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Increasing Skills for Processing Rainwater into Clean Water using the Electrolysis Method Qudus, Nur; Sugiyarto, Bambang; Harianingsih, Harianingsih; Kristanto, Virgiawan Adi; Erliana, Savira Rinda; Pangestu, Indra Sakti; Ubay, Isnina Noor; Afidah, Asti Dwi
Jurnal Abdimas Vol 27, No 2 (2023): December 2023
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/abdimas.v27i2.46012

The aim of community service activities from the UNNES Civil Engineering and Chemical Engineering Department Collaboration Team in Patemon is to improve the community's skills in processing rainwater so that it is suitable for consumption using the electrolysis method which has been tested for effectiveness and quality in the laboratory first. The Patemon area is an area where the water source comes from wells, has a slope of 10-45% so that during the dry season there is a shortage of water flow. The very high rainfall in Patemon, an average of 1853 mm/month, has the potential to be processed into clean water as a solution for availability in the dry season. The methods used for this service activity include field observation and coordination, training to improve skills in improving rainwater processing using electrolysis, monitoring and evaluating service results. The results obtained from this activity show that rainwater electrolysis is an appropriate alternative for providing clean water in the Patemon area. The education provided by the UNNES service team has increased the community's knowledge and skills in rainwater processing from 8% to 35%. Increased knowledge regarding rainwater harvesting from the system and working principles of rainwater electrolysis from 0% to 85%. Enthusiasm and interest in implementing activities reached 98%.

Production of Persimmon Juice with Technology Ultrafiltration of Membrane to Improve People's Skills Rengga, Wara Dyah Pita; Siami, Desy Hikmatul; Nabil, Nisrina Hasna'; Handoko, Pratama Senapati Bagus; Pangestu, Indra Sakti; Saputra, Danang Dwi; Hidayah, Fauziyah Nurul
Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 20, No 1 (2022): July 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v20i1.44764

COVID-19 impacted the Grabag Village community's economic instability, resulting in the termination of employment. Grabag Village has the potential for persimmons as fresh fruit consumption, which lasts only less than two weeks. It is the background for the community empowerment activities for three months. The program aims to utilize membrane ultrafiltration technology and introduce the use of chitosan preservatives to the community. The implementation method applied includes the preparation, implementation, and evaluation stages. The results of this activity program show an increase in the knowledge of the partner community regarding the basic introduction of persimmon fruit, diversification of persimmon fruit products, and understanding of the production process with an average value of above 80%. However, only 75% of all partners understand online marketing from a technological point of view. Community assistance is needed to face the challenges of digitizing business actors to expand market share and reach increasingly widespread smartphone users. The community knows the potential of persimmon fruit, which can be used to make many processed products into ready-to-drink drinks. The partner also knows chitosan as a natural preservative and practices adding it directly to fruit juice, packaging, and labelling. After the socialization stage, the community is more educated regarding the procedures for making ready-to-sell persimmon juice from persimmon fruit.

FILTER AIR HUJAN DARI ADSORBEN ALAMI ENCENG GONDOK (Eichhornia Crassipes) Qudus, Nur; Sugiyarto, Bambang; Harianingsih, Harianingsih; Kristianto, Virgiawan Adi; Pangestu, Indra Sakti; Erliana, Savira Rinda; Ubay, Isnina Noor; Afidah, Asti Dwi
Bookchapter Alam Universitas Negeri Semarang No. 4 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ka.v1i4.166

Sistem pemanenan air hujan menjadi semakin penting dalam strategi pengelolaan air hujan yang berkelanjutan. Di negara- negara berkembang, masalah utama adalah pengolahan air yang tidak memadai dan kekurangan air. Terutama di kota-kota dan negara-negara berkembang, pemanenan air hujan dianggap sebagai sumber air alternatif yang sangat penting. Pemanenan air hujan telah disarankan sebagai teknologi bermanfaat di daerah di seluruh dunia yang mengalami musim kemarau. Jenis bahan atap dan kondisi lingkungan, seperti iklim setempat dan tingkat polusi atmosfer, memengaruhi kualitas air hujan yang dikumpulkan. Air hujan mengandung berbagai jenis bahan kimia, seperti ion bikarbonat, ion karbonat, amonia, natrium, kalium, kalsium, magnesium, hidrogen, sulfat, klorida, nitrat, dan magnesium sulfat. Konsentrasi ion hidrogen adalah faktor penting untuk mengukur tingkat keasaman hujan, atau hujan asam, Adsorpsi, pertukaran ion, pengendapan kimia, elektrolisis, elektrokoagulasi, kavitasi, elektrokoagulasi, dan ultrasonikasi adalah beberapa proses yang termasuk dalam kategori ini. Dalam produksi adsorben, asam klorida digunakan sebagai zat jenuh pada berbagai suhu aktivasi. Selain itu, adsorben digambarkan dengan Scanning Electron Microscope. Analisis suhu aktivasi digunakan untuk menentukan seberapa efektif eceng gondok dalam adsorpsi dan mengoptimalkan parameter tersebut sehingga adsorpsi dapat membantu menghilangkan BOD, COD, TDS, klorida, dan nitrat dari air hujan. Salah satu metode yang dilakukan untuk pengolahan air hujan dengan adsorpsi menggunakan adsorben enceng gondok. Selain itu, untuk mendapatkan hasil terbaik dengan menganalisis model kinetik dan isoterm adsorpsi. Hasilnya menunjukkan bahwa penggunaan adsorben enceng gondok menawarkan solusi pengolahan air hujan yang lebih hemat biaya dengan penggunaan listrik sebesar Rp. 1000,- setiap 15 menit proses adsorpsi sekali pdan ramah lingkungan.

FUNGSIONALISASI PLASMA DINGIN UNTUK PENGUAT IKATAN ADHESI PADA KOMPOSIT JERAMI PADI Harianingsih, Harianingsih; Imani, Nadya Alfa Cahaya; Sulistyawan, Vera Noviana; Pangestu, Indra Sakti; Erliana, Savira Rinda; Ubay, Isnina Noor
Bookchapter Alam Universitas Negeri Semarang No. 4 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ka.v1i4.171

Bahan lignoselulosa yang berasal dari jerami padi masih belum dioptimalkan sepenuhnya, dengan hanya sekitar 7-16% dari potensinya yang dimanfaatkan dalam industri. Salah satunya adalah pemanfaatannya sebagai bahan pengisi atau penguat dalam produk komposit polimer kayu, namun adhesi antarmuka pada aplikasi tersebut masih menjadi tantangan yang signifikan. Penggunaan perlakuan plasma dingin (atmosferik) sebagai alternatif untuk meningkatkan efektivitas serat jerami pada komposit kayu. Komposit dibuat dengan menggunakan serat jerami dan matriks polyvinyl alcohol yang bersifat biodegradable. Perlakuan plasma dilakukan dengan variasi waktu 10, 20, dan 30 detik, serta dibandingkan dengan komposit tanpa perlakuan plasma. Kekuatan komposit serat jerami/polivinil alkohol dianalisis melalui pengujian flexural, dengan fokus pada setiap variasi waktu perlakuan plasma. Kekuatan flexural tertinggi tercapai pada perlakuan plasma dengan durasi 30 detik. Perlakuan plasma, baik dengan maupun tanpa plasma, memberikan perbedaan signifikan dalam kekasaran permukaan. Plasma secara konsisten meningkatkan kekasaran, yang pada gilirannya meningkatkan adhesi antarmuka pada matriks komposit. Potensi peningkatan sifat mekanis dan morfologis komposit serat jerami/polivinil alhohol melalui perlakuan plasma, membuka peluang baru dalam pengembangan material yang ramah lingkungan dan efisien secara ekonomi.

Teknologi Dekafeinasi Biji Kopi Sederhana Untuk Industri Kecil di Desa Sriwulan Kabupaten Kendal Putri, Radenrara Dewi Artanti; Arfriandi, Arief; Nurmasitah, Sita; Megawati, Megawati; Pangestu, Indra Sakti; Salsabila, Luvena; Sitanggang, Desy Manuela Boru
Journal of Industrial Community Empowerment Vol 3, No 1 (2024): Published in April 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v3i1.235

Coffee is one of the leading commodities in Sriwulan Village, Kendal. This certainly has great potential for the economy to grow the MSME movement in the local community. The superior product that has been marketed is ground coffee in general which has quite a high caffeine content. Coffee with low caffeine content is currently a trend on the market and is popular with many health-conscious people. At the industrial level, widely developed decaffeination processes often use imported technology, both at the hardware and software level, which results in the price of low-caffeinated coffee still being relatively high. Limited public access to information regarding decaffeination techniques in coffee means consumers of low-caffeine coffee are willing to pay high prices to get a product that suits their tastes. The process of decaffeinating coffee beans can add value to the selling value of Indonesian coffee commodities, especially in Sriwulan Village, Kendal Regency. The aim of this service activity is to provide education and equipment assistance to the Sriwulan Village community about low-caffeine coffee and its production process to more attractive packaging, so that partner communities can take advantage of this to improve the economy of Sriwulan Village. The method of implementing this activity is carried out through the survey stage, training and monitoring stages. The implementation stage is carried out by processing coffee beans that have been peeled and dried in the sun, then steamed at a temperature of 100oC for 90 minutes. Coffee beans that have been steamed are ready to be dried and roasted according to the steps usually carried out by coffee farmers in Sriwulan Village. This service succeeded in increasing the understanding and interest of coffee producers in Sriwulan Village to develop low-caffeine coffee products. The program implemented can produce coffee beans that experience a reduction in caffeine levels of up to 80.8% after testing caffeine levels.

The Improvement of Modified Rice Straw Fiber/Polyvinyl Alcohol Thermoplastic Polymer Composite Using Cold Plasma Technology Harianingsih, Harianingsih; Indriawan, Ari Nur Dwi; Setiadi, Rizki; Pangestu, Indra Sakti; Ubay, Isnina Noor; Erliana, Savira Rinda
Indonesian Journal of Chemistry Vol 24, No 4 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.93255

The use of natural rice straw as a filler for composite materials has not been optimally utilized; only around 7–16% of the grain is used in the industry. Various developments have been carried out, including its use as a filler or reinforcement for wood polymer composite products, but it is not effective because of poor interfacial adhesion. An alternative to increase the effectiveness of straw fibers in wood composites is by using cold plasma (atmospheric) treatment. In this research, composites consisting of straw fiber and biodegradable polyvinyl alcohol (PVA) matrix were made with and without cold plasma injection treatment. PVA is used because of its hydrophilic nature and function as a matrix. This research aims to determine the effect of cold plasma injection on straw fiber/PVA composites. The method used consists of preparation of straw fiber and composites, flexural testing with time variations of 10, 20, and 30 sec, morphological analysis using SEM to determine surface roughness, and FTIR test. The results showed that treatment with and without plasma provided significant differences in roughness. Plasma causes roughness to increase, thereby increasing the adhesion of the interface to the matrix.

Improving The Competence of Batik Craftsmen in Liquid Waste Management Through Electrolysis Technology in Kampung Batik Gedong Qudus, Nur; Harianingsih, Harianingsih; Sugiyarto, Bambang; Kristianto, Virgiawan Adi; Siswoyo, Mohammad Pujo; Pangestu, Indra Sakti; Ubay, Isnina Noor; Erliana, Savira Rinda
Journal of Community Empowerment Vol. 5 No. 1 (2025): Journal of Community Empowerment
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jce.v5i1.31593

The Micro, Small, and Medium Enterprises (MSMEs) industry in Kampung Batik Gedong, Semarang, has made a significant contribution to the local economy through the production of Semarang's signature batik. However, this production activity produces liquid waste containing synthetic dyes and heavy metals, which have a negative impact on the environment. The lack of effective waste processing technology and the low knowledge and skills of MSMEs in waste management are major challenges that require immediate solutions. This community service program aims to increase the capacity of MSMEs in managing liquid waste sustainably through the application of electrolysis technology and integrated training. The activities are carried out in five stages: preparation, socialization, application, monitoring, and evaluation. The data collection method involves measuring the level of knowledge using pretests and posttests, as well as assessing skills through direct assessments by the service team. The target of the program's success is to increase the understanding of MSMEs implementer by 80% and skills by 75% after training. Electrolysis technology is applied to reduce the concentration of dyes and heavy metals in liquid waste, while training is provided to improve the understanding and technical skills of MSMEs implementer. The results of this program are expected to include reducing the level of liquid waste pollution, increasing the technical capacity of MSMEs implementer, and increasing awareness of the importance of environmental sustainability. Thus, this program supports environmental conservation, the sustainability of the batik industry, and the achievement of the Sustainable Development Goals (SDGs), especially SDGs 6 (Clean Water and Sanitation), SDGs 12 (Responsible Consumption and Production), SDGs 13 (Action on Climate Change), and SDGs 14 (Life Below Water).

Teknologi Dekafeinasi Biji Kopi Sederhana Untuk Industri Kecil di Desa Sriwulan Kabupaten Kendal Putri , Radenrara Dewi Artanti; Arfriandi , Arief; Nurmasitah , Sita; Megawati, Megawati; Pangestu, Indra Sakti; Salsabila , Luvena; Sitanggang , Desy Manuela Boru
JICE : Journal of Industrial Community Empowerment Vol. 3 No. 1 (2024)
Publisher : Politeknik ATI Padang

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

Coffee is one of the leading commodities in Sriwulan Village, Kendal. This certainly has great potential for the economy to grow the MSME movement in the local community. The superior product that has been marketed is ground coffee in general which has quite a high caffeine content. Coffee with low caffeine content is currently a trend on the market and is popular with many health-conscious people. At the industrial level, widely developed decaffeination processes often use imported technology, both at the hardware and software level, which results in the price of low-caffeinated coffee still being relatively high. Limited public access to information regarding decaffeination techniques in coffee means consumers of low-caffeine coffee are willing to pay high prices to get a product that suits their tastes. The process of decaffeinating coffee beans can add value to the selling value of Indonesian coffee commodities, especially in Sriwulan Village, Kendal Regency. The aim of this service activity is to provide education and equipment assistance to the Sriwulan Village community about low-caffeine coffee and its production process to more attractive packaging, so that partner communities can take advantage of this to improve the economy of Sriwulan Village. The method of implementing this activity is carried out through the survey stage, training and monitoring stages. The implementation stage is carried out by processing coffee beans that have been peeled and dried in the sun, then steamed at a temperature of 100oC for 90 minutes. Coffee beans that have been steamed are ready to be dried and roasted according to the steps usually carried out by coffee farmers in Sriwulan Village. This service succeeded in increasing the understanding and interest of coffee producers in Sriwulan Village to develop low-caffeine coffee products. The program implemented can produce coffee beans that experience a reduction in caffeine levels of up to 80.8% after testing caffeine levels.

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