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All Journal Jurnal Teknik Kimia USU

Irvan

Departemen Teknik Kimia, Fakultas Teknik, Universitas Sumatera Utara

Author-ID : 4065306

Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PEMBUATAN BIOETANOL DARI TEPUNG AMPAS TEBU MELALUI PROSES HIDROLISIS TERMAL DAN FERMENTASI: PENGARUH PH, JENIS RAGI, DAN WAKTU FERMENTASI Irvan; Popphy Prawati; Bambang Trisakti
Jurnal Teknik Kimia USU Vol. 4 No. 2 (2015): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Bioethanol is ethanol, which made from starch, glucose, or cellulose of plants. In this research, it has been made from cellulose of sugarcane baggase. This research was conducted to study about the effect of pH, yeast type and the duration of fermentation to yield’s ethanol. The main processes in this research were thermal hydrolysis by liquid hot water (LHW) method, fermentation by using Saccharomyces cerevisiae and purification by vacuum distillation. The variables in this research were pH 4; 4,5; and 5; baker’s yeast and fermented glutinous cassava; and the duration of fermentation were 2, 4, 6, 8 and 10 days. Based on the analysis of the yield, the volume of bioethanol is 23 mL with 0,95 g/ml density and 161,59 kkal/kg heat value as the best yield, under the condition of pH 5 and 4 days of the duration of fermentation using baker’s yeast.

PENGARUH PERBANDINGAN MASSA ECENG GONDOK DAN TEMPURUNG KELAPA SERTA KADAR PEREKAT TAPIOKA TERHADAP KARAKTERISTIK BRIKET Iriany; Meliza; Firman Abednego S. Sibarani; Irvan
Jurnal Teknik Kimia USU Vol. 5 No. 1 (2016): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The purpose of this research is to know the characteristics of briquettes including ash content, moisture content, volatile matter content, heating value, density, burning rate, tensile strength and to know the proper ratio of water hyacinth and coconut shell mixture under tapioca gluten variation. The ratios of water hyacinth and coconut shell in this research were 1:1, 1:2, 1:3, 1:4 with variation of tapioca gluten 5%, 10%, and 15% of the raw materials. From this research, the ideal composition of briquette is obtain in a mixture of water hyacinth and coconut shell at a ratio of 1:4 with tapioca gluten 10%, ash content 9.718%, moisture content 1.374%, volatile matter content 14.814%, heating value 6,879.596 cal/g, density 0.983 g/cm3, burning rate 3.021 × 10-3 g/second and tensile strength 18.400 g/cm2.

ADSORPSI β-KAROTEN YANG TERKANDUNG DALAM MINYAK KELAPA SAWIT (CRUDE PALM OIL) MENGGUNAKAN KARBON AKTIF Irvan; Olyvia Putri Wardhani; Nurul Aini; Iriany
Jurnal Teknik Kimia USU Vol. 5 No. 1 (2016): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Crude palm oil (CPO) is the richest natural source of carotenoids which gives the reddish-orange color in crude palm oil. The reddish color in unprocessed palm oil is disliked by consumer. This research is aimed to adsorb the β–carotene from the CPO using activated carbon, then the kinetics, isotherm models and thermodynamics data of the adsorption process were obtained. The main materials used in this research were CPO and activated carbon. The observed parameters were final concentration and the amounts of adsorbed β–carotene in activated carbon. The adsorption process was conducted by mixing the adsorbent with CPO with the variation of adsorbent: CPO (w/w) ratio = 1 : 3; 1 : 4; 1 : 5 and 1 : 6 with mixing speed 120 rpm and the temperature of 40, 50 and 60 oC. The sample of CPO and activated carbon was analyzed at every 2 minutes until the equilibrium was achieved. The final concentration of the unadsorbed β–carotene was analyzed using UV-Vis spectrophotometer. The results showed that the more CPO used in the process, the lower the adsorption percentage. The higher the adsorption temperature, the higher adsorption percentage. Moreover, the maximum adsorption percentage was 95.108% obtained at ratio 1 : 3 and T = 60 oC. The adsorption isotherm model which fit with the β–carotene adsorption at T = 60 oC was Langmuir model with the correlation coefficient of 0.959. The adsorption kinetics model which fit with the β–carotene adsorption was the second order kinetics model with the correlation coefficient of 0.998. The value of free energy Gibbs (ΔG) = -24,482.484 ; -24,708.059 and -24,933.634 J/mol for each temperature respectively, value of entropy changes (ΔS) = 22.557 J/mol K, and value of enthalpy changes (ΔH) = -17,421.987 J/mol.

PENGARUH KONSENTRASI RAGI DAN WAKTU FERMENTASI PADA PEMBUATAN BIOETANOL DARI BIJI CEMPEDAK (Artocarpus champeden spreng) Irvan; Ayu Wandira Putri; Sri Ulina Surbakti; Bambang Trisakti
Jurnal Teknik Kimia USU Vol. 5 No. 2 (2016): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Needs fuel as a source of energy every day is increasing, while the energy reserves of petroleum (fossil) dwindling, therefore, to meet the needs of the fuel it is necessary to develop alternative fuels that are renewable and home environment (renewable ). Etonal Bioethanol is made from plants containing starch, sugar and other plant cellulose. Where in this study using jackfruit seeds that contain high enough carbohydrates as raw materials. This research aims to make bioethanol from cempedak seeds with various concentrations of yeast and fermentation time. The main process is hydrolysis; fermentation using yeast Saccharomyces Cereviciae; and purification by distillation and condensation. Variables used are changes in the concentration of yeast 3%, 6%, 9% and 2 days, 3 days, 4 days fermentation period. From the analysis of the research results obtained bioethanol yield per amount of raw materials is the best starting 12,5 ml/kg with a density of 0.962 g/ml and the calorific value sebasar 181.925 kcal/kg, which is the variation of the concentration of 9% and 3 days of fermentation period.

PENGARUH RASIO RECYCLE TERHADAP PRODUKSI BIOGAS MENGGUNAKAN REAKTOR TANGKI BERPENGADUK BERBANTUKAN MEMBRAN ULTRAFILTRASI PADA KONDISI TRANSISI (45 oC) Bambang Trisakti; Irvan; M.Taufan Anantama; Arbie Saldi Zusri; Alfian Haikel Lubis; Sri Eka Cahyani
Jurnal Teknik Kimia USU Vol. 8 No. 1 (2019): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Anaerobic digestion is one of solution to environmental problems and energy sources for current energy needs. In anaerobic digestion, organic material is degraded by bacteria, which is carried out without oxygen, and converts it to a mixture of methane and carbon dioxide. POME can be degraded anaerobically in anaerobic digester to produce biogas. This study aims to increase the conversion of biogas produced using a 2 liter Continuous Stirred Tank Reactor (CSTR) type digester in the methanogenesis process by recycling the effluent produced through the ultrafiltration membrane in a transition condition (45oC). The process is carried out by varying the recycle ratio, which is 0%, 15% and 25% on HRT 6 days with a condition of pH 7 ± 0.2. The highest average biogas production was achieved at the 25% recycle ratio of 33.15 x 10-5 L / mg VS. day, with the composition of methane, carbon dioxide and hydrogen sulfide each of 79%; 19%; and 0.006%, with degradation of VS and COD of 39.58% and 66.33% respectively. For the composition of the highest CH4 content obtained at a variation of the 15% recycle ratio which is equal to 85% while for the composition of carbon dioxide, and hydrogen sulfide each is 14%; and 0.0076%.

Co-Authors Alfian Haikel Lubis Arbie Saldi Zusri Ayu Wandira Putri Bambang Trisakti Firman Abednego S. Sibarani Iriany M.Taufan Anantama Meliza Nurul Aini Olyvia Putri Wardhani Popphy Prawati Sri Eka Cahyani Sri Ulina Surbakti

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