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All Journal International Journal of Advances in Applied Sciences Abdimas Jurnal Bahan Alam Terbarukan Eksergi: Chemical Engineering Journal Prosiding Semnastek IJEMS (Indonesian Journal of Environmental Management and Sustainability) CHEESA: Chemical Engineering Research Articles Jurnal Abdi Insani MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Indonesia Berdaya Equilibrium Journal of Chemical Engineering Prosiding Seminar Nasional dan Call Paper STIE Widya Wiwaha Indonesian Journal of Chemical Engineering
Dhias Cahya Hakika
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Jln. Prof. Soedarto, Tembalang, Semarang, 50239, Telp/Fax: (024)7460058
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IoT-Based Monitoring System for Temperature and pH Control in Cocoa Fermentation Sabila, Liya Yusrina; Dwiyono, Linggar Rahmat; Hakim, Agus Rahman; Karuana, Abi Nazli; Hakika, Dhias Cahya
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 7 No 1 (2025): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v7i1.381

Abstract

Cocoa fermentation plays a crucial role in cocoa bean production, as it directly influences the taste, aroma, and texture of the final product. Temperature and pH significantly impact microbial activity during fermentation, making their control essential for achieving optimal and consistent results. A promising solution is the implementation of an IoT-based system for temperature regulation and pH monitoring, allowing for real-time data tracking throughout the fermentation process. This study developed a cocoa fermentation box integrated with an IoT system, utilizing a DHT22 temperature sensor and a 4502C pH sensor for precise monitoring. The system enables real-time data access and remote control, improving efficiency and quality while transforming conventional manual observation methods into a standardized, data-driven approach. IoT technology facilitates rapid condition adjustments and predictive analysis, minimizing human error and reducing the risk of fermentation inconsistencies. The experimental results demonstrated high sensor accuracy, with the IoT system successfully enhancing efficiency, control, and cocoa bean quality. In the 1 kg cocoa test, temperatures ranged from 28℃ to 35℃, with pH values between 4.0 and 5.3. In the 10 kg experiment, temperatures on the second day ranged from 28℃ to 33℃ with pH values between 4.3 and 5.9, while on the third day, temperatures ranged from 28℃ to 32℃, with pH values stabilizing between 4.0 and 5.3.
Pengelolaan Sampah Plastik menjadi Ecobrick sebagai Solusi Pendidikan Berkelanjutan pada Siswa Taman Kanak-Kanak (Management of Plastic Waste into Ecobricks as a Solution for Sustainable Education in Kindergarten Students) Asih, Hayati Mukti; Hakika, Dhias Cahya; Biddinika, Muhammad Kunta
Indonesia Berdaya Vol 6, No 2 (2025)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.20251017

Abstract

ABSTRACTPermasalahan sampah plastik di Indonesia telah menjadi isu lingkungan yang mendesak, terutama karena pengelolaan sampah yang tidak optimal. Sampah plastik yang sulit terurai menyebabkan pencemaran lingkungan, termasuk mikroplastik di ekosistem laut, serta mengancam kesehatan masyarakat. TK Cahya Mentari sebagai bagian dari komunitas pendidikan memerlukan intervensi untuk meningkatkan kesadaran dan keterampilan dalam pengelolaan sampah plastik. Program Pengabdian kepada Masyarakat (PkM) ini dirancang untuk membekali guru dengan pengetahuan dan keterampilan praktis dalam mengolah sampah plastik menjadi ecobrick, mengkreasikan ecobrick menjadi produk, sekaligus mengintegrasikan pembelajaran berbasis lingkungan ke dalam kurikulum anak usia dini. Tujuan program ini adalah meningkatkan pemahaman guru tentang dampak sampah plastik, melatih keterampilan pembuatan ecobrick dan diversifikasi produknya, serta mendorong penerapan pembelajaran keberlanjutan di kelas. Hasil dari program menunjukkan peningkatan signifikan pada pengetahuan dan keterampilan guru, dengan lebih dari 95% peserta mampu memahami konsep pengelolaan sampah dan mempraktikkan pembuatan ecobrick. Selain itu, para guru berhasil mengimplementasikan aktivitas berbasis lingkungan di kelas, yang meningkatkan kesadaran siswa terhadap pentingnya menjaga kebersihan dan mengelola limbah sejak usia dini. Program ini tidak hanya memberikan solusi konkret untuk mengurangi sampah plastik tetapi juga menciptakan ekosistem pembelajaran yang mendukung keberlanjutan. Manfaatnya meluas tidak hanya pada peningkatan kapasitas guru, tetapi juga dalam menanamkan nilai-nilai lingkungan pada generasi muda. Keberhasilan program ini membuka peluang untuk replikasi dan pengembangan lebih lanjut di sekolah lain, serta kolaborasi dengan komunitas lokal untuk menciptakan dampak yang lebih besar.  Abstract. The issue of plastic waste in Indonesia has become a pressing environmental concern, particularly due to suboptimal waste management practices. Non-biodegradable plastic waste leads to environmental pollution, including microplastics in marine ecosystems, and poses a threat to public health. Cahya Mentari Kindergarten, as part of the educational community, requires intervention to enhance awareness and skills in plastic waste management. This Community Service Program (PkM) is designed to equip teachers with practical knowledge and skills in processing plastic waste into ecobricks, creating products from ecobricks, and integrating environmental-based learning into the early childhood curriculum. The objectives of this program are to improve teachers' understanding of the impacts of plastic waste, train them in ecobrick production skills and product diversification, and encourage the implementation of sustainability education in the classroom. Results from the program indicate a significant increase in teachers' knowledge and skills, with over 95% of participants able to comprehend waste management concepts and practice ecobrick production. Additionally, teachers successfully implemented environmental-based activities in the classroom, raising students' awareness of the importance of cleanliness and waste management from an early age. This program not only provides a concrete solution to reduce plastic waste but also creates a learning ecosystem that supports sustainability. Its benefits extend beyond enhancing teachers' capacities to instilling environmental values in the younger generation. The success of this program opens opportunities for replication and further development in other schools, as well as collaboration with local communities to create a greater impact.
Metal Adsorption in Batik Liquid Waste Using Adsorbents from Duck Eggshell and Durian Skin Waste Huda, Muhammad Farkhan Fikri; Mustopa; Aktawan, Agus; Hakika, Dhias Cahya
Indonesian Journal of Chemical Engineering Vol. 3 No. 1 (2025)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/ijce.v3i1.1419

Abstract

If industrial factory waste is directly disposed of into the surrounding environment, it can cause pollution, damaging the areas affected by the waste. Therefore, it is necessary to process the waste to reduce the harmful substances contained in the waste. This study conducted an experiment to reduce the metal content in batik liquid waste (Cu and Cd) using duck egg shells and durian peels as adsorbents. Before the production of activated charcoal, the duck egg shells and durian skins were washed and then sun-dried. Next, the duck egg shells are crushed into small granules, and the durian skins are cut into small pieces to facilitate carbonization. The carbonization process is carried out using a device called a furnace at a temperature of 600 °C for 2 hours for duck egg shells, and 300 °C for 1 hour for durian peels. Then, the obtained charcoal is ground and sieved using a 140 mesh sieve, followed by activation using a 4 N H3PO4 solution for 24 hours. The adsorption process is differentiated based on variations in contact time of 30, 90, and 180 minutes as the independent variable in the study, with adsorbent weight and stirring speed as the constant variables. After being analyzed using atomic absorption spectrophotometry, a reduction in Cu metal content by 27% and Cd metal content by 19% was obtained. The pH decreased from 13 to 10.
Energy efficient direct transesterification of Nannochloropsis sp. using hydrodynamic cavitation Nirmalasari, Jiran; Setyawan, Martomo; Jamilatun, Siti; Pitoyo, Joko; Hakika, Dhias Cahya
International Journal of Advances in Applied Sciences Vol 14, No 2: June 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i2.pp394-405

Abstract

The increasingly limited supply of fossil fuels requires renewable fuel as an alternative source. Nannochloropsis sp. is a microalgae species containing a lipid content of between 12 and 53%, which can be converted to biofuel as an alternative source of fossil fuels through a transesterification process. Up to this date, the literature has reported no studies on biodiesel production from Nannochloropsis sp. via direct transesterification with catalyst using hydrodynamic cavitation. The direct transesterification process introduced 7.5 g of microalgae, 40 ml of methanol, 90 ml of hexane, and 0.0225 g of sodium hydroxide into the sample chamber. These mixtures were passed within the cavitation using a pressure driver and transformed into fatty acid methyl ester (FAME). The catalytic hydrodynamic cavitation method produces a higher extract yield than the stirring one. Regarding the FAME composition, the catalytic hydrodynamic cavitation method is dominated by saturated fatty acid (palmitic), while the stirring catalytic method is dominated by monounsaturated fatty acid (oleic). The hydrodynamic cavitation method provides a lower average degree of unsaturation and shorter chain length than the stirring catalytic method.
Educational and Outreach Initiatives to Support Community-Based Waste Management for a Sustainable Environment in Dech Charoen Village, Thailand Aktawan, Agus; Rahayu, Aster; Biddinika, Muhammad Kunta; Hakika, Dhias Cahya; Areeprasert, Chinnathan
Indonesia Berdaya Vol 6, No 3 (2025)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.20251194

Abstract

The rapid rise in urbanization and waste production has significantly impacted the environment. Therefore, community-based waste management is a crucial approach for reducing the environmental impact of domestic and household waste. This community service project aims to promote environmental sustainability through community-based education on waste management. This initiative was carried out in Dech Charoen Village, Thailand, aiming to increase community awareness about the importance of sustainable waste management practices. This paper discusses the community service activities conducted in Dech Charoen Village and their impact on community empowerment and environmental sustainability. The activities included a sharing session on community-based waste management, outreach on the reduce, reuse, and recycle (3R) principle for inorganic waste, and practical outreach on processing organic waste using a composting machine. Results showed a considerable rise in awareness of waste management methods, with more than 90% of participants achieving a better understanding of waste segregation, recycling, composting practices, and the importance of community involvement.
Kajian Teknologi Material Maju untuk Pengolahan Ion Sulfat pada Limbah Cair Industri Sari, Hutri Puspita; Rahayu, Aster; Hakika, Dhias Cahya
Prosiding Semnastek PROSIDING SEMNASTEK 2025
Publisher : Universitas Muhammadiyah Jakarta

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

Abstract

Pencemaran ion sulfat menjadi masalah serius dalam lingkungan, terutama akibat aktivitas industri seperti pertambangan dan pengolahan mineral. Tingginya konsentrasi sulfat dapat merusak kualitas air dan kesehatan manusia. Tujuan dari artikel ini adalah untuk mengevaluasi efektivitas material maju dalam menghilangkan ion sulfat dari air limbah. Metode yang digunakan mencakup studi literatur yang komprehensif, dengan fokus pada berbagai material seperti nanomaterial, komposit, dan resin penukar ion yang telah terbukti efektif dalam penghilangan sulfat. Hasil penelitian menunjukkan bahwa penggunaan ettringit dan polialuminum chloride (PAC) dapat mencapai efisiensi penghapusan sulfat hingga 90%. Selain itu, material seperti hidrokalumite dan resin penukar ion juga menunjukkan potensi yang signifikan. Kesimpulan dari penelitian ini menegaskan bahwa pemilihan material yang tepat dan pengaturan kondisi operasional, seperti pH dan waktu kontak, sangat berpengaruh terhadap efisiensi penghilangan sulfat. Oleh karena itu, penggunaan material maju menawarkan solusi yang lebih berkelanjutan untuk mengatasi pencemaran sulfat dalam industri, sekaligus mendukung pengelolaan air limbah yang lebih efektif dan ramah lingkungan. Artikel ini diharapkan dapat memberikan wawasan baru untuk praktik pengolahan air yang lebih baik di masa depan.
EDUKASI PENGOLAHAN DAN PEMILAHAN SAMPAH PLASTIK GUNA PENINGKATAN EKOLITERASI ORANG TUA SISWA TK CAHYA MENTARI Hakika, Dhias Cahya; Asih, Hayati Mukti; Biddinika, Muhammad Kunta; Yuwantina, Anissa; Safitri, Anggi; Sugianti, Ardina Fitri
Jurnal Abdi Insani Vol 11 No 4 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i4.2013

Abstract

Garbage is identified as objects or materials that are no longer deemed necessary, useful, or wanted, and are often disposed of by individuals or communities. Various sources and categories of garbage and waste exist, which, without proper management, could contaminate soil, water, and air. Implementing educational programs on waste management is crucial to boost community awareness and involvement in mitigating the detrimental effects on environmental and public health. Particularly, enhancing parental awareness of waste is essential for cultivating environmental stewardship in young children. This community service initiative aims to educate parents, especially those of students at TK Cahya Mentari in Semarang District, on the processing and sorting of primarily plastic waste to improve their eco-literacy. The program includes a series of educational and technical guidance sessions that introduce fundamental waste management principles, effective sorting techniques, and the adoption of eco-friendly practices in daily life. This intervention is intended to enable parents to incorporate these practices into domestic routines and to instil environmental consciousness in their children. This program resulted in a significant increase in knowledge, with parents’ understanding improving from 53% to 91.33%. The results from this initiative indicate that the educational efforts have successfully enhanced parental understanding of waste management, thereby contributing to the development of environmental awareness among children at TK Cahya Mentari.
Pemanfaatan Ampas Kelapa Hasil Dapur Rumah Tangga Menjadi Pangan Olahan Rahmadewi, Yunda Maymanah; Hakika, Dhias Cahya; Sulistiawati, Endah; Salamah, Siti; Amelia, Shinta
Indonesia Berdaya Vol 4, No 4 (2023)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.2023561

Abstract

Coconut dregs often become waste and garbage due to the lack of knowledge and skills of the community in utilizing the existing potential. Even though, coconut dregs still contain fiber which is good for the body. Activities using educating and training methods aimed to increase the knowledge and skills of the community in processing coconut dregs into processed food. Educating can increase participants' knowledge by 28.33 points. Training on processing sago cheese (sagu keju) from coconut dregs flour can improve skills in products that need to be equipped with a brand so that they have competitiveness in the market.
Pembuatan Serbuk Fikobiliprotein dari Spirulina platensis melalui Proses Freezing-Thawing dan Freeze-Drying Mazareta, Selva; Sulistiawati, Endah; Evitasari, Rachma Tia; Setyawan, Martomo; Hakika, Dhias Cahya
Eksergi Vol 21 No 3 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i3.12453

Abstract

Mikroalga golongan Cyanophyta seperti Spirulina Platensis (SP) merupakan salah satu sumber makanan fungsional yang bergizi. SP mengandung senyawa fikobiliprotein (PBP) yang merupakan komponen terbesar dari protein dan berfungsi sebagai antioksidan dan antikanker. Penelitian ini bertujuan untuk mengetahui pengaruh perbandingan solven-biomassa (S/B), waktu pengeringan beku, dan luas permukaan wadah sampel pada pengeringan beku terhadap serbuk PBP yang dihasilkan. Eksperimen diawali dengan proses perendaman SP kering (1,5 dan 3 g) selama 1 jam, pembekuan selama 24 jam, thawing, penyaringan vakum (30-90 menit) dan pengeringan beku (freeze-drying) pada filtrat yang diperoleh. Analisis konsentrasi PBP dalam filtrat dilakukan dengan mengukur absorbansinya menggunakan UV-Vis Spektrofotometer diuji pada panjang gelombang 562, 615, dan 652 nm.  Kadar air pada serbuk PBP setelah dilakukan proses freeze-drying diukur secara gravimeteri. Variasi yang dilakukan meliputi perbandingan S/B (6,67-133,33) mL air suling/g SP kering. Variasi waktu freeze drying selama 24 dan 32 jam. Waktu optimum untuk penyaringan vakum 30,55 menit dan menghasilkan konsentrasi PBP tertinggi (7,639 g/L). Nilai S/B optimum didapatkan  sebesar 20 mL/g dengan rendemen 112,32 mg/g (SP kering). Luas permukaan wadah sampel pada pengeringan beku yang terbaik adalah 427,5 cm2 dan banyaknya air yang teruapkan sebesar 99,71% dari berat filtrat
Revitalisasi Kebun Edukatif melalui Budidaya Tanaman Herbal untuk Mewujudkan Ketahanan Pangan dan Ekonomi Sirkular Berbasis Komunitas [Revitalizing Educational Park through Herbal Plant Cultivation to Support Community-Based Food Security and Circular Economy] Hakika, Dhias Cahya; Asih, Hayati Mukti; Rosyady, Phisca Aditya; Andriansyah, Revaldo; Wijaya, Kenedy; Auliya, Ayu Intan Afiani; Aulia, Viola Lulu
Indonesia Berdaya Vol 7, No 1 (2026)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.20261424

Abstract

Food security is one of the key strategic issues in sustainable development, particularly at the local community level, which is vulnerable to food crises and climate change. To address this challenge, this community service activity was conducted with the aim of improving knowledge and skills among community members, especially local farmer groups in cultivating herbal plants as a strategy for local food resilience and the implementation of a circular economy at Kebun Dakwah Muhammadiyah Yogyakarta. The cultivated commodities include ginger, aromatic ginger (kencur), turmeric, temulawak, and lemongrass, all of which have high potential as raw materials for value-added herbal products. The educational program was designed using a participatory approach, involving lectures, hands-on training, and mentoring by a multidisciplinary team of lecturers and students from Universitas Ahmad Dahlan’s KKN (Community Service Program). The training covered land preparation, seed selection, eco-friendly cultivation techniques, and post-harvest product processing education to support the circular economy concept. Evaluation results showed a significant increase in participants’ understanding of the benefits of herbal plants (increasing 29%) and cultivation techniques (increasing 30%). This initiative also supports the optimization of existing post-harvest technologies such as solar dryers, while strengthening the circular economy ecosystem in the area. Abstrak. Ketahanan pangan merupakan salah satu isu strategis dalam pembangunan berkelanjutan, khususnya di tingkat komunitas lokal yang rentan terhadap krisis pangan dan perubahan iklim. Untuk menjawab tantangan ini, kegiatan pengabdian kepada masyarakat ini dilaksanakan dengan tujuan meningkatkan pengetahuan dan keterampilan masyarakat khususnya kelompok petani komunitas dalam membudidayakan tanaman herbal sebagai bagian dari strategi ketahanan pangan lokal dan implementasi ekonomi sirkular di Kebun Dakwah Muhammadiyah Yogyakarta. Komoditas yang dibudidayakan meliputi jahe, kencur, kunyit, temulawak, dan sereh wangi yang memiliki potensi tinggi sebagai bahan baku produk olahan herbal bernilai tambah. Program edukasi dirancang melalui pendekatan partisipatif dengan metode penyuluhan, pelatihan praktik langsung, dan pendampingan oleh tim dosen lintas disiplin dan mahasiswa Kuliah Kerja Nyata (KKN) Universitas Ahmad Dahlan. Edukasi dilakukan mulai dari penyiapan lahan, pemilihan bibit, teknik budidaya ramah lingkungan, hingga edukasi pengolahan produk pascapanen sebagai implementasi konsep ekonomi sirkular. Hasil evaluasi menunjukkan adanya peningkatan signifikan dalam pemahaman peserta terhadap manfaat tanaman herbal sebanyak 29% dan teknik budidayanya sebesar 30%. Kegiatan ini juga mendukung optimalisasi teknologi fasilitas pascapanen yang telah ada di lokasi pengabdian seperti rumah pengering, sekaligus memperkuat ekosistem ekonomi sirkular di kawasan tersebut.
Co-Authors Agus Aktawan, Agus Amelia, Shinta Amilia Amilia, Amilia Amillia, Amillia Andriansyah, Revaldo Areeprasert, Chinnathan Asih, Hayati Mukti Aulia, Viola Lulu Auliya, Ayu Intan Afiani Caraka Putra Bhakti Chusna, Firda Mahira Alfiata Dwiyono, Linggar Rahmat Endah Sulistiawati Evitasari, Rachma Tia Hakim, Agus Rahman Huda, Muhammad Farkhan Fikri Ikhlasul Amal Imam Santosa Joko Pitoyo Karuana, Abi Nazli Kuncara, Jaka Martomo Setyawan Maryudi Maryudi Mazareta, Selva Mohammed, Hamad Khudhair Muhammad Kunta Biddinika Mustopa Muthadin , Akhmad Sabilal Nirmalasari, Jiran Nurmustaqimah Rahayu, Aster Rahmadewi, Yunda Maymana Rahmadewi, Yunda Maymanah Robi’in, Bambang Rosyady, Phisca Aditya Sabila, Liya Yusrina Safitri, Anggi Sari, Hutri Puspita Setyarini , Riska Siti Jamilatun Siti Salamah Sri Ardiansyah, Remmo Subrata, Arsyad Cahya Sudarmini Sudarmini, Sudarmini Sugianti, Ardina Fitri Suhendra Suradi, Siti Samahani Taufiqurahman , Muhamad Akmal Wijaya, Kenedy Wijayanti, Karima Anggita Yuwantina, Anissa Zahira, Shafa Zahrul Mufrodi, Zahrul