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All Journal JURNAL KIMIA SAINS DAN APLIKASI CHEMICA Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Jurnal Litbang Industri MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering REACTOR : Journal of Research On Chemistry And Engineering Warta AKAB Jurnal Teknologi Kimia Unimal Journal of Industrial Community Empowerment SAINTI: Majalah Ilmiah Teknologi Industri Journal Of Chemical Process Engineering
Enny Nurmalasari
Politeknik ATI Padang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Rubber Industry Wastewater Treatment Using A Combination Of Ozonation And Modified PES-Nano ZnO Membranes Enny Nurmalasari; Tutuk Djoko Kusworo; Miftahul Khairati
CHEMICA: Jurnal Teknik Kimia Vol 9, No 3 (2022): December 2022
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v9i3.24658

Abstract

Until now, the application of a combination of biological, physical, and chemical methods to eliminate contaminants from the rubber industry wastewater has not been reported. The purpose of our investigation is to analyze the use of membrane techniques and the effect of pre-treatment of industrial rubber wastewater—pre-treatment by ozone on the performance of the modified PES-nano ZnO membrane. Modified PES-nano ZnO membranes were made with phase inversion techniques and membrane performance based on flux and rejection. Filtration processes with cross-flow filtration systems and ozonation time variations were 1, 2, 3 hours. The ozonation process influenced membrane rejection. The membrane rejection value increased to 89.6%, and ammonia decreased to 4.3 mg/L. The flux value increased to 10.2 L.M-2.h-1 in 1h Ozonatian and decreased with the increasing of filtration time. Pre-treatment with ozonation can increase membrane selectivity and extend membrane life during the filtration process due to reduced fouling. The pre-treatment process time with 3 hours-ozonation was the most violent rejection even though the flux value has decreased
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.
Ekstraksi minyak atsiri kayu gaharu (Aquilaria malaccensis Lam.) dengan pretreatment fermentasi menggunakan Rhizopus sp. Hasnah Ulia; Harmiwati NH; Jerry Jerry; Enny Nurmalasari
Jurnal Litbang Industri Vol 13, No 2 (2023)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24960/jli.v13i2.7919.129-135

Abstract

Minyak gaharu adalah atsiri yang digunakan dalam bidang kosmetik, farmasi, dan pewangi yang berkontribusi sebanyak 20% ekspor minyak gaharu dunia. Tujuan penelitian adalah melihat pengaruh pretreatment dengan fermentasi terhadap nilai rendemen ekstraksi kayu gaharu. Pretreatment sebelum maserasi dengan cara fermentasi menggunakan Rhizopus sp. selama 1, 2 dan 3 hari. Maserasi kemudian dilanjutkan menggunakan waktu dan pelarut terbaik. Pelarut yang digunakan adalah etanol, metanol, n-heksan, dan etil asetat dengan waktu maserasi 1, 2, dan 3 jam. Analisis senyawa minyak kayu gaharu menggunakan GCMS. Berdasarkan nilai rendemen bahwa pelarut terbaik adalah etanol dan waktu maserasi 2 jam yang digunakan untuk ekstraksi dengan pretreatment fermentasi. Durasi fermentasi terbaik yaitu 2 hari dengan komposisi 1:11, menghasilkan nilai rendemen 4,18±0,1254% setelah maserasi menggunakan pelarut etanol selama 2 jam. Karakterisasi GCMS menjelaskan perubahan senyawa dan pembentukan senyawa, asam 1,3-Benzoxazole-5-carboxylic yang sebelum fermentasi 39,84% dan setelah fermentasi menjadi 5,79%. Senyawa lainnya adalah 4-Hydroxy-2-butanon yang tidak ada sebelum fermentasi, namun muncul setelah fermentasi sebesar 46,82%. Jumlah senyawa setelah fermentasi meningkat menjadi 78, dibandingkan sebelum fermentasi, hasil tersebut menjelaskan bahwa kualitas minyak gaharu meningkat.
Produksi Asam Laktat Melalui Jalur Biologi dan Jalur Kimia Katalitik Menggunakan Berbagai Bahan Baku Aini, Apsari Puspita; Nurmalasari, Enny; Rasrendra, Carolus Borromeus; Sitompul, Johnner
Eksergi Vol 20, No 3 (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.v20i3.9768

Abstract

Aplikasi asam laktat pada berbagai industri menarik minat para peneliti untuk memproduksi asam laktat melalui berbagai jalur reaksi. Perolehan isomer asam lakat yang lebih murni dibandingkan dengan jalur reaksi kimia katalitik menjadikan jalur biologi dengan fermentasi menjadi jalur reaksi yang banyak dipakai di industri. Berbagai mikroorganisme pada golongan Lactic Acid Bacteria telah digunakan untuk memproduksi asam laktat baik dalam skala laboratorium maupun skala industri. Berbagai bahan baku dapat dikonversi menjadi asam laktat seperti, dihidroksi aseton, gliseraldehid, piruvaldehid, xilosa, glukosa, fruktosa, sukrosa, selulosa, insulin, selobiosa, pati, levoglukosan dan lignoselulosa. Kemampuan katalis dalam metode kimiawi menarik banyak minat peneliti untuk mencari alternatif pembuatan asam laktat yang bisa mengkonversi gula menjadi asam laktat dengan waktu reaksi yang lebih singkat. Penggunaan berbagai katalis mulai dari katalis homogen dan heterogen terbukti dapat menghasilkan asam laktat dengan yield yang bervariasi. Katalis lanthanum triflate terlihat menghasilkan asam laktat dengan perolehan yang baik walaupun dari bahan baku lignoselulosa yang perlu perlakuan awal terlebih dahulu karena mempunyai senyawa lignin yang bisa menghalangi kerja katalis.Kata Kunci: asam laktat; kimia katalitik; fermentasi; lignoselulosa  ABSTRACT: The utilization of lactic acid for various applications encourages researchers to produce lactic acid by various reaction pathways. The yield of lactic acid isomer which is purer than the catalytic chemical reaction makes the biological pathway by fermentation widely used in industry. Various microorganisms in the Lactic Acid Bacteria categories have been used to produce lactic acid both on a laboratory and industrial scale. Various raw materials can be converted into lactic acid such as dihydroxy acetone, glyceraldehyde, pyruvaldehyde, xylose, glucose, fructose, sucrose, cellulose, insulin, cellobiose, starch, levoglucosan and lignocellulose. The ability of catalyst has attracted interest of researcher to find alternatives for making lactic acid that can convert sugar into lactic acid with a shorter reaction time. The use of various catalysts from homogeneous and heterogeneous catalysts has been proven to produce lactic acid with varying results. The lanthanum triflate catalyst proven to produce lactic acid with a high yield, even though it is from lignocellulosic raw materials that need pre-treatment to remove lignin compounds which can inhibit the performance of the catalyst.Keywords: lactic acid; chemical catalytic; fermentation;  lignocellulose  
PERBANDINGAN RENDEMEN EKSTRAKSI KECOMBRANG (Etlingera elatior) MENGGUNAKAN METODE MASERASI DAN SOKLETASI Nurmalasari, Enny; Miftahurrahmah, Miftahurrahmah; Nurillahi, Resi; Cahyani, Luthfi Nazwa Andya
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 20, No 2 (2023): VOL 20 NO 2 DESEMBER 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v20i2.242

Abstract

Torch ginger (Etlingera elatior) contains secondary metabolites that have antibacterial potential. The production of torch ginger extract in Indonesia is still limited. However, market demand increase because pharmaceutical industry is starting to use the torch ginger extract. Furthermore, the growing utilization of torch ginger will enhance the economy of torch ginger farmers. This study aims to compare the extraction efficiency of maceration and soxhletation methods in obtaining bioactive compounds from torch ginger using ethanol, methanol and n-hexane as solvents. The results showed that in the maceration method, ethanol solvent produced the highest yield of 15%, methanol 7% and n-hexane 3%. In soxhletation method, ethanol and methanol solvents produced yields of 15% and 13% respectively, higher than n-hexane only 1%. Overall, soxhletation method with ethanol solvent was the best condition for torch ginger extraction. GC-MS characterization showed the presence of bioactive compounds such as 2-Chloropropionic acid, Boric acid trimethyl ester, Silane dimethoxymethyl and Octadecanoic acid methyl ester which contribute to the antibacterial activity in torch ginger essential oil.
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.
Fermentasi Kopi Robusta Dengan Lactococcus lactis subsp. Untuk Meningkatkan Kualitas Rasa Kopi Nurmalasari, Enny; Kusmiyati, Kusmiyati; Yahya, Agung Kurnia; Heratri, Agnes; Kubikazari, Sinju
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.157

Abstract

Fermentation in coffee provides new modulation to the taste and sensory profile of coffee, thereby enhancing its flavor quality. Lactic Acid Bacteria (LAB) strains are used for fermentation in the wet process and have been proven to improve the overall flavor of the coffee. Therefore, in this study, coffee fermentation will be carried out using Lactococcus lactis subsp. to improve coffee flavor quality. The study begins with preparing the starter medium, starter culture, and fermentation. Subsequently, proximate analysis and a cupping test are conducted to assess the flavor profile of the coffee. The results of this study show that coffee fermentation can increase the number of LAB with longer fermentation times. Furthermore, proximate results indicate that fermented Robusta coffee contains 7.86% less fat compared to non-fermented Robusta coffee, which has 15.02% fat. The cupping test results for fermented Robusta coffee reveal a total score of 81, with the clean cup and uniformity aspects scoring 10. This total is higher than that of non-fermented Robusta coffee, thus proving that fermentation using Lactococcus lactis subsp. can improve coffee flavor quality.
Co-Authors Aini, Apsari Puspita Apsari Puspita Aini Apsari Puspita Aini Apsari Puspita Aini Baroza, Andika Cahyani, Luthfi Nazwa Andya Chairunnisak, Aula Dennis Farina Nury Hana Nikma Ulya Harmiwati NH Hasnah Ulia Hasnah Ulia Heratri, Agnes Jerry Jerry Khairati, Miftahul Kubikazari, Sinju Kusmiyati Kusmiyati Maulana, Akmal Maulana, Ihsan Mesa, Nazwa Ananda Miftahul Khairati Miftahurrahmah Miftahurrahmah, Miftahurrahmah Muhammad Zulfikar Luthfi N. H., Harmiwati Nurillahi, Resi Permadani, Resi Levi Puji Rahayu Putra, Reski Lediyo Rasrendra, Carolus Borromeus Ronald Sukwadi Selfa Dewati Samah Sitompul, Johnner Tutuk Djoko Kusworo Ulia, Hasnah Yahya , Agung Kurnia Yahya, Agung Kurnia Yunita Fahni