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All Journal Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Jurnal Pijar MIPA
Umbu, Yohanis
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Energy Engineering Industrial & Manufacturing Engineering Mathematics Physics

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Potensi Asap Cair Sebagai Antioksidan Terhadap Ketengikan Minyak Goreng Pabrikan Yang Aman Bagi Masyarakat Wonga, Maria Yolanda; Umbu, Yohanis
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 2 (2019): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.957 KB)

Abstract

Cooking oil is one of the important needs of the community in meeting their daily needs. The use of repeated cooking oil manufacturers with high heating can lead to oxidation of oil which can cause the composition of the oil to change and produce compounds that have a rancid odor. This study aims to determine the effect of adding liquid smoke to the rancidity of the manufacturer's cooking oil with the most effective volume based on the storage time. Liquid smoke from rice husk is obtained from the pyrolysis process of rice husk which contains components of cellusosa, hemicellulose and lignin which produce phenol compounds, acid compounds and derivatives, which can be used as antioxidants to prevent rancidity in the manufacturer's cooking oil. The parameters used in the analysis of the quality of the manufacturer's cooking oil are the test of the levels of free fatty acids, acid numbers, and peroxide numbers. The results showed that the higher the volume of liquid smoke added, the smaller the increase in levels of free fatty acids, acid numbers and peroxide numbers, the most effective volume of liquid smoke was 27 ml at 1 week storage time
Analysis of the Water Quality of the Iwan River in Darmaji Village, Kopang District, Central Lombok Regency Umbu, Yohanis; Melinda, Tina; Majdi, Muhamad
Jurnal Pijar Mipa Vol. 20 No. 1 (2025)
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.v20i1.8038

Abstract

The Iwan River is one of the rivers in Darmaji Village, Kopang District, Central Lombok Regency. People often use This river for daily life, washing, bathing and irrigating rice fields. People also throw household waste into river water bodies. This hamlet does not yet have clean water and a PDAM network. This research uses the pollution index method to determine the water quality of the Iwan River in Darmaji Village and the water quality status of the Iwan River in Darmaji Village. The research method used is quantitative research with an experimental approach according to Government Regulation Number 22 of 2021 and Water Quality Status with the Pollution Index. Based on the results of the Iwan River water quality, it is still below quality standards, so it is still safe for washing and agricultural activities; namely, in upstream samples, there are TSS results of 0.724 mg/L, temperature 26.8, pH 7, BOD 0.5 mg/L, COD 8 mg/L, oil and fat 1.518 mg/L and total Coliform 24000 MPN/ml while the middle sample had TSS results of 1.574mg/L, Temperature 26.7, pH 6, BOD 1.1mg/L, COD 4mg/L, oil and fat 0.066 mg/L, and total Coliform 930 MPN/ml. In downstream samples, there were TSS results of 1.68 mg/L, Temperature 26.8, pH 7, BOD 0.5 mg/L, COD 12mg/L, oil and fat 0.108mg/L and total Coliform 230MPN/ml and Based on the Pollution Index calculation results, the Iwan River is polluted (lightly polluted) but still safe to use for agriculture.
Co-Authors Wonga, Maria Yolanda Muhamad Majdi Tina Melinda