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All Journal JURNAL KIMIA SAINS DAN APLIKASI Eksergi: Chemical Engineering Journal Jurnal Teknologi Pertanian Jurnal Ilmiah Teknik Kimia MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering REACTOR : Journal of Research On Chemistry And Engineering Journal of Industrial Community Empowerment SAINTI: Majalah Ilmiah Teknologi Industri Journal Of Chemical Process Engineering PATRIOTIK: Jurnal Inovasi dan Pemberdayaan Masyarakat
Yahya, Agung Kurnia
Politeknik ATI Padang
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Pengaruh Eksitasi Gelombang Iradiasi Ultrasonik Terhadap Kadar Tanin pada Maserasi Biji Pinang Wangi Rosalina Rosalina; Ferry Ikhsandy; Agung Kurnia Yahya; Hibrah Hibrah
REACTOR: Journal of Research on Chemistry and Engineering Vol 2, No 2 (2021): Published in December 2021
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v2i2.30

Abstract

Nagari Sikucua, Kampung Dalam Subdistrict, Padang Pariaman produces nearly 800 tons of fragrant areca nut every year which is sent to Jambi to meet export needs. Areca nut contains tannins, substances that have many benefits, some of which are anti-inflammatory, corrosion inhibitors, antioxidants. This study aims to obtain tannins in areca nut extract through a kinetic maceration process with pre-treatment with ultrasonic irradiation wave. The dried areca nut was ground and sieved with various sizes of 20, 40 and 70 mesh and then extracted with ethanol as solvent. The concentration of ethanol used consisted of 35%, 50%, 65% and 80%. Ultrasonic irradiation waves were given for the initial 15 minutes of maceration and then continued with kinetic maceration for up to 4 hours in a water bath at 45°C. The extraction results were concentrated in a rotary evaporator and then tested for tannin levels using Follin Denish reagent in the standard series of tannic acid as a comparison with spectrophotometer UV-Vis. The highest yield of tannin content 11.10% was obtained in the 4-hour maceration process with pre-treatment ultrasonic irradiation at concentration of 80% ethanol with a size of 40 mesh.
Variation of Time and Ethanol Solvent Concentration Of Kinetic Maceration Tannin Extraction From Aromatic Areca Catechu Hibrah Hibrah; Ferry Ikhsandy; Agung Kurnia Yahya; Rosalina Rosalina
Jurnal Ilmiah Teknik Kimia Vol 6, No 1 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i1.14180

Abstract

Aromatic areca catechu is one of the main agro commodities in West Sumatra. It contains tannin which are valuable compounds that are widely used in the textile industries, leather product manufacturing, or furniture industries. Utilization of tannin extraction from the aromatic betel nut is expected to increase its economic value. This study aims to extract tannin through kinetic maceration methods by varying the maceration duration of 1,2,3,4, and 5 hours; and varying the solvent concentration of ethanol 35%, 50%, 65%, 80%, and 96%. The scented areca nut powder used has a mesh size of e” 20, the stirring speed 450 rpm and the temperature kept constant at 45 oC. The extraction results were then concentrated and tested by UV-Vis spectrophotometric analysis with a standard solution of tannic acid. Optimal yield value is 3.750%  identified at maceration length of 2 hours with a solvent concentration of 65% ethanol.
STUDI KADAR TANIN DAN INHIBISI OKSIDAN HASIL MASERASI BIJI PINANG WANGI DENGAN PERLAKUAN DAN TANPA PERLAKUAN ULTRASONIK Rosalina; Hibrah; Agung Kurnia Yahya; Ferry Ikhsandy
JURNAL TEKNOLOGI PERTANIAN Vol. 11 No. 1 (2022)
Publisher : Prodi Teknologi Pangan Fakultas Pertanian Universitas Islam Indragiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/jtp.v11i1.1965

Abstract

Areca nut from Padang Pariaman as an export commodity is rich in tannin content and its ability as an antioxidant is used as the object of this research. The extraction of fragrant betel nut seeds has been carried out using the usual kinetic maceration method and the kinetic maceration method with ultrasonic wave irradiation pretreatment. The purpose of this study was to study the effect of ultrasonic irradiation on the tannin content, total phenol and antioxidant inhibition of the ethanol extract of areca nut seeds. A total of 20 grams of areca nut powder in a mesh variation of 20, 40 and 70 was extracted in 200 ml of ethanol with a solvent variation of 65% and 80%. Using three treatments, namely maceration treatment without ultrasonic irradiation, maceration with 15 minutes of ultrasonic irradiation pretreatment and the third treatment with 30 minutes of ultrasonic irradiation. The solvent was evaporated in a rotary evaporator and then tested for tannin levels using Follin Denish and DPPH reagents to measure antioxidants. The results of the highest tannin content were obtained in the third treatment, namely maceration with ultrasonic irradiation treatment 30 minutes, areca nut powder size 40 mesh, ethanol solvent 80% obtained tannin content of 12.5%. Meanwhile, the highest antioxidant activity was obtained at 70 mesh size, 80% ethanol solvent and the same treatment, which was 81.78.
Pelatihan Pembuatan Pupuk Cair Organik Dari Limbah Nasi Berekstrak Sereh pada Kelompok Tani Pembibitan Tanaman Bunga dan Buah Lubuk Minturun Muhammad Zulfikar Luthfi; Ferry Ikhsandy; Agung Kurnia Yahya; Hibrah Hibrah; Harmiwati N. H; Renold Ramadhan Putra
Journal of Industrial Community Empowerment Vol 1, No 2 (2022): Published in October 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (689.288 KB)

Abstract

The agricultural sector is one of the main pillars of the economy in Koto Tangah District. Increasing agricultural production requires the support of fertilizer availability in terms of quantity and price. In order to provide fertilizer at competitive prices, fertilizers are needed at low prices and are environmentally friendly. This community service activity is given to the community in Lubuk Minturun Village in the form of training in the manufacture of liquid organic fertilizer (POC) with a fermentation process and extracts of lemongrass. The main ingredient of this fertilizer is rice waste which can be easily collected by local people. The training covers the process of making fertilizer, the fermentation process to packaging. Lemongrass extract is added to increase nutrients in the soil and reduce odors from the fermentation process. The proposing team took this theme in order to provide an alternative for making POCs to the community in Lubuk Minturun Village in the hope of contributing to local flower or fruit plant nurseries. In this case, the proposing team took Lubuk Minturun Village as a model because this area is located close to the ATI Padang Polytechnic Campus, so that it can help the lives of the people around the campus.
ANALISA HEAD LOSS DAN KERJA POMPA DENGAN VARIASI PERUBAHAN DIAMETER PADA SISTEM PEMIPAAN Agung Kurnia Yahya; Puji Rahayu; Hasnah Ulia; Achmad Yanuar Maulana
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 19, No 2 (2022): VOL 19 NO 2 DESEMBER 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (286.699 KB)

Abstract

Fluids often experience a loss of energy (head loss) in the pipe due to flow turbulence, which results in friction on the inner surface of the pipe. Head loss is very detrimental in piping systems because it can reduce the level of fluid flow efficiency. Head loss is affected by variations in bends (elbows), joints, valves, and pipe diameters. The purpose of this study is to determine the head loss that occurs in each line of the fluid flow piping system, which consists of variations in the cross-sectional area of the pipe and the number of connections, valves, and bends. In addition, it is also used to evaluate pump work in series and complex circuits. The smaller the diameter, the more the fluid velocity increases, causing the friction in the pipe to increase and the head loss to increase. The pump work required to flow the fluid is directly proportional to the amount of head loss that occurs in the piping system.
Pembuatan Nata De Coco di Nagari Kamang Hilir Kabupaten Agam Sebagai Upaya Pemberdayaan Masyarakat Hasnah Ulia; Apsari Puspita Aini; Enny Nurmalasari; Miftahul Khairati; Muhammad Zulfikar Luthfi; Agung Kurnia Yahya
Journal of Industrial Community Empowerment Vol 2, No 1 (2023): Published in April 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v2i1.190

Abstract

Agam district has a coconut plantation of 56,744 hectares with an average production of 3,000 tons per year. Coconut water is one of the coconut plant products that has not been utilized optimally. Many benefits or new products that have a higher selling value use coconut water as a raw material. One of the products derived from coconut water that we consume daily is Nata de coco. Nata de coco has high fiber, but low in calories. Nata de coco can also be a business opportunity for the home industry. Based on the business opportunity from Nata de coco, The community service of Politeknik ATI Padang held the training of the production of Nata de coco to the women community in Kamang Hilir Village, Agam District, West Sumatera. The training was carried out on February 5, 2023 attended by 30 participants. The training began with the explanation about the materials and tools used in making Nata de coco. The main materials used were coconut water, urea, sugar, Acetobacter xylinum. Then, the practice is carried out jointly between the women community and the community service team from Politeknik ATI Padang. The training was closed with the presentation of business prospective from Nata de coco. All of the participants were enthusiastic with this training. It is expected that the women community in Kamang Hilir Village have the knowledge and the skill to make their own Nata de coco.  
Metode Modifikasi Membran Polietersulfon (PES) Untuk Meningkatkan Antifouling−Mini Review Modifikasi Membran Enny Nurmalasari; Hasnah Ulia; Apsari Puspita Aini; Agung Kurnia Yahya; Yunita Fahni
Eksergi Vol 20, No 2 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i2.9596

Abstract

Polyethersulfone (PES) is the most common material in various medical and water treatment applications because of its excellent mechanical and thermal properties. The hydrophobicity of polyethersulfone is considered as one of the main drawbacks because the hydrophobic surface causes a high biofouling effect on the membrane, so it has limitations in using Polietersulfon PES membrane technology. Modification of PES membranes is an important topic to be continuously developed to improve the properties of PES membranes. Membrane modifications focus on increasing the hydrophilicity, selectivity, and stability of membranes that are expected to be used commercially. Modifications were made to change the hydrophobic membrane surface into a hydrophilic membrane with good mechanical properties by introducing hydrophilic properties and functional groups to the polyethersulfone membrane surface. This review includes reviews and discussions on modifying PES membranes by mixing, coating, and grafting methods. In particular, adding functional groups to polyethersulfone is a suitable method for introducing hydrophilic properties. The addition of nanomaterials to the surface of the polyethersulfone membrane by mixing, coating, grafting, and combinations significantly increases the surface of the membrane, and all modifications affect the surface roughness of the membrane.
Performance Evaluation of Bentonite/Nano-SiO2 Composite as Bleaching Earth in Crude Palm Oil Processing Agung Kurnia Yahya; Enny Nurmalasari; Apsari Puspita Aini; Hana Nikma Ulya
Jurnal Kimia Sains dan Aplikasi Vol 27, No 4 (2024): Volume 27 Issue 4 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.4.167-173

Abstract

In crude palm oil (CPO) processing industries, bleaching is important to remove unwanted impurities. Most industries use various bleaching earth with 0.8-2% w/v concentration during the bleaching process. As bleaching earth is single-used for the bleaching process, materials with higher adsorption ability are preferable to reduce the use of bleaching earth. This study aimed to evaluate the performance of bentonite/nano SiO2 composite (BE-SiO2) as bleaching earth in the bleaching process of CPO. The prepared BE-SiO2 was used in the bleaching process with various BE-SiO2 concentrations (0.1-1.3% w/v), process duration (0-2.5 hours), and process temperature (70-150°C). From the results, the rise in BE-SiO2 concentration during the CPO bleaching process initially led to a decrease in the β-carotene concentration, acid content, free fatty acids (FFA), and DOBI number up to 1% w/v of BE-SiO2. Subsequently, these parameters exhibited an increase with the addition of BE-SiO2. The bleaching process effectively reduced the β-carotene concentration, acid content, FFA, and DOBI number within the first 1.5 hours of operation. While a higher amount of β-carotene was adsorbed during the adsorption process at higher temperatures, the bleached palm oil (BPO) quality was compromised due to the heat. The results showed that the most effective condition of the bleaching process was performed with 1% w/v BE-SiO2 concentration for 1.5 hours at 90°C. From those conditions, the BPO had a β-carotene concentration of 312.311 ppm, water content of 0.112%, acid number of 0.0076, FFA of 4.864%, DOBI number of 1.311, and red/yellow of 1.5/15.
Pengolahan Limbah Cair Industri Tahu Menggunakan Teknologi Ultrafiltrasi Dengan Sistem Monitoring Berbasis Internet of Things N. H., Harmiwati; Yahya, Agung Kurnia; Luthfi, Muhammad Zulfikar; Nurmalasari, Enny; Permadani, Resi Levi; Aini, Apsari Puspita; Rahayu, Puji
Journal of Industrial Community Empowerment Vol 3, No 1 (2024): Published in April 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v3i1.253

Abstract

Waste from the tofu industry is a byproduct of the tofu production process that can have negative environmental impacts if not managed properly. CV. Dapur Tahu still discharges liquid waste directly into the river, posing a potential threat of river water pollution. Although a new reservoir and waste disposal channel are under construction, there is currently no effective waste treatment facility in place. To address this issue, a tofu wastewater treatment facility utilizing filtration technology is proposed due to its simplicity of operation, durability, and high efficiency in removing organic contaminants. The technology comprises a multi-stage filtration process involving sand filters (pumice, zeolite, and activated charcoal) combined with ultrafiltration membrane technology, complemented by a monitoring system consisting of TDS, pH, and temperature sensors. The multi-stage filtration process is capable of reducing TDS levels to 160 ppm, resulting in visibly clearer wastewater compared to the initial turbid white condition. The installation of IoT-based monitoring devices in the wastewater treatment process significantly aids in real-time water quality monitoring, accessible via mobile phone screens.
Evaluasi Indeks Tarik dan Indeks Sobek pada Bleaching Pulp: Pengaruh Hidrogen Peroksida (H2O2), Klorin Dioksida (ClO2) dan Suhu Ulia, Hasnah; Nurmalasari, Enny; Yahya, Agung Kurnia; Rahayu, Puji
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 1 (2024): Published in June 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i1.110

Abstract

Indonesia is one of the leading Pulp and paper producers globally, with an estimated annual growth rate of 3.5%. However, domestic production has not yet fully met the domestic needs and export demand for paper. Currently, hydrogen peroxide (H2O2) and chlorine dioxide (ClO2) are the primary bleaching agents used in Pulp and paper production. This research aims to evaluate the effects of H2O2, ClO2, and temperature on product quality parameters, specifically the tensile and tear indices. The variations of ClO2 used are 2%, 0.4%, and 0.7%; H2O2 concentrations are 0.1%, 0.2%, and 0.4%; and the temperatures used are 75°C and 85°C. The study found that the addition of ClO2 at a concentration of 0.7% resulted in the highest tensile index of 76.9 N.m/g and a tear index of 3.5 m.N.m²/g. The addition of H2O2 at a concentration of 0.1% resulted in a tensile index of 83.9 N.m/g and a tear index of 9.4 m.N.m²/g. Temperature variations did not significantly affect the tensile and tear indices, with the tensile index reaching 9.35 m.N.m²/g. The addition of H2O2 is essential as it enhances the bleaching process and improves the mechanical properties of the Pulp, which is beneficial for optimizing bleaching conditions to enhance product quality, thus meeting both domestic needs and export demands.
Co-Authors Achmad Yanuar Maulana Aini , Apsari Puspita Aini, Apsari Puspita Apsari Puspita Aini Apsari Puspita Aini Apsari Puspita Aini Eko Supriadi Enny Nurmalasari Ferry Ikhsandy Hana Nikma Ulya Harmiwati N. H Hasnah Ulia Hasnah Ulia Heratri, Agnes Hibrah Hibrah Hibrah Hibrah, Hibrah Kubikazari, Sinju Kusmiyati Kusmiyati Luthfi , Muhammad Zulfikar Miftahul Khairati Miftahurrahmah Miftahurrahmah, Miftahurrahmah Muhammad Zulfikar Luthfi N. H, Harmiwati N. H. , Harmiwati N. H., Harmiwati N.H, Harmiwati Nurmalasari , Enny Oktria, Dandi Permadani , Resi Levi Permadani, Resi Levi Puji Rahayu Puji Rahayu Purba, Ari Pranata Primisa Rahayu , Puji Renold Ramadhan Putra Romigo, Rivaldo Ronald Sukwadi Rosalina Rosalina Rosalina Sahaq, Anang Baharuddin Sri Kaidah Supriadi, Eko Surya, Dhanu Fransgio Pratama Tosty Maylangi Sitorus, Tosty Maylangi Ulia, Hasnah Yunita Fahni