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All Journal Jurnal Teknologi Kimia Unimal PERFECT: Journal of Smart Algorithms
Asyifa, Salwa
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Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science

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STRATEGI BIOPRODUKSI BERKELANJUTAN DARI LIMBAH PERTANIAN: INTEGRASI KONSEP CIRCULAR ECONOMY UNTUK MINIMASI EMISI DAN NILAI TAMBAH TINGGI Asyifa, Salwa
Jurnal Teknologi Kimia Unimal Vol. 14 No. 1 (2025): Jurnal Teknologi Kimia Unimal - May 2025
Publisher : Chemical Engineering Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jtku.v14i1.21667

Abstract

Limbah pertanian lignoselulosa seperti sekam padi, jerami, tandan kosong kelapa sawit (TKKS), dan bagasse tebu berpotensi besar sebagai sumber bahan baku bioenergi dan bioproduk bernilai. Kajian ini membahas strategi bioproduksi berkelanjutan melalui pendekatan circular economy yang mengintegrasikan teknologi pretreatment, konversi biologis, dan termokimia dalam model biorefinery zero-waste. Hasil analisis menunjukkan bahwa kombinasi teknologi seperti Steam Explosion, fermentasi mikroba, pirolisis, dan gasifikasi mampu mengonversi seluruh fraksi biomassa menjadi bioetanol, biohidrogen, biochar, dan bahan kimia terbarukan dengan efisiensi tinggi dan emisi rendah. Life Cycle Assessment (LCA) memperkuat temuan ini dengan menunjukkan pengurangan signifikan dalam jejak karbon dan konsumsi energi. Meskipun terdapat tantangan teknis dan kebijakan, inovasi dalam rekayasa enzimatik serta dukungan regulasi lintas sektor dapat mempercepat penerapan skala industri. Dengan strategi yang tepat, Indonesia berpotensi menjadi pelopor bioekonomi sirkular berbasis limbah pertanian.
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.
Co-Authors Pharmayeni Pharmayeni