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All Journal IJCR (Indonesian Journal of Chemical Research) Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
IKA YANTI
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Arts Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences

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CALCULATION OF MEASUREMENT UNCERTAINTY IN ASTM D-4737 CALCULATED CETANE INDEX TESTING AND ASTM D-445 KINEMATIC VISCOSITY IN CEPU PPSDM OIL LABORATORY IKA YANTI; Riska Ayu Larasati
INDONESIAN JOURNAL OF CHEMICAL RESEARCH (IJCR) Volume 7, ISSUE 1, 2022
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol7.iss1.art5

Abstract

Ketidakpastian adalah suatu parameter yang menetapkan rentang nilai yang didalamnya diperkirakan nilai benar yang diukur berada. Konsep ketidakpastian sangat penting untuk hasil pengukuran, karena ketidakpastian menyatakan mutu hasil pengukuran atau pengujian. Pengukuran dan pengujian belum dinyatakan lengkap tanpa nilai ketidakpastian. Semakin kecil nilai ketidakpastian maka semakin akurat dan presisi hasil penelitian atau pengujian yang dilakukan. Tujuan penelitian adalah untuk mengetahui nilai ketidakpastian dari pengujian Calculated Cetane Index ( CCI ) ASTM D-4737 dan Viskositas Kinematik ASTM D-445 di laboratorium PPSDM Migas Cepu. Pada pengujian ketidakpastian pengukuran dengan CCI ASTM D-4737 dan Viskositas Kinematik ASTM D-445 menggunakan solar sebagai sampel, pengujian dilakukan selama 7 hari dengan 2 kali pengulangan uji setiap harinya, dari pengujian tersebut diperoleh hasil perhitungan ketidakpastian dengan pengujian CCI ASTM D-445 yaitu  ± 6,980, dan hasil perhitungan ketidakpastian dengan pengujian Viskositas Kinematik ASTM D-445 yaitu ±0,40. Berdasarkan hasil tersebut data yang diperoleh dapat diterima karena hasil yang diperoleh lebih kecil dari nilai Reproducibility
PEMBUATAN BIOGAS DARI LIMBAH BHO PENYAMAKAN KULIT DENGAN STARTER EFFLUENT DIGESTER AKTIF DAN CO-DIGESTION DENGAN KOTORAN SAPI Swatika Juhana; Prasetyo Hermawan; Wahyu Fajar Winata; Arini Wresta; Ika Yanti
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 19 No 2 (2020): BERKALA PENELITIAN TEKNOLOGI KULIT, SEPATU DAN PRODUK KULIT
Publisher : Politeknik ATK Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (99.407 KB)

Abstract

ABSTRACT This research aims to utilize BHO tannery liquid waste for biogas production and to examine the effect of active digester effluent on the co-digestion of biogas production by co-digestion of BHO liquid waste and cow manure. The experiment began with an analysis of the character of the leather tanning BHO liquid waste. The biogas production is carried out in batches in an anaerobic biogas digester. The experiment was started by entering raw materials for BHO liquid waste: cow dung: active digester effluent with a ratio of D1 = 4: 2: 0; D2 = 4: 0: 2; D3 = 6: 0: 0. Observation of the addition of gas was carried out by means of a manometer to measure the increase in gas pressure produced in the digester every day until the 15th day. The results of the analysis of BHO wastewater showed high BOD and COD levels, namely 3265 mg / L and 11231.2 mg / L. The results of making biogas show increased gas pressure (gas formation) in digester D1 and D2. The result of D1 (BHO waste without starter) gas production is a lot at the beginning and then decreases. In D2 (BHO waste with the addition of starter and cow dung), it shows that gas production is formed on the 8th day with constant pressure until the 15th day and is still producing. In the D3 digester (BHO liquid waste without a starter and cow dung) no gas is formed.
Co-Authors Arini Wresta Prasetyo Hermawan Riska Ayu Larasati Swatika Juhana Wahyu Fajar Winata