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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: Chemical Engineering Journal Jurnal Ketahanan Nasional Seminar Nasional Teknik Kimia Kejuangan Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) 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 Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Communications in Science and Technology Jurnal Rekayasa Proses Jurnal Ilmiah Pendidikan dan Pembelajaran Media Ilmiah Teknik Lingkungan Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan INSIST (International Series on Interdisciplinary Research) Jurnal Inovasi Teknik Kimia Jurnal Engine: Energi, Manufaktur, dan Material ASEAN Journal of Chemical Engineering Kontribusia : Research Dissemination for Community Development Jurnal Riset Entrepreneurship GANDRUNG: Jurnal Pengabdian Kepada Masyarakat Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Sosial : Jurnal Ilmu-Ilmu Sosial Community Empowerment Prosiding SNAST International Journal of Computer and Information System (IJCIS) Teknika STTKD: : Jurnal Teknik, Elektronik, Engine Envirotek : Jurnal Ilmiah Teknik Lingkungan Sharia Agribusiness Journal Journal of Educational and Cultural Studies Hexagon DEDIKASI : Jurnal Pengabdian Kepada Masyarakat Jurnal Edukasi Pengabdian Masyarakat: EDUABDIMAS Revenue Manuscript Jurnal Rekayasa Proses Jurnal Pengabdian, Riset, Kreativitas, Inovasi, dan Teknologi Tepat Guna (Parikesit) Educational Management
Agus Prasetya
Universitas Gadjah Mada
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Pengurangan Kadar Chrom dari Limbah Cair Industri Menggunakan Sistem Sub-Surface Flow Constructed Wetland (Ssf-Cw) dengan Tanaman Akar Wangi pada Media Kerikil dan Granul Fly Ash Hasanah, Nur Hayati; Yuliansyah, Ahmad Tawfiequrrahman; Prasetya, Agus
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Sub-Surface Flow Constructed Wetland (SSF-CW) is one of the engineered of sewage treatment systems built and designed involving aquatic plants, soil or other media and related microbes, with more controlled treatment using sub-surface flow types. The purpose of this study was to determine the ability of aquatic plants to reduce of chromium (Cr) in wastewater, to understand the effect of fly media ash and gravel media in the constructed wetland system in reducing chrom  in wastewater. The Constructed Wetland was designed made of plastic with the Sub-Surface Flow Constructed Wetland (SSF-CW) model with 3 zones, zone 1 which is inlet zone and zone 3 which is outlet having dimensions of 37 x 54.5 x 60 cm, while zone 2 which is a reaction zone with dimensions 75 x 52.6 x 43.5 cm. The results showed that overall chrom removal from wastewater in RI, RII, RIII was 85.76, 93.24, and 74.69%, respectively. During the study, there was a growth of the plants, indicated by the presence of new shoots and an increase in the weight of plants. The kinetic model for reducing chromium content in wastewater at the RI, RII and RIII reactors follows the first order equation with a value of k value of 5.3411; 2,4006; and 0.1330.
Sintesis Copper-Nanoparticles dari Limbah Leaching Kalkopirit Sebagai Zat Antibakteri dengan Metode Reduksi Wibowo, Decka Pynka; Kusumastuti, Yuni; Prasetya, Agus; Asih, Yekti; Petrus, Himawan T.B.M; Idrus, Arifudin
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Nanoparticle technology has been widely used in various industries because of its advantages in particle size control systems. One example of the use of nanoparticle technology is copper nanoparticles as an antibacterial material. This research focuses on the utilization of leaching waste as a material for the synthesis of copper nanoparticles. The synthesis of copper nanoparticles was carried out by chemical reduction method between chalcopyrite stone leaching waste namely CuSO4 as precursor, Cetyl Trimethyl Ammonium Bromide (CTAB) as surfactant and NaBH4 reducing agent. The synthesized material will be analyzed using UV-Vis spectroscopy. Furthermore, the particle size will be estimated using PSA and its antibacterial properties will be analyzed using the well diffusion method by looking at the effectiveness of the inhibitory power against Escherichia coli FNCC 0049 and Staphylococcus bacteria aureus FNCC 0047. The results of the synthesis obtained the smallest size of 235.7 nm from the ratio of precursor concentration, reducing agent concentration and, a surfactant concentration of 1:20:8. The results of the synthesis of copper nanoparticles with concentrations of 10.000 ppm showed the presence of inhibitory power to overcome Escherichia coli FNCC 0049 and Staphylococcus bacteria aureus FNCC 0047.
Studi Recovery Tembaga pada Proses Froth Flotation dari Bijih Tembaga Papua, Indonesia dengan Variasi pH dan Konsentrasi Kolektor Heimbach, Ivano; Petrus, Himawan Tri Bayu Murti; Prasetya, Agus; Idrus, Arifudin; Timotius, Daniel; Kusumastuti, Yuni; Sutijan, Sutijan
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

In the process of flotation of copper-bearing ore, several factors such as the concentration of the collector used and the pH of the fluid used can have an impact. In this study, observations were made on the influence of collector concentration and pH on the recovery of copper ores from Papua, Indonesia. The ore samples were obtained from three different site. Preparation of samples were conducted by crushing and sieving to obtain solid particles with a size of +200 mesh. The fine particles then fed into froth flotation device. Froth flotation operations were carried out at different operating condition namely pH (pH 3, pH 6, and pH 9), xanthate concentration (1300, 2000, and 2600 ppm), and time (3, 5, 7, and 14 minutes). The froth and tailings were collected separately and dried in an oven at 60oC. The feed, froth, and tailings were then subjected to EDX analysis to determine their compositions. The results of the experiment showed that higher collector concentrations did not necessarily lead to increased copper recovery. The appropriate pH conditions, however, could optimize copper recovery. The optimum conditions obtained from this experiment were xanthate concentration of 2000 ppm, pH of 3, and the ore sample 2
Model Pengembangan Kewirausahaan Berbasis Santri: (Studi Pada Pondok Pesantren Rahmatan Lil Alamin Nganjuk Jawa Timur) Setiawan, Heri Cahyo Bagus; Fatimah, Nuzulul; Ilham, Ilham; Kurniawan, Aries; Latukismo, Tatag Herbayu; Prasetya, Agus
Revenue Manuscript Vol. 2 No. 3 (2024): Mei
Publisher : Asosiasi Riset dan Pengembangan Manusia Berkelanjutan (ORBIT)

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Abstract

Tujuan dari program PKM ini adalah untuk memberikan pelatihan dasar kewirausahaan digital kepada para santri di Pondok Pesantren Rahmatan Lil Alamin Kabupaten Nganjuk, Provinsi Jawa Timur. Pelatihan kewirausahaan digital diharapkan dapat meningkatkan pengetahuan, wawasan dan skill entrepreneurship santri. Program PKM di ikuti oleh santri sebanyak 260 orang. Metode yang digunakan adalah ceramah, diskusi dan tanya jawab. Hasil yang dicapai adalah: (1) santri memiliki pengetahuan memahami dasar kewirausahaan; (2) santri di motivasi dan dibangun karekternya menjadi karakter entrepreneur bagaimana kiat menjadi entrepreneur berbasis digital yang santri (model santripreneur); dan (3) santri mempresentasikan rencana bisnis dengan ciri khas model santri (model santripreneur).
ENVIRONMENTAL REVIEW INSTALASI PENGOLAHAN AIR LIMBAH (IPAL) KOMUNAL DI INDONESIA: STUDI KASUS IPAL KOMUNAL DI KABUPATEN SLEMAN YOGYAKARTA marendra, fajar; Saputri, Dwi; Prasetya, Agus; Yuliansyah, Ahmad Tawfiequrrahman
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4157

Abstract

he communal domestic wastewater treatment plant (WWTP) in Distrik of Sleman, Yogyakarta built in 2006 and the latest in 2018. In this study, the assessment of six environmental aspects, quality of effluent, geographic location, land topography, receiving water bodies, floods hazard, and soil types, was carried out in the communal WWTP in the District of Sleman, Yogyakarta. Data collection techniques using Stratified Random Sampling combine with interview technic and field surveys, then an assessment is carried out based on the Likert scale. The results showed that the quality of effluent aspect gets an average score of 2.57, soil types (2.60), geographic location (2.83), land topography (3.13), receiving water bodies (3.17), and floods hazard (3.63). The quality of effluent aspect can improve by integrated with fixed bed process or electrochemical process. Overall, the environmental category of WWTP in the District of Sleman, Yogyakarta, gets an average score of 2.99 from the maximum value of 4 (quite a good).
Investigating the impact of nanoparticle geothermal silica loading on the mechanical properties and vulcanization characteristics of rubber composites Syabani, Muh Wahyu; Rochmadi; Perdana, Indra; Prasetya, Agus
Communications in Science and Technology Vol 8 No 1 (2023)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.8.1.2023.1190

Abstract

The present study investigates the effects of nanoparticle geothermal silica (NGS) on the mechanical properties and vulcanization characteristics of rubber compounds with various filler loadings. The rubber compounds were filled with 0, 20, 30, and 40 phr of silica. The properties of NGS were analyzed using transmission electron microscopy, particle size analyzer, and BET surface area analysis to examine its morphology, size distribution, and surface area. The mechanical properties and vulcanization characteristics of the rubber compounds reinforced with NGS were evaluated using a universal testing machine and moving die rheometer. The results showed that NGS possessed the primary particle sizes below 20 nm and a surface area of 168.35 m2/g. The interaction between silica and rubber determined the modulus of the rubber composites and the vulcanization characteristics. The tensile strength of the rubber compounds, meanwhile, showed a significant increase more than threefold as the filler loading increased from 0 phr to 30 phr, followed by a slight decline at 40 phr loading. The addition of 20 phr of silica led to a prolonged scorch time compared to the filler-free compound due to the adsorption of activators and accelerators. However, the scorch time decreased after reaching 30 phr of silica loading, which could be attributed to the higher amount of bound rubber covering a portion of the silica surface, thereby reducing its ability to adsorb the activator. The presence of silica with good thermal conductivity enabled a better heat transfer during the vulcanization process, resulting in shorter curing times for higher loading. Rubber compounds with an NGS loading of 30 phr demonstrated a favorable balance between filler-rubber interactions, vulcanization characteristics, and mechanical properties in the rubber compounds.
Improving Teacher Competence in Developing Learning Implementation Plans Through Clinical Supervision at SLBN Pembina Province of East Kalimantan Prasetya, Agus
Educationist: Journal of Educational and Cultural Studies Vol. 1 No. 1 (2022): Journal of Educational and Cultural Studies
Publisher : PT Literasi Nusantara Publisher

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Abstract

This research is motivated by the problem of weak teachers in preparing Learning Implementation Plans (RPP). The purpose of this study was to describe the increase in teacher competence in preparing lesson plans through clinical supervision at SLBN Pembina Prov. East Kalimantan, Samarinda City District. This research is a type of School Action Research (PTS) through cycles consisting of 4 stages, namely: planning, implementing, observing, and reflecting. The subjects of this research were two class teachers. Data collection techniques used in this study are: documentation, observation, and interviews. The data analysis used in this study is descriptive quantitative data analysis which originates from observation and evaluation data.
Low-Grade Ilmenite Leaching Kinetics Using Hydrochloric Acid: RSM and SCM Approaches Supriyatna, Yayat Iman; Prasetya, Agus; Astuti, Widi; Sumardi, Slamet; Natalia, Priskila; Adythia, Dicky Marsa; Petrus, Himawan Tri Bayu Murti
Indonesian Journal of Chemistry Vol 24, No 3 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.79092

Abstract

Minerals containing TiO2 are common in Indonesia, such as ilmenite in iron sand deposits scattered along the country's coasts. Ilmenite is an important source of titanium. One method for making TiO2 from ilmenite is by solubilizing both the Fe and Ti elements in HCl and then immediately hydrolyze the Ti. The leaching of low-grade ilmenite (ground to 0.177-0.149 mm) is studied kinetically by HCl in a stirred reactor. The research was conducted using the caustic fusion method followed by HCl leaching. The leaching reaction kinetics at the optimum conditions are analyzed using response surface methodology (RSM) with a second-order polynomial equation model and SSE with the shrinking core model (SCM). The results showed that HCl concentration and leaching time were directly proportional to the leached titanium concentration. In contrast, the leaching temperature was inversely proportional. The optimum operating conditions were obtained at a temperature of 30 °C, 9 M HCl, and 120 min of leaching time. The shrinking core model is a better representation of the kinetics than RSM with a second-order polynomial equation model. Based on SCM, the rate of the leaching reaction of titanium from low-grade ilmenite is controlled by diffusion through the ash layer.
Kajian dampak lingkungan pada sistem produksi listrik dari limbah buah menggunakan life cycle assessment Fajar Marendra; Anggun Rahmada; Agus Prasetya; Rochim B. Cahyono; Teguh Ariyanto
Jurnal Rekayasa Proses Vol 12 No 2 (2018): Volume 12, Number 2, 2018
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.36425

Abstract

Producing biogas by anaerobic digestion (AD) is a promising process that can simultaneously provide renewable energy and dispose solid waste safely. However, this process could affect environment e.g. due to greenhouse gas emissions. By life cycle assessment (LCA), we assessed the environmental impact (EI) of an integrated fruit waste-based biogas system and its subsystems of Biogas Power Plant Gamping. Data were collected from an actual plant in Gamping, Sleman, Yogyakarta, Indonesia that adopted a wet AD process at mesophilic condition. The results showed that the global warming potential (GWP) emission of the system reached 81.95 kgCO2-eq/t, and the acidification potential (AP), eutrophication potential (EP), human toxicity potential (HTPinf) and fresh water ecotoxicity (FAETPinf) emissions were low. The EI was mainly generated by two subsystems, namely, the electricity generation and the digestate storage. A comparison analysis showed that the GWP become the main contributor of environmental loads produced by Biogas Plant Gamping, Suazhou Biogas Model, Opatokun Biogas Model, Opatokun Pyrolisis Model, dan Opatokun Integrated System Anaerobic Digestion and Pyrolisis. The GWP impact control and reduction could significantly reduce the EI of the system. It has been shown that improving the technology of the process, the electricity generation and the digestate storage will result in the reduction of EI of the biogas system.
Densification process of merbau (Intsia bijuga) and matoa (Pometia pinnata J.R. Forster & J.G Forster) sawdust waste for biomass based solid fuel source in West Papua Indonesia: Optimization using Response Surface Methodology (RSM) Agus Prasetya; Halomoan Siagian; Felix Arie Setiawan; Himawan Tri Bayu Murti Petrus
Jurnal Rekayasa Proses Vol 15 No 1 (2021): Volume 15, Number 1, 2021
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.66024

Abstract

Merbau (Intsia bijuga) and matoa (Pometia pinnata J.R. Forster & J.G Forster) are two amongst many prominent biomass sources from West Papua, Indonesia. With their versatile characteristics, merbau and matoa wood are used in many industries such as furniture, music instrument, and many other specialty products. However, wood processing industries can emit up to 60% of the residue. In this study, the usage of both merbau and matoa sawdust wastes as solid fuel was studied using response surface methodology (RSM). merbau and matoa sawdust are sieved to get the desired particle size (-20+50 mesh). Two kinds of the sawdust are then mixed in various compositions (70, 50, and 30% merbau). The mixed sawdust is then mixed with varied sticky starch solutions (1, 5, and 10%) to be formed in pellets with various moulding compression force (50, 100, and 150 kg/cm²). The pellets are then analyzed for its characteristics such as ash, moisture contents, and calorific value to be compared with its initial conditions. A full three-level factorial design under RSM was applied to explain the correlation between independent and dependent variables. The results show that statistically, merbau content, binder content, and compressive force showed relatively significant effects on the studied responses (ash content, moisture content, and calorific value). In addition, ANOVA analysis proved that each variable has significant effects on the responses that are confirmed by practically zero P-value. The coefficient of determinations (R²) are all above 0.96 and the normal probability plots confirm that the proposed models adequate the experimental results.
Co-Authors Adriyanti, Dwi Tyaningsih Adythia, Dicky Marsa Agus Aktawan agus maryono Ahmad Tawfiequrrahman Yuliansyah Ai Siti Patimah Alfiana Adhitasari AM Lelie Novia W Ambar Pertiwiningrum Angge Dhevi Warisaura Anggun Rahmada Anggun Rahmada Ani Anjarwati Anjarwati, Ani Anshori, Shodiq Anton Sujarwo, Anton Aries Kurniawan Arif Rahman Hakim Arifudin Idrus Armaidy Armawi Asih, Yekti Asri, Wuwuh 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 Chandra Wahyu Purnomo Dagus Resmana Djuanda Deden Ependi Dewi, Anggra Lita Sandra Dewi, Anggralita Sandra Dian Hudawan Santoso Dwi Sambada Dwi Saputri Dwi Saputri Edhi Martono Edia Rahayuningsih Erlambang, Erlambang Erlina Kurnianingtyas Erna Astuti Fadlilah, Ilma Fadliyah, Nurul Faishal, Faris Amir Fajar Marendra Fajar Marendra Fajar Marendra Fajar Marendra Farid Ma'ruf Felix Arie Setiawan Ferian Anggara Fitri Nur Kayati, Fitri Nur Hakim, Gilang Lukman Halomoan Siagian haries handoyo Hary Sulistyo Haryanto, Imam Hasanah, Nur Hayati Heimbach, Ivano Heri Cahyo Bagus Setiawan Hidayatunnisa, Nurul Fadhlya Himawan T. B. M. Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Hotden Manurung I Made Bendiyasa I Made Bendiyasa I Wayan Warmada Iga Maliga Ilham Ilham Ilma Fadlilah Ilma Fatimah Yusuf Iman Haryanto Indah Noor Dwi Kusuma Dewi Indra Perdana Indra Perdana Indra Perdana Juli Muwarni, Juli Kevin Cleary Wanta Kirana Dipta Rakhmasari Kisnanto, Indro Kristanto, Jonas Krister Ström Latukismo, Tatag Herbayu Lukman Subekti Mahfudl Sidiq Muhayyat Marendra, Fajar Maria Ratih Puspita Liestiono Marjan Bato Martha Helsanggi Maulana Gilar Nugraha Milawati Milawati Mochamad Syamsiro Mudjijana Mudjijana - Muh. Wahyu Syabani Muhammad A. A. Ramadhan, Muhammad Muhammad Arman Muhammad Hidayat Furqon Muhammad Sholeh MUHAMMAD SHOLEH Muhammad Sigit Cahyono Muhammad Sulaiman mulhidin, mulhidin Muqorobin, Muqorobin Mustakim, Zainal Mustika, Pra Cipta Buana Wahyu Natalia, Priskila Novie Putri Setianingrum Novie Putri Setianingrum Nuzulul Fatimah Oktaviani Nisa Hanafiah Panut Mulyono Prasakti, Laras Puji Astuti Purwantiningsih, Ary Purwanto, Abdul Fattah Bima Radwinda Kurnia Putri Rahmawati, Merza Rikhanatul Firdausy Puspitasari Rikhanatul Firdausy Puspitasari Rima Dewi Anggraeni Rizka Lestari Rizki Laksono, Rizki Rochim B. Cahyono Rochmadi Rochmadi Rochmadi Ruslim Budianto Salafudin Salafudin, Salafudin Saputri, Dwi Sarah Nabila Salma Sartika, Heni Wahyu Sarto Sarto Sarto Sarto Sarto Sarto Sarto Sarto Satria, Arysca Wisnu Satryo Dewanto Suryohendrasworo Sembada, Pratama Tirza Surya Setiawan, Heri Cahyo Agus Sholihatunnisa, Hanifa Afifia Sholikhati, Amalia Putri Sigit Heru Murti Sihana - Sihana - Siswanto, Romi Siti Helmyati Siti Nurul Aisyiyah Jenie, Siti Nurul Aisyiyah Siti Syamsiah Slamet Sumardi, Slamet Stenly Recky Bontinge Sudaryatno Sudaryatno Sujoto, Vincent Sutresno Hadi Sulistiyono Sulistiyono Suparti Suparti Suparti Supranto - Supranto Supranto Supriyatna, Yayat Iman Surami, Wuwuh Asrining Suryanaga, Edward Chandra Sutijan Suyanti Suyanti Tapiory, Jesica Teguh Ariyanto Teguh Ariyanto Timotius, Daniel Titik Indrawati Tri Winarni Soenarto Putri Ula, Rahmah Arfiyah Ulan Paluti Agustina Ummah, Maslacatul Wahyu Wilopo Warmita, Helena Karunia Wibowo, Decka Pynka Widi Astuti Widi Astuti Widodo - Widya Rosita Winarni, Marti Winoto, Gilbert Yogihaz, Billy Dion Yuni Kusumastuti, Yuni Zaizamshimi Nurul Farah Dyana