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Achmad Chumaidi, Achmad
Jurusan Teknik Kimia Politeknik Negeri Malang
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PERANCANGAN REAKTOR PADA PROSES PEMBUATAN DISPROPORTIONATED ROSIN DARI GUM ROSIN MELALUI NETRALISASI ASAM KLORIDA Amanda Dewi Amalia; Achmad Chumaidi
DISTILAT: JURNAL TEKNOLOGI SEPARASI Vol 8, No 3 (2022): September 2022
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v8i3.453

Abstract

Kawasan hutan di Indonesia memiliki keanekaragaman hayati yang melimpah. Salah satu jenis tanaman hutan adalah pohon pinus. Pohon pinus dimanfaatkan getahnya untuk diolah menjadi berbagai macam produk, seperti gondorukem dan terpentin serta turunannya. Disproportionated rosin merupakan salah satu produk turunan dari gondorukem, biasanya digunakan sebagai bahan tambahan dalam produksi karet sintetis, ban, hingga cat dinding. Proses pembuatan disproportionated rosin melalui reaksi pelarutan gum rosin dengan etanol, reaksi penambahan larutan HCl 37%, dan reaksi pembentukan produk Na-abietik di dalam reaktor berpengaduk. Tujuan perancangan alat ini adalah merancang reaktor untuk proses disproporsionasi dalam pembuatan disproportionated rosin. Perancangan dilakukan dengan menentukan jenis reaktor, jenis material, dan dimensi reaktor. Hasil dari perancangan menunjukkan reaktor yang digunakan adalah reaktor berpengaduk berdiameter 2,7337 m dan tinggi 5,0404 m. Bentuk tutup atas dan tutup bawah dari reaktor berbentuk standard dished head dan jenis material dari reaktor yaitu Stainless steel SA-167 Grade 3 Type 304.
PENGARUH VOLUME ASAM KLORIDA “HCl” TERHADAP KARAKTERISTIK FISIK DISPROPORTIONATED ROSIN (DPR) DARI BAHAN BAKU GUM ROSIN TIPE WG Alisna Imtihana Khadijah; Achmad Chumaidi
DISTILAT: JURNAL TEKNOLOGI SEPARASI Vol 8, No 3 (2022): September 2022
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v8i3.393

Abstract

Gum Rosin mengalami peningkatan produksi di Indonesia tetapi tidak diimbangi dengan sumber daya alam yang maksimal, Gum Rosin umumnya dimanfaatkan dalam bentuk non-modifikasi di bidang perindustrian dan digunakan sebagai bahan pada pabrik kertas (sizing agent), pabrik tinta cetak, pernis, dan perekat. Namun Gum Rosin non-modifikasi memiliki banyak kelemahan antara lain memiliki bentuk berupa padatan atau kristal, terjadi proses oksidasi secara alami, dan dapat menyebabkan reaksi dengan garam-garam logam berat terutama pada penggunaan untuk pernis sehingga penggunaan Gum Rosin dalam bentuk non-modifikasi menjadi tidak efektif. Oleh karena itu, perlu dilakukan modifikasi untuk mengatasi kelemahan tersebut. Salah satu produk turunan dari Gum Rosin adalah Disproportionated Rosin (DPR). Pada pembuatan Disproportionated Rosin (DPR) menggunakan metode yang pelarutan, pemanasan, filtrasi, dan penguapan untuk memisahkan larutan etanol dengan Disproportionated Rosin. Tujuan penelitian adalah untuk mengetahui pengaruh volume HCl terhadap karakteristik fisik Disproportionated Rosin (DPR) dari Gum Rosin Tipe WG. Pembuatan produk Disproportionated Rosin (DPR) melalui proses pemanasan dan penambahan HCl dengan variabel 3 mL, 4 mL, dan 5 mL. Variabel tetap yang digunakan adalah pelarut etanol sebanyak 100 ml, massa Gum Rosin 5 gram, dan konsentrasi NaOH 0,1N. Dengan percobaan beberapa variabel tersebut, didapatkan hasil paling optimum pada saat perbandingan antara massa Gum Rosin dan volume HCl 1:1 yaitu 5 gram Gum Rosin dan 5 mL HCl dengan volume Disproportionated Rosin yang dihasilkan 83 mL dan volume NaOH yang dibutuhkan 24 mL. Kata kunci: asam abietik, disproportionated rosin, gum rosin
BIMBINGAN TEKNIS PENGUJIAN FORMALIN PADA MAKANAN UNTUK KERURAHAN POHJENTREK KOTA PASURUAN achmad chumaidi; Yanty Maryanty; Dyah Ratna Wulan; Sabrina Adani Putri
Jurnal Pengabdian Kepada Masyarakat (J-ABDIMAS) Vol 9 No 1 (2022): JURNAL PENGABDIAN KEPADA MASYARAKAT 2022
Publisher : Publisher UPT P2M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jabdimas.v9i1.180

Abstract

PKM is carried out with the aim of mentoring in the form of education regarding the characteristics of formalin food and the impact of formalin on health, how to make your own formalin test kit.PKM is carried out in the form of guidance in the form of education regarding the characteristics of formalin food and the impact of formalin on health, how to make your own formalin test kit, and community training to identify formalin foods. This training was carried out by an online teleconference between the PkM implementing lecturers and the residents of Pohjentrek Pasuruan considering the COVID-19 pandemic was still ongoing, which was followed by the direct submission of modules related to the formalin test (containing information about the dangers of using formalin in food, how to make a formalin test kit and how to test formalin) and delivery formalin test kit solution.
BIMBINGAN TEKNIS PEMBUATAN PUPUK BOKASHI UNTUK PKK RT 01/RW 01 POHJENTREK – PASURUAN Abdul Chalim; Achmad Chumaidi; Shabrina Adani Putri; Andi Nina
Jurnal Pengabdian Kepada Masyarakat (J-ABDIMAS) Vol 9 No 1 (2022): JURNAL PENGABDIAN KEPADA MASYARAKAT 2022
Publisher : Publisher UPT P2M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jabdimas.v9i1.182

Abstract

Trainings for developing work skills for PKK women in RT 01/RW 01 Pohjentrek Pasuruan are rarely held, so through this PkM activity, residents of RT 01/RW 01 Pohjentrek Pasuruan have been given skills training to be more independent so that they have jobs and a decent life. . One of the skills that can be trained is making bogashi fertilizer. Bokashi fertilizer is a fertilizer made with a composting method that can use an aerobic or anaerobic starter to compost organic matter. This organic material itself can be obtained from household kitchen waste such as leftover vegetables, fruits, rice, etc., so it does not require a fee or tends to be cheap. The PkM was carried out on Friday, October 2, 2020 online as well as team representatives who gave directions and submitted materials for making bokashi fertilizer, video tutorials for making bokashi fertilizer, manuals, composters and bokashi fertilizer products themselves. Publication is carried out on youtube media and the website of the Polynema Chemical Engineering department
BERBAGAI PROSES DALAM PEMBUATAN DISPROPORTIONATED ROSIN DARI GONDORUKEM DENGAN PRESIPITASI NAOH Danang Rizky Mahendra; Elinda Kartika Sari; Rossy Arifatul Chabibah; Shahifa Habiba; Achmad Chumaidi
DISTILAT: JURNAL TEKNOLOGI SEPARASI Vol 7, No 2 (2021): August 2021
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v7i2.196

Abstract

Indonesia memiliki kawasan hutan yang sangat luas dengan keanekaragaman hayati yang melimpah. Banyak manfaat yang dapat diperoleh dari tanaman hutan, salah satunya adalah pohon pinus. Salah satu manfaat yang dapat diambil dari pohon pinus adalah getahnya, yang dapat diolah menjadi produk bernilai jual tinggi seperti gondorukem dan terpentin. Disproportionated rosin adalah salah satu produk turunan dari gondorukem, biasanya digunakan sebagai bahan tambahan dalam produksi karet sintetis, ban, hingga cat dinding. Penelitian dilakukan secara ekperimental untuk mengetahui  pengaruh massa gondorukem dan konsentrasi NaOH terhadap disproportionated rosin yang dihasilkan. Proses dilakukan pada suhu ruang dengan pelarut etanol 96%, tanpa menggunakan katalis. Larutan NaOH digunakan untuk mengikat asam abietik dalam gondorukem menjadi na-abietic, sehingga dapat terbentuk disproportionated rosin. Variasi massa gondorukem yang digunakan adalah 5 gram, 8 gram, 12 gram dan 20 gram. Variasi konsentrasi NaOH yang digunakan adalah 0.1 M, 0.25M, 0.5 M, dan 1 M. Hasil terbaik didapatkan pada variabel massa gondorukem 8 gram dan konsentrasi 0.1 M, dengan disproportionated rosin yang dihasilkan sebanyak 41,5 ml dan endapan Na-abietik 3,5 gram.
BIMBINGAN TEKNIS PENGUJIAN FORMALIN PADA MAKANAN UNTUK KERURAHAN POHJENTREK KOTA PASURUAN Achmad Chumaidi; Yanty Maryanty; Dyah Ratna Wulan; Sabrina Adani Putri
Jurnal Pengabdian kepada Masyarakat Vol. 9 No. 1 (2022): JURNAL PENGABDIAN KEPADA MASYARAKAT 2022
Publisher : P3M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jabdimas.v9i1.180

Abstract

PKM is carried out with the aim of mentoring in the form of education regarding the characteristics of formalin food and the impact of formalin on health, how to make your own formalin test kit.PKM is carried out in the form of guidance in the form of education regarding the characteristics of formalin food and the impact of formalin on health, how to make your own formalin test kit, and community training to identify formalin foods. This training was carried out by an online teleconference between the PkM implementing lecturers and the residents of Pohjentrek Pasuruan considering the COVID-19 pandemic was still ongoing, which was followed by the direct submission of modules related to the formalin test (containing information about the dangers of using formalin in food, how to make a formalin test kit and how to test formalin) and delivery formalin test kit solution.
BIMBINGAN TEKNIS PEMBUATAN PUPUK BOKASHI UNTUK PKK RT 01/RW 01 POHJENTREK – PASURUAN Abdul Chalim; Achmad Chumaidi; Shabrina Adani Putri; Andi Nina
Jurnal Pengabdian kepada Masyarakat Vol. 9 No. 1 (2022): JURNAL PENGABDIAN KEPADA MASYARAKAT 2022
Publisher : P3M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jabdimas.v9i1.182

Abstract

Trainings for developing work skills for PKK women in RT 01/RW 01 Pohjentrek Pasuruan are rarely held, so through this PkM activity, residents of RT 01/RW 01 Pohjentrek Pasuruan have been given skills training to be more independent so that they have jobs and a decent life. . One of the skills that can be trained is making bogashi fertilizer. Bokashi fertilizer is a fertilizer made with a composting method that can use an aerobic or anaerobic starter to compost organic matter. This organic material itself can be obtained from household kitchen waste such as leftover vegetables, fruits, rice, etc., so it does not require a fee or tends to be cheap. The PkM was carried out on Friday, October 2, 2020 online as well as team representatives who gave directions and submitted materials for making bokashi fertilizer, video tutorials for making bokashi fertilizer, manuals, composters and bokashi fertilizer products themselves. Publication is carried out on youtube media and the website of the Polynema Chemical Engineering department
Case Report: Management Penetrating Brain Injury Across Middle Third of Superior Sagittal Sinus Chumaidi, Achmad; July, Julius
Medicinus Vol 12, No 1 (2022): October
Publisher : Fakultas Kedokteran Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/med.v10i2.7025

Abstract

Background: Penetrating cranial injuries are rarely reported on thick parietal bone. Goal of its management include removal of the foreign object while minimizing furher damage to the brain and associated neurovascular structures, also prevent further complications.Case Description: We report a case of a 22-year-old male presented with machete stucked in his head following an accidentally fell down of the weapon from a coconut tree. The cranial location affected were midparietal. He was disoriented on admission, with neither neurological focal signs nor seizure. Computed tomography (CT) revealed that the object penetrate middle superior sagittal sinus. After emergency craniotomy to remove the objects, debridement, dural sinus repair were performed. Recovery was complete without sequelae.Conclusion: Laceration of the middle thirds of the superior sagittal sinus require special handling and care during surgery. Operative approach and treatment strategies are among the most important considerations to achieve the best patient outcomes. 
Development of a Novel Support Modification for Efficient Lipase Immobilization: Preparation, Characterization, and Application for Bio-flavor Production Moentamaria, Dwina; Irfin, Zakijah; Chumaidi, Achmad; Widjaja, Arief; Widjaja, Tri; Muharja, Maktum; Darmayanti, Rizki Fitria
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 2 Year 2024 (August 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20130

Abstract

The low cost and excellent catalytic properties of lipase for industrial processes are highly desirable. A promising new approach involves the support modification of lipase and spacer arm, which enables the enhancement of lipase properties. This study investigates the immobilization of crude lipase from Mucor miehei onto a Polyurethane Foam (PUF) surface using various coating techniques. The PUF matrix was obtained through isocyanate and polyol reactions. Subsequently, the PUF was coated by adsorbing lipase and adding edible support material. The immobilized lipase was then utilized in the hydrolysis of coconut oil to produce fatty acids. Furthermore, the immobilized enzyme was employed in the esterification of fatty acids to produce bio-flavors. The results demonstrate that the attachment reaction using support material, namely lecithin, gelatin, MgCl2, and Polyethylene glycol 6000 (PEG), all of which are simple and edible, was able to enhance the stability and reusability of lipase. This immobilization technique increased triglyceride hydrolysis into FFA by 422%. The successful edible support modification of immobilized lipase from M. miehei on PUF, coupled with significantly enhanced enzyme stability and catalytic activity, offers a promising, environmentally friendly solution for diverse applications in the food industry. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Case Report: Management Penetrating Brain Injury Across Middle Third of Superior Sagittal Sinus Chumaidi, Achmad; July, Julius
Medicinus Vol. 12 No. 1 (2022): October
Publisher : Fakultas Kedokteran Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/med.v10i2.7025

Abstract

Background: Penetrating cranial injuries are rarely reported on thick parietal bone. Goal of its management include removal of the foreign object while minimizing furher damage to the brain and associated neurovascular structures, also prevent further complications.Case Description: We report a case of a 22-year-old male presented with machete stucked in his head following an accidentally fell down of the weapon from a coconut tree. The cranial location affected were midparietal. He was disoriented on admission, with neither neurological focal signs nor seizure. Computed tomography (CT) revealed that the object penetrate middle superior sagittal sinus. After emergency craniotomy to remove the objects, debridement, dural sinus repair were performed. Recovery was complete without sequelae.Conclusion: Laceration of the middle thirds of the superior sagittal sinus require special handling and care during surgery. Operative approach and treatment strategies are among the most important considerations to achieve the best patient outcomes. 
Co-Authors Abdul Chalim Abdul Chalim Afida Kartika Sari Ahsan, Muhammad Hafizh Aldifi Kresmagus Aldillah, Ahmad Zaky Alfajri, Aulia Romadhona Jihad Alisna Imtihana Khadijah Amalia, Amanda Dewi Amanda Dewi Amalia Andi Nina Anggit Murdani Annyssa Maylia Ansar, Ellana Nabilah Nur Averina Aprillia Dwi Ardianti Arum Kartikasari Arum Kartikasari, Arum Auliastuti, Miranda Ajeng Budiana, Novita Eka Nur Ilma Bunga Rajhana Ragil Gayatri Chabibah, Rossy Arifatul Chintya A. P. Sari Danang Rizky Mahendra Darminawati, Lusiana Destiana R. A. Palupi Dewajani, Heny Dewi, Ernia Novika Dhevita Tara Dwi Prastika Dini Qurrota Ayuni Arita Putri Dyah Ratna Wulan Ekawati, Safitri Eko Naryono Elinda Kartika Sari Ellana Nabilah Nur Averina Ansar Erliyanti, Nove Kartika Erwan Adi Saputro Fajri, Aulia Romadhona Jihad Al Febrianti U. D. Pratiwi Febrianti U.D. Pratiwi Gayatri, Bunga Rajhana Ragil Girlian Agaian, Girlian Girlian, Girlian Gusniawan, Prayoga Vicky Habiba, Shahifa Ilma, Novita Irfin, Zakijah Jatmiko Jatmiko Julius July Khadijah, Alisna Imtihana Kresmagus, Aldifi Kubha, Catharina Bernadeta Kusuma, Heri Septya Kusuma, Rieza Mahendra M. Ivan Ariful Fathoni M., Danang Rizky Mahendra, Danang Rizky Mahendra, Rinda Matmulyanto, Matmulyanto Maylia, Annyssa Meilita Mustika Ridhawati, Meilita Mustika Miranda Ajeng Auliastuti Muhammad Badril Munir Muhammad Naufal, Muhammad Muharja, Maktum Munir, Muhammad Badril Mustika, Meilita Againa Mutakhabbibatillah, Mutakhabbibatillah Nanik hendrawati, Nanik Palupi, Destiana R. A. Prakoso, Prizqi Pranata, Estitika Fidya Prastica, Yuniar Eka Prastika, Dhevita Tara Dwi Pratiwi, Febrianti U. D. Pratiwi, Febrianti U.D. Prizqi Prakoso Qurrota’Ayuni, Dini Rachmad Ramadhan Yogaswara Rahma, Anne Rizki Fitria Darmayanti Rossy Arifatul Chabibah Sabrina Adani Putri Safitri Ekawati Salsabila, Afifa Salsabila, Anne Rahma Salsabilla, Yoan Sandifa, Muhammad Naufal Sari, Chintya A. P. Sari, Elinda Kartika Setyorini, Alvira Alwa Shabrina Adani Putri Shahifa Habiba Sjarief Widjaja Suryandari, Ade Sonya Takwanto, Anang Tina, Aprillia Nur Tri Widjaja Wardah, Afifatul Yanty Maryanty, Yanty Yogi Prana Izza Yuniar Eka Prastica Zakijah irfin