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All Journal Jurnal Teknik Kimia Jurnal Fisika Unand Journal of Applied Science, Engineering, Technology, and Education Serambi Engineering Indonesian Journal of Chemical Science
Sintha Soraya Santi
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Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Other

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KAJIAN PEMANFAATAN LIMBAH NILAM UNTUK PUPUK CAIR ORGANIK Soraya Santi, Sintha
Jurnal Teknik Kimia Vol 2, No 2 (2008): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v2i2.93

Abstract

Waste of the distillation of pogestemon cablin still havet high nutrient content and potentialas a good raw material of organic fertilizer . Rapid composting technology and efficient organicfertilizer will produce high quality compost. This study aim to determine the best conditions in termsof fermentation time 6,10,14,18,22 day and volume of bacteria (EM4): 2,4,8,10% EM4/solution wereadded to the N, P, K most in the process of making liquid fertilizer to use waste leaves the distillationof pogestemon cablin of N, P and K respectively 10.6% weight, 1.19% and 3.08% heavy weight andthe volume EM4 8% and the fermentation time of 14 days.Key words : pogestemon cablin, fermentation, ,liquid organic fertilizer, nitrogen,kalium, phospor
KAJIAN PEMANFAATAN LIMBAH NILAM UNTUK PUPUK CAIR ORGANIK DENGAN PROSES FERMENTASI Soraya Santi, Sintha
Jurnal Teknik Kimia Vol 4, No 2 (2010): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v4i2.133

Abstract

Waste of the distillation of pogestemon cablin still havet high nutrient content andpotential as a good raw material of organic fertilizer . Rapid composting technology and efficientorganic fertilizer will produce high quality compost. This study aim to determine the bestconditions in terms of fermentation time 6,10,14,18,22 day and volume of bacteria (EM4):2,4,8,10% EM4/solution were added to the N, P, K most in the process of making liquid fertilizerto use waste leaves the distillation of pogestemon cablin of N, P and K respectively 10.6% weight,1.19% and 3.08% heavy weight and the volume EM4 8% and the fermentation time of 14 days.Key words : pogestemon cablin, fermentation, ,liquid organic fertilizer, nitrogen,kalium, phospor
PENURUNAN KOSENTRASI SURFACTAN PADA LIMBAH DETERGEN DENGAN PROSES PHOTOKATALITIK SINAR UV Soraya Santi, Sintha
Jurnal Teknik Kimia Vol 4, No 1 (2009): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v4i1.123

Abstract

Photokimia have used as by many alternative processing of water. Photokimia reaction is reaction of chemistry which is induction by light either trough indirect and also direct. Conversion ofr Energy light become chemical energy or electrics represent elementary principle of photokimia. To quicken reaction of conversion needed by the existence of catalis reffered as catalis system. Catalis will be active if obtaining light energy. In course of fotokimia will be formed by radical hydroxyl to degrade compound of organic underwater of waste like surfactant. The research dergradation of concentration surfactant used Titanium Dioxide catalis with light source the used is lamp of UV which variation of 15 watt, 30 watt and 36 watt. The objective of research to determine abilitry degradation of concentration of surfactant in waste of detergent. Result of research indicate that ability of degradation of be concentration use TiO2 counted 2,2 gr with result 96,5 %, time of radiating 2,5 hour and lamp energy 36 watt. Key words :Photokimia, Photokatalitik, Surfactan 
The Influence of Nutrient Types and Starter Concentration of Clostridium acetobutylicum in Fermentation of Pineapple Peel into Bioethanol Sania, Nabilla; Silvy Indah Safitri; Sintha Soraya Santi
Indonesian Journal of Chemical Science Vol. 13 No. 2 (2024): Indonesian Journal of Chemical Science
Publisher : Prodi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v13i2.3853

Abstract

Bioethanol is an alternative energy source that can be used to reduce dependence on fossil fuels. This study aims to produce bioethanol from pineapple peel waste using Clostridium acetobutylicum bacteria with initial pre-treatment to separate cellulose and lignin. The research methods include raw material preparation, delignification, hydrolysis, and fermentation. The results show that pre-treatment with NaOH solution successfully reduces lignin content in pineapple peels, while hydrolysis using HCl solution increases glucose content. Fermentation with variations in starter concentration and nutrient type resulted in the highest bioethanol content of 4% with the use of urea nutrient and 7% starter concentration. GC-FID analysis indicates that besides ethanol, methanol is also detected as a by-product. In conclusion, Clostridium acetobutylicum bacteria can be used to produce bioethanol from pineapple peel waste, with the concentration of starter and nutrient type influencing the ethanol content produced.
Optimization of Edible Straw Characteristics from Kimpul Taro Starch and Patin Fish Skin Gelatin with Sorbitol Addition Tasya Vyra Putri Ariyani; Amalia Azzahroh; Sintha Soraya Santi
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The pervasive contamination resulting from plastic straw usage has necessitated the development of a resolution to address this predicament. One potential avenue for exploration is the development of an environmentally sustainable edible straw. The objective of this study is to design and evaluate the optimal materials and characteristics of an edible straw that complies with the Japanese Industrial Standard, which serves as an international benchmark. The independent variables employed in this study encompass the ratio of kimpul taro starch and catfish skin gelatin, along with sorbitol. These variables were analyzed using Central Composite Design (CCD) and Response Surface Methodology (RSM), with the assistance of Design Expert 13 software. The edible straw was produced through a mixing and casting process, using a ratio of catfish skin gelatin to kimpul taro starch of 5:5; 4:6; 3:7; 2:8; 1:9, along with the addition of plasticizers at varying concentrations of 0%; 0.4%; 0.8%; 1.2%; and 1.6%. The characteristics that were the focus of the analysis included thickness, tensile strength, elongation, solubility, and biodegradation rate. The findings of this study suggest that the edible straw under consideration is in accordance with the Japanese Industrial Standard and is deemed safe for utilization and ingestion.
Kajian Pengaruh PH dan Berat Kertas Terhadap Sintesis dan Karakteristik Silika Fiber dari Limbah Kertas HVS dan Kardus dengan Metode Sol Gel Ardya Pramesti Regita Cahyani; Foni Putri Sandi; Sintha Soraya Santi
Jurnal Fisika Unand Vol 14 No 5 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.5.428-434.2025

Abstract

The conversion of paper waste into silica fiber represents a strategic effort to reduce environmental pollution while adding value to HVS and cardboard waste. This study aims to examine the effect of pH and paper waste weight variations on the synthesis process and the characteristics of silica fiber produced using the sol-gel method. HVS and cardboard waste were used as cellulose sources, combined with sodium silicate and methanol. The variables tested included pH (3–7) and paper weight (8, 10, and 12 grams). Characterization involved density analysis, functional group identification using FTIR, and thermal stability assessment via TGA. The optimum condition for HVS waste was achieved at pH 5 with 8 grams, yielding a density of 1.8946 g/cm³, while for cardboard it was at pH 5 with 12 grams, yielding a density of 2.0228 g/cm³. Silanol and siloxane groups were identified in the FTIR spectra, and TGA results indicated good thermal stability at high temperatures. It can be concluded that variations in pH and paper waste weight significantly affect the formation and properties of the resulting silica fiber.
Effect of Additional Cellulose Bacterial from Nata De Soya and Chitosan in Bioplastic Manufacturing Nelvira Juanmara Ardyansa; Ari Suwito Putra Ramadhon; Sintha Soraya Santi
Journal of Applied Science, Engineering, Technology, and Education Vol. 4 No. 2 (2022)
Publisher : PT Mattawang Mediatama Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.879 KB) | DOI: 10.35877/454RI.asci1133

Abstract

Plastics are synthetic polymers from petroleum or petrochemicals that are difficult to biodegrade by bacteria and microbes. Non-biodegradable plastics cause the accumulation of large amounts of plastic waste Solutions that can reduce plastic waste by making plastics that are easily biodegradable. In this study, tofu liquid waste is used as a basic material for the manufacture of bioplastics. Tofu liquid waste is waste generated from tofu production. This study aims to determine the effect of adding bacterial cellulose and chitosan on the manufacture of bioplastics from liquid waste tofu (whey) in terms of tensile strength, elongation, water solubility, and functional groups (FTIR) in accordance with PET plastic standards (Polyethylene terephthalate). The research procedure on the effect of adding bacterial cellulose and chitosan on the bioplastic fabrication of Nata De Soya. First, from tofu liquid waste, Acetobacter Xylinum starter was added and then fermented for 10-12 days to become Nata De Soya. After that it was neutralized with aquadest, removed the water by pressing, and dried to become bacterial cellulose. The process of making bioplastic with the addition of chitosan (grams) 2,3; 3.1; 3.9; 4.7 and 5.5 and bacterial cellulose (grams) 0.5 ;1.5; 3.9; 7; and 11. In the manufacture of bioplastics with the addition of Bacterial Cellulose and chitosan, it is appropriate, namely the tensile strength obtained will increase and the solubility in water decreases. From the results of our research, the best results were obtained in the addition of S5K5 with a tensile strength value of 9.665 MPa, an elongation value of 31.3%, and a solubility value in water of 17.9%. It has a higher tensile strength, smaller elongation and lower water solubility. The effect of the addition of chitosan on the tensile strength value can increase the tensile strength (Tensile Strength Value), the addition of bacterial bacterial cellulose and chitosan can affect the elongation of bioplastics getting smaller and the effect of chitosan can reduce solubility in water. It is good but still far from the standard PET (Polyethylene Terefelat) which is 60-80 Mpa.
Co-Authors Amalia Azzahroh Ardya Pramesti Regita Cahyani Ari Suwito Putra Ramadhon Foni Putri Sandi Nelvira Juanmara Ardyansa Sania, Nabilla Silvy Indah Safitri Tasya Vyra Putri Ariyani