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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) Kiryoku: Jurnal Studi Kejepangan
Saputra, Muhammad Ramadhan
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics

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Karakterisasi Dan Analisis Pengolahan Greywater Menggunakan Karbon Aktif Saputra, Muhammad Ramadhan; Andrio, David; Darmayanti, Lita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The growth of population will increase clean water demand. One of several way that can be done is by treating wastewater and reuse it as an alternative source. This research aims to determine the characteristics of greywater and analyze the removal chemical oxygen demand (COD), oil and grease using activated carbon. The result of this study show the COD, oil and grease in 397 mg/L and 152 mg/L. Keywords: Activated Carbon, Greywater
Pemanfaatan Magnetic Biochar dari Cangkang Sawit Sebagai Adsorben untuk Menyisihkan COD, Total Suspended Solid, Minyak dan Lemak dalam Air Buangan Domestik Andrio, David; Saputra, Muhammad Ramadhan; Darmayanti, Lita
Jurnal Penelitian Pendidikan IPA Vol 10 No 3 (2024): March
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i3.4597

Abstract

Greywater is wastewater from domestic activities sourced from kitchens, bathrooms, and laundry water. Greywater discharged directly into the environment can cause a decrease in surface water quality due to its high organic content, nutrients, pathogenic bacteria, and detergents and surfactants. One method that can be used to remove organic and nutrient content is adsorption. The success of the adsorption process is determined by several factors, such as adsorbent type, dosage, contact time, and others. One adsorbent that has attracted the attention of many researchers in recent years is magnetic biochar. This study aims to remove chemical oxygen demand (COD), total suspended solids (TSS), oil, and grease from greywater with a magnetic biochar adsorbent made from palm shells. The study was conducted by varying the dose of 1.2–8.55 g/l and the contact time of 30–150 minutes. The results showed that increasing the dose and contact time can increase the removal efficiency of COD, TSS, oil, and grease. The best results were obtained at a dose of 8.55 g/l and a contact time of 150 minutes. The removal of COD, TSS, oil, and grease was 87.91%, 88.46%, and 99.96%, respectively.
Strategi Pembelajaran Terminologi Bahasa Jepang pada Pekerja Migran Indonesia di Jepang Saputra, Muhammad Ramadhan; Visiaty, Arianty
KIRYOKU Vol 10, No 2 (2026): Kiryoku: Jurnal Studi Kejepangan (On Progress)
Publisher : Vocational College of Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kiryoku.v10i2.379-393

Abstract

Vocabulary mastery is essential for language learning, particularly for understanding terminology in specific fields. Terminology refers to specialized vocabulary used to express specific concepts accurately. For Indonesian migrant workers (PMI) in Japan, mastery of workplace terminology is important for effective communication and improved productivity. To master terminology effectively, learners need appropriate vocabulary-learning strategies. This study aims to identify the types and frequencies of vocabulary-learning strategies used by PMI, especially in learning terminology. The study employed a mixed-methods approach using questionnaires and interviews. The questionnaire was adapted from the Vocabulary Learning Strategy Questionnaire (VLSQ) by Puagsang et al. (2017) and distributed to 122 PMI participants, while interviews were conducted with 9 informants. The findings show that PMI uses various strategies, including social, memory, cognitive, metacognitive, and determination strategies. The most frequently used strategy is translating Japanese vocabulary into Indonesian. The study also found that the use of vocabulary-learning strategies is influenced by PMI’s living and working environments, both of which are second-language environments. These conditions require PMI to develop a strong understanding of Japanese vocabulary and terminology, encouraging them to apply different learning strategies. In addition, continuous exposure to Japanese through workplace communication and reading activities supports their vocabulary acquisition. Therefore, translating Japanese into Indonesian becomes the strategy most commonly used by PMI. 
Co-Authors David Andrio Lita Darmayanti Visiaty, Arianty