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All Journal Reaktor METANA Konversi Science and Technology Indonesia Jurnal Teknik Kimia Jurnal ABDINUS : Jurnal Pengabdian Nusantara Kinetika
Asyeni Miftahul Jannah
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Sriwijaya
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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DELIGNIFICATION BY USING ALKALINE-ACID PRETREATMENT ON BIOETHANOL PRODUCTION FROM RICE STRAW Jannah, Asyeni Miftahul
KINETIKA Vol 4, No 2 (2013): KINETIKA 01072013
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13.458 KB)

Abstract

Rice straw as agricultural waste contains cellulose that potentially to produce ethanol. However, it has lignin content that will inhibit the enzyme in converting glucose into ethanol. In this research, pretreatment steps aim to release and breakdown lignin in rice straw. Pretreatment was conducted in two phases, alkaline pretreatment using NaOH (1%,2%,3%,4%,and 5%) and acid pretreatment using 1% H2SO4 with various heating time (30, 60, 90, 120 and 150 minutes) and used for ethanol production by means of Simultaneous Sacchari?cation and Fermentation (SSF) with cellulose enzyme and Saccharomyces Cerevisiae. The results showed that higher NaOH concentration using on alkaline pretreatment and longer heating time on acid pretreatment made morbe degraded lignin content. The highest ethanol content produced was 48.38% from delignification treatment with NaOH concentration of 5% and acid pretreatment time of 150 minutes.
Pengaruh H2SO4 terhadap kadar lignin dan glukosa pada pembuatan bioetanol menggunakan metode simultaneous saccharification fermentation Asyeni Miftahul Jannah; Nuraini D Pratiwi; Titi Lahanda
Jurnal Teknik Kimia Vol 28 No 1 (2022): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v28i1.347

Abstract

Bioetanol dapat dijadikan pengganti bahan bakar bensin dan terbuat dari berbagai jenis tanaman dan limbah yang mengandung selulosa. Salah satu limbah yang masih belum termanfaatkan secara maksimal adalah sabut kelapa. Penelitian ini bertujuan untuk menganalisa pengaruh variasi konsentrasi H2SO4 (5; 7; 10; 13 dan 15%) terhadap kadar lignin yang didegradasi pada proses delignifikasi serta pengaruh variasi enzim (2,5; 5; 7,5 dan 10 mL) yang digunakan terhadap kadar bioetanol yang dihasilkan pada proses Simultanous Saccarification and Fermentation (SSF). Analisa kadar lignin dan selulosa pada proses delignifikasi menggunakan metode Chesson-Datta. Kadar selulosa optimal didapatkan sebesar 54,25% serta kadar lignin sisa sebanyak 18,78% yang dihasilkan oleh sampel dengan melibatkan 13% H2SO4 pada proses delignifikasi. Pada proses SSF melibatkan variasi enzim selulase dan Saccharomyces cerevisiae serta proses fermentasi dilakukan selama 7 hari. Analisa kadar bioetanol hasil dari proses SSF menggunakan metode densitas. Dari hasil penelitian didapatkan kadar bioetanol maksimum yang dihasilkan sebesar 42,63% pada sampel dengan perlakuan 10 mL enzim selulosa.
Pemanfaatan sabut kelapa menjadi bioetanol dengan proses delignifikasi acid-pretreatment Asyeni Miftahul Jannah; Tamzil Aziz
Jurnal Teknik Kimia Vol 23 No 4 (2017): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

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Abstract

Sabut kelapa sebagai limbah pertanian yang mengandung lignoselulosa tinggi belum termanfaatkan secara optimal secara ekonomi. Kandungan selulosa mencapai 44,44% menjadikan sabut kelapa sebagai potensi besar untuk dijadikan sebagai bahan bakar alternative dengan cara mengkonversikannya menjadi bioetanol. Penelitian ini bertujuan untuk mengkonversikan sabut kelapa menjadi bioetanol dengan menggunakan larutan asam (H2SO4 dan CH3COOH) pada proses pretreatment dengan variasi konsentrasisebesar 1, 3 dan 5%. Kemudian dilakukan proses hidrolisa dengan menggunakan KOH 5% dan fermentasi dengan variasi waktu 3, 5, dan 7 hari menggunakan ragi Saccharomyces cerevisiae. Dari hasil penelitian menunjukkan kadar lignin paling banyak berkurang didapat dari sampel dengan pretreatment menggunakan larutan H2SO4 5% yang juga mampu menghasilkan kadar glukosa dan bioetanol terbesar dengan waktu fermentasi optimal selama 5 hari. Kadar bioetanol maksimum yang didapat sebesar 5,7768% v/v.
Karakterisasi edible film kulit durian dengan penambahan antibakteri dari ekstrak bawang putih Yandriani Yandriani; Asyeni Miftahul Jannah
Jurnal Teknik Kimia Vol 28 No 1 (2022): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v28i1.949

Abstract

Edible film antibakteri dari kulit durian merupakan salah satu inovasi terbaru di bidang pengemasan makanan. Untuk menambah nilai dari edible film tersebut, maka dilakukan penelitian dengan penambahan bawang putih sebagai zat antibakteri untuk memperlambat waktu pembusukan. Tujuan dari penelitian ini adalah untuk mengevaluasi pengaruh massa kulit durian dan volume bawang putih yang terbaik berdasarkan karakteristik fisik dari edible film. Perlakuan yang diterapkan meliputi perbandingan massa kulit durian (3, 4 dan 5) g dan perbandingan volume bawang putih (3, 6, dan 9) mL. Kemudian ditambahkan CMC sebanyak 0,5 g, 50 mL akuades, 2 mL gliserol yang diaduk dan dipanaskan pada suhu 70 0C. Hasil penelitian menunjukkan bahwa penambahan kulit durian dan bawang putih yang digunakan berpengaruh terhadap karakteristik edible film antibakteri. Ketebalan film yang dihasilkan pada penelitian ini ialah berkisar antara 0,12 – 0,24 mm. Nilai elongitas yang dihasilkan pada penelitian yaitu antara 11,59%-63,87%. Hal ini menunjukkan bahwa edible film antibakteri yang dihasilkan dapat digunakan sebagai pengemas makanan karena sudah melewati standar plastik kemasan jenis polypropylene yakni sebesar 23%. Penambahan volume bawang putih pada edible film menghasilkan diameter zona hambatan yg terbentuk terhadap bakteri E. Coli yaitu sebesar 26 mm – 28 mm. Uji pelapisan edible film antibakteri dengan buah anggur akan menjaga kualitas buah tersebut lebih tahan lama. Karakteristik fisik edible film antibakteri yang terbaik diperoleh pada massa kulit durian 5 g dan volume bawang putih 3 mL.
Effect of Dilute Acid - Alkaline Pretreatment on Rice Husk Composition and Hydrodynamic Modeling with CFD Novia Novia; Vishnu K Pareek; Hermansyah Hermansyah; Asyeni Miftahul Jannah
Science and Technology Indonesia Vol. 4 No. 1 (2019): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (846.51 KB) | DOI: 10.26554/sti.2019.4.1.18-23

Abstract

The high cellulosic content of rice husk can be utilized as a feedstock for pulp and biofuel. Pretreatment is necessary to break the bonds in the complex lignocellulose matrices addressing the cellulose access. This work aims to utilize the rice husk using dilute acid and alkaline pretreatment experimentally and CFD modeling. The study consists of three series of research. The first stage was the dilute acid pretreatment with sulfuric acid concentration of 1% to 5% (v/v) at 85°C for 60 minutes, and alkaline pretreatment with NaOH concentration of 1% to 5% (w/v) at 85oC for 30 minutes separately. The second stage used the combination of both pretreatment. Moreover the last stage of research was hydrodynamic modeling of pretreatment process by CFD (ANSYS FLUENT 16). The experimental results showed that the lowest lignin content after acid pretreatment was about 10.74%. Alkaline pretreatment produced the lowest lignin content of 4.35%. The highest cellulose content was 66.75 % for acid-alkaline pretreatment. The lowest content of lignin was about 6.09% for acid-alkaline pretreatment. The lowest performance of alkaline pretreatment on HWS (hot water solubility) of about 7.34% can be enhanced to 9.71% by using a combination alkaline-acid. The combined pretreatments result hemicellulose of about 9.59% (alkaline-acid) and 9.27% (acid-alkaline). Modeling results showed that the mixing area had the minimum pressure of about -6250 Pa which is vortex leading minimum efficiency of mixing. The rice husk flowed upward to the upper level and mixed with reagent in the perfect mixing.
The Effect of Flowrate on Dye Removal of Jumputan Wastewater in a Fixed-Bed Column by Using Adsorption Model: Experimental and Breakthrough Curves Analysis Lia Cundari; Bazlina Dawami Afrah; Asyeni Miftahul Jannah; Patrick Rudy Meizakh; Muhammad Alik Aziz; Wulan Ayum Larasati
Reaktor Volume 22 No. 1 April 2022
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.489 KB) | DOI: 10.14710/reaktor.22.1.28-35

Abstract

One of the traditional arts in Indonesia is Jumputan fabric which produced by using tie and dye technic. The Jumputan wastewater contains organic compounds which can decrease the oxygen content in water. An economic and applicable process to handle the Jumputan wastewater is adsorption. The research was conducted to find out the effect of flowrate to the adsorption performance of the dye onto activated carbon in a continuous fixed-bed column based on the breakthrough curve parameter. The activated carbon made from betel nuts (Cyrtostachys lakka) with size particle of 60 mesh. The column dimension was 2 inches of inside diameter and 60 cm of height column. The bed height was 10 cm. The feed pumped from the top of column with variation of flowrate of 10, 20 and 30 ml/min. The absorbance of the dye was analyzed by using UV-Vis spectrophotometer. The adsorption column models were analyzed using Thomas, Yoon-Nelson, and Adam-Bohart. The result of this research was the dye removal efficiency decreased with the increase in flowrate, which was 61.4%; 56.9%; and 47.6% for 10, 20, and 30 ml/min respectively. Feed flowrate showed a negative effect on the saturation time, the higher the flowrate, the faster it reaches the saturation point of the adsorbent. The breakpoints were 180, 260, and 420 minutes at 30, 20, 10 ml/min flowrate. The model data indicated that Thomas and Yoon-Nelson are fitted well with the experimental results. The models show the largest regression and the smallest error with the value of each 0.99 and 0.0035 at flowrate of 10 ml/min.
PROCESSING OF TEMPE LIQUID WASTE IN STAGES USING COMBINATION OF COAGULATION AND ELECTROCOAGULATION METHODS Lia Cundari; Faisal Akbar Adin; Asyeni Miftahul Jannah; Dyos Santoso
Konversi Vol 11, No 2 (2022): OKTOBER 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v11i2.14206

Abstract

The purpose of this study was to determine the effect of slow stirring time of flocculation and stress on the electrocoagulation process on turbidity levels and pH values of tempe liquid waste. The research method used is a combination of coagulation and electrocoagulation processes carried out in batches. Variations carried out were slow stirring time of flocculation (10, 15, 20, 25 and 30 minutes) and variation of voltage (3,6, and 9 volts). The results showed that the stirring time and electrocoagulation voltage affected the turbidity of the tempe liquid waste but did not affect the pH level of the tempe liquid waste. The best slow flocculation time was 20 minutes with a turbidity yield of 31.04 NTU and a percent removal of turbidity of 91.56%. The electrocoagulation voltage of 9 volts resulted in a turbidity of 2.01 NTU and a percent turbidity removal of 93.52%.
Ekstraksi Kulit Jeruk Manis Bahan Pewangi Alami Pada Pembuatan Lilin Aromaterapi Muhammad Yerizam; Asyeni Miftahul Jannah; Nabila Rasya; Adelia Rahmayanti
METANA Vol 18, No 2 (2022): Desember 2022
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v18i2.49707

Abstract

Kulit jeruk manis merupakan limbah yang memiliki nilai jual yang tinggi dan dapat di manfaatkan kembali. kulit  jeruk manis dapat menghasilkan minyak atsiri. Minyak atsiri yang dihasilkan digunakan pada industri kecantikan dan parfum sebagai komponen utama. Komponen – komponen minyak atsiri pada kulit jeruk manis adalah terpen, sesquiterpen, aldehida, ester, dan sterol 3.  Penelitian bertujuan untuk menghasilkan minyak atsiri dari ekstrak kulit jeruk manis agar dapat digunakan sebagai pengganti sintetik pada lilin aromaterapi. Bahan baku yang digunakan dalam penelitian ini berupa bubuk kulit jeruk manis. Proses pengambilan minyak dalam kulit jeruk dilakukan dengan metode ekstraksi sokletasi dimana dilakukan dengan variasi waktu ekstraksi selama 1,2 dan 3 jam menggunakan pelarut n-heksana pada suhu 70℃ dan 75℃  dengan rasio bahan baku terhadap pelarut sebesar 1:10.  Pada proses sokletasi ini menghasilkan yield sebesar 39% dengan kadar limonene sebesar 98,70% yang diuji menggunakan metode Analisa Gas Chromatography-Mass Spectometry (GC-MS). Pada penelitian ini juga dilakukan uji organoleptic berupa uji terhadap bau, warna, bentuk, Uji kesukaan terhadap 25 orang responden serta uji titik leleh terhadap lilin aroma terapi dengan menggunakan metode pipa kapiler. Pada Analisa uji organoleptic menunjukkan dengan penambahan 4% konsentrasi ekstrak minyak kulit jeruk manis pada lilin aromaterapi sudah mampu menghasilkan produk lilin dengan bentuk yang tidak retak, patah maupun cacat dann menghasilkan aroma khas jeruk. Pada uji kesukaan yang dilakukan pada 25 orang responden, didapatkan skala nilai hedonic sebesar 3,88 (cukup tertarik). Dari hasil penelitian didapatkan rendemen minyak terbanyak pada waktu 2 jam dengan suhu 75ºC sebanyak 39,5%.    Sweet orange peel is a waste that has a high selling value and can be reused. sweet orange peel can produce essential oil. The essential oil produced is used in the beauty and perfume industry as the main component. The components of essential oil in sweet orange peel are terpenes, sesquiterpenes, aldehydes, esters, and sterols 3.  The study aimed to produce essential oil from sweet orange peel extract so that it can be used as a synthetic substitute for aromatherapy candles. The raw material used in this study was sweet orange peel powder. The process of extracting the oil in the orange peel was carried out by sokletation extraction method where it was carried out with a variation of extraction time for 1, 2 and 3 hours using n-hexane solvent at 70 ℃ and 75 ℃ with a ratio of raw materials to solvent of 1:10.  This sokletation process produced a yield of 39% with a limonene content of 98.70% which was tested using the Gas Chromatography-Mass Spectometry (GC-MS) analysis method. In this study, organoleptic tests were also carried out in the form of tests on odor, color, shape, preference tests on 25 respondents and melting point tests on aroma therapy candles using the capillary pipe method. The organoleptic test analysis showed that the addition of 4% concentration of sweet orange peel oil extract to aromatherapy candles was able to produce wax products with a shape that was not cracked, broken or deformed and produced a distinctive citrus aroma. In the favorability test conducted on 25 respondents, a hedonic value scale of 3.88 (quite interested) was obtained. From the results of the study, the highest oil yield was obtained at 2 hours with a temperature of 75ºC as much as 39.5%. 
Pemberdayaan Masyarakat dalam Inovasi Bahan Pangan dari Limbah Biji Mangga di SMKN 1 Pemulutan, Sumatera Selatan Enggal Nurisman; Tuty Emilia Agustina; Elda Melwita; Asyeni Miftahul Jannah; Alya Dewi Pritania
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 8 No 1 (2024): Volume 8 Nomor 1 Tahun 2024
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v8i1.19205

Abstract

Mango seeds (Mangifera indica L.) have a fairly high carbohydrate content and can be processed as an alternative food. This community service activity aims to educate the public about the process of processing mango seeds into flour and processed food ingredients. Prior to counseling, the team conducted initial experiments on the products produced using initial treatment in the form of soaking with water, slaked lime and sodium bisulfite. Organoleptic tests on processed food products from mango seeds were carried out by random respondents with assessment indicators in the form of color, texture, aroma and taste. The test results showed that processed cakes from mango seed flour as much as 30% with the initial treatment of sodium bisulfite immersion in the initial process had the best organoleptic value, namely, 3.7 out of 4. This activity was carried out at SMKN 1 Pemulutan and received very good appreciation because it was considered very useful, informative and can be developed continuously.
Co-Authors Adelia Rahmayanti Alya Dewi Pritania B. D. Afrah Cundari, Lia Dyos Santoso Elda Melwita Enggal Nurisman Faisal Akbar Adin Hermansyah Muhammad Alik Aziz Muhammad Yerizam Nabila Rasya Novia Novia Nuraini D Pratiwi Patrick Rudy Meizakh Tamzil Aziz Titi Lahanda Tuty Emilia Agustina Vishnu K Pareek Wulan Ayum Larasati Yandriani Yandriani