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All Journal IPTEK The Journal of Engineering IPTEK The Journal for Technology and Science Seminar Nasional Teknik Kimia Kejuangan JURNAL INTEGRASI PROSES Indonesian Journal of Chemistry Jurnal Chemurgy CHEESA: Chemical Engineering Research Articles JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) Jurnal Teknologi Indonesian Community Journal Sewagati International Journal of Renewable Energy Development
Achmad Dwitama Karisma
Departemen Teknik Kimia Industri, Institut Teknologi Sepuluh Nopember, Kampus ITS, Keputih, Sukolilo, Surabaya 60111
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences Other

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Karakteristik Biokomposit Edible Film dari Campuran Kitosan dan Pektin Limbah Kulit Pisang Kepok (Musa acuminata) Zuchrillah, Daril Ridho; Pudjiastuti, Lily; Puspita, Niniek Fajar; Hamzah, Afan; Karisma, Achmad Dwitama; Surono, Agus; Altway, Saidah; Ardiani, Liana; Rohmah, Nur Azizatur; Ningrum, Eva Oktavia
CHEESA: Chemical Engineering Research Articles Vol. 3 No. 1 (2020)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (859.628 KB) | DOI: 10.25273/cheesa.v3i1.6659

Abstract

Kemasan plastik banyak digunakan pada industri makanan dan minuman di Indonesia karena praktis dan mudah. Namun, disisi lain ini merupakan bencana bagi lingkungan karena plastik merupakan bahan yang sulit terurai (nondegradable). Edible film merupakan salah satu alternatif yang dapat dipertimbangkan untuk menggantikan kemasan plastik. Tujuan dari penelitian ini adalah memanfaatkan kitosan dari limbah cangkang rajungan dan pektin dari limbah kulit pisang kepok sebagai bahan baku pembuatan edible film. Kitosan diperoleh dari proses degreasing, deproteinasi, demineralisasi dan deasetilasi cangkang rajungan. Pektin diperoleh dari proses hidrolisis kulit pisang kepok. Edible film yang berbasis kitosan dan pektin dibuat melalui proses blending dengan ratio (K:P) 100:0; 60:40; 50:50: 40:60 dan 0:100. Analisis karakteristik yang dilakukan meliputi warna, transparan, ketebalan, kelarutan dalam air, laju transmisi uap air (WVTR), kadar air, swelling degree, biodegradabilitas, dan aktivitas antimikroba. Hasil penelitian menunjukkan edible film kitosan dan pektin yang paling optimal adalah ratio 50:50.
Optimization of ultrasonication time on the production of ZnO-SiO2 nanocomposite as photocatalytic material Qomariyah, Lailatul; Faizah, Nurul; Karisma, Achmad Dwitama; Rabbani, Sulthan; Kalloka, Sultan Hendra Mahardi; Putra, Nicky Rahmana
International Journal of Renewable Energy Development Vol 14, No 5 (2025): September 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61248

Abstract

Nanocomposite ZnO-SiO2 is widely known for its efficacy as a semiconductor photocatalyst. Current nanocomposite production methods face challenges like particle agglomeration and inconsistent particle size control. To overcome this problem, the ultrasonication method was used to prevent agglomeration and produce composites in nanoscale, where this study synthesized ZnO-SiO2 for photocatalytic degradation of dye color. To prepare this nanocomposite, the ultrasonication time was varied from 0 to 45 minutes to understand the particle properties and the effectivity on the photocatalytic activity. Silica was prepared from water glass via sol-gel method to produce colloidal SiO2 nanoparticles and then mixed with ZnO with the ratio of 3% wt and subjected to ultrasonication method. Under various ultrasonication time, the FTIR analysis shows the Si-O peak at 895 cm-1 indicates the presence of SiO2 particles. The XRD validate the formation of ZnO-SiO2 nanoparticles, supporting the FTIR analysis. The best nanoparticle properties were achieved with 45 minutes of ultrasonication. The SEM analysis confirms the present of SiO2 and ZnO. From BET analysis, ZnO-SiO2 has a high surface area (117.64 m2/g), moderate pore volume (0.46 cm3/g), and small particle pore size (11.59 nm). The photocatalytic activity of ZnO-SiO₂ nanocomposites was evaluated by the degradation of methylene blue (MB) under sunlight and the best performance reached by the nanocomposite prepared under 45 minutes ultrasonication. The results show that the ultrasonication technique efficiently reduces agglomeration, as indicated by a reduction in particle diameter from 35.04 nm (pure ZnO) to 11.59 nm (ZnO-SiO₂), and significantly enhances photocatalytic activity, achieving 97% degradation of MB under sunlight after 180 minutes. The aforementioned technique demonstrates significant potential for industrial use, providing higher efficiency and expandability in manufacturing superior photocatalytic substances.
Pembuatan Biokompatibel Suture Anchor Berbasis 3D Printing Filament dari Nano Hidroksiapatit Berbahan Dasar Cangkang Keong Sawah Zhafira, Tesa Ulima; Berlian, Baskoro David; Karisma, Achmad Dwitama
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Suture anchor is used to attach soft tissues to the bone. One of the materials that can be used for making suture anchors is hydroxyapatite [Ca10(PO4)6(OH)2]. Hydroxyapatite (HAp)  has similarities with the properties of bone minerals, so it has the potential to be used as a material for making biocompatible suture anchors. However, HAp is brittle and has poor strength, so HAp is usually combined with polymers such as composites to overcome the limitations of its mechanical properties. One of the polymers that can be used is Polycaprolactone (PCL). In this study, HAp was synthesized from rice field snail shells, due to its high calcium contents.  Further, the combination of HAp and PCL in the manufacture of 3D printing filaments such as suture anchors was obtained. The variables used in this study were the mixing ratio of HAp:PCL in making filaments with a mixing ratio of 0.5:9.5; 1:9 ; 2:8. The results of various variables shows that the tensile strength most optimal composite in 7,3 % when mixing HAp:PCl is 0.5:9,5.
Sintesis Nanohidroksiapatit Berbahan Cangkang Keong Sawah (Pila ampullacea) dengan Variasi Konsentrasi H3PO4 Menggunakan Metode Ultrasound Assisted Precipitation Karisma, Achmad Dwitama; Kriswanto, Oktavianus Nugroho; Rachmaningtrias, Renda
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Nanohydroxyapatite with the molecular formula Ca10(PO4)6(OH)2 is a calcium phosphate compound that is most widely used in biomedical applications such as bone and dental implants due to its high biocompatibility. The synthesis of nanohydroxyapatite can be carried out using CaCO3 rich materials such rice field snail shell (Pila ampullacea) with a composition of 93.4% CaCO3. The nanohydroxyapatite synthesis method used is Ultrasound Assisted Precipitation. Calcium obtained from the natural material of rice field snail shell (Pila ampullacea) was reacted with H3PO4 precursor at variable 0.3; 0.5; 0.8; 1; 1.3 M until a precipitate of nanohydroxyapatite particles was formed. To determine the effect of H3PO4 concentration, analysis was conducted on the characteristics of the synthesized nanohydroxyapatite. The SEM-EDX analysis revealed a Ca/P ratio of 1.59-1.72 with spherical particle morphology. The FTIR analysis indicated the presence of hydroxyapatite in the sample through the P-O and O-H functional groups.
Hydroxyapatite Based Material: Natural Resources, Synthesis Methods, 3D Print Filament Fabrication, and Filament Filler Lulu Sekar Taji; Deden Eko Wiyono; Achmad Dwitama Karisma; Agus Surono; Eva Oktavia Ningrum
IPTEK The Journal of Engineering Vol. 8 No. 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v8i1.a12830

Abstract

Hydroxyapatite is a biomaterial that has been recognized in terms of hard tissue engineering due to its similarity in composition to bioapatite. Moreover, abundant resources and diverse synthesis methods make hydroxyapatite easy to produce. The application in terms of 3D print-based network engineering is also being intensively explored due to hydroxyapatite scaffold fabrication process flexibility. In this review, various hydroxyapatite from natural sources, synthesis methods, hydroxyapatite-based 3D print filament fabrication techniques, as well as fillers used in the production of filaments are discussed.
Computational Fluid Dynamics (CFD) Simulation of Mixing Tank at Milk Powder Factory to Reduce Material Losses Agus Surono; Achmad Dwitama Karisma; Muchamad Kurniawan Dwi Febrianto; Fitriah Dwi Mulyani; Daril Ridho Zuchrillah
IPTEK The Journal of Engineering Vol. 9 No. 1 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v9i1.a16323

Abstract

Industrial milk powder production applies the principle of a spray dryer. In the powdered milk industry using a spray dryer, there are still some problems in actual conditions such as fouling in the heat exchanger and losses. Losses are lost material or time so that result in losses for the company. The importance of finding material losses as soon as possible it is possible to make a solution so that initially unknown material is wasted in vain can be used as a finished good. Steps taken to resolve the problem material losses is to identify problems and data by making mapping losses according to actual conditions. After that, a CFD mixing tank simulation can be performed on Ansys with the aim of the simulation is to get the contour of the foaming phenomenon and find out the height the phenomenon of foaming (foam) with the properties set up begins at the beginning of making geometric designs with the size of the tank is 3.5 m and uses a marine propeller type, then proceeds with meshing In geometry, meshing here uses the automatic meshing method due to the limited analysis students. after that the solving stage is carried out by inputting data such as density, viscosity and input multiphase (mixture), viscous (Large Eddy Simulation), as the boundary conditions of the geometry, after that by making a plane from the results of running to form a plane in geometry, then choose the results of the contour volume fraction to find out the phenomena that occur in mixing tank so that conclusions and solutions can be drawn. Based on the results of data analysis and the field in the form of mapping and data on quantity losses, there are still some material losses in the form of wet and dry losses that have not been identified, initially the percentage ratio of material losses is 40.57% to 9%. One of the biggest contributors to material wet losses is mixing tanks which simulated until it is known that there is a foaming phenomenon. It interferes with the way it works level sensor which causes less maximum withdrawal of milk liquid by the pump. The best solution right way to reduce losses that occur in the mixing tank is to close the valve mixing tank output when showing 1.8% or can be rounded to 2% for safety pump. The liquid that is used as a product is 270 liters which is equivalent to 113 kg. If the calculation is carried out, the company can store 8,505 kg/month of powder.
Co-Authors Adi Soeprijanto Afan Hamzah, Afan Agung Subyakto Agus Surono Agus Surono Agustiani, Elly Agustiani, Elly Ali Altway Altway, Saidah Anggraeni, Agnes Surya Putri Ardiani, Liana Aris Tjahyanto Ash Shiddiqi, Qifni Yasa Atletiko, Faizal Johan Atria Pradityana Ayu Sari Larasati Bambang Hari Prabowo Berlian, Baskoro David Deden Eko Wiyono Deden Eko Wiyono Ely Agustiani Eva Lestiana Pratiwi Fitriah Dwi Mulyani Goto, Motonobu Inayah, Yasmin Isyarah Labbaika Shaffitri Kalloka, Sultan Hendra Mahardi Kriswanto, Oktavianus Nugroho Lailatul Qomariyah Lailatul Qomariyah, Lailatul Lily Pudjiastuti, Lily Lulu Sekar Taji Lulu Sekar Taji Machmudah, Siti Mentari Rachmatika Mukti Muchamad Kurniawan Dwi Febrianto Niniek Fajar Puspita, Niniek Fajar Nugroho, Muhammad Aldi NURUL FAIZAH Prameswari, Regita Prameswari, Virdha Alifyana Prida Novarita Trisanti, Prida Novarita Putra, Nicky Rahmana Qifni Yasa Ash Shiddiqi Rabbani, Sulthan Rachmaningtrias, Renda Rafina Pertiwi Putri Rohmah, Nur Azizatur Suprapto Suprapto Suprapto Suprapto Suprapto Suprapto Susilo, Muhammad Rizky Aulia Tantular Nurtono Tetrisyanda, Rizky Triastuti, Warlinda Eka Ulum, Muhamad Bahrul Wahyudiono, Wahyudiono Warlinda Eka Triastuti Widiyastuti, Widiyastuti Winardi, Sugeng Zhafira, Tesa Ulima Zuchrillah, Daril Ridho Zuchrillah, Daril Ridho