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All Journal Jurnal Teknik Kimia USU Al-Risalah : Jurnal Imu Syariah dan Hukum Jurnal Berita Sosial Journal of Sylva Indonesiana Jurnal Speed (Sport, Physical Education, Empowerment) Jurnal JTIK (Jurnal Teknologi Informasi dan Komunikasi) UNES Journal of Swara Justisia PROFICIO: Jurnal Pengabdian Masyarakat Journal Physical Health Recreation (JPHR) Jurnal Citra Pendidikan Teknika STTKD: : Jurnal Teknik, Elektronik, Engine Indonesian Journal of Research and Educational Review (IJRER) Jurnal Teknik Kimia USU Jurnal Citra Pendidikan Anak Indonesian Journal of Physical Activity Konsumen & Konsumsi: Jurnal Manajemen (KKJM) LITERA ABDI: Jurnal Pengabdian Masyarakat Jurnal Kecerdasan Buatan dan Teknologi Informasi Mammiri: Jurnal Pengabdian Masyarakat JIS
Irvan
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Stabilitas Digester Anaerobik Satu Tahap dalam Produksi Biogas pada Variasi Temperatur Menggunakan Reaktor Batch Trisakti, Bambang; Irvan; Sitompul, Desi Berliana
Jurnal Teknik Kimia USU Vol. 10 No. 1 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (294.923 KB) | DOI: 10.32734/jtk.v10i1.3271

Abstract

Anaerobic digestion is the decomposition of organic matter by microbes into methane, carbon dioxide, and hydrogen sulfide in the absence of oxygen. This study aimed to obtain the stability of the one stage anaerobic digester in biogas production that was seen through pH and alkalinity parameters. The process was carried out by varying the temperature, which is 35 °C, 45 °C, and 55 °C with pH maintained 7 (± 0.2). Analysis of pH and alkalinity was carried out to assess the stability of reactor using samples taken from the reactor overflow. The pH profile produced was relatively stable with a pH range between 6.8 - 7.3. The resulting alkalinity is relatively stable with aalkalinity range between 3.500 – 4.500 mg/L. The volume of biogas produced at 35 °C, 45 °C, and 55 °C respectively are 2065 mL, 3830 mL, and 4570 mL with the highest concentrations of methane (CH4), Carbon dioxide (CO2) and trace Hydrogen Sulfide (H2S) at a temperature of 55 oC obtained the value of the composition of methane, carbon dioxide, and hydrogen sulfide each at 89,000 %, 11,000 %, and 0,011 %.
Pengaruh Laju Pengadukan Terhadap Stabilitas Digester Anaerobik Satu Tahap pada Pembentukan Biogas dari Limbah Cair Pabrik Kelapa Sawit Menggunakan Lab Scale Reaktor Batch Irvan; Trisakti, Bambang; Azka, Nawalul
Jurnal Teknik Kimia USU Vol. 9 No. 1 (2020): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (387.134 KB) | DOI: 10.32734/jtk.v9i1.3294

Abstract

Mixing is essential to increase the efficiency of interactions between active microbes and organic matter during the anaerobic digestion process. The purpose of this research is to study the effect of mixing rate on the stability of one stage anaerobic digesters in biogas production in terms of pH and alkalinity. The production of biogas from palm oil mill effluent was carried out in a 6000 ml batch reactor at varying mixing rates: 100 rpm, 150 rpm, 200 rpm, 250 rpm, and 300 rpm. The reactor is operated with a mixture condition maintained at a pH of 7 ± 0.2 and an operating temperature of 55 ° C. NaHCO3 is added to the mixture to control and maintain the pH of the mixture. Analysis of pH and alkalinity is carried out every day to see the reactor stability. The best results were obtained at a mixing rate of 200 rpm with the pH produced stable during the process is 7. The alkalinity profile produced at each mixing rate was relatively stable with an alkalinity range is 3500-4500 mg/L. The best mixing rate is 200 rpm with a stable pH and alkalinity and the highest biogas production is 457 ml/day.
Pemanfaatan Tandan Pisang Kepok sebagai Sumber Alkali pada Pembuatan Sabun Cair Amelia, Reny Elvira; Hasibuan, Rosdanelli; Irvan
Jurnal Teknik Kimia USU Vol. 12 No. 1 (2023): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v12i1.5383

Abstract

Kepok banana bunches were used as a source of natural alkali in the study of determining the ratio of coconut oil and palm oil in the saponification process using banana bunch ash. Alkali is obtained from the calcination process with variations in temperature of 400 °C, 500 °C, 600 °C, and 700 °C for 4 hours. Characterization of potassium from Kepok banana bunch ash using Atomic Absorption Spectrophotometer resulted in the highest potassium being 58.41% at 600 °C. The potassium obtained is used as a source of alkali in the saponification process of liquid bath soap. In this study, variations in the amount of alkali (30%, 40%, 50%, and 60%), the ratio of coconut oil and palm oil (60:40, 70:30, 80:20, and 90:10 (w/w)) with reaction times were carried out 2.5 hours, 3 hours, and 3.5 hours. The best liquid bath soap was obtained at a ratio of 70:30 (w/w) coconut oil and palm oil and 30% alkali with a reaction time of 2.5 hours which was 81.34%.
Pengaruh Laju Alir Biogas dan Ukuran Partikel Pembentuk Pelet terhadap Penyisihan Karbon Dioksida (CO2) dalam Biogas dengan Proses Adsorpsi - Desorpsi Menggunakan Adsorben Berbasis Zeolit Alam untuk Peningkatan Kualitas Biogas Sidabutar, Rivaldi; Trisakti, Bambang; Irvan
Jurnal Teknik Kimia USU Vol. 12 No. 1 (2023): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v12i1.10134

Abstract

Adsorption is the process of fluid molecules contacting the surface of a solid material. This study aims to remove carbon dioxide (CO2) gas in biogas using natural zeolite-based adsorbent pellets by adsorption and desorption of CO2 from the adsorbent using air. CO2 removal was carried out to determine the percentage of CO2 removal efficiency with variations in biogas flow rates (100 mL/minute, 300 mL/minute, and 500 mL/minute) and variations in the type of adsorbent pellets (particle size, activation time, calcination time, and dealumination activation treatment). Determination of the percentage of CO2 removal is carried out by flowing the biogas into the column and contacting it with the adsorbent continuously for 30 minutes and the output gas is collected in a gas collector to analyze the remaining CO2 content. The results showed that the best CO2 removal was 97.7% using an adsorbent with a particle size of 140 mesh, 4 hours of calcination, 90 minutes of activation time, and dealumination activation at a flow rate of 100 mL/minute. The breakthrough characteristic curve presents the characteristic “S” profile at constant flow rate (100 mL/minute).
Pengurangan Nilai COD pada Effluent Fermentor Biogas UASB-HCPB dengan Memanfaatkan Mikroalga Chlorella vulgaris Sidabutar, Rivaldi; Trisakti, Bambang; Irvan; Bani, Okta; Nasution, Juan Akmal
Jurnal Teknik Kimia USU Vol. 13 No. 2 (2024): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v13i2.16161

Abstract

Palm oil mill effluent (POME) is the main waste generated from the palm oil industry. LCPKS has a COD level of 57,000-60,400 mg/L. High levels of COD can harm the environment. LCPKS treatment techniques generally use a combination of anaerobic and aerobic waste treatment methods. The anaerobic process has been conducted using a UASB-HCPB reactor. But, the COD levels of anaerobic results have not reached the quality standards so that further processing is needed. Microalgae have the potential to reduce contaminant levels in wastewater. Chlorella vulgaris microalgae is a microalgae that is widely used in wastewater treatment. This study utilized Chorella vulgaris in reducing the COD levels of the effluent of the UASB-HCPB biogas fermentor with variations in lighting intensity and variations in the ratio of effluent to microalgae. It was found that the lighting intensity of light:dark (24:0) hours provided optimal microalgae growth so as to provide the best COD reduction with a COD reduction efficiency of 87.5%. The ratio of microalgae to effluent of 1000 mL: 500 mL showed the best COD reduction with an efficiency of 93.75%.
Studi Literatur : Peranan Aktivitas Fisik Terhadap Peningkatan Kemampuan Otak dan Aspek Kognitif Syafruddin, Muhammad Akbar; Irvan; Hasanuddin, M. Imran
Jurnal Speed (Sport, Physical Education, Empowerment) Vol 6 No 2 (2023): Jurnal Speed (Sport, Physical Education, and Empowerment)
Publisher : Universitas Singaperbangsa Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/jurnalspeed.v6i2.9710

Abstract

The purpose of writing this article is to explore further the role of physical activity in improving brain function and cognitive aspects and to provide a detailed description of a neuroscientific perspective on how physical activity can contribute to cognitive function in particular. The method used in writing this article is a literature study approach. The sources of information in this article come from various articles on Google Scholar, Elsevier, and Researchgate, using the keywords physical education, physical activity, cognitive aspects, and brain abilities. The articles used as sources of information in this study are articles published between 2013 and 2023. The conclusion from this literature study is that involvement in various physical activities in everyday life can help humans improve brain performance abilities and also encourage improvements cognitive aspect. Keywords: Physical Education, Physical Activity, Increasing Brain ability, Cognitive
Peran Orang Tua Terhadap Pembinaan Anak Bermasalah di Kelurahan Maricayakota Makassar Irvan; Sakaruddin Mandjarreki
Jurnal Berita Sosial Vol 7 No 1 (2022)
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/beritasosial.v7i1.45037

Abstract

The role of parents in fostering children is very important in building a sakinah household. The type of research used is descriptive qualitative research. The approach used is a social welfare approach and a sociological approach. Sources of data in this study are parents, children and village officials. The method used in data collection is the method of observation, interviews and documentation. The research instruments used were interview guides, cameras, recording devices, and notebooks. Data processing techniques from all sources obtained. The data analysis technique used is qualitative analysis which is a continuous and repeated effort, the data obtained in the field is processed with the intention of providing information. The results showed that, the efforts made by parents in fostering problem children in Maricaya Baru Village, Makassar District were carried out by giving children a supportive environment at home, giving children enthusiasm in living life, discussing children's problems together, supervising children's activities, balancing attitudes when advise children. The causes of problem children in Maricaya Baru Village from internal factors are biological factors, psychological factors, economic factors, while external factors are educational factors, social factors, lack of communication factors, lack of supervision and environmental factors.
Seedling Growth Evaluation of Rehabilitated Mangrove and Carbon Estimation of Two Types of Mangroves in Perlis, Langkat, North Sumatra Ahmad Hisyam Pulungan; Basyuni, M; Rizka Amelia; Irvan; Astrid Fauzia Dewinta; Julia Syahriani Hasibuan; Itchika Sivaipram
Journal of Sylva Indonesiana Vol. 7 No. 02 (2024): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsi.v7i02.13463

Abstract

Perlis Village is around the mangrove forest in Langkat Regency, North Sumatra, Indonesia. This village has several barren lands potentially planted with mangroves. They were considering that the livelihoods of most of the people were fishermen and mangrove crab catchers. It is necessary to plant and rehabilitate damaged mangrove forests to restore and repair the ecosystem in Perlis Village. Planting activities were carried out in locations considered suitable for planting 200 seedlings. Three transects were made to obtain vegetation analysis data and carbon content. Each transect consists of six plots in natural forest and restoration forest. When the seedlings at the planting location were 3 months old, observations were carried out again, and of the 135 plants, approximately 67.16 percent were still alive from a total of 200 seedlings planted. Carbon storage in natural forests is 69 Mg ha-1 and 41.64 Mg ha-1 in restoration forests. By enriching the methods and estimating the potential carbon stocks of natural and rehabilitated mangroves in Perlis village in the context of Indonesia's climate change mitigation strategy, it is hoped that this information has the potential to help the blue carbon research community and policymakers
PKM PELATIHAN OLAHRAGA PICKLEBALL PADA GURU OLAHRAGA DI KABUPATEN SENGKANG Irvan; Akbar Syafruddin, Muhammad; Agus Sutriawan; M. Imran Hasanuddin; Andi Sahrul Jahrir
PROFICIO Vol. 5 No. 1 (2024): PROFICIO: Jurnal Abdimas FKIP UTP
Publisher : FKIP UNIVERSITAS TUNAS PEMBANGUNAN SURAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jpf.v5i1.2922

Abstract

Tujuan kegiatan Pengabdian Kepada Masyarakat (PKM) untuk memperkenalkan atau melakukan Pelatihan terkait pemahaman/pengenalan cabang olahraga pickleball pada guru Pendidikan Jasmani, Olahraga dan Kesehatan (PJOK) di Kabupaten Sengkang. Metode yang digunakan dalam kegiatan ini dengan melakukan pelatihan pickleball. Hasil dari sosialisasi ini memberi motivasi kepada guru-guru untuk turut serta mengambil bagian dari olahraga pickleball selain menjadi atlet olahraga pickleball dapat meningkatkan kebugaran jasmani. Dengan organisasi yang sudah berjalan, oleh karena itu sosialisasi giat dilakukan diharapkan olahraga pickleball menjadi olahraga yang populer di kalangan masyarakat. Dengan adanya pelatihan ini dapat menyebarluaskan olahraga pickleball di semua lapisan masyarakat selain dapat menjaring minat siswa disekolah untuk menjadi atlet berprestasi dalam cabang olahraga pickleball
ANALYSIS OF CORRECTIVE MAINTENANCE MEASURES OSCILLATOR MODULE GLIDE PATH NORMARC EQUIPMENT AT PERUM LPPNPI CABANG SURABAYA Musthofa, Luthfi; Toni; Irvan
Teknika STTKD: : Jurnal Teknik, Elektronik, Engine Vol 10 No 2 (2024): TEKNIKA STTKD: JURNAL TEKNIK, ELEKTRONIK, ENGINE
Publisher : Sekolah Tinggi Teknologi Kedirgantaraan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56521/teknika.v10i2.1101

Abstract

One of the navigation equipment used to support aviation safety is the Instrument Landing System (ILS). ILS is an important landing aid to improve aviation safety. ILS uses a Localizer to provide horizontal guidance to pilots at a distance of 25 nautical miles from the runway. Then, the glide path equipment will provide vertical guidance to pilots at a distance of 10 nautical miles from the runway. In glide path equipment, there are various modules used, one of which is the oscillator module which functions as a frequency generator. This study aims to identify the cause of the fail alarm on the Remote Monitoring Management (RMM) indicator of glide path equipment caused by damage to the oscillator module. This research uses a qualitative descriptive research method which emphasizes understanding problems based on natural reality namely primary and secondary data. Through this research, the cause of oscillator module damage was found to be caused by a 10,000 microfarad elco type capacitor component that burned due to over voltage on the oscillator module.
Co-Authors A. Febi Irawati Agus Sutriawan Ahmad Hisyam Pulungan ahmad yani Alamsyah, Nur Fadly Ali Mulyanto Amelia, Reny Elvira Amiruddin Andi Sahrul Jahrir Andryawan Angellice Astrid Fauzia Dewinta Awaluddin Azka, Nawalul Baehaki, Ahmad Bambang Trisakti Bani, Okta Barus, Arif Kurniawan Basyuni, M Butsiarah Dalimunthe, Yulia Agustina Dana Sembiring, Surya Firmansyah, Alif Hudain, Muh. Adnan Ichsania, Nurul Irwin Itchika Sivaipram Jahri, Andi Sahrul Jahrir, Andi Sahrul Julia Syahriani Hasibuan M Imran Hasanuddin Muhammad Akbar Syafruddin Muhammad Ivan Miftahul Aziz Musthofa, Luthfi Nasution, Juan Akmal Novita Sari Sihombing, Dewi Nurussyariah Panjaitan, Budi Sastra Rizka Amelia Rosdanelli Hasibuan Sakaruddin Mandjarreki Sidabutar, Rivaldi Sitompul, Desi Berliana Sufitriyono Sufitriyono, Sufitriyono Susi Delmiati Suwardi Toni WIDIANTO Wulandari, Ririn Mamiek Yani, Ahmad Zakaria, M. Rifqy Zakaria, Rifqy