Lack of awareness and knowledge of environmental protection, many people discard cooking oil waste. According to several studies, cooking oil waste can be processed into more valuable products through certain processes that require energy and material. Biodiesel is an example. Beside biodiesel, the production process also produces non-product output. Thus, efforts to utilize cooking oil waste into more valuable products also have a negative impact on the environment. This study aims to measure the environmental impact of biodiesel production from waste cooking oil and compare it if it is discharged to landfill without the recycling process. Measurement of environmental impacts is carried out using a Life Cycle Assessment. Measurement of the environmental impact of biodiesel processing from cooking oil waste is based on a process carried out at a research institute. The measurement results state that the disposal of cooking oil waste has an adverse effect on the ecotoxicity category. Whereas the processing of cooking oil waste into biodiesel has advantages in the categories of climate change, the formation of photochemical oxidants, fine dust, oil and gas depletion, and water pressure indicators. the level of eco efficiency from processing waste cooking oil to biodiesel produces a value close to one which means that the production process is affordable but not yet sustainable.

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Most waste cooking oil (WCO) in Semarang is still disposed of in landfills since there is an inadequate facility to collect those wastes. There are only three collection centers of WCO identified in Semarang. The alternative to sell WCO is also not the best option as the amount of WCO generated from households is less than the culinary enterprise. Thus, having a collection channel that can thoroughly cover all the supply points of WCO from the household in Semarang is a necessity. This research will design a collection channel to provide facilities so the waste can be appropriately managed. The analysis determines the number, location and capacity of each collection center, standard operating procedure of WCO collection, and the picking route. The number, location, and breadth of the collection center are determined using Maximal Covering Location Problem. The finding shows that to facilitate all the potential supply of WCO in scenario 1 with a range of 2 km mileage need 95 collection center. In contrast, in scenario 2, a distance of 1 km requires a collection center of 146 points. Previously, this study began by identifying community behavior towards waste cooking oil by surveying 347 households.

Penelitian yang dilakukan bertujuan untuk mengembangkan media pembelajaran dengan kriteria yang valid, praktis dan efektif dalam bentuk game edukasi yang berjudul “Math Space Adventure” dengan sasaran kelas IV SD pada materi pecahan. Game dikembangkan melalui aplikasi construct 2 dengan model pengembangan ADDIE yaitu Analysis, Design, Development, Implementation, dan Evaluation. Metode penelitian yang digunakan dalam penelitian ini adalah metode penelitian pengembangan (RnD) dengan instrumen penelitian berupa lembar validasi untuk ahli media, lembar validasi untuk ahli materi, angket respon guru, pretest dan posttest hasil belajar siswa. Hasil penelitian secara umum menggambarkan bahwa game Math Space Adventure telah memenuhi kriteria valid, efektif dan praktis sebagai media pembelajaran materi pecahan bagi siswa kelas IV di MIN 2 Kediri. Hasil uji kevalidan adalah media masuk dalam kategori valid berdasarkan penilaian dari ahli materi dan ahli media. Berdasarkan hasil nilai pretest dan posttest, penerapan game Math Space Adventure dapat meningkatkan presentase hasil belajar sebesar 32,79% sehingga dikatakan efektif.  Berdasarkan hasil analisa angket kepraktisan guru diperoleh hasil bahwa tingkat kepraktisan produk mendapatkan skor 80,9% dengan kriteria sangat praktis. Sehingga, dapat disimpulkan bahwa game edukasi “Math Space Adventure” layak dijadikan media pembelajaran karena memenuhi aspek keefektifan, kevalidan, kepraktisan dan dapat meningkatkan ketercapaian hasil belajar siswa.

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