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Wihdatus Syarifah
Universitas Semarang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Materials Science & Nanotechnology Physics

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Production of Brikueda (Briquettes from Teak Sawdusts and Durian Rind/Durio zibethinus) as Renewable Fuels Wihdatus Syarifah; Sulhadi Sulhadi; Teguh Darsono
Journal of Natural Sciences and Mathematics Research Vol 5, No 1 (2019): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (231.436 KB) | DOI: 10.21580/jnsmr.2019.5.1.11025

Abstract

Jepara is a carving city. The result of carving produces sawdust waste which is usually used to be sold and burned. In addition, durian fruit is available that has a distinctive taste and made an icon of one village in Jepara. The fruit is the belle of the whole community to be eaten by meat and made food. But the skin has the traits and characters that are difficult to decompose. Then the two wastes will be combined with tapioca flour into briquettes as an alternative fuel. This research take four stage: combustion, filtering, printing, and drying. Obtained two treatment, the first treatment is using ratio wood sawdust and durian rind; 50 gr: 50 gr; 25 gr: 50 gr; 50 gr: 25 gr. The results shown it does not ignite up and very hard. The second treatment is using same ratio but added 25 gram starch, the results shown it ignite. This is due to the starch content is used, it ignite the longest with a concentration ratio of 50 gr: 50 gr because its combination increases the calories value. In durian rind there are 3786 cal/g and teak wood consists mainly of cellulose (40-50%), hemicellulose (20-30%), lignin (20-30%), and the calories value of sawdust briquettes is 4714-5519 kcal/kg.©2019 JNSMR UIN Walisongo. All rights reserved.
Analisis Anomali Bouguer Data Gaya Berat Studi Kasus di Kota Lama Semarang Yeni Rima Liana; Tri Maria Magdalena Wea; Wihdatus Syarifah; Supriyadi Supriyadi; Khumaedi Khumaedi
JRST (Jurnal Riset Sains dan Teknologi) Volume 4 N0. 2 September 2020: JRST
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1005.669 KB) | DOI: 10.30595/jrst.v4i2.6301

Abstract

Kota Lama Semarang merupakan salah satu obyek wisata sejarah yang berada di kota Semarang dan pada tahun 2016 masuk sebagai salah satu nominasi World Heritage Site. Penelitian ini bertujuan untuk melakukan analisis anomali Bouguer data gaya berat studi kasus di Kawasan Kota Lama Semarang untuk membantu mengidentifikasi struktur bawah permukaan tanah di Kawasan tersebut yang setiap tahunnya selalu terjadi banjir rob, genangan air dan penurunan permukaan tanah. Pengolahan data anomali Bouger menggunakan software Oasis Montaj 6.4.2. Tahap awal dilakukan koreksi pasang surut (TC) dan koreksi apungan (DC). Tahap berikutnya dilakukan koreksi lanjut yang terdiri dari koreksi udara  bebas (FAC) dan koreksi Bouguer (BC) hingga didapat kontur anomali udara bebas (FAA) dan kontur anomali Bouguer (BA). Nilai BA di Kawasan Kota Lama Semarang dengan interval 10,58 mGal s.d 11,65 mGal dengan koreksi FAC mempunyai rentang 1,48 mGal s.d 3,09 mGal, anomali FAA mempunyai rentang 11,1 mGal s.d 12,7 mGal serta koreksi gobs mempunyai rentang 978118,88 mGal s.d 978118,50 mGal. Kawasan dengan anomali Bouguer tinggi memiliki struktur batuan dengan densitas yang tinggi dibandingkan  dengan Kawasan lainnya. Nilai anomali Bouguer semakin ke utara semakin rendah, dan semakin ke selatan semakin tinggi.
Co-Authors Khumaedi Khumaedi S Sulhadi Supriyadi Supriyadi Teguh Darsono Tri Maria Magdalena Wea Yeni Rima Liana