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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Prima Medika Sains CHEMTAG Journal of Chemical Engineering
Mirnandaulia, Meutia
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Health Professions Medicine & Pharmacology Nursing Public Health

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Aktivitas antibakteri bakteri endofit daun kelapa sawit (Elaeis guineensis) terhadap Escherichia coli dan Staphylococcus aureus Harmileni, Harmileni; Saragih, Gimelliya; Hidayani, Tengku Rachmi; Mirnandaulia, Meutia
Jurnal Prima Medika Sains Vol. 5 No. 1 (2023): Juni
Publisher : Program Studi Magister Kesehatan Masyarakat Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/jpms.v5i1.3755

Abstract

Mikroorganisme endofit adalah mikroorganisme yang terdapat dalam jaringan tanaman dan memiliki kemiripan sifat senyawa bioaktif dengan tanaman inangnya. Daun kelapa sawit diketahui memiliki aktivitas antibakteri, tetapi penelitian mengenai aktivitas antibakteri bakteri endofitnya belum pernah dilaporkan. Tujuan penelitian ini adalah mengisolasi bakteri endofit dari daun kelapa sawit serta menentukan aktivitas antibakteri terhadap Escherichia coli dan Staphylococcus aureus. Delapan isolat bakteri endofit berhasil diisolasi dari daun kelapa sawit. Satu isolat termasuk bakteri Gram negatif dan tujuh isolat adalah bakteri Gram positif. Analisa morfologi menunjukkan satu isolat berbentuk basil dan yang lain berbentuk kokus. Uji antibakteri menunjukkan satu isolat (IDS18) menunjukkan aktivitas antibakteri yang kuat terhadap S.aureus dengan zona hambat 13 mm, tetapi tidak menunjukkan aktivitas antibakteri terhadap E. coli. Sementara lima isolat yaitu IDS1, IDS10, IDS11, IDS14 dan IDS16 menunjukkan aktivitas yang lemah terhadap E.coli, tetapi tidak memiliki aktivitas terhadap S.aureus. Hasil penelitian menunjukkan bahwa bakteri endofit daun kelapa sawit berpotensi sebagai penghasil senyawa antibakteri. Diperlukan penelitian lebih lanjut mengenai optimasi produksi senyawa bioaktif antibakteri serta karakterisasinya.
The Development of an IoT-Based Palm Solid Waste Counting System for Empty Fruit Bunches in the Palm Oil Industry Siregar, Emil Salim Parhimpunan; Mirnandaulia, Meutia; Hutajulu, Poltak Evencus; Hidayani, Tengku Rachmi; Marbun, New Vita Mey Dessty; Rachmiadji, Irwan; Hikmawan, Oksya; Hariyanto, Hariyanto; Tarigan, Enda Rasilta Br.; Simanjuntak, Andreas Rumata; Falah, Miftahul; Pardede, Erwin; Donda, Donda; Sitepu, Evi Christiani
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 10, No 4 (2024): December
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpkm.93563

Abstract

The recent application of palm empty fruit bunches as solid waste directly on soil or as organic fertilizer has enhanced palm farms. Moreover, the co-products of this palm oil mill constitute a dependable metric for assessing mill processing performance, specifically regarding quantity and weight. The quantity of palm empty fruit bunches is usually ascertained through manual counting using a hand counter during processing. The imprecision in calculating palm empty fruit bunches is a limitation of this method, as operators sometimes perform erroneous calculations, overlook quantities, and produce contradictory results for mill management. To address this issue, the sector requires enhanced execution of a monitoring and counting system methodology. The aim of this community service project is to create an empty fruit bunches count station using an IoTbased palm solid waste counting system for use in palm mills. The Ministry of Industry - Politeknik Teknologi Kimia Industri (PTKI) Medan will engage in and oversee the advancement of Industry 4.0 within the industrial sector. The initiative was executed at Tanah Gambus Estate in Batubara Regency, North Sumatra. Assistance was provided by a palm mill partner associated with PT. Socfin Indonesia. The implementation of the empty fruit bunches palm oil counting system was conducted efficiently, facilitating optimal operations, real–time online monitoring, uninterrupted functionality exceeding 24 hours daily, swift assessment of the empty fruit bunches volume, immediate identification of traditional counting inaccuracies by operators and management, and its station provides benefits to the palm industry.
The Potential of Spent Bleaching Earth In Charcoal Briquettes as Energy Source Tarigan, Enda Rasilta; Mirnandaulia, Meutia; Mustakim, Mustakim; Sitinjak, Anna Angela; Purba, Darry Christine Silowaty; Karo-Karo, Justaman Arifin; Silalahi, Meriahni; Fitri, Li Idi'il; Anwar, Dedy
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 2 (2025): July 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i2.380-392

Abstract

Eco-friendly alternative fuels encourage the use of waste biomass as a material for making briquettes. This study aimed to develop briquettes from rice husk biomass and peat moss and add spent leaching earth (SBE). SBE is a hazardous and toxic waste increasingly piling up in landfills. The research method involved carbonizing rice husks and peat moss, mixing them with SBE, molding with a 200 kg/cm2 Hydraulic Press, and drying. The resulting briquettes had an average water content of 5.86% and an ash content of 2.18%, which meet the SNI No. 01/6235/2000 standard. Morphological analysis revealed that the briquettes were round but exhibited non-homogeneous aggregation. The highest calorific value was found in C4 briquettes of 5030.17 cal/gr. The composition of C4 was 40% rice husk charcoal (4.8 g), 45% peat (5.4 g), and 15% SBE (1.8 g), with SBE dried for seven days. The addition of peat increased the calorific value of the briquettes. Based on scanning electron microscopy (SEM)/ energy-dispersive X-ray (EDX) analysis, the carbon content in the C4 briquettes reached 72.2%. This study shows that the combination of rice husk charcoal, SBE, and peat provides a renewable energy source and contributes to the reduction of environmental waste, thereby promoting sustainability. 
PENGURANGAN KADAR KARBONDIOKSIDA (CO2) DALAM BIOGAS DENGAN BIOFIKSASI MIKROALGA Chlorella vulgaris DAN Scenedesmus obliquus Anwar, Dedy; Panjaitan, Pestahariati; Situmorang, Ester Rina; Mirnandaulia, Meutia; Meldha, Zuqni
CHEMTAG Journal of Chemical Engineering Vol 4, No 2 (2023): CHEMTAG Journal of Chemical Engineering
Publisher : Universitas 17 Agustus 1945 (UNTAG) Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/cjce.v4i2.4432

Abstract

Biogas memiliki kandungan utama metana (CH4) sebesar 55-70% dan karbondioksida (CO2) sebesar 25-50%. Kadar CO2 yang tinggi dalam biogas dapat mengurangi nilai bakarnya. Salah satu teknik pengurangan kadar CO2 dalam biogas yaitu dengan biofiksasi menggunakan mikroalga. Biofiksasi merupakan penyerapan CO2 melalui proses fotosintesis. Tujuan penelitian ini adalah mengetahui tingkat penurunan kadar CO2 melalui biofiksasi menggunakan mikroalga, mengetahui pengaruh laju alir biogas dan jenis mikroalga terhadap penyerapan kadar CO2 dan mengetahui laju pertumbuhan mikroalga dalam proses biofiksasi untuk mengurangi kadar CO2 dalam biogas. Bahan baku yang digunakan dalam produksi biogas adalah eceng gondok dan kotoran sapi. Variasi laju alir biogas yang digunakan sebagai variabel pada proses pengurangan kadar CO2 oleh mikroalga ditentukan dari biogas yang terproduksi yaitu laju alir maksimum 6,85 mL/jam dan dua kali laju alir maksimum 13,7 mL/jam. Mikroalga yang digunakan yaitu Chlorella vulgaris dan Scenedesmus obliquus. Parameter yang diamati adalah kadar CO2 dalam biogas sebelum dan setelah biofiksasi, serta laju alir biogas. Pengurangan kadar CO2 dilakukan melalui tiga tahap, dimana penggunaan Scenedesmus obliquus memberikan hasil yang lebih tinggi dibandingkan dengan Chlorella vulgaris. Hasil pengurangan kadar CO2 dengan laju alir dua kali maksimum yaitu sebesar 68,8% oleh Scenedesmus obliquus dan sebesar 49% oleh Chlorella vulgaris.
Co-Authors ANWAR, DEDY Donda, Donda Fitri, Li Idi'il HARIYANTO HARIYANTO Harmileni Hikmawan, Oksya Hutajulu, Poltak Evencus Karo-Karo, Justaman Arifin Marbun, New Vita Mey Dessty Miftahul Falah Mustakim Mustakim Panjaitan, Pestahariati Pardede, Erwin Purba, Darry Christine Silowaty Rachmiadji, Irwan Saragih, Gimelliya Silalahi, Meriahni Simanjuntak, Andreas Rumata Siregar, Emil Salim Parhimpunan Sitepu, Evi Christiani Situmorang, Ester Rina Tarigan, Enda Rasilta Tarigan, Enda Rasilta Br. Tengku Rachmi Hidayani, Tengku Rachmi Zuqni Meldha