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Sri Hastutiningrum
Institut Sains & Teknologi AKPRIND Yogyakarta
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Journal : JURNAL TEKNOLOGI TECHNOSCIENTIA

 1 
PROSES PEMBUATAN BATU BATA BERPORI DARI TANAH LIAT DAN KACA Hastutiningrum, Sri
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 5 No 2 Februari 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v5i2.549

Abstract

Brick is one of the ingredients of making buildings that currently needs increased mainly due to the porous bricks are stronger and lighter than ordinary bricks, making it great for the foundation of the building. Making bricks porous can use material stuffing form of foam, paper, a rice husk and organic materials. In this research are tried making bricks porous by the use of stuffing form of paper, where these materials are so easily we get. Raw materials used for the manufacture of a porous bricks is glass, clay and water. The purpose of this study was to determine the influence of glass to powerful press of porous brick. Generally, making of porous brick is mixing by powder paper, clay, glass and a little water and then made of dough. Printed and dried dough until weighs constant, then burned in muffle with temperature and time that given. Bricks which has been so then tested strong complained bitterly. The variables used are variable of ratio of clay and glass 1: 1, 1: 1,5, 1: 2, 1: 2.5, and 1: 3, variable of burning time 60 minutes, 90 minutes, 120 minutes, 150 minutes, and 180 minutes and variable of burning temperature 600 oC, 650 oC, 700 oC, 750 oC, and 800 oC. Based on the results of the research that has been done, press optimum strength obtained is 35,26 kg/cm2 with clay and glass ratio 1: 2, while the combustion time 60 minutes, gained strong press optimum of 35,26 kg/cm2 and burning temperatures 700 oC obtained strong press optimum of 36,58 kg/cm2.
UJI KEMAMPUAN NaOH UNTUK RECOVERY KROMIUM(III) DARI LIMBAH CAIR PENYAMAKAN KULIT DENGAN METODE PENGENDAPAN Hastutiningrum, Sri
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 11 Edisi Khusus Oktober 2006
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

Waste from leather tanning process represents one the pollutants coming from va-rious existing industries. One of the dangerous compounds that contains in the liquid waste of leather tanning is chromium (III). In this study, the chromium (III) recovery from leather tanning liquid uses precipitation method.In general, the recovery of chromium (III) procedure starts with measurement of ini-tial pH, filtration of liquid waste and precipitation of chromium (III) using NaOH. The ad-dition of NaOH was also intended to increase the pH of the liquid waste. The liquid waste solution was then aged for several hours at various pH to obtain optimum conditions of precipitation. The obtained precipitation was filtered using various paper filters and finally dissolved again in sulfuric acid until the pH of the solution reached 2,0 – 2,8. The so-lution was analyzed for its chromium (III) content to determine the effectiveness of the recovery. Results of the study showed that Whatman 40 paper filter is more appropriate fil-ter for separating chromium (III) precipitate. The precipitation of chromium (III) proceeded effectively in the solution pH of 8, while the effective time of aging was found to be 24 ho-urs. Resolution of the chromium (III) precipitation using sulfuric acid reached its maximum level when sulfuric acid of 2,5 M was used. This study proved that liquid waste of chro-mium (III) from leather tanning may be reused as additive materials in the leather tanning processes after being recovered from the liquid waste using precipitation method.
SISTEM JARINGAN PERPIPAAN AIR LIMBAH INDUSTRI KERUPUK KULIT SECARA KOMUNAL (STUDI KASUS PADA SENTRA INDUSTRI KERUPUK KULIT DUSUN CEGOKAN, DESA WONOLELO, KECAMATAN PLERET, KABUPATEN BANTUL) Hastutiningrum, Sri; Suseno, Hadi Prasetyo; Ramadhan Topo, Rahmat
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 14 No 1 Agustus 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v14i1.3611

Abstract

Dusun Cegokan, Desa Wonolelo, Kecamatan Pleret, Kabupaten Bantul terdapat 11 industri kerupuk kulit (krecek) rumahan yang melakukan produksi hampir setiap hari dengan menghabiskan bahan baku berupa kulit kerbau maupun sapi sebanyak ± 2 kwintal/hari, dan menghasilkan limbah rata-rata sebesar 16,438 m3/hari. Air limbah yang dihasilkan dibuang ke sungai tanpa dilakukan proses pengolahan air limbah. Beberapa industri belum mempunyai sistem perpipaan untuk menyalurkan limbah yang dihasilkan. Tujuan penelitian ini adalah untuk mendapatkan sebuah perencanaan Sistem Perpipaan Air Limbah untuk mengatasi permasalahan tersebut. Tahap perencanaan sistem perpipaan air limbah meliputi perencanaan sistem perpipaan, pengambilan data kondisi topografi, perhitungan diameter pipa, perhitungan dimensi bak kontrol, merancang gambar peta wilayah, lokasi industri, jalur pipa, serta menghitung rencana anggaran biaya yang diperlukan. Sistem perpipaan air limbah direncanakan secara gravitasi. Jenis pipa direncanakan pipa PVC tipe AW dengan diameter pipa sambungan 2,5 inci, pipa utama berdiameter 3 inci dengan panjang pipa utama 867 m. Bak kontrol direncanakan berbentuk persegi berjumlah 7 unit bak dengan dimensi meliputi: Bak kontrol untuk 1 industri berjumlah 5 unit (panjang = 0,4 m, lebar = 0,4 m, tinggi = 0,4 m). Bak untuk 2 industri berjumlah 1 unit (panjang = 0,48 m, lebar = 0,48 m, tinggi = 0,48 m). Bak kontrol untuk 4 industri berjumlah 1 unit (panjang = 0,6 m, lebar = 0,6 m, tinggi = 0,6 m).
Co-Authors -, Muchlis -, Purnawan Akbar Maulana Grantaka Astari, Novri Anggia Dany, Ajie Kusuma Grantaka, Akbar Maulana Gurusinga, Jefriyadi Hadi Prasetyo Suseno Hadi Saputra Imelda - Novia Dwi Astuti Purnawan Purnawan Ramadhan Topo, Rahmat Soedarsono Soedarsono Sri Sunarsih Sudarsono Sudarsono - Tifani Diah Nisa Tito Ghazy Aflah Wahyuningtyas, Dewi Yuli Pratiwi Yundari, Yundari