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All Journal Reaktor Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) Jurnal Bahan Alam Terbarukan CHEMICA Jurnal Teknik Kimia Jurnal Riset Kimia Prosiding Semnastek JURNAL KONVERSI Jurnal Pemberdayaan: Publikasi Hasil Pengabdian Kepada Masyarakat Buletin Ilmiah Sarjana Teknik Elektro Mobile and Forensics ASEAN Journal of Chemical Engineering Indonesia Berdaya Yumary: Jurnal Pengabdian kepada Masyarakat Journal of Agri-Food Science and Technology (JAFoST) Jurnal Kimia dan Rekayasa Indonesian Journal of Chemical Engineering Jurnal Integrasi Proses dan Lingkungan

Agus Aktawan, Agus

Program Studi Teknik Kimia, Fakultas Teknologi Industri, Universitas Ahmad Dahlan, Daerah Istimewa Yogyakarta

Author-ID : 522331

Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Nursing Public Health Social Sciences Veterinary Other

Published : 28 Documents Claim Missing Document

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The Characterization of Synthetic Zeolite for Hydrocracking of Waste Cooking Oil into Fuel Siti Salamah; Agus Aktawan; Ilham Mufandi
Reaktor Volume 20 No.2 June 2020
Publisher : Dept. of Chemical Engineering, Diponegoro University

Zeolite A was used as hydrocracking catalyst to convert cooking oil into potential renewable fuels. The experiment was performed by characterize the diffraction, and pore properties the synthetic zeolite and it was confirmed the synthetic zeolite was zeolite A. The hydrocracking process of waste cooking oil was carried out in semi-fixed batch reactor system at 450° C for 2 hours, under the hydrogen flow of 20 ml/minute. The diffractogram and Si/Al ratio, 1.6, were matched to zeolite A properties, with the surface area, pore diameter, and pore volume were, 1.163 m2/g, 3.93 nm, and 0.001 cc/g, respectively. Liquid product from hydrocracking process of cooking oil consisted of 28.99% alkane and alkene 26.59% that are potential as renewable fuels.Keywords: waste cooking oil; zeolite A; hydrocracking

Desain Sistem Biodiesel Berbasis Plc Berdasarkan Diagram Keadaan Riky Dwi Puriyanto; Son Ali Akbar; Agus Aktawan
Jurnal Ilmiah Teknik Elektro Komputer dan Informatika Vol 4, No 2 (2018)
Publisher : Universitas Ahmad Dahlan

Biodiesel merupakan salah satu jenis dari biomassa yang merupakan salah satu tipe sumber energi terbarukan. Sistem biodiesel merupakan sistem sekuensial (berurutan) yang dapat diatur dengan jenis pengendali programmable logic controller (PLC). Permasalahan sistem sekuensial dapat diselesaikan dengan membuat sebuah diagram keadaan (state diagram) yang merepresentasikan kondisi serta transisi yang ada pada sistem. Sistem biodiesel yang direpresentasikan dalam diagram keadaan kemudian dikonversi menjadi diagram ladder sebagai salah satu bahasa pemrograman sebuah PLC. Metode konversi diagram keadaan menjadi diagram ladder merupakan metode pemrograman terstruktur yang bermanfaat bagi programmer PLC baik level pemula hingga ahli dalam menjalankan PLC. Manfaatnya adalah kesalahan yang terjadi dapat diketahui dengan jelas dan terstruktur. Desain human machine interface (HMI) sistem biodiesel pada penelitian ini dibuat pada perangkat lunak CX One (CXP dan CXD) dengan menggunakan PLC tipe CP1E. Hasilnya adalah perancangan diagram keadaan sistem biodiesel dan konversi diagram keadaan menjadi diagram ladder telah berhasil dilakukan dengan baik. Pada desain ini memori yang diperlukan sebesar 6,5% dari total memori yang dimiliki PLC CP1E.

Gasifikasi Biomassa Serbuk Gergaji Kayu Mahoni (Swietenia Mahagoni) untuk Menghasilkan Bahan Bakar Gas sebagai Sumber Energi Terbarukan Astri Nurwidayati; Putri Ayu Sulastri; Destya Ardiyati; Agus Aktawan
CHEMICA: Jurnal Teknik Kimia Vol 5, No 2 (2018): Desember 2018
Publisher : Universitas Ahmad Dahlan

Energy cannot be separated from human life. Increased energy needs for human life that are contradictory to existing fossil fuel sources can cause an energy crisis. Biomass is an alternative energy source that is environmentally friendly, economical and renewable. Biomass energy is derived from plants such as wood, rice hulls, corn head, etc. The process of converting biomass into energy can be done in several ways. They are combustion, pyrolysis, and gasification. Gasification is a technology for converting solid materials into syngas (CO, H2, and CH4) which can be used as a fuel. One of the gasifiers that have been developed is a downdraft system. The solid material we use in this study is a mahogany wood powder which has a cellulose content of up to 46.8%. Through this research, we can find out the effect of the variable of raw materials weight towards the time of flame, the quality of the fire, and the amount of gas produced. The gas produced was tested visually by lighting the fire and instrumentally tested using a tool called Chromatography Gas to determine the composition of the gas. The biggest yield syngas is 70,71% with the 18,000 seconds gas release time on the variable of mahogany wood powder weight of 3500 grams. The highest CH4 and CO Gas concentrations were 1,868% and 15.902% on the variable of 3,500 gram mahogany powder weight. While the highest concentration of H2 gas is 20.965% produced with the variable of 2,500 gram mahogany powder weight. The results of this study indicate that the more feed in the gasifier, the greater the number and composition of syngas and the longer the gas release time.

Proses Gasifikasi berbagai Jenis Biomassa pada Gasifier Downdraft Agus Aktawan
CHEMICA: Jurnal Teknik Kimia Vol 2, No 2 (2015): Desember 2015
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v2i2.4564

Biomass gasification is an endothermic reaction process for converting biomass into syngas. Gasification occurs at high temperatures with limited oxygen. Knowing the temperature profile of biomass gasification wood charcoal, coconut shell charcoal and coconut shell, rice husk and woodchip and seek optimal results from gasification of biomass are the purpose of the research. Research start by ignite the biomass in the gasifier, the air flows by blower and the syngas came out after the filter. Research variabel are variation of biomass types mentioned above. Observations were made up until the biomass in the gasifier did not produce syngas, characterized by gas results could not burn. The results of the temperature profile from gasification of various biomass shows that the syngas appeared in the early minutes (2 minutes until the 5th) on the gasification, such as gasification coconut shell, woodchip and rice husk. Syngas of coconut shell charcoal is 2,825% w/w of biomass and can burn for 19 minutes and resulted in 1,92% ash and 29,57% charcoal.

Pemisahan Hasil Cair Pirolisis Sampah Plastik Pembungkus dengan Distilasi Batch Siti Salamah; Agus Aktawan
CHEMICA: Jurnal Teknik Kimia Vol 3, No 1 (2016): Juni 2016
Publisher : Universitas Ahmad Dahlan

Plastics waste has become a major issue for environment. Since it invented in 1907 plastic has become most used component on our daily lives. Plastic has many adavantages compared to other materials. In general plastic has a low density, light, varying strength and low manufacturing cost. However, plastic cannot degraded naturally and when not used anymore it will pollute the enviroment. One of method to degrade plastic is pyrolysis. In this method plastic will degrade to hydrocarbon which can used as liquid fuel. Pyrolysis of plastic occurs at high temperature of about 400 oC under free oxygen environment and produces small moleculer weight molecules. This research was conducted to determine the composition products of pyrolysis selective plastic at 450 oC in previous research. The method which used to separate products of pyrolysis is distillation with temperature between 50 oC to 240 oC to obtain liquid fuel as products of pyrolysis plastic. The results of this research were the distillate at 170 oC, 190 oC, 200 oC, 210 oC, 220 oC and 240 oC with volume 2 mL, 4,7 mL, 2,3 mL, 2,5 mL, 5,0 mL and 4,9 mL. And the most products component of pyrolysis plastic in previous research was obtain at 190 oC, 220 oC and 240 oC.

GASIFIKASI SERBUK GERGAJI BATANG KELAPA UNTUK MENGHASILKAN BAHAN BAKAR GAS Agus Aktawan; Maryudi Maryudi; Muhammad Hakiim Marzun; Achmad Saidi Noor
JURNAL KONVERSI Vol 9, No 1 (2020)
Publisher : Universitas Muhammadiyah Jakarta

Indonesia merupakan negara penghasil kelapa dengan hasil yang melimpah. Batang kelapa dimanfaatkan sebagai bahan baku furniture dimana hasil sampingnya berupa serbuk gergaji. Serbuk gergaji kayu kelapa merupakan salah satu biomassa yang dapat dimanfaatkan sebagai bahan bakar gas atau syngas dengan metode gasifikasi. Gasifikasi dilakukan dengan perbedaan variabel berat umpan dan sistem operasi updraft dan sistem operasi downdraft. Penelitian ini menggunakan variabel bebas berupa serbuk gergaji kayu kelapa. Sedangkan variabel terikat yang akan didapatkan yaitu berupa output syngas, suhu gasifikasi, dan waktu yang dibutuhkan untuk menghasilkan syngas. Hasil penelitian menunjukkan bahwa semakin banyak umpan serbuk gergaji kayu kelapa, maka semakin banyak syngas yang dihasilkan dan semakin lama waktu produksi syngas. Berdasarkan analisis syngas, didapatkan hasil pada gasifikasi updraft sebesar 15,8670% CO; 6,4133% CH4; 20,3237% H2 dan gasifikasi downdraft sebesar 13,7617% CO; 0,5693% CH4; 6,1820% H2. Sistem operasi downdraft lebih optimal jika dibandingkan dengan sistem operasi updraft berdasarkan nilai efektifitas yang ditinjau dari konsentrasi CO senilai 53,5529 : 46,4471; konsentrasi CH4 senilai 91,8465 : 8,1535; konsentrasi H2 senilai 76,6767 : 4,9204. Dapat disimpulkan bahwa gasifikasi downdraft lebih efektif dalam mengkonversi serbuk gergaji kayu kelapa menjadi bahan bakar gas.

The Effects of Particle Mesh and Temperature on Pyrolysis Spirulina platensis Residue (SPR): Pyrolysis Yield and Bio-Oil Properties Siti Jamilatun; Arief Budiman; Ilham Mufandi; Agus Aktawan; Nabila Fauzi; Defiani Putri Denanti
ASEAN Journal of Chemical Engineering Vol 22, No 1 (2022)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.69439

Microalgae is the third generation of biomass as renewable energy, a future energy source for making bio-oil. The purpose of this research is to examine the biomass from microalgae Spirulina platensis residue (SPR) using the pyrolysis process, to investigate the effect of particle mesh and temperature on the pyrolysis process, to determine the bio-oil properties, including density, pH, color, flame power, and conversion. Fixed bed reactor used for SPR pyrolysis with dimensions of 4.4 cm outside diameter, 4.0 cm inside diameter, and 60.0 cm reactor height. The temperature controls have been fitted from 300-600 °C combined with a 14-16 °C/minute heating rate. Spirulina platensis residue of 50 grams with various particle mesh (80 and 140 mesh) was fed to the reactor. From the experiment results, the particle mesh and temperature process are influenced by bio-oil yield, water phase, gas yield, biochar yield, conversion, and bio-oil properties, including density, pH, flame power, and color. One hundred forty mesh particles at a temperature of 500 °C showed the highest bio-oil yield with a yield of 22.92%, then the water, charcoal, and gas phases were 27.98, 18.84, and 30.26%, with a conversion of 81.16%. At the same time, 80 mesh particles at 500 °C yielded bio-oil, water, charcoal, and gas phases of 19.66, respectively; 23.10, 27.90, and 29.34%, with a conversion of 72.10%. In addition, density, pH, color, and flame power are described in this study.

Tempeh Manufacturing Liquid Waste Treatment Using Alum Coagulant With Variation of Coagulant Weight Winda Rohmah Shoffianti; Dila Argatiningtyas; Agus Aktawan; Imam Santosa; Mar’atul Husna
CHEMICA: Jurnal Teknik Kimia Vol 10, No 1 (2023): April 2023
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v10i1.25270

So far, liquid waste from the tempe industry has yet to be utilized and is only disposed of in sewers to the environment. The liquid waste from tempe consists of soluble proteins from soybeans, which can give rise to a sour smell, and there are tiny particles that settle, so it is necessary to treat the waste before it is discharged into the environment. Alum is one of the coagulants that can be used to treat liquid waste. This research contributes to determining the effect of alum as a coagulant in tempe industrial wastewater to obtain optimal results. The optimum results in question are an increase in DO levels and a decrease in COD and TSS levels in the tempe industrial wastewater so that the resulting conditions are not dangerous if the waste is disposed of into the environment. The variables observed in this study were pH, DO, COD, and TSS comparing each variable. The variable used in this study was the weight of the alum coagulant with a stirring speed of 300 rpm for 90 minutes and standing for 24 hours. In this study, there is a correlation of variations in coagulant weight. The optimum results obtained were from 100 ml of waste. The optimum DO value produced was 8.4 mg/L at an interpretation of 10 grams of coagulant weight. The optimum COD concentration obtained was 18612.5 mg/L at a variation of 20 grams of coagulant weight. The optimum TSS concentration obtained was 102 mg/L with 25 grams of coagulant weight variation.

Adsorption of Cu and Cd Metals in Batik Liquid Waste Using Adsorbents from Chicken Bone Waste: Penjerapan Logam Cu dan Cd pada Limbah Cair Batik Menggunakan Adsorben dari Limbah Tulang Ayam Elisa Puspita Anggraeni; Fithnatia Khoirunnisa; Agus Aktawan
Jurnal Kimia dan Rekayasa Vol. 4 No. 1 (2023): Jurnal Kimia dan Rekayasa Edisi Juli 2023
Publisher : Program Studi S1 Teknik Kimia, Fakultas Teknik, Universitas Setia Budi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31001/jkireka.v4i1.60

From the beginning to the refinement process, the batik production process is indicated using chemicals that contain heavy metal elements so that the waste also still contains these heavy metal elements. If the waste material is not treated correctly, then the waste material can pollute the environment. Batik waste has carcinogenic properties because synthetic dyes still contain many heavy metals. Heavy metal pollution causes environmental damage and is dangerous to health. Chicken bones can be used as heavy metal adsorbents because, chemically, the main composition contains about 85% of minerals: calcium phosphate, 14% calcium carbonate, and 1% magnesium. The results showed that the chicken bone charcoal could adsorb the color from deep blue to clear yellow, a decrease in pH from 12 to pH 7, and a decrease in Cu metal content decrease by 50.19% and 19.36% for Cd metal. The metal content of the adsorption results has met the waste requirements with SNI 6889.67-2009 for Cu metal <0.003 mg/l and SNI 6989.16:2009 for Cd metal <0.01 mg/l. AbstrakProses produksi batik dari awal hingga proses penyempurnaan diindikasikan menggunakan bahan kimia yang mengandung unsur logam berat, sehingga limbahnya juga masih mengandung unsur logam berat tersebut. Limbah cair dari produksi batik perlu diolah dengan baik, agar limbah cair tersebut tidak memberikan dampak buruk atau mencemari lingkungan. Limbah batik memiliki sifat karsinogenik karena pewarna sintetis yang digunakan masih banyak mengandung logam berat. Pencemaran logam berat menyebabkan kerusakan lingkungan dan berbahaya bagi kesehatan. Tulang ayam dapat digunakan sebagai adsorben logam berat karena secara kimia komposisi utama mengandung sekitar 85% mineral yaitu kalsium karbonat, kalsium fosfat, dan magnesium. Hasil penelitian menunjukkan bahwa arang tulang ayam mampu menyerap warna dari biru tua menjadi kuning jernih, penurunan pH dari 12 menjadi pH 7 dan penurunan kandungan logam Cu sebesar 50,19% dan logam Cd sebesar 19,36%. Kandungan logam hasil adsorpsi telah memenuhi persyaratan limbah dengan SNI 6889.67-2009 untuk logam Cu <0,003 mg/l dan SNI 6989.16:2009 untuk logam Cd <0,01 mg/l.

The Characteristics of Flour from Mango Seeds Anggraini, Anggraini; Aprillia, Selfi; Aktawan, Agus
Journal of Agri-Food Science and Technology Vol. 4 No. 2 (2023): November
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/jafost.v4i2.6948

Indonesia produces 3,308,895 tons of mangoes in 2022. One type of mango in Indonesia is mango golek. Golek mango seeds can be processed into flour as a source of carbohydrates. The research contribution is the feasibility of golek mango seed flour based on SNI 3751:2009. Proximate analysis was used to determine the nutritional content of the golek mango seed flour. Flour is produced within 2 hours 30 minutes where the temperature variations are 80, 85, 90, 95, and 100 ℃. The proximate analysis consisted of the analysis of carbohydrate content, protein content, fat content, moisture content, ash content, and organoleptic tests. This study obtained an average carbohydrate content of 13.39%, an average protein content of 5.32%, an average water content of 0.80%, an average fat content of 0.33%, and a moderate ash content. 0.97%. The lower the yield of protein, water, fat, and ash, the lower the carbohydrate content, and vice versa. The results of the organoleptic test showed that the higher the temperature used during the oven, the darker the colour, the sharper the aroma, and the smoother the texture of the golek mango seed flour.

Co-Authors Achmad Saidi Noor Ahmad Azhari Alfian Ma’arif Amelia, Shinta Anggraini Anggraini Aprillia, Selfi Ardistya, Fibrianzia Bety Areeprasert, Chinnathan Arief Budiman Astri Nurwidayati Chusna, Firda Mahira Alfiata Defiani Putri Denanti Destya Ardiyati Dhias Cahya Hakika Dila Argatiningtyas Elisa Puspita Anggraeni Endah Sulistiawati Fithnatia Khoirunnisa Huda, Muhammad Farkhan Fikri Ilham Mufandi Imam Santosa Imam Santosa Juwitaningtyas, Titisari Kamelia Samang, Tirsyah Kusmayanti, Eva Kusuma, Isnainul Manuseng, Aprilla Samsiar Maryudi Maryudi Mar’atul Husna Mufandi, Ilham Muhammad Hakiim Marzun Muhammad Kunta Biddinika Mustopa Nabila Fauzi Olunusi, Samuel Olugbenga Pangistu, Lalu Arfi Maulana Puriyanto, Riky Dwi Putri Ayu Sulastri Rahayu, Aster Rahmadhia, Safinta Nurinda Ramli, Nor Hanuni Shinta Amelia Sintia, Dhea Wahyu Siti Jamilatun Siti Salamah Soedjatmiko Son Ali Akbar Widiawati, Selvi Winda Rohmah Shoffianti Zahrul Mufrodi, Zahrul Zalfa, Sarah Haura

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