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All Journal CHEMICA Jurnal Teknik Kimia Eksergi Journal of Industrial Community Empowerment SAINTI: Majalah Ilmiah Teknologi Industri
Enny Nurmalasari
POLITEKNIK ATI PADANG
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Economics, Econometrics & Finance Energy Engineering Environmental Science Industrial & Manufacturing Engineering

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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.
PENGARUH PERBEDAAN PELARUT TERHADAP PROSES EKSTRAKSI BATANG SEREH (Cymbopogon citratus) Miftahurrahmah Miftahurrahmah; Enny Nurmalasari; Reski Lediyo Putra; Ihsan Maulana; Aula Chairunnisak
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 20, No 1 (2023): VOL 20 NO 1 JUNI 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v20i1.202

Abstract

The abundant benefits of essential oils have led to a significant increase in demand, prompting researchers to continuously explore this field to achieve optimal results. Various extraction methods can be employed to obtain essential oils. In this study, researchers used the maceration method with variations in several solvents as comparators. The resulting maceration filtrate was subsequently distilled to obtain pure essential oil, aiming to find an efficient process for essential oil production and identify the most suitable solvent for the production process. The solvents used were Methanol, Ethanol, n-Hexane, and Water. During the maceration method, a sample of 150 g lemongrass was prepared with a size of 1 cm and soaked in 1 L of solvent in a closed container for 24 hours. The filtrate was then distilled to obtain a pure product, which was further characterized using GC-MS. The research findings showed that essential oil was extracted most effectively by ethanol solvent, yielding 23.31 g, and the GC-MS analysis indicated that the lemongrass oil contained 25.75% Geraniol. It was concluded that Geraniol is more soluble in ethanol due to its closer polarity to the compounds within lemongrass oil, resulting in a higher yield compared to extractions using other solvents.
Produksi Asam Laktat Melalui Jalur Biologi dan Jalur Kimia Katalitik Menggunakan Berbagai Bahan Baku Apsari Puspita Aini; Enny Nurmalasari; Carolus Borromeus Rasrendra; Johnner Sitompul
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  
Co-Authors Apsari Puspita Aini Apsari Puspita Aini Aula Chairunnisak Carolus Borromeus Rasrendra Hasnah Ulia Hasnah Ulia Ihsan Maulana Johnner Sitompul Miftahul Khairati Miftahurrahmah Miftahurrahmah Muhammad Zulfikar Luthfi Reski Lediyo Putra Tutuk Djoko Kusworo Yahya, Agung Kurnia Yunita Fahni