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All Journal Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi CHEDS: Journal of Chemistry, Education, and Science JURNAL VOKASI TEKNIK (JUVOTEK)
Rachmiadji, Irwan
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Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PENGARUH PEMAKAIAN KLORIN TERHADAP KADAR MANGAN (Mn) DAN BESI (Fe) PADA POST – CHLORINASI DI PT XYZ Rosmiati, Rosmiati; Barus, Adil; Rachmiadji, Irwan; Silowaty Purba, Darry Christine
JURNAL VOKASI TEKNIK Vol 1 No 02 (2023): JURNAL VOKASI TEKNIK (JUVOTEK)
Publisher : CV MEDAN TEKNO SOLUSI

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

Abstract

Air sungai Deli yang digunakan sebagai air baku PT. XYZ Deli Tua terdapat zat mangan dan besi dengan kadarnya cukup tinggi serta melebihi ambang baku mutu. Tujuan penelitian ini untuk mengetahui efektivitas kaporit dalam menurunkan kadar mangan dan besi sehingga memenuhi standar baku mutu Peraturan Menteri Kesehatan Nomor 492 Tahun 2010. Sampel air yang digunakan dalam penelitian ini diambil dari 2 titik lokasi Instalasi Pengolahan Air (IPA) Deli Tua. Sampel air baku diambil dengan menggunakan pompa air submersible (pompa celup) yang berada di dasar sungai Deli. Penelitian dilakukan dengan eksperimen jar test di laboratorium. Metode analisis untuk menentukan kadar mangan berdasarkan 1-(2-Pyridylazo)-2-Napthol PAN Method tahun 1977 dan kadar besi mengacu pada FerroZine Rapid Liquid Method tahun 1970 dengan menggunakan metode Spektrofotometri. Hasil penelitian menunjukan kadar mangan dan besi yang cukup tinggi hingga melebihi standar yang telah ditetapkan dalam Peraturan Menteri Kesehatan Nomor 492 Tahun 2010 dengan kadar Mn maksimal 0,4 mg/L dan kadar Fe maksimal 0,3 mg/L. Setelah dilakukan penambahan bahan kimia kaporit ke dalam sampel air sungai Deli dari IPA Deli Tua untuk penurunan Mn dan Fe dapat efektif menurunkan kadar Mn sebesar 82,29 dan Fe sebesar 62,87% dan memenuhi standar baku mutu yang digunakan.
BESARNYA PERTAMBAHAN PANJANG RANTAI BUCKET CONVEYOR TIPE IBS AKIBAT BEBAN ANGKAT 4 TON DAN BEBAN MAKSIMUM Darmadi, Herry; Jajuliansyah, Jajuliansyah; Nelza, Novia; Rachmiadji, Irwan; Karo Karo, Justaman Arifin
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 9, No 2 (2023): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v9i2.8622

Abstract

Chain is a series of links or rings that are connected or attached to one another so that they form an elongated shape. Chains are used to move loads or continue rotation. One of the chains that is often used is steel. One of them is a roller chain installed in a bucket conveyor, where this conveyor functions to convey crumb rubber from one process to the next. In this research the author carried out two tests on the chain to obtain an increase in the length of the chain. In the first test the chain plate was carried out in a tensile test with a load of 4 tons and the second test was carried out with a maximum load until the chain broke. After the author carried out the first test, the amount of increase in chain length (ɛ) after being averaged was 0.54%. In the second test, the maximum load (Fmax) after being averaged was 7.298 tons, and the increase in chain length (ɛ) was 7.2%.
The Development of an IoT-Based Palm Solid Waste Counting System for Empty Fruit Bunches in the Palm Oil Industry Siregar, Emil Salim Parhimpunan; Mirnandaulia, Meutia; Hutajulu, Poltak Evencus; Hidayani, Tengku Rachmi; Marbun, New Vita Mey Dessty; Rachmiadji, Irwan; Hikmawan, Oksya; Hariyanto, Hariyanto; Tarigan, Enda Rasilta Br.; Simanjuntak, Andreas Rumata; Falah, Miftahul; Pardede, Erwin; Donda, Donda; Sitepu, Evi Christiani
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 10, No 4 (2024): December
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpkm.93563

Abstract

The recent application of palm empty fruit bunches as solid waste directly on soil or as organic fertilizer has enhanced palm farms. Moreover, the co-products of this palm oil mill constitute a dependable metric for assessing mill processing performance, specifically regarding quantity and weight. The quantity of palm empty fruit bunches is usually ascertained through manual counting using a hand counter during processing. The imprecision in calculating palm empty fruit bunches is a limitation of this method, as operators sometimes perform erroneous calculations, overlook quantities, and produce contradictory results for mill management. To address this issue, the sector requires enhanced execution of a monitoring and counting system methodology. The aim of this community service project is to create an empty fruit bunches count station using an IoTbased palm solid waste counting system for use in palm mills. The Ministry of Industry - Politeknik Teknologi Kimia Industri (PTKI) Medan will engage in and oversee the advancement of Industry 4.0 within the industrial sector. The initiative was executed at Tanah Gambus Estate in Batubara Regency, North Sumatra. Assistance was provided by a palm mill partner associated with PT. Socfin Indonesia. The implementation of the empty fruit bunches palm oil counting system was conducted efficiently, facilitating optimal operations, real–time online monitoring, uninterrupted functionality exceeding 24 hours daily, swift assessment of the empty fruit bunches volume, immediate identification of traditional counting inaccuracies by operators and management, and its station provides benefits to the palm industry.
ANALISIS KADAR NaCl PADA PROSES REGENERASI RESIN DALAM PENURUNAN KESADAHAN Ca2+ DAN Mg2+ PADA PROSES WATER TREATMENT DI PT. ANY Nelza, Novia; Maulidna, Maulidna; Rachmiadji, Irwan; Barus, Adil; Donda, Donda; Darmadi, Herry
CHEDS: Journal of Chemistry, Education, and Science Vol 8, No 2 (2024)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v8i2.10127

Abstract

Resin merupakan bahan yang mengandung ion-ion yang dapat ditukar dengan ion-ion yang ada di dalam air. Resin sebagai media penukar ion memiliki kemampuan terbatas dalam menukar ion hingga resin jenuh. Resin yang telah mengalami kejenuhan akan diregenerasi menggunakan larutan NaCl sehingga kemampuan resin dalam menukar ion kembali efisien. Dari perhitungan yang telah dilakukan diketahui bahwa jumlah NaCl yang digunakan untuk proses regenerasi dapat ditentukan dengan menghitung jumlah zat reaktif yang ditukar resin dengan kesadahan yang terkandung dalam air. Cara penentuan tingkat kesadahan dalam air menggunakan metode titrasi kompleksometri. Dari hasil penelitian yang telah dilakukan diketahui besarnya kekerasan yang terserap sebesar 18,9387 mg/L untuk logam Ca2+ dan 9,324 mg/L untuk logam Mg2+, jumlah zat reaktif Na+ yang ditukar sebesar 14,4763 mg/L untuk Ca2+ dan 7,0462 mg/L. mg/L untuk logam Mg2+ dan jumlah NaCl yang dibutuhkan sebesar 21,1504 mg/L untuk regenerasi resin.
Co-Authors Barus, Adil Darmadi, Herry Donda, Donda HARIYANTO HARIYANTO Hikmawan, Oksya Hutajulu, Poltak Evencus Jajuliansyah, Jajuliansyah Karo karo, Justaman Arifin Marbun, New Vita Mey Dessty Maulidna, Maulidna Miftahul Falah Mirnandaulia, Meutia Nelza, Novia Pardede, Erwin Rosmiati Rosmiati Silowaty Purba, Darry Christine Simanjuntak, Andreas Rumata Siregar, Emil Salim Parhimpunan Sitepu, Evi Christiani Tarigan, Enda Rasilta Br. Tengku Rachmi Hidayani, Tengku Rachmi