ABSTRAKPengeringan gabah dapat dilakukan menggunakan alat pengering energi surya, energi biomassa dan energi kombinasi surya dan biomassa. Penelitian ini bertujuan untuk menguji kinerja alat pengering gabah hybrid energi surya dan biomassa jerami padi dan sabut kelapa. Metode yang digunakan dalam penelitian ini adalah metode eksperimental dan deskriptif. Hasil penelitian menunjukkan bahwa pengeringan gabah dengan energi surya menghasilkan suhu ruang pengering rata-rata 40,42 °C, kelembaban relatif ruang pengering rata-rata 41,45%, waktu pengeringan 7 jam, kadar air akhir rata-rata 14,88% bb, laju pengeringan rata-rata 0,64% bk/jam, dan energi pengering 32.595,32 kJ. Pengeringan gabah dengan energi biomassa menghasilkan suhu ruang pengering rata-rata 33,8 °C, kelembaban relatif ruang pengering rata-rata 57%, waktu pengeringan 7 jam, kadar air akhir rata-rata 15,57% bb, laju pengeringan rata-rata 0,50% bk/jam, dan energi pengering 160.662,15 kJ. Pengeringan gabah dengan energi kombinasi surya dan biomassa menghasilkan suhu ruang pengering rata-rata 39,98 °C, kelembaban relatif ruang pengering rata-rata 45,85%, waktu pengeringan 7 jam, kadar air akhir rata-rata 15,33%, laju pengeringan rata-rata 0,55% bk/jam, dan energi pengering 136.457,76 kJ. Kinerja yang diperoleh alat pengering terbaik menggunakan energi surya dengan kadar air akhir sebesar 14,88% bb, laju pengeringan 0,64% bk/jam dan kebutuhan energi pengeringan 32.595,32 kJ. Kata Kunci: Energi biomassa; pengering hybrid; gabah; energi kombinasi; energi surya ABSTRACT Paddy drying was performed using a hybrid drier utilizing solar energy, biomass and combined solar-biomass energy as energy sources. This research objective was to evaluate performance of the hybrid paddy drier using solar energy and paddy straw and coconut coir biomass. The experimental and descriptive method was used. The result showed that the drier with solar system was capable to generate temperature of drying chamber to 40.42 °C in average, while the average relative humidity was 41.45%. The paddys final moisture was 14.88% w.b after 7 hours of drying with drying rate of 0.64 %d.b/h and energy consumption of 32,595.32 kJ. Paddy drying with biomass energy system was capable to obtain drying chambers temperature of 33.8 °C in average, the average relative humidity of 57%, the final moisture of 15.57%, the drying rate of 0.50% d.b/h and energy consumption of 160,662.15 kJ with the same drying times. The solar-biomass drying system was capable to achieve temperature of 39.98 °C, the average relative humidity of 45.85%, the final moisture of 15.33% w.b with drying rate of 0.55% d.b/h and energy consumption of 136,457.76 kJ. Therefore, the best performance for drying paddys was with the solar drying system.
PT. Semen Padang produces several cement types, including PCC, with a total production of up to 6,568,354 tons in 2018. PCC production reached 54% of the total, where the size of 50 kg bag dominates the production with 93%, and the use of papercraft bags as the cement packaging is 78.39%. This research aims to analyze the environmental impacts of the production of 1 ton of PCC 50 kg paper craft bag using the LCA method. The gate-to-gate approach applies as the boundary, ranging from raw mill till packing unit. The impact assessment method uses IMPACT 2002+ to assess the environmental impact of the production. The result shows that the highest environmental impacts are global warming, non-renewable energy, and respiratory inorganics, with the value amounted to 0.10884252 Pt. The process of calcination and coal used in the kiln, packaging transport by diesel-powered trucks, and electricity use is the main contributor to the impact value. In order to improve the PCC production, it is recommended to have an alternative fuel on the kiln unit using rice husks or Mischantus giganteus.
Selain itu, JTEP juga telah terdaftar pada Crossref dan telah memiliki Digital Object Identifier (DOI) dan telah terindeks pada ISJD, IPI, Google Scholar dan DOAJ. JTEP terbit tiga kali setahun yaitu bulan April, Agustus dan Desember, dan mulai tahun ini berisi 15 naskah untuk setiap nomornya. Peningkatan jumlah naskah pada setiap nomornya ini dimaksudkan untuk mengurangi masa tunggu dengan tidak menurunkan kualitas naskah yang dipublikasikan. Jurnal berkala ilmiah ini berkiprah dalam pengembangan ilmu keteknikan untuk pertanian tropika dan lingkungan hayati. Jurnal ini diterbitkan dua kali setahun baik dalam edisi cetak maupun edisi online. Penulis makalah tidak dibatasi pada anggota PERTETA tetapi terbuka bagi masyarakat umum. Lingkup makalah, antara lain meliputi teknik sumberdaya lahan dan air, alat dan mesin budidaya pertanian, lingkungan dan bangunan pertanian, energi alternatif dan elektrifikasi, ergonomika dan elektronika pertanian, teknik pengolahan pangan dan hasil pertanian, manajemen dan sistem informasi pertanian. Makalah dikelompokkan dalam invited paper yang menyajikan isu aktual nasional dan internasional, review perkembangan penelitian, atau penerapan ilmu dan teknologi, technical paper hasil penelitian, penerapan, atau diseminasi, serta research methodology berkaitan pengembangan modul, metode, prosedur, program aplikasi, dan lain sebagainya. Penulisan naskah harus mengikuti panduan penulisan seperti tercantum pada website dan naskah dikirim secara elektronik (online submission) melalui http://journal.ipb.ac.id/index.php/jtep.
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