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All Journal Eksergi Seminar Nasional Teknik Kimia Kejuangan
Faizah Hadi
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science

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Efek Pretreatment Ultrasonikasi Terhadap Hidrolisis Enzimatis Spirulina platensis Residue Indriana Lestari; Heni Anggorowati; Faizah Hadi
Eksergi Vol 18, No 1 (2021): Vol 18, No. 1 (2021)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v0i0.4559

Abstract

The development of renewable energy from microalgae sources is still being studied to overcome the world energy crisis, one of which is biodiesel from Spirulina platensis. However, the extraction process from Spirulina platensis to obtain oil leaving waste called Spirulina platensis residue (SPR). SPR still contains carbohydrates in the form of cellulose in cell walls and starch in plastids. Carbohydrates can be converted into bioethanol through the hydrolysis process. To optimize the enzymatic hydrolysis of carbohydrates, pretreatment is needed to break down the cell walls. One method of pretreatment is ultrasonication. This study aimed to determine the effect of ultrasonication pretreatment on enzymatic hydrolysis. Ultrasonication was carried out with time variations (15, 30, and 45 minutes) then continued hydrolysis at 40 oC for 8 hours using α-amylase and glucosidase (1: 1) enzymes. The results of hydrolysis in the form of reducing sugars were analyzed using the Nelson Somogyi method and obtained an optimal pretreatment time is 30 minutes with a reducing sugar concentration of 2.493,3 mg/L
ESTER ASAM KARBOKSILAT DAN ISOPROPIL ALKOHOL UNTUK BAHAN DASAR BIOPELUMAS Mahreni Mahreni; Faizah Hadi; Renung Reningtyas; Gemal Kurniawan; Maulana Fahdlurahman Al Abdillah
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

ESTERIFICATION OF OLEIC ACID, STEARIC ACID AND ISOPROPIL ALCOHOL FOR LUBRICANT BASE.Uncontrolled spill of petroleum base lubricant has been polluted the environment. An alternative of biodegradable and environmental friendly lubricant is needed to substitute petroleum based lubricant. Biolubricant can be made from plant or animal oil, or synthetic lubricant that meets biodegradability criteria and nontoxic to human and environment. The aim of this research is to produce ester from Oleic acid, Stearic acid and Isopropyl alcohol as a base stock for lubricant. Range of time in reaction was set 3,4, and 5 hour. Stearic acid was varied 11-15 gram, Oleic acid 85- 89 ml, and IPA 10-15 ml. The resulting products of ester were confirmed by FTIR. Kinematic viscosity, Pour point, Freezing pont are evaluated by ASTM analyses. Ester produced from 12 gr oleic acid, 88 ml of oleic acid and 5 mil of IPA at room temperature is still in liquid phase, with kinematic viscosity at 100oCis larger than 4,099 mm2/s, Pour point 24oC and Freezing point = 12oC.This ester is potential to be used as biolubricant base stock.
Comparison of the Use of NaOH and KOH Activators in the Manufacture of Activated Carbon from Cassava Peel (Manihot utilissima) Mitha Puspitasari; Wibiana Wulan Nandari; Faizah Hadi
Eksergi Vol 19, No 2 (2022)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v19i2.7245

Abstract

Cassava (Manihot utilissima) is a staple food beside rice and corn for Indonesia people. Cassava peel is a waste of cassava processing agroindustries such as  tapioca flour industry, fermentation industry, and staple food industry. This waste contains a fairly high carbon element of 59,31%. Cassava peel has the potential to be used as raw material for activated carbon because of its high carbon content. Activated carbon production involved some steps such as preparing raw materials, carbonization, activation, neutralization, and analysis of water content, ash, iodine number, and analysis of the pore surface area of activated carbon. Activated carbon was activated using NaOH and KOH with concentrations of 0.1; 0,2; 0,3; 0,4; and 0,5N. The results showed that activated carbon which activated with 0,4N NaOH and 0,5N KOH provided the closest parameter with SNI 06-3730-1995 standard. The use of NaOH activator can increase the surface area of activated carbon compared to KOH activator.
Mass Transfer Coefficient of Extraction of Anthocyanin from Mangosteen Peel (Garcinia mangostana L.) with Ethanol-HCl as Solvent Zubaidi Achmad; Faizah Hadi; Siti Diyar Kholisoh
Eksergi Vol 19, No 3 (2022)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v19i3.8008

Abstract

Anthocyanin is a natural pigment that causes the purple skin of the mangosteen fruit. This study aimed to observe the effect of temperature, stirring time, and ethanol concentration in ethanol–HCl solvent on anthocyanins produced from the mangosteen peel extraction process and determine the value of its mass transfer coefficient. The laboratory work was conducted with mangosteen peel powder extracted with ethanol solvent containing 1% HCl solution using an extraction apparatus set. The mangosteen rind is cleaned and then mashed until it passes the size of -60+80 mesh. Then 50 g of mangosteen rind powder was put into a three-neck flask along with ethanol solution with various concentrations of 55%, 65%, 75%, 85%, and 95%, each containing 1% HCl. Extraction was carried out at various stirring times of 3, 4, 5, 6, and 7 hours with temperature variations of 30, 40, 50, 60, and 70oC. Each product was distilled at a temperature of <60oC. Anthocyanin content were analyzed by spectrophotometric method. The results showed that the optimum conditions at the extraction temperature of 50oC with stirring time for 4 hours and 95% ethanol concentration in ethanol–HCl solvent with anthocyanin content obtained of 9,8377.10-4 (g anthocyanin/g solvent) and kC of 0,00781 g/(cm2.hour).
Co-Authors Gemal Kurniawan Indriana Lestari Mahreni Mahreni Maulana Fahdlurahman Al Abdillah Mitha Puspitasari Renung Reningtyas Siti Diyar Kholisoh Wibiana Wulan Nandari Zubaidi Achmad