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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Biologi Tropis Indonesian Journal of Engineering (IJE)
Astrini Widiyanti
Universitas Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Engineering Immunology & microbiology

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Determining Water Quality Status and Assimilation Capacity of Pollutant Loads in West Lombok Regency M Said Ramdlan; Astrini Widiyanti; Hilman Rizkiadi; Muhamad Arif Sidiq; Khaerul Ihwan
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 2 (2024): July 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i2.419-432

Abstract

Babak watershed is one of the essential watersheds in Lombok Island providing water supply for irrigation, fish pool, drinking water supply, and micro-hydro power plant. Excessive human activities degrade the water quality of Babak watershed, and more pollutants are present in the water column. Thus, this study aims to determine Babak watershed's water quality status and assimilating capacity to plan effective and holistic mitigation measures properly. The study calculates the pollution index (PI) using a formula based on the Minister of Environment No.115/2003 Decree and assimilating capacity (AC) based on the Minister of Environment No.110/2003 Decree. The results found that Babak watershed is lightly polluted, defined by exceeding chemical parameters such as DO, total phosphate, nitrite, and dissolved iron (Fe). Similarly, these parameters (total phosphate, nitrite, and Dissolved iron (Fe) also reached the maximum assimilation capacity of Babak watershed to contain and self-purify these pollutants from the water column. Thus, planning mitigation and adaptation measures are required to prevent further contaminations in this watershed.
Pengaruh Ketebalan Media Filter Zeolite, Debit Dan Waktu Tinggal Terhadap Sifat Fisik Air Limbah Cucian Piring Rahmat Ali; Isnan Patoni; Habibah Maryani; Ahmad Efendi; Muhammad Zaril Gaffar; Astrini Widiyanti
Indonesian Journal of Engineering (IJE) Vol. 4 No. 1 (2023): Edisi September
Publisher : Fakultas Teknik Universitas Nahdlatul Ulama Nusa Tenggara Barat

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Abstract

Abstrak: Limbah Air Cucian Piring merupakan campuran dari berbagai bahan, dan polutan yang berasal dari sisa sisa mencuci alat masak danlain lain. Saat ini hampir semua orang membuang air cucian piring tersebut. Sifat fisik kekeruhan adalah sifat optik yang terjadi akibat hamburan cahaya oleh partikel yang menyebar di dalam air membentuk koloid yaitu suatu cairan yng memiliki partikel yang menyebar. Adapun tujuan dari penelitian ini adalah (1) Untuk mengetahui pengaruh media filter zeolit terhadap penurunan parameter fisik pada air cuci piring, (2) Untuk mengetahui pengaruh waktu tinggal terhadap penurunan parameter fisik limbah air cuci piring dan (3) Untuk mengetahui pengaruh ketebalan media filter terhadap penurunanparamerter fisik limbah air cuci piring. Penelitian eksperimen yaitu untuk mengetahui tingkat penurunan tingat kekeruhan pada air limbah cucian piring dengan menggunakan filtrasi downflow degan komposisi media pasir zeolite dengan variasi ketebalan 2 cm, 4 cm, dan 6 cm. Abstract: Dishwashing water waste is a mixture of various materials, and pollutants that come from the rest of washing cooking utensils and others. Nowadays almost everyone throws away the dishwashing water. The physical property of turbidity is an optical property that occurs as a result of the scattering of light by particles that disperse in water to form a colloid, which is a liquid that has dispersed particles. The aims of this study were (1) to determine the effect of zeolite filter media on decreasing physical parameters in dishwashing water, (2) to determine the effect of residence time on decreasing physical parameters of dishwashing water waste and (3) to determine the effect of filter media thickness on the decrease in the physical parameters of dishwashing water waste. Experimental research is to determine the level of turbidity reduction in dishwashing wastewater using downflow filtration with zeolite sand media composition with thickness variations of 2 cm, 4 cm, and 6 cm.
Analysis of Inorganic Waste Material Flow for Zero Waste Achievement Scenarios on the Mataram University Campus Annisa Annisa; Suripto Suripto; Astrini Widiyanti; Ernawati Ernawati
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.11806

Abstract

Waste management at the University of Mataram still uses the traditional scenario, namely collecting, transporting and disposing of it at the landfill so that it has not made a real contribution to reducing waste generation in Mataram City. This study aimed to determine the generation, composition, and potential for reducing inorganic waste on the Mataram University campus.  Data on inorganic waste generation and its composition were collected using the load count method according to ASTM D5231-92 and SNI 19-3964-1994. The data were then processed through Material Flow Analysis (MFA) with the 3R approach. The results showed that the inorganic waste generated on the Mataram University campus reached 431.09 kg/day (0.0208 kg/person/day), and after being collected by scavengers (average 149.09 kg/day), residue of 282.01 kg/day (65.43%) was left, with the composition dominated by paper (32.78%) and plastic (32.40%). The potential for reducing inorganic waste per day reached 186.43 kg, namely through reduce (86.8 kg), recycle (98.81 kg), and reuse (0.82 kg), leaving a residue of 95.59 kg (22.17%).  The new scenario for waste management with the implementation of the 3Rs approach can significantly reduce the generation of inorganic waste, thereby supporting efforts to achieve zero waste on the Mataram University campus.
Co-Authors Ahmad Efendi Annisa Annisa Ernawati Ernawati Habibah Maryani Hilman Rizkiadi Isnan Patoni Khaerul Ihwan M Said Ramdlan Muhamad Arif Sidiq Muhammad Zaril Gaffar Rahmat Ali