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All Journal Seminar Nasional Teknik Kimia Kejuangan Indonesian Sugar Research Journal
Risvan Kuswurjanto
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Engineering Environmental Science

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Uji Evektivitas Larutan Pembersih Kerak Falling Film Plate Evaporator di Pabrik Gula Sulfitasi Risvan Kuswurjanto
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In an effort to improve energy efficiency of the evaporator station, Falling Film Plate Evaporator (FFPE)can be used as solution. Though it indicated an improved performance of evaporator station there has been aserious problems of hard scales formation. Chemical cleaning with commercial formula wasn’t effectiveenough to remove scale at normal operation period. As interim effort the problems is approach by shorteningoperation cycle of FFPE to 8-10 days to prevent thicker scale formation. Therefore research is needed tolook for an effectives and friendly formula for FFPE scales cleaning. The preliminary results showedthat FFPE scale with working cycle of 8-10 days was thin, less than 1 mm thickness and weight of 2.89mg/cm2. The scale has a soft texture, a bit fragile and blackist brown colour. The KA and KB (Kom - 2)combination was more effective than single one (Kom - 1). The factory trial shows that the performanceof FFPE was better after cleaning than before. After acid cleaning and washing the bottom of plate pack wascleaner.
Prediksi Unsur Hara Sampel Tanah Menggunakan Near Infrared Spectroscopy Opal Priya Wening; Risvan Kuswurjanto
Indonesian Sugar Research Journal Vol 3, No 1 (2023): Indonesian Sugar Research Journal
Publisher : Pusat Penelitian Perkebunan Gula Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54256/isrj.v3i1.88

Abstract

Penentuan karakteristik dan konsentrasi unsur hara tanah perlu dilakukan metode analisa untuk perlakuan lahan serta ketepatan dosis dan jenis pemupukan dalam optimalisasi produktivitas tanaman. Metode alternatif analisis kandungan sampel secara cepat, efektif, ramah lingkungan, dan tidak merusak sampel dapat menggunakan near infrared spectroscopy (NIRS). Sampel yang digunakan berasal dari Laboratorium Tanah, P3GI. Parameter yang digunakan sebagai perkiraan kandungan yaitu pH, nitrogen (N, %), fosfat (P2O5, ppm), dan kalium (K2O, ppm). Sebanyak 64 sampel tanah digunakan untuk kalibrasi dan 30% untuk validasi. Spektrum NIRS diperoleh dari FOSS XDS rapid content analysis (400 – 2.400 nm, reflectance mode) dan pengolahan data statistik menggunakan vision software dengan model yang dibangun berdasarkan partial least square (PLS). Penelitian ini didapatkan hasil evaluasi bahwa model yang dibangun untuk memprediksi parameter pH (R2 = 0,951; r2 = 0,511; SEP = 1,428; RPD = 1,440; consistency = 22,321%; dan  = 0,1776) dan nitrogen R2 = 0,767; r2 = 0,665; SEP = 0,025; RPD = 1,749; consistency = 97,745%; dan  = 0,0131) performanya masih cukup baik, sedangkan lainnya masih kurang. Berdasarkan hasil evaluasi tersebut, NIRS memiliki potensi sebagai metode analisa kualitas tanah namun model yang dibangun masih perlu ditingkatkan keakuratanya.
Co-Authors Opal Priya Wening