E-Journal Politeknik Negeri Cilacap
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Analisis Variasi Bahan terhadap Kualitas Pupuk Organik Cair (POC) Dari Sisa Makanan
Get PDFA The generation of food waste is increasing along with the times. Food waste that is not processed properly will increase carbon emissions from the degradation of the waste. Therefore, proper processing is needed to reduce the generation of food waste. One method of processing food waste is to process food waste into liquid organic fertilizer (LOF) through an anaerobic fermentation process. In this research, food waste was processed into LOF using the fermentation method. This fermentation was carried out for 12 days without the presence of oxygen. In this study, there were variations in stirring to analyze the comparison of LOF results with these variations. Apart from that, food waste is mixed with goat and cat feces. This dirt can increase levels of nitrogen, phosphorus and potassium in the LOF. Analysis of LOF quality parameters in this study consisted of C-organic, phosphorus, potassium, N-total, and pH. The results of this research showed that pH of LOF met LOF quality standard based on the degree of the Minister of Agriculture No. 261 2019. The results of the MANOVA (Multivariate Analysis of Variance) test show material variations affected all dependent variables with a significance value of α < 0,05. The best variation was 40% cat feces and 60% food waste that produced the highest total NPK.Timbulan sisa makanan yang semakin meningkat seiring dengan perkembangan zaman. Sampah sisa makanan yang tidak diolah dengan baik akan meningkatkan emisi karbon dari hasil degradasi sampah tersebut. Oleh karena itu, dibutuhkan pengolahan yang tepat untuk mengurangi timbulan sampah sisa makanan. Salah satu metode pengolahan sampah sisa makanan adalah mengolah sampah sisa makanan menjadi pupuk organik cair (POC) melalui proses fermentasi secara anaerobik. Pada penelitian ini melakukan pengolahan sisa makanan menjadi POC dengan metode fermentasi. Fermentasi ini dilakukan selama 12 hari tanpa kehadiran oksigen. Pada penelitian ini terdapat variasi pengadukan untuk menganalisis perbandingan hasil POC dengan variasi tersebut. Selain itu, sisa makanan dicampurkan dengan kotoran kambing dan kucing. Kotoran tersebut dapat meningkatkan kadar nitrogen, phosphor dan kalium dalam POC. Analisis parameter kualitas POC dalam penelitian ini terdiri dari C-organik, phosphor, kalium, N-total, dan pH. Hasil penelitian menunjukkan bahwa pH POC telah memenuhi standar berdasarkan Peraturan Menteri Pertanian No. 261 Tahun 2019. Uji MANOVA (Multivariate Analysis of Variance) menunjukkan bahwa variasi bahan yang dilakukan berpengaruh pada semua variabel terikat dengan nilai P-value < 0,05. Variasi bahan terbaik yaitu 40% kotoran kucing dan 60% sisa makanan yang menghasilkan kandungan total NPK tertinggi
Identifikasi Kandungan Karbon dan Nitrogen pada Kotoran Sapi Feedlot Polije dan Kulit Pisang
Get PDFPoliteknik Negeri Jember has cow dung waste which needs to be utilized so that it does not pollute the environment. However, the C/N ratio of cow dung is 24. To optimize biogas production, raw materials that contain high carbon sources can be added. Banana peel is waste with a carbon content of 36%, so it is an alternative raw material that can be used to produce biogas. Analysis of total C from cow dung and banana peels was carried out using spectrophotometric methods. Total N analysis of cow feces and banana peels was carried out based on the Kjeldhal method. The sample weight for each type of material was made of 2 samples, for banana peel the weight of the samples made was 236 mg and 312 mg. Meanwhile, for cow feces, the sample weights were 223 mg and 291 mg. The average organic carbon obtained from banana peels is 2.413%, while the organic carbon in cow feces is 4.569%. This result was obtained by comparing the relationship between the sample\u27s absolute standard and concentration against a graph. In the process of making biogas, the nitrogen content should not be excessive because this can result in the production of excess ammonia gas rather than methane gas. The average nitrogen content in banana peels and cow feces is 0.062% and 0.160% respectively. These results indicate that the nitrogen content in the sample is relatively very small so it has the potential to be used as a raw material for making biogas. The results of the organic carbon and nitrogen content in banana peels and cow dung were compared. The average value of the C/N ratio of banana peel is 39.158% and cow feces is 28.707%. These two results indicate that both samples have the potential to produce good biogas.Politeknik Negeri Jember mempunyai limbah kotoran sapi yang perlu dimanfaatkan agar tidak mencemari lingkungan. Namun rasio C/N kotoran sapi adalah 24. Untuk mengoptimalkan produksi biogas dapat ditambahkan bahan baku yang mengandung sumber karbon tinggi. Kulit pisang merupakan limbah dengan kandungan karbon sebesar 36% sehingga merupakan salah satu bahan baku alternatif yang dapat digunakan untuk menghasilkan biogas. Analisis total C dari kotoran sapi dan kulit pisang dilakukan dengan menggunakan metode spektrofotometri. Analisis N total feses sapi dan kulit pisang dilakukan berdasarkan metode Kjeldhal. Berat sampel untuk masing-masing jenis bahan dibuat 2 sampel, untuk kulit pisang berat sampel yang dibuat yaitu 236 mg dan 312 mg. Sedangkan untuk feses sapi berat sampel dibuat 223 mg dan 291 mg. Rata-rata karbon organik yang didapatkan dari kulit pisang yaitu 2,413%, sedangkan karbon organik pada feses sapi yaitu 4,569%. Hasil ini diperoleh dengan membandingkan terhadap grafik hubungan antara standar absolut sampel dengan konsentrasi. Pada proses pembuatan biogas kandungan nitrogen tidak boleh berlebih karena hal itu dapat mengakibatkan produksi gas amonia berlebih dari pada gas metana. Rata-rata kandungan nitrogen pada kulit pisang dan feses sapi berturut-turut yaitu 0,062% dan 0,160%. Hasil ini menunjukkan bahwa kandungan nitrogen pada sampel relatif sangat kecil sehingga berpotensi untuk digunakan sebagai bahan baku pembuatan biogas. Hasil kandungan karbon organik dan nitrogen pada kulit pisang dan kotoran sapi dibandingkan keduanya. Nilai rata-rata rasio C/N kulit pisang sebesar 39,158% dan feses sapi sebesar 28,707%. Kedua hasil tersebut menunjukkan bahwa kedua sampel mempunyai potensi menghasilkan biogas yang baik
Sistem Informasi Manajemen Legalisir Online Berbasis Website
Get PDFManagement and submission of legalization at the Harapan Bersama Polytechnic have not been computerized. The legalization process is carried out face-to-face by leaving legalized documents and returning them when the legalized documents are ready. This process is problematic because going to campus requires quite a long time, and there is no certainty or travel history from the management of legalized documents. The research objective is to build a legalization system to facilitate the process of implementing legalization in BAA units using the website-based waterfall method. This system validates alumni data in the form of NIM at registration, processes payments through payment gateways, pays for selected shipments, and tracks travel history from the submitted legalized documents. This system is called Simaleja, and there are two actors involved. As a result, the system runs according to the functions of the actors involved and has been tested. As for the results of the black box (actor) test, the system has been running according to the function of each actor, and the UI/UX usability results were obtained for 38 users, 82% of whom fall into the very good category.
 
Aplikasi Damai : Desain Persuasif Aplikasi Konsultasi Kesehatan Mental Berbasis Mobile Menggunakan User Centered Design
Get PDFMental health is health related to a person\u27s emotional, mental and psychological condition. Anxiety disorders are conditions in which individuals experience anxiety for short periods of time or intense episodes, where this anxiety can occur for no apparent reason. Damai is a mobile-based application designed to help overcome mental health problems, especially anxiety disorders among teenagers. This research focuses on designing a user interface that involves users directly at every stage of UCD, starting from user needs, concept design, to implementation of application prototypes. The success of this research was designing a mobile-based mental health consultation application to help teenagers who suffer from mental health. This application successfully provides several features such as mental health tests, online or offline counseling and pharmacy services. In trials conducted on 6 participants, the success of the trial can be concluded that the average direct success was 100%, the misclick rate was 25%, and the average duration was 38.1 seconds
Dampak Pencemaran Mikroplastik Pada Ikan, Kerang dan Sedimen Di Perairan Indonesia: Review
Get PDFThe presence of microplastics adversely affects the presence of toxic absorbs such as PBTs (persistent, bioaccumulative, and toxic substances) and POPs (persistent organic pollutants). The process of degradation of plastic waste into microplastics can be through natural and chemical processes. Plastic type waste and synthetic / elastic will be difficult to decompose naturally. The increase in population will have an impact on the value of consumption so that it has an impact on individual or household waste production. Residents have the potential to move from one place to another in making tourist visits to water areas. As a result of poor behavior, garbage has the potential to be thrown anywhere. The types of waste found are plastic, cigarette wraps and butts, thread, nylon, bottles, plastic materials and other types. The research method used is an approach to scientific journals on various platforms (Mendeley, Google, University Journals and so on). Plastic decomposition will decompose in the soil very slowly and takes up to 1000 years, even waste from plastic bottles can decompose within 450 years to degrade to make microplastics. Microplastics are found in marine life such as fish, snails and sediments in waters. Microplastics are found in several types, namely pellets, fragments, fibers, Styrofoam films, and foams. The shape or type that dominates is the shape of fiber. Microplastics have an adverse impact on the health of organisms in the waters, including disorders of organisms in the waters are disorders of endoctrination, metabolism, tissue destruction, inflammation and growth disorders and decreased survival.Kehadiran mikroplastik berdampak buruk karena adanya absorbs toksikan seperti PBTs (persistent, bioaccumulative, and toxic substances) dan POPs (persistent organic pollutants). Proses degradasi sampah plastik menjadi mikroplastik dapat melalui proses alami dan kimiawi. Limbah jenis plastik dan bersifat sintetis/elastis akan sulit terurai secara alami. Bertambahnya penduduk akan berdampak terhadap nilai konsumsi sehingga berdampak terhadap produksi limbah perorangan atau rumah tangga. Penduduk memiliki potensi berpindah dari satu tempat ketempat lain dalam melakukan kunjungan wisata kawasan perairan. Akibat perilaku yang kurang baik maka sampah berpotensi dibuang disembarang tempat. Jenis limbah yang ditemukan adalah plastik, bungkus dan puntung rokok, benang, nilon, botol, bahan plastik dan jenis lainnya. Metode penelitian yang digunakan adalah pendekatan terhadap jurnal ilmiah diberbagai platform (Mendeley, Google, Jurnal Universitas dan sebagainya). Dekomposi Plastik akan terurai ditanah dengan sangat lambat dan membutuhkan waktu hingga 1000 tahun, bahkan sampah dari botol plastik dapat terurai dalam waktu 450 tahun hingga terdegradasi membuat mikroplastik. Mikroplastik ditemukan pada biota laut seperti pada ikan, keong dan sedimen di perairan. Mikroplastik ditemukan dalam beberapa jenis yaitu pellet, fragmen, fiber, film styrofoam, dan busa. Adapun bentuk atau jenis yang mendominasi adalah bentuk fiber. Mikroplastik berdampak tidak baik bagi kesehatan organisme di perairan antara lain gangguan organisme diperairan adalah gangguan endoktrin, metabolisme, kebinasaan jaringan, inflamasi dan gangguan pertumbuhan serta penurunan ketahanan hidup
Analisis Pencemaran Air Sungai Cigayam Kabupaten Cirebon Akibat Pembuangan Limbah Industri Batu Alam
Get PDFOne of the problems in rivers is water pollution due to the discharge of waste directly into the river, which can reduce the quality of river water. The large number of natural stone processing activities in Dukupuntang District has the potential to become a source of river water pollution. The aim of this research is to analyze river water pollution due to the disposal of natural stone industrial waste in terms of physical, chemical and biological parameters, as well as determine the impact of river water pollution due to the disposal of natural stone industrial waste on the water quality of the Cigayam River. This research was carried out in Cangkoak Village, Dukupuntang District, Cirebon Regency. This research analyzes physical parameters (temperature, water brightness, water color, water smell, current speed), chemical parameters (pH, DO, BOD, COD) which are compared with class IV water quality standards based on Republic of Indonesia Government Regulation No. 22 of 2021 about Implementation of Protection and Enviromental Management, biological parameters (macroinvertebrates) identified using the electronic book Introduction to Southeast Asian Pond and River Invertebrates. The research results showed a decrease in river water quality with several test parameters that exceeded quality standards, namely pH, DO, BOD, COD. The water quality index value at stations 1 and 2 shows moderately polluted water quality, while station 3 shows dirty polluted water quality. This explains that the disposal of natural stone waste directly into rivers causes a decrease in water quality, one of which is due to the content of chemicals, such as metal elements or salts which can affect water quality. Thus, the pollution level of the Cigayam River is included in the moderate pollution level.Salah satu permasalahan di sungai adalah adanya pencemaran air karena adanya pembuangan limbah yang langsung ke sungai, sehingga dapat menurunkan kualitas air sungai. Banyaknya kegiatan pengolahan batu alam di Kecamatan Dukupuntang berpotensi menjadi sumber pencemaran air sungai. Tujuan penelitian ini adalah untuk menganalisis pencemaran air sungai akibat pembuangan limbah industri batu alam ditinjau dari parameter fisika, kimia, dan biologi, serta menentukan dampak pencemaran air sungai akibat pembuangan limbah industri batu alam terhadap kualitas air Sungai Cigayam. Penelitian ini dilaksanakan di Desa Cangkoak, Kecamatan Dukupuntang, Kabupaten Cirebon. Penelitian ini menganalisis parameter fisika (suhu), parameter kimia (pH, DO, BOD, COD) yang dibandingkan dengan baku mutu air kelas IV berdasarkan Peraturan Pemerintah Republik Indonesia No. 22 Tahun 2021 tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup, parameter biologi (makroinvertebrata) yang diidentifikasi menggunakan buku elektronik Panduan Pengenalan Invertebrata Kolam dan Sungai Asia Tenggara. Hasil penelitian menunjukkan adanya penurunan kualitas air sungai dengan beberapa parameter uji yang melebihi baku mutu yaitu pH, DO, BOD, COD. Nilai indeks kualitas air di stasiun 1 dan 2 menunjukkan kualitas air tercemar sedang, sedangkan stasiun 3 menunjukkan kualitas air tercemar kotor. Hal ini menjelaskan bahwa pembuangan limbah batu alam yang langsung ke sungai menyebabkan menurunnya kualitas air, salah satunya karena kandungan bahan kimia, seperti unsur logam atau garam yang dapat memengaruhi kualitas air. Dengan demikian, tingkat pencemaran Sungai Cigayam termasuk ke dalam tingkat pencemaran sedang
Pembuatan Lampu Jalan Dengan Suplai Tenaga Surya di Desa Banjarwaru, Kecamatan Nusawungu
No full textBanjarwaru Village is located in Nusa Wungu District and has several hamlets connected to the main road as access to transportation facilities. The lack of street lighting hampers the activities of village residents, especially at night. Road points that do not have public street lighting are far from residents\u27 homes, so they cannot use PLN electricity sources. Seeing the conditions explained above, the need for technology with energy sources that utilize renewable energy such as solar power to supply power to public street lights has been widely implemented. Making street lights with a solar power supply with the application of modern technology is the main priority in this community service activity. The main target objective of this Community Service is the Public Street Lighting Program through the manufacture of street lights with power supply from solar energy. The implementation method in this service is through observation and experiments in the field in the process of designing and manufacturing public street lights and handing over technology transfer to the community. The results of making public street lights with solar energy supply using Arduino Mega which functions to receive data from the LDR sensor and is continued with testing battery charging with solar power. The installation of the LDR sensor will help the efficiency of the lights because it will control the lights to turn on automatically. The results of the manufacture of public street lights also provided assistance and training to the Banjarwaru Village community regarding how the equipment works and the repair process if problems arise in the future
Kinetics of Urea Desorption off Sulfuric Acid Treated Carbon as Slow Release Fertilizer
Get PDFUrea is an important nitrogen source for plant but the price of urea fertilizer is relatively high. Urea uptake from urea manufacture waste water and its application as fertilizer is of high interest. The purpose of this study is to find out desorption ability of urea adsorbed porous carbon to be applied as fertilizer. Theoritically, urea released from porous carbon to environment has slower rate of mass transfer compare to conventional urea fertilizer because urea molecules in porous carbon has to pass through pores of carbon during its movement out of carbon. The porous carbon as adsorbent was made from coconut shell by pyrolysis, followed by sulfuric acid oxidation treatment Oxidation treatment carried out to extent adsorption capacity as well as to give additional sulfur nutrient when applied as fertilizer. Oxidation of carbon surface was performed using sulfuric acid (50%w) to soak porous carbon followed by heating at 90oC temperature for 2 hours. Desorption was conducted by placing porous carbon into beaker contain water and the raising of urea concentration in water recorded after 3,5,10, 30, and 60 minutes. Results reveal that the value of mass transfer coefficient (kc) and effective diffusivity (De) of urea desorption from porous carbon are 0,0293 – 0,0743 cm/s and 8 x 10-10 – 5 x 10-9 cm2/s with initial concentration of urea 1000, 2000, and 4000 mg/L. Release rate of urea from porous carbon and urea prill are 0,07 ppm/s and 1,23 ppm/s. Slower release rate of urea off porous carbon than urea prill shows the promising of urea recovery using porous carbon as slow release fertilizer
Peningkatan Kualitas Tri Dharma Perguruan Tinggi Melalui Pelatihan SISTER Pada STAI Ali bin Abi Thalib
Get PDFSTAI Ali bin Abi Talib is one of the private Islamic universities in Surabaya. There are problems where changes in lecturer data (PDD) and others are still done manually in the form of physical files that are brought to Kopertais IV which oversees it. Whereas the Directorate General of Science and Technology Resources (SDID) of the Ministry of Research, Technology and Higher Education through circular letter at 2018 has provided direction on the implementation of the Integrated Resource Information System (SISTER) in public and private universiAties. To support this policy, universities need a special party or team to assist the application of technology so that the implementation of SISTER can run well, helping academic activities, data changes, and the tri dharma of lecturers in the future. Community service activities by the Telkom Institute of Technology Surabaya team at STAI Ali bin Abi Thalib were presented and carried out in six stages, starting from literature study, server configuration, preparation of presentation materials and training modules, SISTER application installation process, training, and evaluation. This activity resulted in the SISTER application installed on the STAI Ali bin Abi Thalib server which can be accessed online and also training that provides comprehensive knowledge, skills on the use of the SISTER application and debriefing with 10 video guides and 15 training modules for STAI Ali bin Thalib Surabaya
Blockchain Based Donation Management in Disaster Response
Get PDFBoth natural and man-made disaster leave thousands of people in vulnerable and in need for essential aid. While individuals generously donate resources, traditional donation management systems suffer from limitations. Centralized control, opaque transactions, and potential corruption often hinder aid delivery and leave victims in despair. This paper proposes a novel Ethereum blockchain-based system for transparent and secure disaster donation management. Utilizing smart contracts, the system ensures traceability, accountability, and immutability of donations, empowering donors and fostering trust. This paper presents the system\u27s architecture, detailing its components and interactions through sequence diagrams and algorithms. Additionally, successful testing on the Sepolia Ethereum testnet validates its functionality. To assess its effectiveness, a cost and security analysis is conducted. This blockchain-based framework offers a promising solution for transparent and efficient disaster response, potentially revolutionizing donation management. Further research, particularly on donation allocation optimization within the system holds immense potential for future development