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Pradnya, Irene Nindita
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Engineering Health Professions Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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EFFECT OF PH AND ADSORBENT DOSES ON MN (II) METAL ADSORPTION IN THE KALIGARANG RIVER SEMARANG CITY USING SYNTHETIC COCONUT SHELL POWDERED ACTIVATED CARBON (PAC) Pradnya, Irene Nindita; Triwibowo, Bayu; Wulansarie, Ria; Hanifah, Ririn; Prakasita, Iffat Ganjar Fadhila
CENDEKIA EKSAKTA Vol. 8 No. 1 (2023)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/ce.v8i1.7578

Abstract

Kaligarang River is the largest river in the Semarang, which looks clear but actually containing Mn metal above the permitted threshold. Excessive presence of Mn metal can cause problems for human being, which can agglomerate inside the brain, liver, and kidneys.Moreover, it can lead to Parkinson's syndrome and damaging the central nervous system. The river water sample testing conducted at Tirta Moedal PDAM, Semarang; contaminated with heavy metal Mn of 1.075 mg/L. Based on Government Regulation No. 82 of 2001, the maximum allowable concentration of Mn in water is 0.1 mg/L. Adsorption with activated carbon is an effective and efficient method in processing Mn metal pollution. Activated carbon formed as powderis from coconut shell synthetic, with trademark Haycarb particle size of 500 microns. The adsorption process was carried out with a contact time of 90 minutes with a stirring speed of 210 rpm. The pH variables were pH 3, 7, and 12 and the adsorbent dose was 1, 5, 10 and 15 g /L. The adsorption results showed that the optimum conditions of the adsorption process occurred at pH 3 with an adsorbent dose of 15 g / L with percent absorption of manganese metal (Mn) of 87.18%.
Extractive Distillation of Ethanol/Water with 1-Butyl-3-Methylimidazolium Bromide Ionic Liquid as a Separating Agent: Process Simulation Hartanto, Dhoni; Handayani, Prima Astuti; Astuti, Widi; Kusumaningtyas, Ratna Dewi; Purwana, Yulian Candra; Maftukhaturrizqiyah, Maftukhaturrizqiyah; Wijayanti, Reni Titis; Wulansari, Durroti Zuhriah; Wulansarie, Ria; Pradnya, Irene Nindita; Hadikawuryan, Danang Subarkah; Wibowo, Agung Ari; Sholihin, Riza Mazidu; Chafidz, Achmad; Khoiroh, Ianatul
ASEAN Journal of Chemical Engineering Vol 23, No 3 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.72250

Abstract

Ethanol purification has become of great interest recently because ethanol can be used as renewable energy, solvent in many industries, and for medicinal purposes. The separation of ethanol from water is challenging because the azeotropic point has appeared in this binary mixture. Extractive distillation technology is one of the most interesting methods to separate ethanol from water due to the competitiveness of its energy consumption and capital investment costs. Ionic liquids such as 1-butyl-3-methylimidazolium bromide [BMIM] [Br], categorized as a green solvent, produce a significant salting-out effect in the ethanol-water system. This makes ionic liquid a promising solvent in ethanol-water separation. This study simulated the extractive distillation of an ethanol-water system with 1-butyl-3-methylimidazolium bromide as a solvent. The simulation and sensitivity analysis were performed on the Aspen Plus Process Simulator to obtain the optimum configuration. The NRTL thermodynamic model was used in this study. The effects of the number of stages (NS), binary feed stage (BFS), entrainer feed stage (EFS), and reflux ratio (RR) on the ethanol concentration with minimum energy requirements were studied. The most optimal configurations to produce a high ethanol concentration with less energy are NS 28, BFS 22, EFS 4, and RR 1.5.
Pendampingan Pembuatan Biobriket Dari Pemanfaatan Sumber Daya Lokal Limbah Sabut Kelapa di Desa Kemujan Karimunjawa Kusumaningrum, Maharani; Pradnya, Irene Nindita; Wulansarie, Ria; Zakia, Maulida; Bahlawan, Zuhriyan Ash Shiddieqy; Imani, Nadya Alfa Cahaya; Permanadewi, Indrasukma; Salsabila, Luvena; Suwandi, Luluk Arvi Cahyaning; Wati, Afifah Sagita Fitria; Syahputra, Adhika Bintang; Fandika, Putri Maharani Adinda; Pramitha, Deva Aurelya; Pratama, Muhammad Herdi; Diana, Savira Rahma; Sadan, Serlia Fitri; Imanullah, Kautsar Taqi
Dedikasi:Jurnal Pengabdian kepada Masyarakat Vol. 5 No. 1 (2024): Jurnal Dedikasi
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/dedikasi.v5i1.360

Abstract

Abstrak Desa Kemujan, yang terletak di Kecamatan Karimunjawa, memiliki potensi besar dalam memanfaatkan limbah sabut kelapa sebagai bahan baku biobriket. Dengan luas wilayah 162,1 km² dan populasi 3.391 jiwa, desa ini memiliki keberagaman budaya dan suku yang kaya. Limbah sabut kelapa yang terdapat di Desa Kemujan pada saat ini belum dimanfaatkan secara optimal. Hal ini terjadi karena minimnya kesadaran dan pengetahuan masyarakat sekitar untuk mengolah sabut kelapa tersebut. Sabut kelapa merupakan biomassa yang dapat dimanfaatkan sebagai bahan alami pembuatan biobriket. Sehingga pengabdian melalui pendampingan dan pelatihan pembuatan biobriket untuk memanfaatkan sumber daya lokal sabut kelapa di Desa Kemujan Karimunjawa perlu diselenggarakan. Metode pelaksanaan yang dilakukan dalam pengabdian ini adalah sosialisasi terkait biobriket dan pelatihan pembuatan biobriket dari sabut kelapa secara langsung. Hasil yang didapat dari pengabdian ini adalah meningkatkan nilai guna dan nilai ekonomis sabut kelapa, berkontribusi pada pengembangan UMKM di Desa Kemujan, serta meningkatkan kesadaran dan pengetahuan masyarakat terkait pemanfaatan limbah sabut kelapa serta proses pembuatan biobriket dari sabut kelapa. Keywords: Biobriquettes; Coconut Husk; Waste
EFFECT OF PH AND ADSORBENT DOSES ON MN (II) METAL ADSORPTION IN THE KALIGARANG RIVER SEMARANG CITY USING SYNTHETIC COCONUT SHELL POWDERED ACTIVATED CARBON (PAC) Pradnya, Irene Nindita; Triwibowo, Bayu; Wulansarie, Ria; Hanifah, Ririn; Prakasita, Iffat Ganjar Fadhila
CENDEKIA EKSAKTA Vol. 7 No. 2 (2022)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/ce.v7i2.7594

Abstract

Kaligarang River is the largest river in the Semarang, which looks clear but actually containing Mn metal above the permitted threshold. Excessive presence of Mn metal can cause problems for human being inside the brain (Parkinson's syndrome), liver, and kidneys. The aim of the study was to analyze the effect of the adsorbent dose and the pH of the solution containing Mn metal. The river water sample was tested at Tirta Moedal PDAM, Semarang; contaminated 1.075 mg/L heavy metal Mn. Based on Government Regulation No. 82 of 2001, the maximum allowable concentration of Mn in water is 0.1 mg/L. Adsorption with activated carbon is an effective method in processing Mn metal pollution. Activated carbon formed as powder from coconut shell size of 500 microns. The adsorption process was with a contact time of 90 minutes and a stirring speed of 210 rpm. The pH variables were pH 3, 7, and 12 and the adsorbent dose was 1, 5, 10 and 15 g /L. The adsorption results showed that the optimum conditions of the adsorption process occurred at pH 3 with an adsorbent dose of 15 g / L with percent absorption of Mn metal of 87.18%. Keywords: Activated carbon, Adsorption, Manganese
Formulation of Solid Soap Preparation from Used Cooking Oils with Pineapple Peel Eco-enzyme Salsabila, Luvena; Pradnya, Irene Nindita; Maulana, Ivan; Diana, Savira Rahma; Amalia, Annisa
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 3 (2025): June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i3.15337

Abstract

This study explores the formulation and quality evaluation of solid soap made from recycled cooking oil enriched with fermented Ananas comosus (pineapple) peel extract. Three formulations were prepared using varying concentrations of pineapple peel eco-enzyme, while maintaining consistent proportions of palm sugar and water. The soap samples underwent physicochemical characterization in accordance with Indonesian National Standards (SNI). Results showed that all formulations had pH values within the acceptable range. Moisture content met regulatory limits in two formulations. All samples exhibited good foam stability, although the free fatty acid content exceeded permissible levels, likely due to extended hydrolysis during processing. Organoleptic assessment revealed uniform cream coloration, a characteristic aroma resembling soybean milk that decreased with higher eco-enzyme concentrations, and increased astringency corresponding to the concentration of pineapple extract. The soap maintained a solid texture with varying degrees of tackiness. This research demonstrates the potential for converting household waste into value-added products, while highlighting the need for further optimization to ensure compliance with commercial quality standards.
SOSIALISASI PEMBUATAN SABUN MINYAK JELANTAH DAN CUCI TANGAN DI SD PETOMPON 3 Pradnya, Irene Nindita; Astuti, Widi; Wulansarie, Ria; Fitri, Amelia; Wijaya, Anggit; Pramesti, Amadea Vaskallya
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 5 No. 4 (2024): Volume 5 No. 4 Tahun 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v5i4.27133

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengedukasi siswa mengenai perilaku hidup bersih dan sehat, sosialisasi mengenai bahaya minyak jelantah dan pengolahan minyak jelantah, serta pembelajaran kewirausahaan sejak dini. Mitra dalam kegiatan pengabdian ini adalah siswa SD Petompon 3 Sampangan kelas 5 dan 6. Berdasarkan hasil survey di SD Petompon 3 Sampangan, permasalahan yang dihadapi mitra adalah kondisi penerapan Perilaku Hidup Bersih dan Sehat (PHBS) di SD N Petompon 3 sangat kurang. Warga sekolah, terutama siswa minim pengetahuan mengenai PHBS. Keterbatasan pengetahuan berdampak pada kondisi lingkungan sekitar yang kurang sehat. Salah satu kondisi lingkungan yang harus dibenahi adalah selokan sekitar sekolah yang digunakan untuk membuang minyak jelantah yang berpotensi mencemari lingkungan dan berdampak negatif bagi kesehatan. Dalam rangka mengatasi permasalah ini, tim pengabdian berinisiasi mengadakan solusi untuk melaksanakan program edukasi guna menumbuhkan kesadaran PHBS, melalui aksi sosialisasi pemurnian minyak jelantah hingga pemanfaatan menjadi sabun kertas. Selanjutnya, untuk memberikan dampak lebih signifikan tim pengabdian akan melaksanakan program edukasi kewirausahaan pemasaran sabun kertas bagi siswa. Diharapkan program ini dapat dilaksanakan secara berkelanjutan dan dapat dipublikasikan sebagai referensi bagi gerakan pengabdian selanjutnya sehingga kebermanfaatan program-program dapat dirasakan secara luas bagi masyarakat.
Training Dimensions Independence in Students Phase A P5 Activity at Marsudirini Elementary School The Place of Semarang Hartutik, Hartutik; Astuti, Andarweni; Pradnya, Matilda Stella; Setyaningsih, Mayang; Pradnya, Irene Nindita; Sukestiyarno, YL
Jurnal Abdimas Vol. 28 No. 1 (2024): June 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ty20ht52

Abstract

The purpose of this community service activity is to provide independence training to Phase A students in grades 1 and 2 of Marsudirini Elementary School, Gedangan, Semarang. The training material is intended to teach aspects of self-independence by practicing a good work culture. This activity reflects the development of the independent dimension of the Pancasila Student Profile in the Pancasila Student Profile Strengthening Project (P5). There are six P5 themes at the elementary school level, namely sustainable lifestyle, local wisdom, Bhinneka Tunggal Ika, Build Your Soul and Body, Engineering and Technology, and Entrepreneurship, all of which aim to develop children's potential as a whole, starting from cognitive, affective, psychomotor to social emotional aspects. The method of implementing this service is lectures, Q&A/discussions and practices. The results of this service activity are the knowledge and skills of Phase A students in grades 1 and 2 of Marsudirini Elementary School, Gedangan, Semarang in helping to overcome themselves in simple things, especially in terms of knowledge of first aid in accidents, can be understood and practiced independently and can reduce fear and panic. 
IoT - AI Mentoring and Diffusion in the Development of Digital-Based Teaching Devices for PAK Teachers Hartutik, Hartutik; Jay, Dewi Ratna; Pradnya, Matilda Stella; Pradnya, Irene Nindita; Sukestiyarno, YL
Jurnal Abdimas Vol. 29 No. 1 (2025): June 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/3rhzkt80

Abstract

Education teacher religion Catholic (PAK) becomes part in system education in Indonesia which follow play a role important in improvement quality education . Improvement self with adapt technology in this 5.0 era become matter important . At this time Still There is difficulty PAK teachers in Semarang City in adapt progress technology especially the Internet of Things (IoT) and Artificial Intelligence (AI). Purpose devotion public This For spread knowledge ( diffusion ) and skills in leveraging IoT and AI in to design device teach education religion Catholic . Activities devotion public This implemented in School St. Francis Catechetical Pastoral College ( STPKat ) Semarang Assisi with amount participants 22 PAK teachers consists of from Elementary, Middle, and High School/Vocational High School teachers in Semarang City. Methods Which applied in devotion is method lecture , with material base law And document church Which support use Internet For kindness His creation , method discussion And ask answer done with method give example And step search application compile device teach PAK with method practice direct search And making in a way independent . Evaluation activity done with give questionnaire pretest -posttest through application Kahoot . Results activity This show existence improvement understanding , knowledge , and skills before And after given diffusion And mentoring utilization of IoT and AI in compile device teach education religion Catholic by 29.31 points .
PENERAPAN SMART FARMING MAGGOT BSF DALAM MENDORONG KUALITAS AYAM UNGGUL Pradnya, Irene Nindita; Zakia, Maulida; Sukestiyarno, Yohanes Leonardus; Enjelita, Anggun; Emyu, Dalnius; Maulana, Ivan
JMM (Jurnal Masyarakat Mandiri) Vol 9, No 2 (2025): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v9i2.30036

Abstract

Abstrak: Desa Karangkobar di Kendal memiliki lingkungan alam yang subur, menjadikannya tempat yang cocok untuk peternakan ayam. Ketersediaan pakan alami, udara bersih, dan kualitas air yang baik mendukung kesehatan ternak. Masalah pada Tini Farm, mitra peternakan mikro dalam program ini, hanya terdapat 6 pekerja berpendidikan dasar. Peternak ayam masih mengandalkan pakan konvensional (pur) yang rendah protein dan berisiko mengandung zat berbahaya. Alternatif seperti maggot BSF memiliki nutrisi tinggi dan ramah lingkungan, tetapi budidayanya terkendala teknologi, media wadah, serta suhu dan kelembaban yang kurang optimal untuk pertumbuhannya. Tujuan pengabdian adalah penerapan smart farming maggot BSF yang meningkatkan kualitas ayam siap dijual dalam 1–3 bulan antara 125-200 ekor ayam per siklus serta keterampilan mitra dalam pemantauan pertumbuhan maggot berbasis IoT. Metode pelaksanaan koordinasi dengan 6 peternak Tini Farm di Desa Karangkobar, konstruksi, praktik, serta pendampingan penggunaan advanced technology maggot cultivation dan automatic feeder berbasis IoT terutama penerapan suhu optimal (30–36°C) dan kelembaban (60–70%). Sosialisasi meliputi instalasi, kontrol suhu dan kelembaban, serta monitoring real-time. Evaluasi dilakukan melalui wawancara serta kuesioner sebanyak 15 pertanyaan, dengan pendampingan lanjutan selama 3–6 bulan. Hasil survei menunjukkan 72,2% masyarakat tertarik mengenai budidaya maggot sedangkan dalam evaluasi lanjutan 60,6% masyarakat mengalami peningkatan produksi dari budidaya maggot BSF. Teknologi ini mampu menekan biaya produksi dan meningkatkan daya saing peternak.Abstract: Karangkobar Village in Kendal has a fertile natural environment, making it an ideal location for poultry farming. The availability of natural feed, clean air, and highwater quality supports livestock health. However, Tini Farm, a micro-scale poultry farming partner in this program, faces several challenges. It only employs six workers with basic education, and the farmers still rely on conventional feed (pur), which is low in protein and may contain harmful substances. Alternative feeds like BSF maggots offer high nutritional value and are environmentally friendly, but their cultivation is limited by technology, container media, as well as suboptimal temperature and humidity conditions. This program aims to implement smart farming using BSF maggots to enhance chicken quality, enabling sales within 1–3 months, producing 125–200 chickens per cycle. It also focuses on improving farmers' skills in IoT-based maggot growth monitoring. Implementation includes coordination with six poultry farmers at Tini Farm, construction, practical training, and assistance in using advanced maggot cultivation technology and IoT-based automatic feeders. Training covers installation, temperature and humidity control, and real-time monitoring. Evaluation involved interviews and a 15-question questionnaire, followed by 3–6 months of additional assistance. Results show 72.2% of the community is interested in maggot farming, with 60.6% increasing production. This technology reduces costs and boosts competitiveness.
INOVASI PAKAN LELE BERBASIS DIGITAL FARMING MAGGOT BSF SEBAGAI UPAYA PENINGKATAN KEBERLANJUTAN PADA SISTEM BUDIDAYA SKALA UMKM Zakia, Maulida; Pradnya, Irene Nindita; Astuti, Widi; Sukestiyarno, Yohanes Leonardus; Ardana, Grandis Belva; Athif, Rona Najma; Dryandi, Rayyan Akmal; Saputra, Vito Ardino
JMM (Jurnal Masyarakat Mandiri) Vol 10, No 1 (2026): Februari
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v10i1.36935

Abstract

Abstrak: Sektor budidaya ikan lele berpotensi ekonomi tinggi, namun usaha mikro, kecil, dan menengah (UMKM) sering terbebani biaya pakan konvensional dan keterbatasan manajemen produksi. Pengabdian ini bertujuan meningkatkan efisiensi UMKM “Lele Mandiri” (melibatkan 10 pelaku usaha) dengan mengembangkan pakan berbasis maggot Black Soldier Fly (BSF) dan menerapkan sistem budidaya maggot inovatif serta automatic fish feeder berbasis Internet of Things (IoT). Metode pelaksanaan meliputi koordinasi, sosialisasi, pelatihan, workshop teknis, serta praktik lapangan yang melibatkan 10 peserta dari mitra UMKM Lele Mandiri. Evaluasi dilakukan melalui observasi langsung, penyebaran kuesioner, dan analisis produktivitas. Hasil menunjukkan peningkatan bobot ikan lele dari 200 g menjadi 300 g dan penurunan biaya pakan hingga 45%. Selain itu, antusiasme masyarakat terhadap budidaya maggot meningkat 90%, dan efisiensi produksi UMKM naik sebesar 70%. Dengan demikian, integrasi sistem pakan berbasis sirkular ekonomi dan IoT terbukti efektif meningkatkan daya saing dan keberlanjutan usaha budidaya lele skala UMKM.Abstract: The catfish aquaculture sector holds significant economic potential; however, micro, small, and medium enterprises (MSMEs) continue to face challenges in production efficiency due to the high cost of conventional feed and limited knowledge in production management. This community engagement program aims to develop BSF maggot-based catfish feed while enhancing the capacity of the Lele Mandiri MSME through the implementation of an innovative maggot farming system and an Internet of Things (IoT)-based automatic fish feeder. The implementation methods included coordination, socialization, training, technical workshops, and field practice involving participants from the Lele Mandiri MSME partner. Evaluation was conducted through direct observation, questionnaire distribution, and productivity analysis. The results indicated an increase in catfish weight from 200 g to 300 g and a 45% reduction in feed costs. Furthermore, community interest in maggot cultivation increased by 90%, and production efficiency improved by 70%, reflecting enhanced economic value and strengthened technological capacity toward sustainable aquaculture.
Co-Authors Agung Ari Wibowo Amelia Fitri Annisa Amalia Ardana, Grandis Belva Astuti, Andarweni Athif, Rona Najma Bahlawan, Zuhriyan Ash Shiddieqy Bayu Triwibowo Chafidz, Achmad Dhoni Hartanto Diana, Savira Rahma Dryandi, Rayyan Akmal Emyu, Dalnius Enjelita, Anggun Fandika, Putri Maharani Adinda Hadikawuryan, Danang Subarkah Hartutik (Hartutik) Heni Pujiastuti Imani, Nadya Alfa Cahaya Imanullah, Kautsar Taqi Jay, Dewi Ratna Khoiroh, Ianatul Maftukhaturrizqiyah, Maftukhaturrizqiyah Maharani Kusumaningrum Maulana, Ivan Maulida Zakia Permanadewi, Indrasukma Pradnya, Matilda Stella Prakasita, Iffat Ganjar Fadhila Pramesti, Amadea Vaskallya Pramitha, Deva Aurelya Pratama, Muhammad Herdi Prima Astuti Handayani Purwana, Yulian Candra Ratna Dewi Kusumaningtyas Ria Wulansarie, Ria Riza Mazidu Sholihin Sadan, Serlia Fitri Salsabila, Luvena Saputra, Vito Ardino Setyaningsih, Mayang Sukestiyarno Sukestiyarno Suwandi, Luluk Arvi Cahyaning Syahputra, Adhika Bintang Wati, Afifah Sagita Fitria Widi Astuti Wijaya, Anggit Wijayanti, Reni Titis Wulansari, Durroti Zuhriah