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All Journal Prosiding Semnastek IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) ALCHEMY Jurnal Penelitian Kimia Jurnal Distilasi WIDYA LAKSANA Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Jurnal Inovator Barometer Jurnal Abdimas Mandiri Best Journal (Biology Education, Sains and Technology) Jurnal Abdi Insani AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Aptekmas : Jurnal Pengabdian Kepada Masyarakat PROSIDING SEMINAR NASIONAL PENELITIAN DAN PENGABDIAN KEPADA MASYARAKAT (SNPPM) UNIVERSITAS MUHAMMADIYAH METRO Integrasi : Jurnal Ilmiah Teknik Industri Bulletin of Chemical Reaction Engineering & Catalysis International Journal of Information Engineering and Science
Eka Sri Yusmartini
Universitas Muhammadiyah Palembang
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Proses Pembentukan Struvite Kristal Menggunakan Sampah Organik Melalui Proses Anaerobik Ariyanto, Eko; Septiaranisi, Eci Dwi; Martini, Sri; Yusmartini, Eka Sri
Prosiding Semnastek PROSIDING SEMNASTEK 2024
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh penambahan Effective Microorganisms-4 (EM-4) pada proses anaerobik limbah organik terhadap peningkatan konsentrasi ammonium (NH4) serta mengevaluasi penambahan ion Magnesium (Mg) dan Pospat (PO4) terhadap penurunan konsentrasi ion NH4 dalam proses pembentukan struvite. Meskipun telah ada penelitian sebelumnya mengenai pengaruh penambahan ion Mg dan PO4 dalam pembentukan struvite, namun penelitian yang secara khusus memperhatikan pengaruh penambahan EM-4 masih terbatas. Penelitian ini menggunakan limbah organik, kotoran sapi, dan EM-4 dalam proses anaerobik untuk menghasilkan peningkatan konsentrasi NH4, yang kemudian digunakan untuk pembentukan struvite dengan penambahan ion Mg dan PO4, serta dianalisis menggunakan SEM dan EDX. Hasil penelitian menunjukkan bahwa penambahan EM-4 sebesar 60 ml dalam proses anaerobik limbah organik menghasilkan peningkatan konsentrasi NH4 yang signifikan dari 97 mg/L hingga 350 mg/L. Pada Proses pembentukan struvite kristal menunjukkan bahwa penambahan ion Mg dan ion PO4 memiliki efek yang signifikan dalam penurunan konsentrasi NH4 hingga mencapai 53,6 mg/L dan meningkatkan kemurnian struvite yang dihasilkan yaitu 65%. Analisis Scanning Electron Microscope (SEM) dan Energy Dispersive X-Ray Analysis EDX memberikan gambaran tentang hasil pembentukan struvite dan keberadaan pengotor dalam struvite. Penelitian ini memberikan kontribusi dalam pemahaman tentang pengaruh penambahan EM-4, ion Mg, dan ion PO4 dalam pembentukan struvite melalui proses anaerobik limbah organik, serta menekankan pentingnya penelitian lebih lanjut untuk pemahaman yang lebih baik dalam pengolahan limbah organik secara efektif dan berkelanjutan.Kata kunci: Anaerobik, limbah organik, Effective Microorganisms-4 (EM4), struvite
Analysis Corrosion Rate Carbon Steel by Mg Anode and Na2Cr2O7 in Musi River Water Media Komaini, M Ali; Ariyanto, Eko; Sri Yusmartini, Eka; Oktaviansyah, Ikbal
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 21 No. 2 (2024): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v21i2.16731

Abstract

This study aims to analyze and optimize the effect of Mg anode and sodium dichromate sacrificial protection on the corrosion rate of carbon steel in Musi River water media. The research involved carbon steel pipes (½ inch, 1 cm length) with an ID of 18.20 mm and OD of 18.80 mm. Four variables were tested: A (no corrosion prevention), B (Na2Cr2O7), C (Mg anode), and D (Na2Cr2O7 with Mg anode), each immersed in 150 ml of Musi River water for periods of 20, 30, 40, 50, and 60 days. Results showed the highest pH drop in variation A, where the initial pH of 6.87 decreased to 4.13 after 60 days. Variation A also showed the greatest increase in Fe concentration, rising from 1.47 mg/L to 4.89 mg/L, and turbidity from 80.8 NTU to 88.3 NTU after 60 days. Corrosion rate analysis indicated that carbon steel without corrosion prevention had the highest corrosion rate, reaching 0.0000025746 mpy after 60 days. In comparison, carbon steel with Na2Cr2O7 and Mg anode protection exhibited significantly lower corrosion rates. These findings highlight carbon steel pipes without corrosion protection experience higher degradation in Musi River water, while sodium dichromate and Mg anode treatments effectively reduce corrosion.
PENYULUHAN PEMBUATAN KOMPOS DARI LIMBAH RUMAH TANGGA MENGGUNAKAN KOMPOSTER DI KELURAHAN KEBUN BUNGA PALEMBANG Mardwita, Mardwita; Yusmartini, Eka Sri; Kalsum, Ummi; Rifdah, Rifdah; Angkasa, Zuber
JURNAL WIDYA LAKSANA Vol 7 No 2 (2018)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jwl.v7i2.12897

Abstract

Meningkatnya jumlah sampah dilingkungan masyarakat memberikan dampak negatif bagi kesehatan masyarakat, seperti masalah kesehatan dan polusi udara (bau) yang dihasilkan oleh sampah. Sampah organik seperti sayur-sayuran dan buah-buahan yang telah membusuk dan banyak dihasilkan dari rumah tangga dapat diolah menjadi pupuk kompos. Tujuan dari pengabdian masyarakat ini adalah untuk mengajarkan pada masyarakat khususnya ibu rumah tangga untuk dapat memisahkan antara sampah organik dan anorganik dan selanjutnya dapat mengolah sampah organik tersebut menjadi pupuk kompos. Pengomposan sampah organik tersebut menggunakan komposter dan Effective Microorganism 4 (EM4). Hasil pengomposan berupa pupuk kompos padat dan cairan lindi. Cairan lindi dapat digunakan kembali sebagai biang dan dapat digunakan sebagai pupuk cair tanaman. 
SOSIALISASI PENGOLAHAN LINDI MENJADI PUPUK CAIR DI TPS-3R KELURAHAN TALANG KELAPA KECAMATAN ALANG-ALANG LEBAR PALEMBANG SUMATERA SELATAN Yusmartini, Eka Sri; Mardwita, Mardwita; Fahmi, Innike Abdillah
JURNAL WIDYA LAKSANA Vol 10 No 1 (2021)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.682 KB) | DOI: 10.23887/jwl.v10i1.27968

Abstract

Meningkatnya pertumbuhan penduduk  dan aktifitasnya, memberi kontribusi significan pada peningkatan sampah. Bank Sampah merupakan usaha masyarakat bersama dengan pemerintah memiliki fungsi sebagai media edukasi bagi masyarakat bagaimana memelihara lingkungan dan mengelola sampah Metode yang digunakan dalam program kemitraan masyarakat (PKM) adalah dengan pendekatan terhadap mitra untuk memberikan pandangan tentang perlunya diversifikasi produk untuk pengolahan lindi. Diversifikasi produk dengan memberikan sosialisasi mengolah lindi yang dihasilkan dari proses pengomposan menjadi pupuk cair yang juga dapat dimanfaatkan sebagai EM4 dalam proses pengomposan. Pemasangan alat yang sudah diterapkan pada TPS 3 – R, lindi yang dihasilkan terkumpul dengan baik dan akan dapat digunakan untuk pemrosesan lanjut menjadi pupuk cair.
Pendampingan dan Pelatihan Web Pemasaran Berbasis On-Line Di SMA Negeri I Tanjung Raja Yusmartini, Eka Sri; Mardwita; Aseptianova
JURNAL WIDYA LAKSANA Vol 11 No 2 (2022)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (512.012 KB) | DOI: 10.23887/jwl.v11i2.40041

Abstract

Menumbuhkan minat dan jiwa entrepreneur dapat ditanam sejak di bangku sekolah. Dengan mendaur ulang sampah organik yang dihasilkan oleh sekolah menjadi pupuk kompos dan menjualnya menjadi salah satu upaya melahirkan entrepreneur muda. Tim Pengabdian UM Palembang bermitra dengan SMA Negeri 1 Tanjung Ogan Ilir dalam memberikan keterampilan dasar menjadi entrepreneur, tidak hanya kepada siswa tetapi juga guru pendamping, yaitu keterampilan dalam membuat website sebagai sarana promosi dan penjualan serta keterampilan mendesain label produk agar mampu menarik perhatian pembeli. Metode pelaksanaan kegiatan pengabdian ini adalah pra-pelaksanaan, pelaksanaan dan evaluasi. Hasil dari kegiatan ini adalah peningkatnya pengetahuan siswa dan guru pendamping terhadap pembuatan website untuk memasarkan produk, pelabelan produk serta adanya website SMANTRA01 dengan menggunakan platform Google Site dan label produk SMANTRA 01 Kompos sebagai hasil pendampingan.
Addition of Plastic Mixture (LDPE) for the Development of Alternative Mixtures in Concrete Blocks Abdullah, Abdullah; Erna Yuliwati; Eka Sri Yusmartini
International Journal of Information Engineering and Science Vol. 2 No. 3 (2025): August : International Journal of Information Engineering and Science
Publisher : Asosiasi Riset Teknik Elektro dan Infomatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/ijies.v2i3.301

Abstract

This study investigates the potential of Low-Density Polyethylene (LDPE) plastic waste as a partial substitute for sand in concrete block mixtures, focusing on its effects on compressive strength and water absorption. LDPE is a non-biodegradable plastic waste that poses significant environmental challenges. Its incorporation into construction materials offers a promising solution to reduce pollution while enhancing the performance of building components. The research employed LDPE substitution levels of 10%, 15%, 20%, 25%, and 30% by weight of sand, compared against conventional concrete blocks without LDPE. Experimental results revealed that the highest compressive strength was achieved with a 15% LDPE mixture, reaching 80.762 kg/cm² at 28 days of curing—an increase of approximately 40.8% compared to normal blocks, which recorded 57.359 kg/cm². LDPE additions up to 20% maintained favorable strength characteristics, while higher proportions (25% and 30%) led to a decline in mechanical performance. In terms of water absorption, the inclusion of LDPE demonstrated a decreasing trend, attributed to the hydrophobic nature of plastic, which enhances moisture resistance in the concrete blocks. These findings suggest that a 15% LDPE substitution represents an optimal formulation for producing eco-friendly concrete blocks with improved strength and reduced water absorption. The study highlights the dual benefits of waste management and material innovation, aligning with sustainable development goals. By repurposing plastic waste into construction applications, this approach not only mitigates environmental impact but also contributes to the advancement of green building technologies. Further research is recommended to explore long-term durability, thermal properties, and scalability of LDPE-based concrete products in real-world construction settings.
Pemanfaatan Sampah Organik Rumah Tangga Menjadi Cairan Serba Guna dengan Proses Fermentasi di Panti Asuhan Humairoh Palembang Yusmartini, Eka Sri; Kharismadewi, Dian; Atikah; Rahadianto, Wahyu Triaji
Jurnal Abdimas Mandiri Vol. 9 No. 2
Publisher : UNIVERSITAS INDO GLOBAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36982/jam.v9i2.5820

Abstract

Sampah masih menjadi masalah utama di lingkungan, karena jumlah timbunan sampah yang dihasilkan sehari hari dari aktivitas masyarakat. Timbunan sampah pada TPA semakin hari semakin meningkat, kegiatan pengabdian masyarakat ini bertujuan untuk membangun kesadaran tentang pentingnya mengolah sampah organik menjadi cairan serba guna yang dapat digunakan sehari hari dengan memanfaatkan sampah organik. Kegiatan dilakukan di Panti Asuhan Aisyiyah Humairoh, kota Palembang yang diikuti oleh 27 peserta. Eco enzym adalah produk pemanfaatan sampah organik rumah tangga (kulit buah, sisa sayuran) yang masih segar yang difermentasi dengan gula merah atau bisa juga menggunakan molase, dalam wadah kedap udara selama 3 bulan, sampai menjadi larutan aktif. Bahan bahan nya terdiri dari air, gula merah atau molase, dan sampah dari kulit buah serta sayuran. Metode Sosialisasi dan Pelatihan dilakukan dengan dimulai dari persiapan, pretest, pelaksanaan pelatihan dan posttest. Peserta kegiatan berperan aktif dalam kegiatan baik dalam sosialisasi maupun pelatihan.  Evaluasi dilakukan sebelum dan sesudah kegiatan untuk mengetahui tingkat wawasan peserta terkait sosialisasi dan pelatihan yang dipaparkan.  Hasil kegiatan menunjukkan bahwa pemahaman peserta meningkat sebesar 100 % dari semula tidak paham dan kurang paham.   Hasil dari eco enzyme dapat dipanen setelah 3 bulan proses fermentasi. Setelah kegiatan peserta dibagikan produk eco enzyme yang dapat dipakai untuk kebutuhan sehari hari seperti mengepel dan menyiram tanaman. Hal ini dimaksudkan agar peserta dapat merasakan manfaat dari eco enzyme yang diolah menggunakan sampah organik. Pengetahuan masyarakat akan nilai tambah sampah dengan mengolahnya menjadi eco enzyme bertambah, dan diharapkan selanjutnya bisa mandiri membuatnya, baik dilingkungan panti asuhan maupun diluar panti asuhan.
Pengaruh Berat Karbon Aktif Dari Ampas Tebu dan Lama Perendaman Terhadap Kualitas Minyak Goreng Bekas Mardwita; Eka Sri Yusmartini; Nindia Selviana
Jurnal INOVATOR Vol. 5 No. 1 (2022): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v5i1.148

Abstract

The amount of used cooking oil is increasing along with human activities. Used cooking oil that is disposed directly into the environment will give a negative impact on health and the quality of the environment, therefore it is necessary to purify the used cooking oil so that the used cooking oil can be reused. In this study, used cooking oil that has been used with heating time of 3 hrs, 5 hrs, and 7 hrs was used. The used cooking oil was purified using activated carbon made from 100 mesh bagasse with variations in weight of 2.5 g, 5 g, and 7 g, soaking time of activated carbon in used cooking oil were 24 hrs, 48 ​​hrs, and 72 hrs. The analysis used is the analysis of water content, free fatty acid content, and the amount of saponification. The results showed that the water content and saponification rate decreased with the length of contact time and the weight of activated carbon. The lowest free fatty acid content was produced when using activated carbon 7.5 g and contact time for 24 hrs.
Analysis of Heat Transfer on the Effect from Mineral Crust in Evaporator Semi-Kestner Quintuple Effect Triaji, Rahadianto Wahyu; Yusmartini, Eka Sri Yusmartini; Mardwita, Mardwita
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 6 No. 3 (2022)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v6i3.125

Abstract

Indonesia as a large population country has the potential to become one of the largest consumers of sugar in the world. Indonesia's national sugar needs amounted to 3.2 million tons per year while domestic production was around 2 million tons. In the sugar industry, the benefits of evaporator tools are to thicken clear juice whose dissolved solid number is 7 - 11 oBrix into a thickened syrup with a dissolved solid of 55 - 60 oBrix, this process occurs through the process of evaporation of water content contained in the material. In one sugar factory, the type of evaporator used is a Semi-Kestner Evaporator with the quintuple effect principle. One of the biggest challenges of evaporators is the decrease in heat value of the evaporator due to the onset of mineral crust that inhibits heat transfer. On September 7th, 2021 Q evaporator 1 is at 135874.8 Kw and on October 26th, 2021 Q evaporator 1 is at 121399.2 Kw. Based on the results of data observations on the evaporator carried out in September 2021 and October 2021, it can be concluded that the decreased heat transfer will cause the evaporator's performance in evaporating water from the sap material (clean juice) so that the material flow rate is getting bigger. Efforts that can be made to overcome this are to carry out mechanical cleaning or chemical cleaning per 28 days of the grinding process, to remove crusts on the tube calandria evaporator.
Egg Shells as an Adsorbent for the Adsorption of Lead (Pb) and Iron (Fe) Metals Yusmartini, Eka Sri Yusmartini; Mardwita, Mardwita; Atikah, Atikah; Kaswari, Suli Cahaya
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 8 No. 1 (2024)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v8i1.349

Abstract

An eggshell is estimated to have around 10,000–20,000 pores; this condition created a chance for the eggshells to be used as an adsorbent. This research aims to activate egg shells used as an adsorbent. Egg shells were applied as an adsorbent in solutions of lead (Pb) and iron (Fe). Test parameters for adsorption capacity were carried out on the optimum mass and absorption contact time with lead (Pb) and iron (Fe) while using the eggshell waste as an adsorbent. The adsorbent quality of egg shells was tested using parameters such as ash content, water content, and adsorption capacity towards methyl blue. This research aims to utilize egg shells as an adsorbent to absorb lead (Pb) and iron (Fe) content using an adsorption process. There are 3 stages of a method for this research to establish: adsorbent preparation, adsorbent activation, and the adsorption process. The adsorption process was carried out with variations of the mass sample, which are 0.75 grams, 1 gram, 1.25 grams, 1.50 grams, and 2 grams and time variations when contact occurred in 20, 30, 40, 50, and 60 minutes. The outcome of this research showed that the highest adsorption capacity at the optimum mass of Pb metal was 1.5 grams at 98.914% and for Fe metal at 96.386%. The highest adsorption capacity results were influenced by Pb metal contact time in 40 minutes, which was 99.30%, and the best capacity for adsorption of Fe metal was at a contact time in 50 minutes, which was 99.82%.
Co-Authors Abdullah Abdullah Ario Oktora Aseptianova Aseptianova Aseptianova Aseptianova Aseptianova Aseptianova Aseptianova Atikah Atikah Atikah Atikah Atikah Bima Anugrah Eko Ariyanto Elfidiah Elfidiah Martini Elvidiah Elvidiah Fatimah Feby Ardianto Gusmiatun Gusmiatun Hery Gunawan Ikbal Oktaviansyah Innike Abdillah Fahmi Junanda Marza Kaswari, Suli Cahaya Kharismadewi, Dian Komaini, M Ali Mardwita Mardwita Martini Meylinda Rahayu Mitayani Purwoko Muhammad Dzaky Muzhaffar Muhammad Faizal Mujiharti, Mujiharti - Nidya Wisudawati Nindia Selviana Noka, Isara Abda Oktaviansyah, Ikbal Parwanti, Sri Rahadianto Wahyu Triaji Rifdah, Rifdah Rifdah, Rifdah Rinjani, Retno - Rivaldo, M. Chobind Robiah Robiah Rurry Patradhiani Septiaranisi, Eci Dwi Sri Martini Sri Martini Suli Cahaya Kaswari Sulton Nawawi Thoufiq Ridhowan Wahyu Triaji Rahadianto Yasmin Yuliwati, Erna Zuber Angkasa