyces cerevisiae UNTUK MENGURAIKAN HIDROLISAT TONGKOL JAGUNG MENJADI BIOETANOL DENGAN PENGARUH WAKTU FERMENTASI DAN RASIO PENAMBAHAN MIKROBA Fatimah; Deralisa Ginting; Veronica Sirait
Jurnal Teknik Kimia USU Vol. 6 No. 2 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Bioethanol from biomass is one of energy which has a potential as alternative fuel. Bioethanol can be produced by using fungi or bacteria. The research was about the performance of Zymomonas mobilis and Saccharomyces cerevisiae to change corn cobs hydrolyzate into bioethanol by adding microbes to the influence of time and ratio of fermentation had been done. The hydrolyzate were decomposition of corn cobs using Trichoderma reesei and Aspergillus niger. The purpose of this study was to know the conversion of hydrolysis of corn cobs into bioethanol with variation time of fermentation (1 day, 3 days, 5 days, and 7 days) and rate of adding microbes (Zymomonas mobilis : Saccharomyces cerevisiae = 1:1; 1:2 and 2:1) (v/v). The glucose from corn cobs hydrolyzate was 5,869 g/ml. Fermentation wass carried out at 25 0C. Bioethanol which obtained from this study was investigated using gas chromatography. The optimum bioethanol yield was equal to 6,31% by using Zymomonas mobilis : Saccharomyces cerevisiae (2:1) and at the 3 days fermentation time.

PENGARUH PENAMBAHAN TRACE METAL (MOLYBDENUM & SELENIUM) TERHADAP PEMBUATAN BIOGAS DARI SAMPAH ORGANIK DAN KOTORAN SAPI Fatimah; Grace Angelin
Jurnal Teknik Kimia USU Vol. 6 No. 4 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Trace metal are essential for the enzyme cofactors in methane formation, but its availability of natural is not enough so that the necessary additional trace metal. The purpose of this study is to determine the effect of addition Molybdenum (Mo) and Selenium (Se) as trace metal on the quality and quantity of biogas in anaerobic digesters. The study was carried out by mixing vegetables wastes, aquadest and cow manure that have been in a blender and then have been fermented for 30 days in variety of addition of trace metal Mo 10 mg/L, Se 10 mg/L and a mixture of Mo + Se 10 mg/L in an reactor batch of 4 L capacity. Operation in digesters, pH was maintained in range (6.5 – 8) and at temperature 25 – 30 oC. This research parameters that observed were volume biogas, pH, temperature, TS and VS. The highest of volume cumulative biogasin this experiment 630 ml are formed Mo + Se, with degradation average TS 26.69 % and VS 17.18 %.

Aktivasi Bottom Ash dari Pembakaran Batubara untuk Menurunkan Kandungan Senyawa Fosfat dalam Air Fatimah; Budi Pratama Tarigan; Alfikri Ramadhan
Jurnal Teknik Kimia USU Vol. 8 No. 2 (2019): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This study aims to look at the effect of bottom ash activation with NaOH on the morphological structure and content of the elements contained in bottom ash and see the effect of activation on the absorption of phosphate compounds in water by bottom ash. Bottom ash from PT SOCIMAS coal combustion has been activated with NaOH and has been used to adsorb phosphate. Phosphate used in the form of KH3PO4. Bottom ash was first characterized by SEM-EDS to see the morphological structure and the element content contained in the bottom ash. Bottom ash mass variations used are (1, 2, and 3 grams), and particle size (50-70 mesh, 70-110 mesh, and 110-140 mesh). The activation process lasts for 5 hours using 3 M NaOH, then washed to pH 7. The bottom ash is activated then characterized again with SEM-EDS to ensure the impurities present in the bottom ash are reduced. Furthermore, bottom ash is used to adsorb phosphate with time variations of 20, 40, and 60 minutes. The most effective adsorption capacity (6.39 mg / g) is at the 20th minute with a particle size of 110-140 mesh and a bottom ash mass of 1 gram. The Freundlich and Langmuir isotherm model is used to describe the phosphate ion adsorption isotherm by the bottom ash. Based on the data obtained, the isotherm model suitable for this research is the Freudlich (R2 = 0.9721) and Langmuir (R2 = 0.9505) isotherm model.

Co-Authors Alfikri Ramadhan Ardiano Oktavianus Sahat Tua Budi Pratama Tarigan Deralisa Ginting Febrina Lia G Grace Angelin Janwarisman Purba Julika Sitinjak Latipa Henim Siregar Lina Rahmasari G Muhammad Turmuzi Veronica Sirait Zulkifli Nasution

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