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All Journal Journal Of Chemical Process Engineering (JCPE) Dewantara Journal of Technology Journal Of Sustainable Research In Management Of Agroindustry (SURIMI)
Rizka Octavia
Universitas Teknologi Sulawesi
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering

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Uji Proximate Tepung Jagung dari Limbah Tongkol Jagung Pulut secara Fermentasi Mirnawati Mirnawati; Rizka Octavia
Journal of Sustainable Research In Management of Agroindustry (SURIMI) Vol. 1 No. 1 (2021): SURIMI : April 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (31.11 KB) | DOI: 10.35970/surimi.v1i1.528

Abstract

Waxy corn is widely developed in several areas in South Sulawesi. From year to year the productivity of pulut corn has increased, this also shows that agricultural waste production has also increased. The agricultural waste produced by corn is cobs. The purpose of this study was to determine the processing of pulut corn cobs into corn flour and to determine the characterization of the quality of corn flour, especially the proximate test based on SNI standards. The research method is the gravimetric method, the results of the corn flour test show that the proximate content (moisture content, ash content, and protein content) with successive values of 0.07%, 17.49%, 1.9 x 106 has met the standard standards. Indonesian National (SNI) (SNI 01-3751-2009), except for moisture content with a value of 14.32% which indicates that corn flour has a short shelf life. Waxy corn is widely developed in several areas in South Sulawesi. Pulut corn contains 100% amylopectin which provides a sweet, fluffier taste and good texture.
Pembuatan Flakes Dari Pangan Tepung Beras Merah (Oriza Niavara) Dengan Penambahan Labu Kuning (Cucurbita Moschata Durch Rizka Octavia; Alfiah Indriastuti; Satriani Napang
Journal of Chemical Process Engineering Vol 8, No 1 (2023)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jcpe.v8i1.1371

Abstract

Flakes is a high starch-based product that can increase brown rice consumption. The main raw material that is often used in flakes that are widely circulated in the market is wheat or corn kernels. The raw material is usually processed as a whole or floured first. The flakes that I want to make are flakes products that are good nutritionally and have a sweet and savory taste so they can be consumed directly or with the addition of milk. This study aims to determine the percentage of water content, fiber content, fat content and carbohydrate content with reference to SNI Quality Requirements for Extrudate Snacks according to SNI 01-2886-2000. Then proximate testing was carried out which included testing for water content, fiber content, fat content and carbohydrate content and organoleptic testing which included testing color and taste.
Pengaruh Penggunaan Trichloroisocyanuric Acid (TCCA) terhadap Kualitas Air dan Efisiensi Termal Sistem Pendingin PLTU (Studi Kasus di PT Antam Tbk Rizka Octavia; Nurhikmah Wahab; Irawati Ramli; Mariaulfa Mustam
Dewantara Journal of Technology Vol. 6 No. 1 (2025)
Publisher : Akademi Teknologi Industri Dewantara Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59563/djtech.v6i1.307

Abstract

Penelitian ini bertujuan untuk mengevaluasi efektivitas penggunaan trichloroisocyanuric acid (TCCA) sebagai bahan kimia alternatif pengganti sodium hypochlorite (NaOCl) dalam mengendalikan pertumbuhan macrofouling pada sistem pendingin utama PLTU PT ANTAM Tbk UBPN Sulawesi Tenggara. Macrofouling, seperti pertumbuhan kerang dan biofilm, merupakan permasalahan umum pada sistem pendingin berbasis air laut yang dapat menurunkan efisiensi perpindahan panas serta meningkatkan risiko kerusakan peralatan. Pengujian dilakukan selama dua periode terpisah dengan masing-masing penggunaan NaOCl dan TCCA, di mana parameter yang diamati meliputi nilai free residual chlorine (FRC) dan konsumsi harian bahan kimia. Hasil penelitian menunjukkan bahwa penggunaan TCCA menghasilkan nilai FRC yang lebih stabil dalam rentang optimal 0,3–0,5 ppm tanpa fluktuasi ekstrem, sementara NaOCl menunjukkan ketidakstabilan dengan nilai yang sering kali berada di luar batas optimal. Selain itu, TCCA memerlukan dosis lebih rendah dan frekuensi pengisian yang lebih jarang, yang menunjukkan efisiensi operasional yang lebih tinggi dan penurunan risiko paparan bahan kimia terhadap operator. Keunggulan TCCA juga mencakup stabilitas senyawa yang lebih baik, kemudahan dalam penanganan, dan keamanan penyimpanan. Berdasarkan temuan ini, TCCA direkomendasikan sebagai pengganti yang lebih efektif, efisien, dan aman untuk meningkatkan keandalan dan kinerja sistem pendingin PLTU.
Analisa Sampel Komposite dengan Menggunakan XRF Metode Fuse Bead untuk Mengurangi Pemakaian Flux pada Analisa Nikel Ore Irawati Ramli; Nurhikmah Wahab; Rizka Octavia; Alfiah Indriastuti; Riki Kusumah
Dewantara Journal of Technology Vol. 4 No. 2 (2024)
Publisher : Akademi Teknologi Industri Dewantara Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59563/djtech.v4i2.286

Abstract

Composite analysis in a geological or mining context, especially for nickel ore, the theoretical basis refers to the concept of sampling and mineral processing. Composite sampling is carried out to obtain an accurate representation of a mineral deposit. Composite samples involve combining several individual samples to represent the overall properties of a material. The importance of composite data in processing mineral reserve information. Composite samples are used to smooth out fluctuations in mineral content and allow a better estimate of the average value of mineral content in the deposit. The implementation stage of this research consists of a small number of samples from several parts (a, c, d) being mixed into one combined sample, which is then analyzed to produce results that represent the average of all samples, by taking 0.25 grams of each sample to reach a total of 1 gram, then analyze the combined results. And using an X-Ray Fluorescence (XRF) tool with the Fuse Bead method. From the results of the research conducted by the author, a conclusion was obtained that it met the acceptance requirements. The accuracy rate obtained was 99.21%. which has a low error rate of 0.79%. The use of flux in the composite stage is more profitable, in terms of the efficiency of adding flux and the efficiency of working on samples compared to using the usual stage which still uses the process of processing samples one by one with the addition of more flux from the composite stage.
Co-Authors Alfiah Indriastuti Alfiah Indriastuti Irawati Ramli Mirnawati Mirnawati Mustam, Mariaulfa Riki Kusumah Satriani Napang wahab, Nurhikmah