Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal Jurnal Teknik Kimia The Journal of Pure and Applied Chemistry Research Serambi Engineering
Dyah Suci Perwitasari
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
PHOSPHAT ACID AND FLOCCULAN ADDED IN JUICE SUGAR CRYSTAL PROCESS Suci Perwitasari, Dyah
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.v4i2.130

Abstract

The level of the requirement would sugar increased continued each year, in line with thegrowth and the development of the inhabitants as well as technology in Indonesian. To overcomethis lack, a part from with did import sugar was also done by the increase in the sugar industrycame from palm juice sugar. Palm juice sugar was the only main raw material in the productionof crystal sugar for the moment. For produced clear palm juice with the better quality, then mustbe paid attention to by the age, the maturity, the kind, the freshness from the sugar cane croppersonally. The aim of this research was to look for the alternative to the replacement from theprocess sulfitasi that uptil now was worn the sugar factory and to know the optimal condition fromclear palm juice by seeing the dose floculan in accordance with the condition that was undertaken.The process of his research of being raw palm juice was increased lime milk until the alkalinecondition and was heated until the temperature 100 oC, After wards was added by use phosphateacid as the condition that was determined and floculan in accordance with the variable that wasundertaken. Further was bent, refined and analysed. Best results were obtained palm juice withthe increase in phosphat acid the dose 80 mg/l and without floculan that is 91.37 oS; whereas forthe analysis of the content phosphat, turbidy, the colour and the content of the lime were 31,8 mg/l,14,8 mg/l, 2749 ICU, 483 mg/l that is in the increase in the dose of phosphate acid 80 mg/l andfloculan 2 mg/l.Keywords :Phosphat acid, floculan, palm juice sugar.
UTILIZATION OF SOLID WASTE LEATHER INDUSTRY AS RAW MATERIAL MAKING SOAP Suci Perwitasari, Dyah
Jurnal Teknik Kimia Vol 5, No 2 (2011): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v5i2.147

Abstract

With the increase in the development of technology, then today often products from a factorythat various forms in the market in order to satisfies the consumer. For example was the number of soapproducts that emerged. Because of that as the new alternative that is looking for the alternative base forthe production base of soap. The alternative that will be developed was the production of soap from thatis fat. This research was to make laundry detergent by making use of the waste of the skin industry. Wasbased on results of the analysis it was known the best condition was achieved at the time of the increase7 gram and the increase KOH 15 gram with the level of free alkali 0.094 %, fat not 1.80 %, and thenumber fatty acid 68.7 %. Meaning that at the moment the condition for the quality of laundry detergentbased on the Standard of Nasional Indonesia could be filled.Key words: solid waste , skin industry,KOH, fatty acid, soap.
Conversion of Magnesium from Bittern with Sodium Phosphate Addition through Precipitation Process Dodik Hendra Saputra; Evlyansa Bunga Rizka Ananda; Dyah Suci Perwitasari; Caecilia Pujiastuti
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

Bittern, a by-product of the salt production process, contains high concentrations of magnesium ions, which have significant economic potential and use value in various fields. The objective of this study is to recover magnesium from bittern using sodium phosphate (Na₃PO₄) through the process of chemical precipitation. The reaction between magnesium and phosphate produces magnesium phosphate compounds, which are commercially valuable in the industrial and agricultural sectors. The present study analysed the effect of several process parameters, including pH, temperature and reaction time, on magnesium recovery efficiency. Optimum conditions were obtained at pH 9 with the addition of a 15% concentrated Na₃PO₄ solution. The precipitate formed was then characterised using X-Ray Fluorescence (XRF) to confirm the presence of magnesium phosphate. The findings demonstrate that this method facilitates the effective recovery of magnesium from bittern, exhibiting both high efficiency and good selectivity. This approach has the potential to provide a sustainable solution for the treatment of bittern effluent, whilst concomitantly producing environmentally friendly value-added products.
Impact of Thermal Properties on the Swelling Behavior of Polymer Composites Reinforced with Silica Xerogel Fauziyah, Nur Aini; Fina Nidha Ulmu Fidha; Meiska Diah Kusumawardani; Putri Catur Kusumaningtyas; Primasari Cahya Wardhani; Dyah Suci Perwitasari
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 2 (2025): Edition May-August 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

This study investigates the swelling behavior and thermomechanical properties of polyethylene glycol (PEG) and silica xerogel composites using Dynamic Mechanical Analysis (DMA) and Differential Scanning Calorimetry (DSC). The composites were synthesized via a hydrothermal method and prepared by wet mixing PEG with silica xerogel. The analysis revealed that the interaction between PEG and silica xerogel significantly affects both the thermal and morphological properties of the composites. DSC data showed a shift in the glass transition temperature (Tg) and an earlier onset of thermal degradation in the PEG-Silica Xerogel 10 wt.% composite (P-SX10), indicating increased molecular mobility and reduced matrix stability. Notably, the swelling behavior was strongly influenced by temperature: as the temperature increased, the composites exhibited greater expansion and surface degradation, particularly in PEG-rich systems. This thermal sensitivity is attributed to the loosening of polymer–filler interactions and the partial debonding of matrix structures. The findings suggest that both composite composition and thermal exposure play critical roles in determining swelling characteristics and long-term structural integrity. 
Co-Authors Caecilia Pujiastuti Dodik Hendra Saputra Evlyansa Bunga Rizka Ananda Fina Nidha Ulmu Fidha Meiska Diah Kusumawardani Nur Aini Fauziyah Putri Catur Kusumaningtyas