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All Journal Jurnas Nasional Teknologi dan Sistem Informasi Journal of Industrial Community Empowerment PERFECT: Journal of Smart Algorithms
Pharmayeni Pharmayeni
Departement Of Analytical Chemistry, Padang Industrial Technology Academy, Padang, 25171, Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science

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Peningkatan Kapasitas Digester Untuk Kecukupan Produksi Biogas Sebagai Bahan Bakar Generator Listrik Rudianto, Rudianto; Zulhamidi, Zulhamidi; Edwar, Ester; Pharmayeni, Pharmayeni; Ekawati, Irna; Putri, Gustiarini Rika
Journal of Industrial Community Empowerment Vol 3, No 1 (2024): Published in April 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v3i1.251

Abstract

The development of dairy farming in Nagari Lasi District Canduang, Agam Regency, West Sumatra Province, has provided the materials a massive source of biogas production. The number of cattle in Nagari Lasi has reached around 1000 heads, plus other livestock such as Buffaloes and Goats. The manufacture of digesters in the previous year's Community service activities was a success. It produces biogas and is used for cheese production and household supply. However, the amount of biogas produced is still tiny. To realize "Community-Independent Energy," power generator installation is necessary. The biogas supply must be in large quantities and available continuously for the generator to operate. Biogas currently produced by the digester is insufficient to produce the biogas required by the generator. Therefore, biogas production capacity needs to be improved by expanding the volume of the digester that will be processing cow dung into biogas. Increasing digester capacity has significantly increased biogas production, reaching 12 m3 per day. This amount is enough to be used as fuel for an electric generator continuously.
Serial Rectifier Antenna (Rectenna) Circular Microstrip Patch 2.4 GHz for RF Energy Harvesting Asyifa, Salwa; Pharmayeni, Pharmayeni
PERFECT: Journal of Smart Algorithms Vol. 2 No. 1 (2025): PERFECT: Journal of Smart Algorithms, Article Research January 2025
Publisher : LEMBAGA KAJIAN PEMBANGUNAN PERTANIAN DAN LINGKUNGAN (LKPPL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/perfect.v2i1.70

Abstract

The rapid development of Radio Frequency (RF) usage at this time causes the abundance and waste of radio frequency (RF) electromagnetic wave energy sources in the air. This RF energy source can be used as an environmentally friendly alternative by harvesting energy using the rectenna system . The rectifier antenna (rectenna) system is designed using the serial rectenna system , this system is used to improve the performance of the rectenna in converting electromagnetic waves into a direct voltage (DC) source. To design a serial rectenna system, use 3 antennas and 3 series of rectifiers . The antenna used in the serial rectenna system is a 2.4 GHz circular microstrip patch antenna for WiFi signal reception. Meanwhile, the rectifier circuit uses a 6-stage voltage doubler using a Schottky 2860 diode and a 1nF smd capacitor. From testing and measuring the serial rectenna system , the circular patch microstrip antenna is able to capture and rectify the voltage to DC. Antenna system has return loss values of -26.29 dB, -21.75 dB, and -28.57dB, VSWR 1.11, 1.16, and 1.07, impedances 51.1, 55.56, and 50.22, bandwidth 60 MHz, 60 MHz and 50 MHz with resonant frequency 2.42 GHz, 2.36 GHz and 2.48 GHz. So that the voltage generated by a single rectenna system is 51.3 mV at a distance of 25 cm. Meanwhile, the rectenna serial system can convert direct voltage of 151.3 mV at a distance of 25 cm from the source of the Access Point transmitter.
Peningkatan Kapasitas Digester Untuk Kecukupan Produksi Biogas Sebagai Bahan Bakar Generator Listrik Rudianto, Rudianto; Zulhamidi, Zulhamidi; Edwar, Ester; Pharmayeni, Pharmayeni; Ekawati, Irna; Putri , Gustiarini Rika
Journal of Industrial Community Empowerment Vol. 3 No. 1 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v3i1.251

Abstract

The development of dairy farming in Nagari Lasi District Canduang, Agam Regency, West Sumatra Province, has provided the materials a massive source of biogas production. The number of cattle in Nagari Lasi has reached around 1000 heads, plus other livestock such as Buffaloes and Goats. The manufacture of digesters in the previous year's Community service activities was a success. It produces biogas and is used for cheese production and household supply. However, the amount of biogas produced is still tiny. To realize "Community-Independent Energy," power generator installation is necessary. The biogas supply must be in large quantities and available continuously for the generator to operate. Biogas currently produced by the digester is insufficient to produce the biogas required by the generator. Therefore, biogas production capacity needs to be improved by expanding the volume of the digester that will be processing cow dung into biogas. Increasing digester capacity has significantly increased biogas production, reaching 12 m3 per day. This amount is enough to be used as fuel for an electric generator continuously.
Evaluasi Implementasi Modul SAP Material Management (MM) Untuk Pengadaan Material Menggunakan Process Mining Alfi, Rizki; Ramadian, Demi; Pharmayeni, Pharmayeni; Sardani, Rizaldi
Jurnal Nasional Teknologi dan Sistem Informasi Vol 8 No 3 (2022): Desember 2022
Publisher : Departemen Sistem Informasi, Fakultas Teknologi Informasi, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/TEKNOSI.v8i3.2022.115-122

Abstract

Pengadaan material memegang peran penting dalam terselenggaranya proses bisnis di perusahaan. Proses pengadaan material yang perusahaan lakukan biasanya ditunjang dengan fasilitas sistem informasi terintegrasi ERP seperti SAP. Khusus untuk proses procurement perusahaan menggunakan e-procurement dan SAP Material Management modul. Adanya durasi lead time yang cukup lama mengenai sampainya dari beberapa material tertentu yang dibutuhkan pabrik pada proses pengadaannya. Karena itu perlu dilakukan evaluasi terhadap proses pengadaan material pada implementasi SAP ERP yang sudah ada. Evaluasi akan dilakukan dengan pendekatan kuantitatif. Gambaran tentang bagaimana proses pengadaan material dilakukan setelah penerapan SAP diukur performance-nya dari frekuensi case dan durasi lead time. Selanjutnya ditentukan atribut data pada event log apa saja yang dibutuhkan pada penelitian dan dilanjutkan dengan ekstraksi event log. Event log kemudian akan diolah dengan tools process mining tertentu. Keluaran dari proses ini adalah model proses bisnis pengadaan yang sesungguhnya dijalankan dan terekam pada modul SAP MM. Dari hasil process mining, tidak ditemukan ketidaksesuain dan kesenjangan mayor pada proses berdasarkan prosedural pengadaan yang ditetapkan. Namun, dapat ditemukan waktu tunggu yang lama setelah create PR Doc menuju RFQ Date, rata-rata waktu mencapai 173 hari hingga PO delivery. Selain itu, ditemukan terdapat sedikit bottleneck pada waktu tertentu dimana adanya aktifitas dan case sangat banyak yang perlu ditangani oleh para user.  Penelitian ini memberikan analisa sebab akibat penyebab permasalahan tersebut baik dari hasil process mining dan kuesioner yang didapat. Perusahaan sebaiknya membuat kebijakan target waktu pengadaan dan menetapkan prosedur RFQ, pemilihan vendor yang lebih efektif sehingga dapat mempersingkat waktu proses pengadaan ini.
Instalasi Digester dan Pelatihan Pembuatan Biogas dari Kotoran Sapi Untuk Bahan Bakar Industri dan Rumah Tangga Rudianto, Rudianto; Zulhamidi, Zulhamidi; Pharmayeni, Pharmayeni; Ekawati, Irna; Putri, Gustiarini Rika
Journal of Industrial Community Empowerment Vol. 1 No. 2 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v1i2.146

Abstract

Renewable energy has become much discussed issue today. One form of renewable energy that has not been managed optimally is biogas. Biogas can be produced from cow dung as a livestock waste. Currently the number of cattle in Nagari Lasi has reached around 1000 heads, large quantities for the biogas raw materials produced. The lecturers of the Department of Agro-Industrial Engineering of Polytechnic ATI Padang and CV. Kejulasi build a digester which is a device that produce biogas from cow dung. This biogas can be used as a fuel. The by-product of this process is compost that can be used for agriculture. 50 liters of cow dung, can produces biogas which can fully fill a 500 liters capacity package in three hours. And that amount of gas can be used for burning in the stove for two hours continuously that able to boil three liters water in about ten minutes.
Co-Authors Alfi, Rizki Asyifa, Salwa Demi Ramadian, Demi Edwar, Ester Ekawati, Irna Gustiarini Rika Putri Irna Ekawati Putri , Gustiarini Rika Rudianto Rudianto Sardani, Rizaldi ZULHAMIDI, ZULHAMIDI