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All Journal ASEAN Journal of Systems Engineering Buletin Peternakan Jurnal Rekayasa Proses Reaktor Jurnal Ilmu Lingkungan JURNAL TEKNOLOGI LINGKUNGAN Jurnal Bahan Alam Terbarukan Eksergi Jurnal Ketahanan Nasional Seminar Nasional Teknik Kimia Kejuangan Jurnal Pamator : Jurnal Ilmiah Universitas Trunojoyo Madura Majalah Kulit, Karet, dan Plastik Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Sains & Teknologi Lingkungan Konversi Metal Indonesia Indonesian Journal of Chemistry Jurnal Rekayasa Proses Media Ilmiah Teknik Lingkungan Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan Jurnal Inovasi Teknik Kimia Jurnal Engine: Energi, Manufaktur, dan Material Jurnal Riset Entrepreneurship Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Sosial : Jurnal Ilmu-Ilmu Sosial Community Empowerment Prosiding SNAST Teknika STTKD: : Jurnal Teknik, Elektronik, Engine

Agus Prasetya

Universitas Gadjah Mada

Author-ID : 345050

Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Veterinary Other

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Pengolahan air limbah industri penyamakan kulit menggunakan abu terbang bagas secara batch Sholeh, Muhammad; Prasetya, Agus; Sarto, Sarto
Majalah Kulit, Karet, dan Plastik Vol 28, No 1 (2012): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

The objective of this research was to evaluate the adsorption ability of chemically activatedÂ bagasse fly ash using H O or H SO to remove COD from tannery wastewater and to obtain 2 adsorption isotherm model in batch system. Two stages have been carried out, namely the activation experiment and the adsorption isotherm experiment. In the activation experiment, effect of H O dan H SO (3% and 7,5% w/w) were studied. The best result of the variation was used in the next experiment. In the adsorption isotherm experiment, variation of the initial concentrations of COD from 52,53 to 1665,79 mg/L and mass of bagasse fly ash from 0,1 to 0,4 g were used. Equilibrium data was used to evaluate the parameters in the Langmuir, Freundlich, and Temkin equations. The best model was evaluated using determination coefficients. The results showed that bagas fly ash had better ability to reduce the COD when it was not activated with H O nor H SO (3% and 7,5%). Freundlich model was best to describe COD removal using bagasse fly ash in batch system. Freundlich equation constants K and n were F 0,4360 (mg/g)/(L/mg)1/n and 1,2969 respectively and the determination coefficient obtained was 0,93.Â Â Keywords: Chemical Oxygen Demand, tannery wastewater, bagasse fly ash, adsorption

Pemodelan matematis pengurangan COD dalam air limbah industri penyamakan kulit secara adsorpsi kontinyu menggunakan abu terbang bagas Prasetya, Agus; Sarto, Sarto; Sholeh, Muhammad
Majalah Kulit, Karet, dan Plastik Vol 29, No 1 (2013): Majalah Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

ABSTRACTThe objective of this research was to obtain suitable mathematical model for ChemicalOxygen Demand (COD) removal originated from tannery wastewater using bagasse fly ash incontinuous system. In the column experiment, effect of flowrate, concentration of wastewater,and bulk density were studied. Three models: Adams-Bohart, Thomas, and Yan were applied toexperimental data to predict the breakthrough curve. The best model was evaluated usingcorrelation coefficients. Yan model was found to give the most accurate to describe dynamicbehavior of the column experiment. The best result was obtained at flowrate of 100 mL/min,concentration of 400 mg/L, and bulk density of 61 g/L. The Yan kinetic constant (k ) and the Yadsorption capacity (q ) were 0.3210 mL/mg/min and 17.0947 mg/g respectively and the Ycorrelation coefficient obtained was 0.9379.Keywords: Chemical Oxygen Demand, tannery wastewater, bagasse fly ash, adsorptionABSTRAKpengurangan COD dalam air limbah industri penyamakan kulit mengunakan abu terbang bagassecara kontinyu. Variasi percobaan adsorpsi dalam kolom yang dilakukan yaitu: kecepatan aliranair limbah, konsentrasi air limbah, dan bobot isi. Persamaan Adams-Bohart, Thomas, dan Yandiaplikasikan ke data percobaan untuk memprediksikan kurva breakthrough. Koefisien korelasidigunakan untuk mengevaluasi model terbaik. Proses pengurangan COD dengan abu terbangbagas secara kontinyu dalam kolom paling cocok dimodelkan dengan model Yan. Hasil terbaikdiperoleh pada kecepatan aliran air limbah 100 mL/menit, konsentrasi air limbah 400 mg/L, danbobot isi 61 g/L. Parameter konstanta kinetika (k ) dan kapasitas adsorpsi (q ) yang diperoleh Y Yberturut-turut sebesar 0,3210 mL/mg/menit dan 17,0947 mg/g dengan nilai koefisien korelasiyang didapatkan yaitu 0,9379.Kata kunci: Chemical Oxygen Demand, air limbah industri penyamakan kulit, abu terbang bagas,adsorpsi

THE SYNTHESIS OF GLYCEROL CARBONATE FROM BIODIESEL BYPRODUCT GLYCEROL AND UREA OVER AMBERLYST 36 Senania, Astri; Sulistyo, Hary; Prasetya, Agus
Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.7691

The increasing use of biodiesel as renewable fuels leads to the increasing of glycerol amount as a byproduct of biodiesel production. One of the glycerol derivative products that is environmentally friendly and renewable is glycerol carbonate. Glycerol carbonate is commonly used as a raw material for polymers, surfactants, emulsifiers, lubricants, paints, also used in the cosmetics and pharmaceutical industries. In this study, the research was carried out by using a batch reactor with a three-neck flask equipped with reverse cooling, thermometers, mercury stirrer, and heating mantle with the conditions of the reaction temperature around 373 â 413 K, mole ratio of reactants of urea: glycerol were 1:0,5, 1:1, 1:1,5, 1:2 and 1:4Â and the concentration of catalyst were 1%, 2%, 3%, 4% and 5% respectively. Reaction was done for four hours. The results showed that the formation of glycerol carbonate from glycerol and urea using a catalyst Amberlyst 36 is affected by the catalyst concentration, reaction temperature and the ratio of reactants used. The highest glycerol conversion was obtained at 55.07% at a temperature of 393 K with mole ratio of urea and glycerol 1:0,5 and the percentage of catalyst 3% of the amount of glycerol.

HYDROTHERMAL LIQUEFACTION OF MAHOGANY (Swietenia macrophylla) SAWDUST mulhidin, mulhidin; Yuliansyah, Ahmad Tawfiequrrahman; Prasetya, Agus
Jurnal Bahan Alam Terbarukan Vol 7, No 1 (2018): June 2018 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v7i1.12410

Hydrothermal treatment is one of the thermochemical methods to convert complex organic compounds, such as organic waste and biomass, into upgraded solid, bio-oil, and other dissolved chemicals by utilizing the properties of water at near critical condition. Such method is very potential since the process is environmentally friendly and the products have more added values. In this research, conversion of mahogany sawdust (Swietenia macrophylla) using hydrothermal treatment method was studied. The experiments were conducted in a batch autoclave with temperature range of 200-300oC and initial pressure of 1 MPa. At targeted temperature, the process was hold for 30 minutes. In addition, biomass-water ratio (B/W ratio) for experiments was varied at 1:20, 2:20 and 3:20. The liquid products, which were characterized by Gas chromatography-Mass spectrometry (GC/MS) instrument, showed the presence of furfural and several organic acids, but no flavonoid compounds. Thus, coloring potential test of hydrothermal liquid was unsuccessful; there were not any color attached on the cloth specimen. On the other hand, proximate and ultimate test results indicated that solid products had high heating value (HHV) of 4625.34-4876.25 cal/g which were comparable to that of sub-bituminous coal.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v6i1.7691

The increasing use of biodiesel as renewable fuels leads to the increasing of glycerol amount as a byproduct of biodiesel production. One of the glycerol derivative products that is environmentally friendly and renewable is glycerol carbonate. Glycerol carbonate is commonly used as a raw material for polymers, surfactants, emulsifiers, lubricants, paints, also used in the cosmetics and pharmaceutical industries. In this study, the research was carried out by using a batch reactor with a three-neck flask equipped with reverse cooling, thermometers, mercury stirrer, and heating mantle with the conditions of the reaction temperature around 373 â€“ 413 K, mole ratio of reactants of urea: glycerol were 1:0,5, 1:1, 1:1,5, 1:2 and 1:4Â and the concentration of catalyst were 1%, 2%, 3%, 4% and 5% respectively. Reaction was done for four hours. The results showed that the formation of glycerol carbonate from glycerol and urea using a catalyst Amberlyst 36 is affected by the catalyst concentration, reaction temperature and the ratio of reactants used. The highest glycerol conversion was obtained at 55.07% at a temperature of 393 K with mole ratio of urea and glycerol 1:0,5 and the percentage of catalyst 3% of the amount of glycerol.

PERLAWANAN PEDAGANG KAKI LIMA TERHADAP KEBIJAKAN RELOKASI PEMERINTAH DAERAH Prasetya, Agus; Komara, Beni Dwi
Jurnal Riset Entrepreneurship Vol 2 No 2 (2019)
Publisher : Universitas Muhammadiyah Gresik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30587/jre.v2i2.955

This research was motivated by the fact that there was resistance from street vendors in Madiun City as a manifestation of people's resistance to the country. The city of Madiun, the capital city of Bakorwil 1, Madiun, is economically developing so that the number of street vendors explodes. Therefore this area is economically meaningful and has high economic value, so it becomes the goal of workers seeking, namely as street vendors. To organize the traders in the city of Madiun and the DPRD make a PKL Regional Regulation. The PKL Regional Regulation is intended to regulate the PKL selling in the city of Madiun. But the process that happened to street vendors was less involved, causing resistance. There was people's resistance to the state, because the state did not prosper the people. The regulation made by the DPRD and the Madiun city administration aims to keep traders in order, and implement the rules, but the regulation creates resistance. This study aims to: (1) understand the causes of the street vendors 'resistance (2) understand the meaning and purpose of street vendors' resistance to the Satpol PP. (3) understand the forms of street vendors' resistance to the Madiun city administration. The approach used in this study is qualitative with data collection techniques with observation, interviews and documentation. The paradigm in this study uses a social definition. While the theory used to explain the resistance of street vendors to the policies of the city government of Madiun James C. Scott's resistance theory.

Konstruksi Sosial pada Pedagang Tradisional dalam Menghadapi Era Kompetisi Perdagangan Bebas Komara, Beni Dwi; Prasetya, Agus
Jurnal Riset Entrepreneurship Vol 2 No 1 (2019)
Publisher : Universitas Muhammadiyah Gresik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30587/jre.v2i1.789

Article 33 of the 1945 Constitution aspires to the Indonesian economy being managed by the state with the aim of the prosperity of the Indonesian people. But the fact is that prosperity is only enjoyed by certain people and certain groups because the economy is only controlled by those who are only a small part of the Indonesian people. The growth of super markets, modern retail stores such as IndoMart, AlfaMart in all corners of the country, both villages and cities, has displaced traditional markets and caused traditional traders to go out of business. This is a violation of the constitution and must be stopped. Traditional traders are populist economic actors in the economic system, so the state must not commit arbitrariness, such as allowing competition, unhealthy competition between traditional traders and modern retail traders. This study aims: a). Knowing the need for social construction to traditional traders, b). what is the impact of the presence of modern retailers on traditional markets, c). the response of traditional traders to the mushrooming of IndoMart and AlfaMart, d). How should the local government protect Traditional market traders. This study uses a qualitative approach, with its social paradigm of social definition. Data retrieval through in-depth interviews, observation, documentation, while data analysis uses Interactive Miles and Hubermann Models. The results of the study show that it was necessary to do "Social Reconstruction" to traditional traders. The presence of modern markets has resulted in declining sales levels, the flight of buyers from the â€œSlekoâ€ market, â€œBesarâ€ market, and other traditional markets. This condition creates an "economic shock" for traditional traders because they felt their territory is "robbed" by traders who have large capital. If this condition is left uncontrolled, it would create social insecurity, namely traders become unemployed, beggars, which shall trigger an increase in crime rates. Local governments must act quickly by doing "Social Trader Reconstruction Traditional". A policy that was oriented to the economy of the people to revive traditional markets and allow traditional traders to resell. Don't treat people only become social objects! Economy, politics of politicians and regional governments at certain times such as the regional elections and the presidential election

Pengolahan Nitrifikasi Limbah Amonia dan Denitrifikasi Limbah Fosfat dengan Biofilter Tercelup Satria, Arysca Wisnu; Rahmawati, Merza; Prasetya, Agus
Jurnal Teknologi Lingkungan Vol. 20 No. 2 (2019)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

ABSTRACTWater pollution is a problem that often arises and gives a serious impact to the environment. Therefore, it should be reduced by conventional methods or modern methods. The submerged biofilter is a biological waste treatment plant that utilizing microorganisms grown in a packing medium. The advantages of submerged biofilter as a waste treatment plant are easy to use and low energy consumption so the operational cost is cheaper. This study aims to determine the operational parameters of the submerged biofilter and to develop a model that can be used to estimate the rate of elimination of each pollutant using nitrification reactor for ammonia and denitrification reactor for phosphate. The experiments were conducted with draining the wastewater in a cylindrical bio-filter column in which the hight is 90 cm. At first, the microorganism was grown for two weeks with the residence time of one day. Furthermore, the wastewater removals are conducted with hydraulic loading rate (HLR) variation of 0.44; 0.55; 0.74; 1.11; 1.66; 2.21; and 3.32 m3/m2/day. Then the effluent from the outlet is analyzed using UV-Vis Spectrophotometer. The results showed that the optimum ammonia and phosphate removal was obtained in 0.44 m3/m2/day for ammonia removal and 1.66 m3/m2/day for phosphate removal. While the removal of ammonia and phosphate percentage from both conditions are 97.41% and 27.16% respectively. The changes of HLR will give an effect on substrate reduction rate (SRR), and the percentage of substrate removal. The model developed based on efficiency factors presented a good approach to represent the concentration of substrate effluent at various HLR. Keywords: wasteswater, nitrification, denitrification, submerged biofilter ABSTRAKPencemaran air merupakan permasalahan yang sering muncul dan berpengaruh serius pada lingkungan. Oleh karena itu, perlu dilakukan usaha yang berkelanjutan untuk dapat mengurangi dampak dari pencemaran tersebut, baik dengan cara-cara konvensional maupun inovasi teknologi terbaru. Biofilter tercelup (submergedÃ‚Â biofilter)Ã‚Â adalah suatu alat pengolah limbah secara biologi dengan memanfaatkan mikroorganisme yang ditumbuhkan dalam media packing di dalamnya. Kelebihan penggunaan biofilterÃ‚Â tercelupÃ‚Â sebagai alat pengolah air limbah adalah pengelolaannya yang mudah dan konsumsi energi yang rendah sehingga biaya operasionalnya murah. Penelitian ini bertujuan untuk mengetahui parameter operasional biofilter tercelup dan mengembangkan model untuk memperkirakanÃ‚Â laju penyisihan setiap polutan menggunakan reaktor nitrifikasi untuk limbah amonia dan reaktor denitrifikasi untuk fosfat. Percobaan dilakukan dengan mengalirkan limbah pada sebuah kolom biofilter berbentuk silinderÃ‚Â dengan ketinggian 90 cm. Pada mulanya mikroorganisme ditumbuhkan dengan mengalirkan limbah selama dua minggu dengan waktu tinggal cairan satu hari. Selanjutnya dilakukan penyisihan limbah dengan variasi kecepatan beban hidrolik (HLR)Ã‚Â sebesar 0,44; 0,55; 0,74; 1,11; 1,66; 2,21; dan 3,32Ã‚Â m3/m2/hari. EffluentÃ‚Â dari keluaran reaktorÃ‚Â kemudian dianalisis menggunakan Spektrofotometer UV-Vis. Hasil penelitian menunjukkan bahwa kondisi optimumÃ‚Â penyisihan amonia dan fosfatÃ‚Â adalah 0,44 m3/m2/hari untuk penyisihan amonia dan 1,66Ã‚Â m3/m2/hari untuk penyisihan fosfat. Persentase removalÃ‚Â amonia dan fosfatÃ‚Â dari kedua kondisi tersebut berturut-turut sebesar 97,41% dan 27,16%. Perubahan HLR berpengaruh terhadap kecepatan penyisihan limbah (SRR), dan persentase limbahÃ‚Â tersisihkan. Model yang dikembangkan berdasarkan faktor efisiensi memberikan hasil yang cukup baik untuk merepresentasikan besarnya konsentrasi effluentÃ‚Â limbahÃ‚Â pada berbagai variasi HLRKata kunci: limbah cair, nitrikasi, denitrifikasi, biofilterÃ‚Â tercelupÃ‚Â

Pedagang Kaki Lima, Profil Entrepreneurship Sejati, Pelaku Ekonomi Kerakyatan, Ciptakan Jiwa Kewirausahaan Mandiri Prasetya, Agus
JURNAL SOSIAL : Jurnal Penelitian Ilmu-Ilmu Sosial Vol 20, No 1 (2019): JURNAL SOSIAL, Edisi Maret 2019
Publisher : Universitas Merdeka Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33319/sos.v20i1.35

This article is motivated by the fact that the existence of the Street Vendor (PKL) profession is a manifestation of the difficulty of work and the lack of jobs. The scarcity of employment due to the consideration of the number of jobs with unbalanced workforce, economically this has an impact on the number of street vendors (PKL) exploding ... The purpose of being a street vendor is, as a livelihood, making a living, looking for a bite of rice for family, because of the lack of employment, this caused the number of traders to increase. The scarcity of jobs, causes informal sector migration job seekers to create an independent spirit, entrepreneurship, entrepreneurship, with capital, managed by traders who are true populist economic actors. The problems in street vendors are: (1) how to organize, regulate, empower street vendors in the cities (2) how to foster, educate street vendors, and (3) how to help, find capital for street vendors (4) ) how to describe grief as a Five-Foot Trader. This paper aims to find a solution to the problem of street vendors, so that cases of conflict, cases of disputes, clashes of street vendors with Satpol PP can be avoided. For this reason, the following solutions must be sought: (1) understanding the causes of the explosions of street vendors (2) understanding the problems of street vendors. (3) what is the solution to solving street vendors in big cities. (4) describe Street Vendors as actors of the people's economy. This article is qualitative research, the social paradigm is the definition of social, the method of retrieving observational data, in-depth interviews, documentation. Data analysis uses Interactive Miles and Huberman theory, with stages, Collection Data, Display Data, Data Reduction and Vervying or conclusions.

Technology dissemination for Sambel Pecel business groups in Madiun City Prasetya, Agus; Komara, Beni Dwi; Dewi, Anggra Lita Sandra; Anshori, Shodiq
Community Empowerment Vol 6 No 6 (2021)
Publisher : Universitas Muhammadiyah Magelang

Sambel Pecel is one of the leading products and he driving force of the Madiun City economy. In fact, it has become an export commodity to various countries such as Malaysia, Saudi Arabia, Hong Kong, Singapore, Brunei and Taiwan. The problems faced by MSMEs were the use of traditional equipment and simple packaging. This service provides several solutions to overcome these problems. First, counseling and training on the pre-production process with the implementation of a peanut grinder. Second, the production process (shop floor) with the implementation of a fryer and peanut grinder (vacuum frying). Third, re-packaging for the post-production process with modern packaging technology. This tool makes the product more durable and certainly attracts consumer interest.

Co-Authors Agus Aktawan Ahmad Tawfiequrrahman Yuliansyah Ai Siti Patimah Alfiana Adhitasari AM Lelie Novia W Ambar Pertiwiningrum Angge Dhevi Warisaura Anggun Rahmada Anshori, Shodiq Arif Rahman Hakim Armaidy Armawi Astri Senania, Astri Aswati Mindaryani Awaluddin Nurmiyanto, Awaluddin Bagus Putro Budi Utomo Bengt Andersson Beni Dwi Komara Bidhari Pidhatika Brian Hayden Budi Kamulyan Cahyono, Rochim Bakti Dagus Resmana Djuanda Deden Ependi Dewi, Anggra Lita Sandra Dwi Saputri Dwi Saputri Dwi Tyaningsih Adriyanti Edhi Martono Edia Rahayuningsih Erlina Kurnianingtyas Erna Astuti Fadlilah, Ilma Fajar Marendra Fajar Marendra Fajar Marendra Farid Ma'ruf Felix Arie Setiawan Ferian Anggara Halomoan Siagian haries handoyo Hary Sulistyo Himawan T. B. M. Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Hotden Manurung I Made Bendiyasa I Made Bendiyasa Ilma Fadlilah Ilma Fatimah Yusuf Iman Haryanto Indah Noor Dwi Kusuma Dewi Indra Perdana Indra Perdana Kirana Dipta Rakhmasari Krister Ström Mahfudl Sidiq Muhayyat Maria Ratih Puspita Liestiono Martha Helsanggi Maulana Gilar Nugraha Mochamad Syamsiro Moh. Fahrurrozi Mudjijana Mudjijana - Muhammad A. A. Ramadhan, Muhammad Muhammad Arman Muhammad Hidayat Furqon Muhammad Sholeh MUHAMMAD SHOLEH Muhammad Sigit Cahyono mulhidin, mulhidin Novie Putri Setianingrum Novie Putri Setianingrum Panut Mulyono Prasakti, Laras Radwinda Kurnia Putri Rahmawati, Merza Rikhanatul Firdausy Puspitasari Rikhanatul Firdausy Puspitasari Rima Dewi Anggraeni Rizka Lestari Rizki Laksono, Rizki Rochmadi Rochmadi Ruslim Budianto Sarah Nabila Salma Sarto Sarto Sarto Sarto Sarto Sarto Sarto Satria, Arysca Wisnu Satryo Dewanto Suryohendrasworo Sigit Heru Murti Sihana - Sihana - Siti Syamsiah Stenly Recky Bontinge Supranto - Supranto Supranto Teguh Ariyanto Tri Winarni Soenarto Putri Ula, Rahmah Arfiyah Ulan Paluti Agustina Wahyu Wilopo Widi Astuti Widodo - Widya Rosita Zaizamshimi Nurul Farah Dyana

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