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All Journal CHEMICA Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan Proceedings Konferensi Nasional Sistem dan Informatika (KNS&I)
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Jurusan Teknik Kimia, Fakultas Teknologi Industri Universitas Pembangunan Nasional “Veteran” Yogyakarta Jln. SWK 104 Lingkar Utara Condongcatur, Yogyakarta, 5584
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Pirolisis Limbah Pangkal Bambu Betung (Dendrocalamus asper) Tunjung Wahyu Widayati; Danang Jaya; Anantyto Danujatmiko; Bagus Drajat Trimulyo
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020: PROSIDING SNTKK 2020
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Pengaruh Perbandingan Mol Reaktan dan Waktu Reaksi Terhadap Pembuatan Biodiesel dari Minyak Sapi Puji Raharjo; Fahmi Reza Octavianto; Danang Jaya
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2019: PROSIDING SNTKK 2019
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Characterization of Activated Carbon from Pyrolysis Process of Bamboo Base Waste (Dendrocalamus asper) Tunjung Wahyu Widayati; Danang Jaya; Anantyto Danujatmiko
CHEMICA: Jurnal Teknik Kimia Vol 7, No 1 (2020): Juni 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v7i1.15876

Abstract

Bamboo is one type of grass that is part of non-timber forest products. The chemical properties of bamboo contain cellulose, lignin, pentosan, ash, and silica. To make charcoal from bamboo it is necessary to go through a pyrolysis process. Pyrolysis is a process of thermal decomposition carried out in an inert condition. Pyrolysis gradually encourages the formation of secondary reactions, where after a process occurs, recombination occurs which will produce secondary charcoal. Pyrolysis at high temperatures can cause activated charcoal, which is caused by cracking on the surface of the charcoal thereby increasing the surface area of the charcoal. BET analysis is needed to find out the adsorption power of gas molecules on the surface and to the basis for analysis techniques that are important in the measurement of a certain surface area of the material. The ability of activated charcoal to absorb liquid N2 is carried out at 77K with the GSA Quantachrome NovaWin. The largest surface area was obtained in this study at a temperature of 800 °C with pyrolysis time for 3 hours which resulted in a surface area value of 343.9424 m2/g of activated carbon. Based on this research, it can be concluded that higher temperatures and the longer pyrolysis time of pyrolysis, the higher value of the surface area that is produced at a certain temperature and time until the carbon pores are damaged.
Pemanfaatan Serat Pelepah Pisang sebagai Bahan Komposit Danang Jaya; Ragita Putri; Hector Nack
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2019: PROSIDING SNTKK 2019
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Kinetika Pengolahan Limbah Cair Industri Tahu secara Biologi Menggunakan Biofilm dengan Sistem Batch Danang Jaya; Endang Sulistyawati
Eksergi Vol 9, No 1 (2008): Versi Cetak
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v9i1.7543

Abstract

Industri talru menghasilkan limbah cair yang bersifat biodegradable sehingga dapat diurai secara biologi dengan menggunakan mikroorgaínsme. Penelitian ini mempelajari kìnetika pertumbuhan bakteri Bacillus sphaerícvs dalam limbah cair orgonik tahu. Penelítían diløkukan dengan mengembangbiakkan bakteri Bacílllussphaericas dalam larutan 5,5 gram  nuttrìen Agar dan l00mL aquades selama 44jam, dimasukkan kedalam 500 mL limbah cair tahu yang berisi 20 buah batu apung. Setiap selang waktu I atau 2 jam, diømbÍl I buah batu apung dan I0 mL substrat untuk diamatí absorbansinya menggunakan spectronic 20", sehingga dþerclehkonsentrasi bakleri dan konsentrasi substrat (dalam mg/mL). Parameter yang dipelajari adalah pengruh perubahan pH pada air limbah terhadap konstanta kecepatan pertumbuhan bakteri. Dari hasil penelitîan didapat nilai konstanta laju pertumbuhan spesifik keadaan jenuh (0.403 / jam), dan yield terbesar (0.593) pada pH7,5 yang merupakan pH optimum pertumbuhan bakteri Bocillussphaericus.
Leaching SiO₂ On Coal Fly Ash As Ammonium Adsorbent In Tofu Liquid Waste Using Hydrothermal Method Danang Jaya; Anisa Anisa; Dian Prasetyani Basuki; Tunjung Wahyu Widayati
Eksergi Vol 19, No 3 (2022)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v19i3.8204

Abstract

Soybean is one of the main food commodities in Indonesia. One of the soybean processing that is often consumed is tofu. Inappropriate treatment of tofu liquid waste is very dangerous for life. It is noted that the ammonia content in tofu liquid waste is 23.3-23.5 mg/l which can cause odors that disturb the residents' comfort. One alternative solution for purifying tofu liquid waste is to carry out an adsorption process using coal fly ash. Fly ash contains metal oxides in the form of SiO₂, Al₂O₃, Fe₂O₃, CaO, MgO, K₂O, and Na₂O. The content of SiO₂ as much as 60-70% in it causes fly ash to be very potential to absorb ammonia levels. Extraction of SiO₂ using the sol gel method was carried out using fly ash that had gone through a hydrothermal process. The hydrothermal process is a crystallisation technique in a closed container with high temperature and pressure. After going through the extraction stage, the ongoing process was continued with the washing stage to produce silica powder to adsorb ammonium. The mass required for silica to achieve the optimum ammonia concentration adsorption efficiency is 0.25 gram/20 ml of tofu liquid waste. Meanwhile, the contact time required for silica to achieve the optimum adsorption efficiency of ammonium content is 30 minutes. It was noted that the silica from the optimised fly ash processing had a better quality than the unoptimized silica or commercial silica.
Investigasi dan Karakterisasi Pirolisis Ban Truk Fuso Canter FE71 Jaya, Danang; Widayati, Tunjung Wahyu; Izzulhaq, Muhammad Agung; Mirawati, Fevi
Eksergi Vol 20, No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.9637

Abstract

 Pengembangan dan keberlanjutan bidang energi di seluruh dunia merupakan hal yang sangat penting saat ini. Limbah yang berasal dari produk berbasis minyak bumi memiliki potensi yang cukup besar untuk menghasilkan energi. Limbah ban merupakan limbah yang susah membusuk, sehingga membutuhkan tempat yang luas untuk menyimpannya dan jika dibakar akan menimbulkan masalah baru. Salah satu upaya yang dapat dilakukan yaitu mengkonversi limbah ban bekas menjadi bentuk lain, yaitu tar dan arang sebagai energi alternative melalui proses pirolisis. Dalam studi ini, fokus kami adalah mengetahui pengaruh variasi suhu pirolisis, komposisi pada tar, dan nilai kalor pada arang dan tar hasil pirolisis ban truk Fuso Canter FE71. Suhu pirolisis yang digunakan yaitu 500, 600, 700, 800 °C selama 3 jam. Rendemen arang dan tar meningkat hingga titik optimum pada suhu 600 °C, kemudian menurun hingga suhu 800 °C. Komposisi tar dianalisis menggunakan Gas Chromatography-Mass Spectrometry yang menghasilkan 45,38% limonene; 19,82% benzene; 4,81% toluene; 10,91% xylene; dan 14,48% alkene. Nilai kalor tar dan arang diuji menggunakan alat Bomb Calorimeter. Tar dengan metode ASTM D040-19 menghasilkan nilai kalor 7.413,870 kal/g dan arang dengan metode ASTM D-2015-66 menghasilkan nilai kalor 7.878,918 kal/g.
Co-Authors Abdullah Effendi Anantyto Danujatmiko Anantyto Danujatmiko Anisa Anisa Aprilia Ramona Bagus Drajat Trimulyo Dian Prasetyani Basuki Ebeng Soegondo Endang Sulistyawati Fahmi Reza Octavianto Firda Ellysa Halim Nur Aziz Suwardi Hanum Salsabiela Hector Nack Izzulhaq, Muhammad Agung Mirawati, Fevi Muhammad Fathan Abdul Majid Muhammad Syahri Peggy Bunga Safitri Puji Raharjo Ragita Putri Rahayu Setiyaningtyas Refina Yuni Mustika Rico Mitchell Litaay Ryan Ade Bagus Singgih Adi Nugroho Sudiyono Prasetyo T.W. Widayati Tunjung Wahyu Widayati Tunjung Wahyu Widayati Tunjung Wahyu Widayati Widayati, Tunjung Wahyu