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All Journal International Journal of Advances in Applied Sciences Reaktor SPEKTRUM INDUSTRI Jurnal Bahan Alam Terbarukan CHEMICA Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan Jurnal Riset Kimia JURNAL KONVERSI Jurnal Pendidikan Dasar Jurnal Pengabdian Pada Masyarakat Sains Natural: Journal of Biology and Chemistry Jurnal Chemurgy CHEESA: Chemical Engineering Research Articles Jurnal Pengabdian Masyarakat Bumi Raflesia Yumary: Jurnal Pengabdian kepada Masyarakat J-MIND (Jurnal Manajemen Indonesia) Abdimas Indonesian Journal Pelita: Jurnal Pengabdian kepada Masyarakat Indonesian Journal of Chemical Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN
Maryudi Maryudi
Universitas Ahmad Dahlan
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Pengaruh Panjang Kolom Distilasi Bahan Isian Terhadap Hasil Produk Cair Sampah Plastik Isti Nur Azizah; Ninda Puspita Sari; Maryudi Maryudi
CHEMICA: Jurnal Teknik Kimia Vol 2, No 1 (2015): Juni 2015
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (557.252 KB) | DOI: 10.26555/chemica.v2i1.4563

Abstract

Plastic waste is a problem that has to be taken seriously for the pollution of the environment, especially for land contamination. For now, the handling of plastic waste is normally disposed (landfills), burned, or recycled (recycle). The burning of plastic waste is usually carried out by the pyrolysis method to produce plastic oil. To get the maximum results needed further analysis in the form of purification by distillation, where the distillation is a method that can be used for advanced analysis, one with a distillation column. Fractional distillation often called the distillation column is to separate liquid components, two or more, of a solution based on differences in their boiling points. This distillation can also be used to mix with a boiling point of less than 20°C and work at atmospheric pressure or low pressure. Application of this type is used in the distillation of crude oil industry, to separate the components in the crude oil distillation Differences simple fractionation and distillation is the fractionation column. In this column, warming occurs gradually with different temperatures on each license plate. Different heating is intended for refining distillates from the plates underneath. Getting to the top, the less volatile liquid. The distillation process depends on the characteristics of the vapor pressure of a liquid mixture of components.The distillate was obtained at a temperature of 195oC, 200oC, 220oC, 235oC, and 240oC and the most products component of pyrolysis plastic in previous research was obtained at 195oC, 200oC, and 220oC
Karakteristik Torrefaksi dan Densifikasi Limbah Tandan Kosong Kelapa Sawit Maryudi Maryudi
CHEMICA: Jurnal Teknik Kimia Vol 1, No 2 (2014): Desember 2014
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (855.656 KB) | DOI: 10.26555/chemica.v1i2.3573

Abstract

Energy demand increases continuously due to the growth of industries. Most industries still rely on fossil fuel and its price commonly increases and the deposit in the universe decreases since it is not a renewable resource. Indonesia is the largest palm oil producer in the world that has potential abundance biomass of empty fruit bunch (EFB) of oil palm. It can be an alternative energy source. The EFB is commonly used as fuel for the heat source of boiler in the palm oil plant. Most applications were by conventional combustion process that has the disadvantage of low energy value. The EFB was only chopped and grinded, and then dried prior to the combustion process. This study investigates the improvement of energy quality of EFB through torrefaction (or light pyrolysis) and the densification process. The EFB was chopped in small size and grinded in the form of fiber, then dried. The EFB fiber in small slices was pressed in a small steel tube and heated in the range of 200-300 °C. The variables of the study were the duration and temperature of the process. The initial heat value of EFB was 18,241 MJ/kg that slightly lower than its kernel shell heat value of 19,955 MJ/kg. The water content was found at 6.28% and 4.31% for EFB and kernel shell respectively. Results have shown that torrefaction and densification have improved the calorific value of EFB in the range of 6.58-16.71% of its initial value. On the other hand, the energy yield has decreased to 97.54, 97.26, and 93.76% of its initial energy yield for torrefaction temperature of 200, 250, and 300 °C respectively.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (747.422 KB) | DOI: 10.24853/konversi.9.1.5

Abstract

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.
Pemanfaatan Limbah Cair Tahu menjadi Biogas di Industri Tahu Murni Pak Min Jomblangan, Banguntapan, Yogyakarta Lukhi Mulia Shitophyta; Siwi Purwanti; Maryudi Maryudi
Jurnal Pengabdian Pada Masyarakat Vol 4 No 4 (2019)
Publisher : Universitas Mathla'ul Anwar Banten

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (640.627 KB) | DOI: 10.30653/002.201944.191

Abstract

COMMUNITY PARTNERSHIP PROGRAM: THE UTILIZING OF TOFU LIQUID WASTE INTO BIOGAS AT TOFU INDUSTRY OF PAK MIN, JOMBLANGAN, BANGUNTAPAN, YOGYAKARTA. The industry tofu of Pak Min is a home industry with four employees which produces 200 kg of tofu every day and generates 50 kg of liquid wastes per day. The problem that is faced by the industrial owner is the lack of knowledge in handling liquid wastes. The disposal of waste is only discharged into a river which results in buildup of liquid paddles on the ground surface and environmental pollution. Therefore, the objectives of this program were to socialize the hazard and management process of tofu waste and to provide the training to convert tofu liquid waste into biogas.
Reduction of COD, pH and Phosphate Levels in Laundry Wastewater Using Multi Soil Layering (MSL) Method Aster Rahayu; Maryudi Maryudi; Nuraini Nuraini; Nafira Alfi Zaini Amrillah; Irwan Mulyadi; Farah Fadillah Hanum
JURNAL SAINS NATURAL Vol. 13 No. 1 (2023): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v13i1.450

Abstract

The growth of laundry services is directly proportional to the use of detergent. Detergent is a cleaning product that contains high levels of COD and phosphate. One method that can be used to overcome this problem is Multi Soil Layering (MSL). This research focussed on the flow rate's effect on decreasing pH, COD, and phosphate levels in industrial laundry waste. MSL was installed using a mixture of andosol soil and activated charcoal from coconut shells. Laundry wastewater was let into MSL with flowrate: 10, 50, and 100 ml/minute. The waste degradation system is placed anaerobically by optimising the anaerobic process in the andosol soil. The pH, COD, and phosphate levels were achieved at 7, 90.9%, and 80.7% by draining the laundry industry waste into the MSL system. This MSL method has a residence time of 266 minutes for a flowrate of 100 mL/minute, 532 minutes for a flowrate of 50 mL/minute and 2660 for a flowrate of 10 mL/minute. Keywords:  MSL;  Phosphate;  COD;  Laundry Industry; Andosol soilABSTRAKPenurunan Kadar COD, pH dan Fosfat pada Air Limbah Laundry Menggunakan Metode Multi Soil Layering (MSL)Pertumbuhan jasa laundry berbanding lurus dengan penggunaan detergen. Detergen merupakan produk pembersih yang mengandung COD dan fosfat dalam kadar tinggi. Salah satu cara yang dapat digunakan untuk mengatasi masalah tersebut adalah Multi Soil Layering (MSL). Penelitian ini berfokus pada pengaruh laju alir terhadap penurunan pH, COD, dan kadar fosfat pada limbah laundry industri. MSL dipasang menggunakan campuran tanah andosol dan arang aktif dari tempurung kelapa. Air limbah laundry dimasukkan ke dalam MSL dengan debit aliran: 10, 50, dan 100 mL/menit. Sistem degradasi sampah ditempatkan secara anaerobik dengan mengoptimalkan proses anaerobik di tanah andosol. Kadar pH, COD, dan fosfat dicapai pada 7, 90,9%, dan 80,7% dengan mengalirkan limbah industri laundry ke dalam sistem MSL. Metode MSL ini memiliki waktu tinggal 266 menit untuk laju alir 100 mL/menit, 532 menit untuk laju alir 50 mL/menit dan 2660 untuk laju alir 10 mL/menit.Kata kunci: MSL; Fosfat; COD; Industri Laundry; Tanah Andosol
Mechanical Characteristics of Epoxy Composite With Rice Husk Charcoal Filling Material Maryudi Maryudi; Farrah Fadhillah Hanum; Oktaza Loundi Vidinda; Arif Dwi Anto
Indonesian Journal of Chemical Engineering Vol. 1 No. 1 (2023): Indonesian Journal of Chemical Engineering
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/ijce.v1i1.457

Abstract

Advancements in science and innovation in the modern world have led to a growing demand for materials in the production of goods. The utilization of materials in the manufacturing process has been reduced. This is due to the heaviness, costliness, susceptibility to corrosion, and complex assembly systems of metal materials compared to natural fibers. One of the materials currently under development is composites. Composites are a mixture of at least two materials that vary in shape, chemical structure, and are non-disintegrating. The aim of this study is to explore the fabrication and influence of rice husk volume fraction in epoxy composites, as well as to test their tensile strength and composite characteristics. The methodology involves preparing the raw materials (rice husk charcoal, epoxy resin, epoxy hardener, and silicon spray), rice husk charcoal preparation, epoxy production from resin and epoxy hardener, and composite manufacturing with volume fractions of 10%, 20%, and 30% following ASTM D-638 standards. The testing of composite characteristics through tensile tests yields varying tensile strengths. The highest tensile strength is found in composites with a volume fraction of 10%, while the lowest tensile strength is found in composites with a volume fraction of 30%.
Degradasi Limbah Detergen dengan Metode Fotokatalis Menggunakan TiO2 / Silica Gel Amelia, Shinta; Jamilatun, Siti; Shitopyta, Lukhi Mulia; Maryudi, Maryudi; W, Mila Utami; Sriyana, Ida
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.v20i3.9214

Abstract

Limbah detergen dihasilkan dari laundry dan limbah rumah tangga yang menyebabkan pencemaran air yang merusak organisme dalam perairan. Detergen terdiri atas tiga komponen utama, yaitu surfaktan, builders dan aditif. Surfaktan jenis Alkyl Benzene Sulfonat (ABS) dan Linear Alkylbenzene Sulfonate (LAS) merupakan senyawa aktif detergen. Tujuan dari penelitian ini untuk mempelajari proses degradasi fotokatalis dalam menurunkan konsentrasi LAS dan ABS dengan variabel bebas konsentrasi bahan aktif detergen dan waktu penyinaran. Pengolahan limbah detergen yang digunakan pada penelitian ini adalah metode fotokatalis TiO2 dengan penyangga silica gel. Variasi konsentrasi LAS dan ABS yaitu 50 ppm dan 100 ppm menggunakan katalis silica gel /SiTiO2 sebanyak 0,05gram dengan variasi waktu penyinaran sinar UV sampai 24 jam. Persentase degradasi yang dihasilkan dalam waktu 24 jam dengan katalis silica gel-TiO2 pada ABS 50 ppm yaitu 96,08% dan ABS 100 ppm yaitu 99,00%. Sedangkan Persentase degradasi yang dihasilkan dalam waktu 24 jam dengan katalis silica gel-TiO2 pada LAS 50 ppm yaitu, 96,61% dan LAS 100 ppm yaitu 99,61%. Penggunaan katalis silica gel - TiO2 dalam LAS lebih efektif dan  mempunyai sifat yang lebih baik dibandingkan ABS karena LAS mudah terurai sehingga semakin lama penyinaran warna larutan menjadi pudar dan proses degradasi fotokatalis menjadi lebih mudah.
Application of Cellulose Acetate Propionate Biopolymer Membrane in The Treatment of Textile Wastewater Containing Remazol Dye Amilia, Amilia; Maryudi, Maryudi; Rahayu, Aster; Hakika, Dhias Cahya; Suradi, Siti Samahani
Jurnal Bahan Alam Terbarukan Vol 13, No 1 (2024): June 2024 [Nationally Accredited Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v13i1.50294

Abstract

Textile liquid waste is pollution resulted from textile industry activities that often produce hazardous and toxic materials. Therefore, appropriate processing techniques are needed. There are many processing methods that can be used in treating this textile liquid waste, one of which is using membrane technology with phase inversion techniques. Membrane technology has advantages over other processing methods such as, being biopolymeric, relatively lower energy consumption, does not use chemicals in the processing process, and does not cause new waste in the processing process.  In this study, 3 variations of cellulose acetate propionate (CAP) concentration were carried out in the manufacture of membranes including, 13% CAP; 14% CAP; and 15% CAP. Membranes that have been made are then carried out several analyses, namely porosity analysis; flux analysis; rejection analysis; and color concentration reduction analysis. The results in this study found that the highest porosity value, rejection value and flux value were found in the CAP membrane with a concentration of 13%.  The CAP membrane has the best rejection value on reducing the remazol concentration of 43% with a membrane of 13% CAP.
Sosialisasi dan Implementasi Pemanfaatan Spirulina Sebagai Bahan Kosmetik Alami dan Suplemen Kesehatan Bagi Masyarakat Kelurahan Caturharjo Pandak Bantul Permadi, Adi; Maryudi, Maryudi; Nuraisyah, Fatma; Khakim, Mufti; Baswara, Ahmad Raditya Cahya; Aziz, Abdul; Hadi, Sofyan; Sinaga, Alexander Maruli Tua; Anugrah, Nawang; Ramadhan, Muhammad Kaisar Sutomo; Firdaus, Stradivary Maulida; Hakim, Muhammad Arif Lukman; Sofiana, Nurani
Abdimas Indonesian Journal Vol. 4 No. 1 (2024)
Publisher : Civiliza Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59525/aij.v4i1.336

Abstract

The village of Caturharjo Pandak Bantul has had a tradition of using natural cosmetic ingredients in skin care and health, but the trend of the commercial cosmetics industry has shifted people's interest towards using natural ingredients. Public problems related to cosmetics include a lack of knowledge about cosmetic safety, beauty pressure, and the circulation of illegal cosmetic products. Community Service (PKM), which involves collaboration between the Caturharjo sub-district and the Ahmad Dahlan University community service team, aims to provide a solution by utilizing spirulina as a natural cosmetic ingredient and health supplement. Problem solving is carried out through educational activities, demonstrations on making and using facial cosmetics from spirulina, as well as monitoring and evaluation. The spirulina product used is the result of research funded by the Kedaireka Matching Fund in 2022 which has received BPOM permission and is considered suitable for consumption. This PKM also produces output in the form of a video recording which is published on the LPPM UAD YouTube channel and has Intellectual Property Rights (IPR) on the video. Through this outreach, it is hoped that the public can increase awareness in using cosmetics and understand the benefits of spirulina for health.
Mechanical Characteristics of Epoxy Composite With Rice Husk Charcoal Filling Material Maryudi, Maryudi; Hanum, Farrah Fadhillah; Loundi Vidinda , Oktaza; Dwi Anto , Arif
Indonesian Journal of Chemical Engineering Vol. 1 No. 1 (2023)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/ijce.v1i1.457

Abstract

Advancements in science and innovation in the modern world have led to a growing demand for materials in the production of goods. The utilization of materials in the manufacturing process has been reduced. This is due to the heaviness, costliness, susceptibility to corrosion, and complex assembly systems of metal materials compared to natural fibers. One of the materials currently under development is composites. Composites are a mixture of at least two materials that vary in shape, chemical structure, and are non-disintegrating. The aim of this study is to explore the fabrication and influence of rice husk volume fraction in epoxy composites, as well as to test their tensile strength and composite characteristics. The methodology involves preparing the raw materials (rice husk charcoal, epoxy resin, epoxy hardener, and silicon spray), rice husk charcoal preparation, epoxy production from resin and epoxy hardener, and composite manufacturing with volume fractions of 10%, 20%, and 30% following ASTM D-638 standards. The testing of composite characteristics through tensile tests yields varying tensile strengths. The highest tensile strength is found in composites with a volume fraction of 10%, while the lowest tensile strength is found in composites with a volume fraction of 30%.
Co-Authors Abdul Aziz Achmad Saidi Noor Adi Permadi Adi Permadi Adi Permadi, Adi Agus Aktawan, Agus Amelia, Shinta Amilia Amilia, Amilia Amillia, Amillia Anugrah, Nawang Anwaruddin Hisyam Anwaruddin Hisyam Arif Dwi Anto Azhar , Muh. Azizah, Isti Nur Baswara, Ahmad Raditya Cahya Candra, Syahrul Dwi Adi Chusna, Firda Mahira Alfiata Dewi, Kartika Tunggal Dhias Cahya Hakika Dimas, Doni Dwi Anto , Arif Erna Astuti Farah Fadillah Hanum Farrah Fadhillah Hanum Fatma Nuraisyah, Fatma Firdaus, Stradivary Maulida Hakim, Muhammad Arif Lukman Hanum, Farrah Fadhillah Hapsari, Intan Tri Hayuningtyas, Ratih Hendry Pangestu Hisyam, Anwaruddin Imam Santosa Irwan Mulyadi Ismanto, Deny Isti Nur Azizah Kurniawan, Lutfi Loundi Vidinda , Oktaza Lukhi Mulia Shitophyta Lutfi Firmansyah, Lutfi Matriadi, Faisal Mohammed, Hamad Khudhair Mufti Khakim, Mufti Muhammad Hakiim Marzun Muhammad Kresna Islami Muhtar Hamdan, Muhtar Munawaroh, Annisa Luthfiana Nafira Alfi Zaini Amrillah Nazzal, Sami Ninda Puspita Sari Novia Rahmawati Nur Halimah Nuraini Nuraini Oktaza Loundi Vidinda Padya, Syaeful Akbar Pratiwi, Margaretha Herlin Rahayu, Aster Rahman, Zulfan Hanif Ramadani, Noorpani Ramadhan, Muhammad Kaisar Sutomo Refah Syauqi Sari, Ninda Puspita Satria, Puji Selang, Sartika S. Sembiring, Nisya Silvani Shinta Amelia Shitopyta, Lukhi Mulia Sinaga, Alexander Maruli Tua Siti Jamilatun Siti Salamah Siti Salamah Siti Salamah Siwi Purwanti Soedjatmiko Sofiana, Nurani Sofyan Hadi Sriyana, Ida Sugiatno Sugiatno Suhendra Suhendra Suradi, Siti Samahani Totok Eka Suharto Veranica Veranica, Veranica W, Mila Utami Wardana, Mikael Dia Widyaningrum, Sri Rahayu Yahya, Asdarina Zahrul Mufrodi, Zahrul Zufar, Ahmad Fatwa