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All Journal Jurnal Bahan Alam Terbarukan Jurnal Pijar MIPA Kreasi: Jurnal Inovasi dan Pengabdian Kepada Masyaraka
mulhidin, mulhidin
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Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Social Sciences

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HYDROTHERMAL LIQUEFACTION OF MAHOGANY (Swietenia macrophylla) SAWDUST mulhidin, mulhidin; Yuliansyah, Ahmad Tawfiequrrahman; Prasetya, Agus
Jurnal Bahan Alam Terbarukan Vol 7, No 1 (2018): June 2018 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v7i1.12410

Abstract

Hydrothermal treatment is one of the thermochemical methods to convert complex organic compounds, such as organic waste and biomass, into upgraded solid, bio-oil, and other dissolved chemicals by utilizing the properties of water at near critical condition. Such method is very potential since the process is environmentally friendly and the products have more added values. In this research, conversion of mahogany sawdust (Swietenia macrophylla) using hydrothermal treatment method was studied. The experiments were conducted in a batch autoclave with temperature range of 200-300oC and initial pressure of 1 MPa. At targeted temperature, the process was hold for 30 minutes. In addition, biomass-water ratio (B/W ratio) for experiments was varied at 1:20, 2:20 and 3:20. The liquid products, which were characterized by Gas chromatography-Mass spectrometry (GC/MS) instrument, showed the presence of furfural and several organic acids, but no flavonoid compounds. Thus, coloring potential test of hydrothermal liquid was unsuccessful; there were not any color attached on the cloth specimen. On the other hand, proximate and ultimate test results indicated that solid products had high heating value (HHV) of 4625.34-4876.25 cal/g which were comparable to that of sub-bituminous coal.
Pelatihan Pembuatan Mikroorganisme Lokal (Mol) Untuk Produksi Kompos Skala Rumah Tangga di Desa Darmaji Kecamatan Kopang Kabupaten Lombok Tengah Sholehah, Hijriati; Nurhidayah, Nurhidayah; Mulhidin, Mulhidin; Nurhidayatullah, Nurhidayatullah; Munir, Muhammad
Kreasi: Jurnal Inovasi dan Pengabdian kepada Masyarakat Vol. 4 No. 2 (2024): Agustus
Publisher : BALE LITERASI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58218/kreasi.v4i2.926

Abstract

Sampah yang timbul dari aktivitas yang dilakukan manusia semakin bertambah volumenya seiring meningkatnya populasi penduduk, tingkat konsumsi, serta kemajuan teknologi. Sampah rumah tangga merupakan salah satu sumber sampah yang cukup besar peranannya dalam peningkatan volume sampah di suatu lingkungan sehingga perlu melakukan pengolahan sampah organik dengan mengolahnya menjadi kompos (pupuk organik). Limbah organik yang dihasilkan bersumber dari limbah pertanian, perkebunan dan rumah tangga. 40% limbah organik tersebut belum termanfaatkan dengan optimal, karena terkendala pada tingkat kesadaran, tingkat pengetahuan dan ekonomi masyarakat, sehingga dengan melakukan edukasi dan pelatihan memanfaatkan limbah organik untuk membuat Mikroorganisme Lokal (MOL) sebagai aktivator pupuk organik pada KWT, merupakan alternatif untuk meningkatkan pengetahuan KWT , sehingga dapat mengedukasi masyarakat agar tidak melakukan pembakaran sampah, dan agar tetap menjaga kelestarian lingkungan serta dapat dikembangkan untuk meningkatkan ekonomis masyarakat.Metode yang digunakan dalam kegiatan ini adalah metode praktikum secara langsung dan metode ceramah.sehingga diperoleh Mol dari nasi dan bonggol pisang.Pemakaian pupuk organik yang dikombinasikan dengan mol dapat menghemat penggunaan pupuk kimia hingga 400 kg per musim tanam pada 1 ha sawah. Waktu pembuatan relatif singkat dan cara pembuatannya mudah. Selain itu mol juga ramah lingkungan
Analysis of Pollutant Sources from Community Health Center Activities in Mataram City Nurhidayah, Nurhidayah; Sholehah, Hijriati; Nurhidayatullah, Nurhidayatullah; Mulhidin, Mulhidin; Abdullah, Taufik
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i6.8003

Abstract

Health centers are health service facilities that produce waste containing microorganisms, toxic chemicals and radioactive materials that are dangerous and can pose risks to health and the environment. The purpose of this study was to determine the sources of health center waste and the types of waste from health center activities. This research method is a type of cross-sectional study, and data collection is done by filling out a questionnaire. The results of the study are the sources of health center waste, namely from the activities of the dental clinic, laboratory, Maternal and Child Health room, and the Emergency Unit room. The types of health center waste are liquid, domestic, solid medical, and toxic and hazardous. For the processing of liquid waste, all health centers in Mataram City have adequate wastewater treatment plants, either with a biofilter wastewater treatment plant system or other types of wastewater treatment plants, from 11 health centers, which have carried out sorting and have temporary storage places, namely 8 health centers. The process of managing medical waste involves sorting, transportation, storage and final processing with a third party. The weak point of B3 waste management is in the recording and sorting system of B3 solid waste and routine reporting of environmental management efforts and environmental monitoring efforts to related agencies that have not been able to be carried out by all existing health center agencies.
Analysis of Seawater Quality in the Villa Ombak Gili Terawangan Area, Pemenang District Nurhidayah, Nurhidayah; Sholehah, Hijriati; Nurhidayatullah, Nurhidayatullah; Mulhidin, Mulhidin; Azwaruddin, Azwaruddin
Jurnal Pijar Mipa Vol. 20 No. 4 (2025): Special Issue
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i4.9023

Abstract

Tourism is one of the most rapidly growing sectors globally and plays a vital role in regional development by contributing to foreign exchange earnings, job creation, and poverty alleviation. Gili Trawangan, a small island in West Lombok, is a popular marine tourism destination experiencing rapid growth in tourist visits and supporting infrastructure, such as hotels and restaurants. This growth has led to increased population density and higher environmental pressures, particularly in the form of liquid waste and pollutants entering coastal waters. If not properly managed, these pollutants can degrade water quality and marine ecosystems. This study aims to assess the quality of seawater in the Villa Ombak area of Gili Trawangan, located in Pemenang District. A quantitative research method was applied, with seawater samples collected from six stations using the Niskin bottle method at a depth of one meter. Parameters analyzed included physical (temperature, total suspended solids/TSS), chemical (pH, salinity, dissolved oxygen/DO, ammonia-N/NH₃-N, nitrate-N/NO₃-N, phosphate/PO₄, oil and fat), and biological (total and faecal coliform) characteristics. Laboratory analysis was conducted at the Mataram PUPR Laboratory, and results were compared to the Indonesian Government Regulation (PP) No. 22 of 2021 on seawater quality standards. The findings showed that all measured parameters met the required quality standards for marine tourism and biota. Recorded values included a temperature of 29°C, TSS 2.5 mg/L, pH 8.2, salinity 33 PSU, DO 6.9 mg/L, NH₃-N 0.019 mg/L, NO₃-N 0.0017 mg/L, oil and fat <0.03 mg/L, total coliform 185 MPN/100 mL, and faecal coliform 0 MPN/100 mL. Although still within safe limits, ongoing monitoring and environmental management are essential to prevent ecological degradation and to ensure the sustainability of marine tourism in the area.
Co-Authors Agus Prasetya Ahmad Tawfiequrrahman Yuliansyah Azwaruddin, Azwaruddin Ida Ayu Putu Sri Widnyani Muhammad Munir Nurhidayah Nurhidayah Nurhidayatullah Nurhidayatullah, Nurhidayatullah Sholehah, Hijriati