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Diversifikasi Olahan Susu Sapi Segar Menjadi Produk Kefir untuk Minuman Probiotik dan Masker Wajah di Kelurahan Plalangan Gunungpati Semarang Prasetiawan, Haniif; Triwibowo, Bayu; Kusumaningtyas, Ratna Dewi; Bahlawan, Zuhriyan Ash Shiddieqy; Widyastuti, Catur Rini
Jurnal Pengabdian Masyarakat: Darma Bakti Teuku Umar Vol 4, No 2 (2022): Juli-Desember
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/baktiku.v4i2.5691

Abstract

Plalangan Village is one of the villages that produce fresh cow's milk in the administrative area of Gunungpati District, Semarang City, Central Java Province. The average daily activity of residents of Terwidi Village RT02 RW04, Plalangan Village, Gunungpati District, Semarang City in particular is raising cattle. The number of cattle breeders is 40 people who are members of the Ngudi Rahayu Terwidi Dairy Cattle Group (KTSP). The current number of cows is 75 heads, much lower than 5 years ago. The decline in the number of cows is due to the fact that they think that a dairy business that only relies on dairy products does not provide a steady income. Even though there is a lot of potential that can be developed from the dairy cattle business, including the diversification of dairy products. Kefir is a heterofermentative fermented product that has a taste, color and texture that resembles yogurt and has a distinctive aroma like tape. Kefir products circulating in the community today are not only consumed as probiotic drinks but can also be used as cosmetic products, such as masks. The main program will be carried out by the Community Service (PKM) team by empowering dairy cattle businesses through diversification of fresh cow's milk products to become high-value products, namely kefir which can be used as probiotic drinks and face masks.
Enzymatic Transesterification Using Different Immobilized Lipases and its Biodiesel Effect on Gas Emission Mohamad Nor, Nur Fatin Syafiqah; Veny, Harumi; Hamzah, Fazlena; Muhd Rodhi, Miradatul Najwa; Kusumaningtyas, Ratna Dewi; Prasetiawan, Haniif; Hartanto, Dhoni; Sulaiman, Sarina; Sazali, Rozana Azrina
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 2 Year 2024 (August 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20143

Abstract

Biodiesel, a third-generation bio-fuels, offering several advantages over regular diesel fuel. Waste cooking oil (WCO) emerges as an ideal feedstock due to its availability and easy accessibility. In this work, biodiesel is utilized from two different types of immobilized lipases: Rhizomucor miehei lipase (RMIM) and Candida antarctica lipase B (CALB). The impact of the molar ratio of oil to methyl acetate (1:3-1:12) was evaluated for both lipases, and the resultant biodiesel was tested in diesel engine. The enzymatic transesterification was carried out in ultrasonic assistance and the results showed that the greatest yield of 81.20% at 45℃, using CALB as a biocatalyst, 1.8% (w/v) lipase and oil to methyl acetate molar ratio of 1:12 within 3 hours. Triacetin, by-product was determined their concentration for each molar ratio and analyzed using FTIR range of 500cm-1 to 4000cm-1, revealing a significant absorption peak at 1238.90cm-1. Biodiesel was blended with commercial diesel fuel in varying quantities of 7, 10, and 20% by volume (B20). The results were compared to Industrial Diesel Fuel 7% (B7) and Commercial Diesel Fuel 10% (B10). NOx and CO2 emission drops as the percentage of diesel/biodiesel blends increases, supporting WCO as a cost-effective biodiesel feedstock with low petrol pollution.
Pojok “Curhat” Pekerja Migran Indonesia di Korea Selatan Sebagai Sarana Penguatan Mental di Negara Asing Martuti, Nana Kariada Tri; Kusumaningtyas, Ratna Dewi
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2025)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v6i1.11282

Abstract

Pekerja Migran Indonesia (PMI) dan keluarganya diharapkan dapat terjamin pemenuhan haknya dalam ke seluruhan kegiatan sebelum bekerja, selama bekerja, dan setelah bekerja dalam aspek hukum, ekonomi, dan sosial. Korea Selatan menjadi salah satu negara tujuan utama para Tenaga Kerja Indonesia (TKI). Karena dibandingkan dengan negara lain, Korea Selatan menawarkan lebih banyak pekerjaan di sektor formal. PUMITA (Persaudaraan Umat Muslim Indonesia Al-Fattah Busan), merupakan organisasi yang menaungi PMI di Korea Selatan, yang selanjutnya akan menjadi mitra dalam kegiatan pengabdian kepada masyarakat ini. Permasalahan yang dihadapi mitra dapat dikelompokkan menjadi 2 aspek, yaitu: (1) Sebagai wadah teman cerita permasalahan PMI di Korea Selatan (2) Bantuan solusi permasalahan social PMI di Korea Selatan melalui “Pojok Curhat”. Adapun rincian dari target yang dihasilkan adalah sebagai berikut: (1) Menguatkan mental dan rasa percaya diri PMI, dalam menghadapi permasalahan social budaya sebagai pekerja migran di Korea Selatan dan (2) Teman berbagi pengalaman terkait kondisi PMI Indonseia di Korea Selatan dengan adanya pojok curhat bagi pekerja migran, dapat bekerja dengan lebih nyaman dan baik dengan persoalan yang akan ditangani secara bersama-sama. Hasil kegiatan pengabdian diperoleh bahwa, PMI di Busan tersebar di berbagai industri dan pelayaran/perikanan. Dalam menjalin silaturami antar PMI di Busan, Masjid menjadi salam satu sarana menjadi tempat pertemuan antar PMI. Disamping melakukan sholat Jumat atau perayaan hari besar, pertemuan di masjid menjadi sarana saling tukar pikiran dan pengalaman yang dialami masing-masing PMI. Para pekerja migran bercerita bahwa stres terbesar yaitu pada waktu pertama kali datang ke Korea Selatan, karena adanya perbedaan budaya, jauh dengan keluarga, serta adanya tuntutan pekerjaan yang tinggi. Sehingga adanya pertemuan dengan sesama PMI, dapat meringankan beban dan menjadi sarana belajar bersama
Pengendalian Stunting Melalui Edukasi Pengolahan Ragam Makanan Sehat dari Bahan Lokal dan Pendampingan Posyandu di Kelurahan Bongsari, Kota Semarang (Kolaborasi UNNES - PT Phapros, Tbk): Stunting Preventin through A Training on Processing a Variety of Healthy Foods from Local Ingredients and Assistance for Posyandu Cadres in Kelurahan Bongsari, Semarang City (Collaboration of UNNES and PT Phapros, Tbk) Kusumaningtyas, Ratna Dewi; Lestari, Yanesti Nuravianda; Handayani, Prima Astuti; Laila, Rachma Akmila; Salsabila, Anida; Rahmah, Aisyah Khalimatur; Putri, Silvia Nouvelia; Rachmadi, Moch Faizal; Jannah, Reni Ainun; Imani, Nadya Alfa Cahaya; Barita, Asyera Dewi; Kun, Stefania Orance; Nindita, Ariana Eka
Jurnal Pengabdian Magister Pendidikan IPA Vol 7 No 4 (2024): Oktober-Desember 2024
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v7i4.9424

Abstract

Stunting is among the national priority issue in the National Medium Term Development Plan (RPJMN). At the global level, stunting is also a priority based on the Sustainable Development Goals (SDGs), especially related to the 3rd and 2nd SDGs, namely "good health and well-being" and "zero hunger". In this regard, the Semarang City Government has targeted that by 2024 the city will be free of stunting or zero stunting. On the other hand, the city of Semarang still records quite significant stunting data, namely 912 cases in 2024. To achieve the target of zero stunting, a synergy between the government, community, universities and industrial corporate social responsibility is necessary and can be implemented through community service and empowerment activity. Kecamatan Semarang Barat is among the area which record a quite high stunting rates in Semarang city, namely 84 cases in January 2024. To reduce the stunting rate in Kecamatan Semarang Barat, especially Kelurahan Bongsari, is a synergy between universities (UNNES), industry (pharmaceutical company PT Phapros Tbk), and local government is developed through a community service activities. Community service activities has been carried out in the form of education on stunting awareness, training on processing a variety of healthy foods from local ingredients and training to increase the capacity of posyandu cadres in Kelurahan Bongsari. UNNES and PT Phapros Tbk team also contribute in the form of recipe book, vitamins, and anthropometry equipment.
Penerapan Alat Peniris Minyak Sentrifugal untuk Meminimalkan Kandungan Minyak pada Berbagai Macam Olahan Makanan pada Usaha Kecil Kuliner di Kelurahan Sekaran Gunungpati Semarang Widjanarko, Dwi; Kusumaningtyas, Ratna Dewi; Yudiono, Heri; Kusumawardani, Rini; Widyastuti, Catur Rini
Jurnal Pengabdian Magister Pendidikan IPA Vol 7 No 4 (2024): Oktober-Desember 2024
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v7i4.9574

Abstract

Sekaran is a fairly densely populated area because it is located around the Semarang State University campus. With this dense population, culinary businesses around Sekaran are also growing. Many culinary businesses produce fried foods of various types. The problem encountered in this culinary business is that there is still a lot of oil content in the food products. This of course can harm the health of consumers. The aim of this activity is to reduce the oil content in food. The solution used is to apply an oil drainer to food products produced by culinary businesses around Sekaran. The activities carried out include: providing an understanding of the dangers of food that contains a lot of oil, providing an explanation of how to drain oil from food quickly, and providing training in the use of a drainer. The results of the activities that have been carried out are 1) providing an explanation of the function of each part of the drainer. oil in food; 2) socialize the importance of reducing the oil content in fried foods; 3) education about the effects caused by the presence of oil in food; and 4) training on how to use tools to drain oil from food has been carried out through demonstrations of tool use.
Optimization of Water-in-Biodiesel  Emulsification of Palm Oil by Ultrasonic Method using  Respons Surface Methodology Fauzi, Dinda Adelia; Kusumaningtyas, Ratna Dewi; Widyastuti, Catur Rini; Veny, Harumi
Rekayasa Vol. 23 No. 1 (2025)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v23i1.31831

Abstract

Palm oil biodiesel offers a renewable alternative but has high viscosity and density. Emulsifying biodiesel with water reduces these drawbacks and lowers nitrogen oxide (NOx) emissions. This study aims to optimize the emulsification process of water-in-biodiesel emulsion made from palm biodiesel (B100) using an indirect ultrasonic method and the response surface methodology approach with a Box-Behnken design. Three main independent variables were examined: hydrophilic-lipophilic balance values (6, 7.5, and 9), water concentrations (9%, 12%, and 15% v/v), and surfactant concentrations (5%, 7%, and 9% v/v) with a combination of Tween 80 and Span 80 as surfactants. The experimental process involves the synthesis of biodiesel from palm oil through transesterification with the help of 100W ultrasonic power for 15 minutes at room temperature. The analysis was carried out on three main parameters: density, viscosity, and water droplet size on water-in-biodiesel. The results of laboratory tests and statistical modeling show the three independent variables have a significant effect on the physical properties of water-in-biodiesel. The optimization resulted in the best conditions at a hydrophilic-lipophilic balance value of 6.11, water concentration of 9.06%, and surfactant concentration of 5%, with density characteristics of 859.95 kg/m³, kinematic viscosity of 4.44 mm²/s, and average water particle size of 4.46 μm, values close to conventional diesel fuel standards. This study confirms that the indirect ultrasonic method and respons surface methodology-based optimization are effective in improving the performance and character of water-in-biodiesel, potentially becoming a reference for the development of environmentally friendly renewable energy based on palm oil.
Steady-State and Dynamic Simulation Study of Reactive Distillation for FFA Esterification in Biodiesel Synthesis Kusumaningtyas, Ratna Dewi; Prasetiawan, Haniif; Nugroho, Daniel Setiyo; Wulandari, Ajeng Riswanti; Istadi, Istadi; Hisyam, Anwaruddin
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 1 (2021): Jurnal Rekayasa Kimia & Lingkungan (June, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v16i2.19857

Abstract

Reactive distillation (RD) holds promise for process intensification in biodiesel production since it integrates reaction and separation. It simplifies the process and enhances the conversion of the equilibrium limited reactions. To ensure the stability in RD operation, sensitivity study and process control simulation are necessary. In this work, RD was employed for free fatty acid (FFA) esterification of mixed non edible oils in biodiesel synthesis. Non edible oils used were waste cooking oil, crude jatropha oil, and crude nyamplung oil (Calophyllum inophyllum L). Simulation was conducted using ASPEN Plus V8.8. Sensitivity study was carried out to determine the effects of the operating condition alteration. A dynamic simulation was performed as a Proportional-Integral-Derivative (PID) controller tuning. It was revealed that the highest FFA conversion was 85%, achieved at the feed stage of 7, distillate rate of 0.22 kmol/hr, and oil to methanol molar ratio of 1:5. Level, pressure and temperature controls were installed in RD. Then, a dynamic simulation was applied as a PID controller tuning. Three different controller tuning methods, viz. Ziegler-Nichols, Cohen-Coon, and Internal Model Control, were studied. The best PID parameter was obtained by using Cohen-Coon method which provided fastest rise time, lowest settling time and lowest overshoot.
Alteration of Biodiesel Properties and Automotive Diesel Engine Performance due to Temperature Variation of the Transesterification Process Widjanarko, Dwi; Kusumaningtyas, Ratna Dewi; Fathoni, Ahmad Afwan
Jurnal Rekayasa Kimia & Lingkungan Vol 15, No 2 (2020): Jurnal Rekayasa Kimia & Lingkungan (December, 2020)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v15i2.16007

Abstract

This study aimed to examine the effects of transesterification reaction temperature on the biodiesel properties and diesel engine performance. Biodiesel properties evaluated in this work included viscosity, density, and methyl ester content. Meanwhile, the diesel engine performance testing comprised the examination of the engines torque and power. The research was conducted in several stages, viz. producing biodiesel from fresh cooking oil with variations in transesterification temperature of 45, 55, and 65; testing the characteristics of biodiesel produced; blending biodiesel with petroleum diesel to result in B30 biodiesel fuel; and testing biodiesel fuel (B30) in diesel-engined vehicles. It was revealed that the higher transesterification temperature led to the lower biodiesel viscosity, the decreasing value of biodiesel density values, and the higher methyl ester content. Furthermore, it was also demonstrated that increase of the transesterification temperature resulted in the higher value of torque and power generated. However, compared to the petroleum diesel fuel (B0), biodiesel fuel (B30) exhibited the lower values of the engines torque and power. The highest average values of torque and power of B30 fueled diesel-engine were 108.11 Nm and 43.51 kW, respectively, provided by the biodiesel produced at the transesterification reaction temperature of 65.of 65.
Improving Clean and Healthy Living Behaviors Among Indonesian Migrant Workers in Malaysia Cahyati, Widya Hary; Kusumaningtyas, Ratna Dewi; Wibawanto, Wandah; Salsabila, Annisa Putri; Nathaniela, Regina Marsha; Rahmat, Sultan Aulia
Jurnal Abdimas Vol. 28 No. 1 (2024): June 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/3zwq9z73

Abstract

The Clean and Healthy Living Behavior Program (PHBS) is an effort to prevent disease by getting used to clean living and healthy behavior. PHBS is very important to be applied to the entire community, including Indonesian Migrant Workers (PMI). PMI live overseas, so health is very important. If they get sick, it will create new problems because access to health services is limited, and there is no family who can look after them. The solution offered to partners' problems is socialization regarding clean and healthy living habits, as well as how to get used to clean and healthy behavior. The development of a video about how to get used to living a clean and healthy life aims to increase the capacity of Indonesian migrant workers in Malaysia to get used to living a clean and healthy life, so that they can prevent disease attacks. The use of videos is intended to make socialization activities more effective. The Indonesian Embassy in Johor Bahru is a service partner, which will assist in bridging the service program that UNNES will carry out for PMI in the Johor Bahru Region. After conducting outreach to PMIs, the next step is to form several groups consisting of several PMIs to ensure the sustainability of the implementation of the PHBS program. The result of this activity is the availability of the PMI group as a forum for sharing and doing joint activities , as well as increasing knowledge and understanding about PHBS.
Penerapan Mesin Spinner Peniris Minyak dan Perbaikan Kemasan Produk pada UMKM Keripik di Desa Kemetul, Kecamatan Susukan, Kabupaten Semarang Kusumaningtyas, Ratna Dewi; Prasetiawan, Haniif; Bahlawan, Zuhriyan Ash Shiddieqy; Widyastuti, Catur Rini; Imani, Nadya Alfa Cahaya; Rachmadi, Moch Faizal; Jannah, Reni Ainun; Ichwan, Rizky; S., Syifa Azzahra Putri
Jurnal Abdimas Vol. 29 No. 2 (2025): December 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/abdimas.v29i2.36448

Abstract

Desa Kemetul, Kecamatan Susukan is one of 208 villages developed into tourist villages in Kabupaten Semarang. Desa Kemetul is an area rich in agricultural products. Cassava and taro crops in this village are often processed into chips and serve as a source of income for residents. Common problems that often arise with chip products are the remaining oil content in the chips after frying and inappropriate product packaging. Thus, it reduces the quality and shelf life of the chip product. This Community Service activity focused on improving the chip production process at the Jago MSME in Desa Kemetul. The activity began with discussions and coordination with the local government and Jago MSME owner as partner. The activities included the implementation of an oil spinner machine and improved packaging with a portable sealer and silica gel. The application of appropriate technology can improve the chips quality and shelf life of products. It as well increases production capacity, profit potential, and support the development of Desa Kemetul as a tourist village.
Co-Authors Achmad Bachtiar Agung Ari Wibowo Ahmad Afwan Fathoni Ajeng Riswanti Wulandari Akbar, Muhammad Hafizt Andri Cahyo Kumoro Anugrahani, Viona Widya Anwaruddin Hisyam Anwaruddin Hisyam Arief Budiman Arief Budiman Arief Budiman Ashroful In'am Atuzzuhro, Qoni' Ayu Fadilah Wahid Aza Putri Anisa Bachtiar, Achmad Bahlawan, Zuhriyan Ash Shiddieqy Barita, Asyera Dewi Bayu Triwibowo Cahya Wulandari Catur Rini Widyastuti, Catur Rini Chafidz, Achmad Daniel Setiyo Nugroho Daniel Setiyo Nugroho, Daniel Setiyo Dewi Selvia Fardhyanti Dewi Trisnani Dhoni Hartanto Dimas Rahadian Aji Muhammad, Dimas Rahadian Aji Dody Herdian Saputra Riyadi Dody Herdian Saputra Riyadi Dwi Fibriyani Dwi Widjanarko Evi Widowati Fathoni, Ahmad Afwan Fauzi, Dinda Adelia Fazlena Hamzah Fazlena Hamzah Fera Arinta Fidyawati, F Fitra Aulia Rahma H Hadiyanto Hadikawuryan, Danang Subarkah Hamzah, Fazlena Handri Rama Pradani Haniif Prasetiawan Hardi Suyitno Harumi Veny Harumi Veny Heri Yudiono I. Istadi Ichwan, Rizky Imam Novrizal Aji Imani, Nadya Alfa Cahaya Irene Nindita Pradnya Jannah, Reni Ainun Khoiroh, Ianatul Kun, Stefania Orance Kusuma, Andre Dianata Hogi Laila, Rachma Akmila Lestari, Yanesti Nur Avianda Loveyanto, Rendy Okta M Nasikin Maftukhaturrizqiyah, Maftukhaturrizqiyah Maksiola, Masni Megawati Megawati Mezaki, Naufal Mudrik Miradatul Najwa Muhd Rodhi Miradatul Najwa Muhd Rodhi Mohamad Nor, Nur Fatin Syafiqah Muhammad Fikri Al Ghifari Muhammad Zarin Amin Zainal Muhd Rodhi, Miradatul Najwa Mustofa Mustofa Mutaqin, Afrizal Mai Nadya Alfa Cahaya Imani Nana Kariada Trimartuti Nathaniela, Regina Marsha Nina Hartini Nina Hartini Nindita, Ariana Eka Nur Qudus Oktafiani Oktafiani, Oktafiani Oktafiani, Oktafiani Oktafiani, Oktafiani Pradnya, Irene Nindita Prima Astuti Handayani Purwana, Yulian Candra Putri, Silvia Nouvelia Putut Marwoto Rachmadi, Moch Faizal Radenrara Dewi Artanti Putri, Radenrara Dewi Artanti Rahmah, Aisyah Khalimatur Rahmat, Sultan Aulia Reshita Amalia Ramadhani Reshita Amalia Ramadhani Ria Wulansarie, Ria Rini Kusumawardani, Rini Riza Mazidu Sholihin Rochmadi Rochmadi Rochmadi Rochmadi Rr. Dewi Artanti Putri, Rr. Dewi Artanti S Mursiti S., Syifa Azzahra Putri Sabirin Matsjeh Salsabila, Anida Salsabila, Annisa Putri Santi Wijayanti, Dwi Gansar Sarina Sulaiman Sazali, Rozana Azrina Siti Salwa Azzahra Nurazizah Nuruljannah Sunyoto Sunyoto Suryo Purwono Sutrisno, Akhmad Syah, Ahmad Faiz Armiano Syamrizal, Zakky Syarifatur Richana Syarifatur Richana Syifa Karimah Tyas Samesti Ummi Nur Laila Sulistyani Veny, Harumi Wandah Wibawanto Wara Dyah Pita Rengga Wicaksono, Dino Widi Astuti Widya Hary Cahyati Wijayanti, Reni Titis Wulandari, Ajeng Riswanti Wulansari, Durroti Zuhriah Zakaria, Zainul Akmar