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Tawa, Bibiana D.
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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PEMANFAATAN BATU KARANG-PASIR DALAM PROSES PENGOLAHAN GREYWATER Weking, Maria Y. T.; Tawa, Bibiana D.; Ledoh, Sherlly M. F.; Gauru, Imanuel
Chemistry Notes Vol 1 No 1 (2018): Chem. Notes 2018, 1(1)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v1i1.1573

Abstract

A study of Greywater treatment has been conducted. By utilising vast local coral reefs and sand as filter media, we aimed to treat synthetic waste water in term of reducing its pH, temperature, COD, phosphates and turbidity parameter. The sample was passed gravitationally through 3 variation of filtering agent composition i.e. 1:1, 2:1 and 1:2 of coral reefs to sand ratio respectively in 2 flow rates: 0,4 and 0,8 mL/s. The collected up flow effluent was then analysed. Data resulted were then tested with ANOVA statistical test. The result showed that the mass ratio of the media and the flow rate influenced parameters. The best treatment was obtained at the 1:1 mass ratio in 0,4 mL/s flow rate. The effluent fulfilled the Indonesian water standard quality according to PP No 82 tahun 2001 and PERMENKES No 416/MENKES/PER/1990.
PEMANFAATAN ABU LAYANG (FLY ASH) SEBAGAI ADSORBEN PADA MINYAK JELANTAH Wogo, Hermania Em; Bokay, Ernawati A.; Tawa, Bibiana D.; Ledoh, Sherlly M. F.
Chemistry Notes Vol 2 No 2 (2020): Chem. Notes 2020, 2(2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v2i2.3279

Abstract

A research on the conducted on the use of fly ash as an adsorbent in used cooking oil. This research was conducted with the aim to know the characteristics of fly ash without activation and activation with 6M HCl and to improve the quality of used cooking oil from adsorbent processing based on the Indonesian national standard (SNI). This research was conducted in several stages, namely surface acidity with the titration method, determination of surface area with the blue methylene method, determination of functional groups by FTIR analysis and oil quality based on parameters of acid number, peroxide number and smoke point. The results showed that the acidity of the surface of the fly ash was activated and without activation of 4 and 3.6 m2 / g respectively. surface area of ​​fly ash without activation 17,480 m2/g at contact time 80 and activated fly ash 18,471 m2/g at contact time 70. FTIR spectra of fly ash without activation 795,38 and 779.95 cm-1 and activated 795.38 and 778,02 cm-1 which is a symmetrical stretching adsorption band of symmetric ≡Si-O (≡Si-O-Si≡). Fly ash used for refining used cooking oil (2,468 mg KOH / g) is able to reduce the acid number 0.361 mg KOH / g in activated fly ash and 0.561 mg KOH / g for fly ash without activation, the peroxide number for activated fly ash decreased by 72.34% compared to fly ash without activation 69.14%, oil smoke point purification results from activated fly ash 203ºC and without activation 210ºC which is close to the new oil smoke point value of 200ºC. When compared with SNI, the values ​​of acid numbers, peroxide numbers and smoke points meet the standard.
PENGARUH KOMPOSISI BIOAKTIVATOR KOTORAN SAPI DAN DAUN GAMAL (GLIRICIDIA SEPIUM) DENGAN NUTRISI UBI JALAR TERHADAP KUALITAS KOMPOS Tawa, Bibiana D.; Tnunay, Yarni R.; Suwari, Suwari; Nitbani, Febri O.
Chemistry Notes Vol 2 No 2 (2020): Chem. Notes 2020, 2(2)
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/cn.v2i2.3362

Abstract

A research conducted about effect of bioaktivator of cow feces and gamal (gliricidiasepium) leaves with sweet potato nutrition toward the compost quality. This research hadpurpose to know the compost characteristics of cow`s dung composition and gamal. Thecharacteristic determined to 60% of cow`s dung and 40% gamal leaves used purple sweetpotatoes nutrition and water that made constant. The variation of cow`s dung and gamal leaveswas 90%: 10%, 50%: 50%, 30%: 70%. The research result show that in the 14th days therewere compost characteristics to produce compost based on SNI 19-7030-2004 andrequirements of the minister of agriculture number 70/Permentan/SR.140/10/2011. Thevariations of cow`s dung and gamal leaves did not effect towards C/N ratio compost.
Co-Authors Bokay, Ernawati A. Gauru, Imanuel Hermania Em Wogo Ledoh, Sherlly M. F. Nitbani, Febri O. Suwari Suwari Tnunay, Yarni R. Weking, Maria Y. T.