Article Per Year (5 Year)
p-Index From 2021 - 2026
5.066
P-Index
This Author published in this journals
All Journal TEKNIK JURNAL KIMIA SAINS DAN APLIKASI JURNAL TEKNOLOGI LINGKUNGAN CHEMICA Jurnal Teknik Kimia Jurnal Teknologi Pangan Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Majalah Ilmiah MOMENTUM Journal Of Chemical Process Engineering (JCPE) Turbo : Jurnal Program Studi Teknik Mesin Jurnal Teknik Kimia Jurnal Metalurgi dan Material Indonesia RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi Jurnal Abdi Insani JURNAL FLYWHEEL International Journal Of Science, Technology & Management (IJSTM) International Journal of Eco-Innovation in Science and Engineering (IJEISE) Jurnal Pengbdian Teknik Mesin Biomedical and Mechanical Engineering Journal Innovative: Journal Of Social Science Research Maddana: Jurnal Pengabdian Kepada Masyarakat Journal Of Chemical Process Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN RADIAL: Jurnal Peradaban Sains, Rekayasa dan Teknologi
Luluk Edahwati
UPN Veteran Jawa Timur
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Transportation Other

Published : 47 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 47 Documents
Search

 1   2   3   4   5 
PELATIHAN PENGOPERASIAN ALAT PENGHANCUR DAN PENGADUK KOTORAN HEWAN (KOHE) TERINTEGRASI DI CV TIGA LIMA JAYA DESA JAJAR GUMREGAH lestari, Wahyu Dwi; Edahwati, Luluk; Harya, Gyska Indah
Jurnal Abdi Insani Vol 11 No 4 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i4.1789

Abstract

Training on the use of an integrated animal manure crusher and mixer (KOHE) at CV Tiga Lima Jaya aims to improve the efficiency of animal manure management as an ingredient for making organic fertilizer and employee skills. This training includes basic theory of machine operation, practical demonstrations, maintenance, and troubleshooting. The method of implementing this community service activity includes preparation, implementation, and evaluation or follow-up. The results of the training showed an improvement in employee knowledge and skills, with an increase in theory evaluation scores from 55% to 90% and 88% and employees were able to operate the machine independently. Operational efficiency improved, KOHE processing time from 5 hours to 2 hours per day, and processing capacity increased by 50%. The training also contributed to the SDGs, specifically in clean and affordable energy (SDG 7), decent work and economic growth (SDG 8), and industry, innovation and infrastructure (SDG 9). Future recommendations include continuous training, environmental impact measurement, cooperation with educational institutions, implementation of new technologies, and infrastructure improvements.
PERENCANAAN COLD STORAGE SEBAGAI PENYIMPANAN UDANG VANAME DAERAH DI KABUPATEN POHUWATO PROVINSI GORONTALO Pido, Rifaldo; Gobel, Fendy Faizal; Edahwati, Luluk
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 11 No. 1 (2023): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v11i1.352

Abstract

This study describes the calculation of cold storage analysis for planning the preservation of vannamei shrimp in Pohuwato Regency. The purpose of this paper is to calculate the cooling load on frozen fish cold storage, calculate the performance of the vapor compression cycle including mass flow rate, compressor power, and COP. This study uses a theoretical design method. Cold storage design for product storage. The design data was obtained from field observations. The calculation results showed that the Refrigerant used was Refrigerant 12 (R-12), a vannamei shrimp product. The cycle cooling load is 47.33 kW. Cold storage designed for the process of preserving shrimp with a capacity of 13 tons, Cooling temperature in cold storage is 10° C, Superheated temperature is 5° C, Sub cooled temperature is 5° C, Refrigerant temperature in the condenser is 35° C, Refrigerant temperature in the evaporator is 5° C, the pressure in the condenser is 0.8 MPa, the pressure in the evaporator is 0.4 MPa so that a coefficient of performance (COP) of 4.7 is obtained.
Synthesis and Characterization of Submicron Hydroxyapatite from Calcium Nitrate Tetrahydrate: Implications of pH Variations in the Precipitation Process Prameswari, Devi Diyah Ayu; Anggaraeni, Chaterine Oktavia; Edahwati, Luluk; Redjeki, Sri; Santi, Shinta Soraya
Jurnal Kimia Sains dan Aplikasi Vol 28, No 7 (2025): Volume 28 Issue 7 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.7.368-373

Abstract

Hydroxyapatite (HAp) is the primary mineral component of bone and tooth tissue. Submicron-sized HAp offers enhanced osteoconductive properties, enabling it to serve effectively as a scaffold to support osteoblast activity and new bone formation. In this study, HAp was synthesized from calcium nitrate tetrahydrate using the precipitation method. The main variable investigated was the pH, adjusted by the addition of ammonium hydroxide, which influenced the yield and Ca/P ratio of the resulting HAp. The synthesized HAp was characterized using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Atomic Absorption Spectroscopy (AAS Flame), UV-Vis spectrophotometry, and X-Ray Diffraction (XRD). The optimal HAp product was obtained at pH 11 and sintered at 800 °C, yielding a Ca content of 2.56% and a P content of 4.28%, resulting in a Ca/P ratio of 1.6719; consistent with the theoretical stoichiometric value of 1.67. This was supported by XRD analysis, which showed the highest intensity peak at 2θ = 31.74°, confirming the presence of hydroxyapatite. SEM analysis revealed a particle size of 460.8 nm and a porosity of 20.15%. These findings demonstrate that hydroxyapatite can be successfully synthesized via precipitation using calcium nitrate tetrahydrate under optimal conditions of pH > 11.
Study of The Mass Transfer Coefficient from Lignin Removal Process of Coffee Husk in a Baffled Reactor Nandini, Atika; Edahwati, Luluk
Innovative: Journal Of Social Science Research Vol. 4 No. 6 (2024): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v4i6.17104

Abstract

The organosolv method of delignification uses organic solvents such as ethanol to remove lignin from biomass. The aims of this research to determine mass transfer coefficient in the delignification process of coffee husk. The White rot fungus, Phanerochaete chrysosporium, was used to degrade lignin component in incubation process of coffee husk biomass, then acid hydrolysis process was carried out by using citric acid to degrade the polysaccharides content (cellulose and hemicellulose). The lignin removal process was conducted at temperature of 50°C, an ethanol concentration of 25%, stirring rates (500-700 rpm) and stirring time (30-180 minutes). The effects of mass transfer were evaluated for variation of stirring rates and stirring time. The results of mass transfer coefficient ranged on 0.0550/s and 0.6710/s. This result indicates an increase in stirring time and stirring rate leads to a higher mass transfer coefficient.
PERENCANAAN COLD STORAGE SEBAGAI PENYIMPANAN UDANG VANAME DAERAH DI KABUPATEN POHUWATO PROVINSI GORONTALO Pido, Rifaldo; Gobel, Fendy Faizal; Edahwati, Luluk
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 11 No. 1 (2023): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v11i1.352

Abstract

This study describes the calculation of cold storage analysis for planning the preservation of vannamei shrimp in Pohuwato Regency. The purpose of this paper is to calculate the cooling load on frozen fish cold storage, calculate the performance of the vapor compression cycle including mass flow rate, compressor power, and COP. This study uses a theoretical design method. Cold storage design for product storage. The design data was obtained from field observations. The calculation results showed that the Refrigerant used was Refrigerant 12 (R-12), a vannamei shrimp product. The cycle cooling load is 47.33 kW. Cold storage designed for the process of preserving shrimp with a capacity of 13 tons, Cooling temperature in cold storage is 10° C, Superheated temperature is 5° C, Sub cooled temperature is 5° C, Refrigerant temperature in the condenser is 35° C, Refrigerant temperature in the evaporator is 5° C, the pressure in the condenser is 0.8 MPa, the pressure in the evaporator is 0.4 MPa so that a coefficient of performance (COP) of 4.7 is obtained.
Effect of In Situ Gelatin Addition on Synthesis and Characteristics of Limestone Based Hydroxyapatite using Sol-Gel Method Edahwati, Luluk; Rahmah, Nazila Alfi; Wahyudi, Mohammad Rafli Alif
TEKNIK Vol 46, No 3 (2025): Juli 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i3.67466

Abstract

Hydroxyapatite (HAp) is a major component of bone and tooth tissues used to repair and rebuild malfunctioning bone. Hydroxyapatite synthesis widely utilizes materials that have a high calcium content. In this study, limestone was used as an economical calcium precursor. Gelatin was added in situ during the sol-gel process to improve biomechanical properties such as porosity and reduce the particle size. Therefore, this study aims to investigate the effect of in situ gelatin addition at different concentrations (30%, 40% and 50%) and pH variations (10, 11 and 12) during the sol–gel synthesis of limestone-based hydroxyapatite, focusing on its influence on porosity, particle size, and Ca/P ratio to evaluate its potential for biomedical applications. Highest yield was obtained when the hydroxyapatite was prepared using 30% gelatin concentration with pH 12. Fourier Transform Infrared (FTIR) spectroscopy confirmed the presence of the characteristic functional groups of hydroxyapatites, namely phosphate (PO₄³⁻), carbonate (CO₃²⁻), and hydroxyl (OH⁻). SEM-EDX analysis revealed granular and irregular crystal morphology with particle size below 600 nm, while image analysis of SEM-EDX micrographs using ImageJ estimated the highest apparent porosity of 60.73% at pH 10. These results indicate that the in situ addition of gelatin during the sol-gel process successfully produced hydroxyapatite with biomechanical properties suitable for implant applications, especially in teeth, with optimal porosity and adequate particle size to support cell growth.
Application Of The Sol-Gel Hydroxhapatite Synthesis Method From Green Clam Shell Edahwati, Luluk; Sutiyono, Sutiyono; Ikaputri, Aninda; Nur Fuadzi, Moh
International Journal of Science, Technology & Management Vol. 4 No. 4 (2023): July 2023
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v4i4.864

Abstract

Hydroxyapatite is the main mineral that makes up bones and teeth so that it has a level of similarity with the mineral parts of bones and can be used as an alternative bone substitute material. As an alternative material for bone substitution, hydroxyapatite has a fairly high economic value and is still dominated by imports from foreign countries. In an effort to reduce the level of imports of hydroxyapatite, research was carried out on green mussel shells as a source of calcium for the synthesis of hydroxyapatite. The synthesis of hydroxyapatite was carried out using the sol-gel method with raw materials for calcium precursors obtained from green mussel shells and varied concentrations of phosphoric acid (0.1 M, 0.5 M, 1 M; 1.5 M; and 2 M). Based on the analysis of the hydroxyapatite product produced using Atomic Absorption Spectrophotometry analysis, it was found that the ratio of Calcium-Phosphate (Ca/P) for H3PO4 concentrations was 0.1 M, 0.5 M, 1 M; 1.5M; and 2 M respectively by 1.73; 1.70; 1.67; 1.63; and 1.61. In addition, based on the results of the Fourier Transform Infra Red analysis, a random sample also found a Ca-O group; PO43; and OH- which is the main group of Hydroxyapatite and from SEM analysis the crystal morphology is known to be spherical, uneven and agglomerated so that in this study the synthesis of Hydroxyapatite using the sol-gel method was successfully carried out..
Co-Authors Achmad Fanani Adiman, Thareq Muhammad Fathan Agung F. Kulianto Andini, Atika Anggaraeni, Chaterine Oktavia Anggriawan, Rizqi Rendri Anisah D. Ramadhani Aprilianty, Syasmitha Lucky Ardiza, R.Muhammad Rizky Atika Andini Dewangga, Bayu S. Dian Nuraini DWI LESTARI, WAHYU Dyah Siswanti Dyah Suci Perwitasari Edahwati, Wahyu Dwi Lestari Faizin, Ahmad Khairul Falah, Ra Niyatul Fauziah Hilda Alvira Fauziah, Maria Rizky Feriyanto, Ahmad Gobel, Fendy Faizal Harya, Gyska Indah Herdiana Septiani Herdiana Septiani Ika Nawang Puspitawati Ikaputri, Aninda Indah Nur Fauziyah Issafira, Radissa Dzaky Kalimatus S Kartika Pratiwi Kurniawan, Ferdi L.Urip Widodo, Yohandrik Novel Karaman Lusy Larasati A Maria Vindri Vincensia Saru miftakhurrohman, moch Mr. Sutiyono Munandar, Siswanto Mutiya Zevi Nana Dyah Siswati, Anwar Zain and Mohammad Nandini, Atika Ndaru Adyono Ndaru Adyono, Ndaru Nikmatuz Zahra Nikmatuz Zahra Nur Fuadzi, Moh Prameswari, Devi Diyah Ayu Prayoga, Ferdiyan Tri Puspa Sari, Tria Rahmah, Nazila Alfi Rifaldo Pido Rizaldi, Ryan Rizqi Rendri Anggriawan Rizqi Rendri Anggriawan S, Sutiyono Santi, Shinta Soraya Sari, Tria Puspa Saru, Maria Vindri Vincensia Setyanugraha, Moch. Alief Soemargono Soemargono Sri Muljani Sri Redjeki SRIE MULJANI Suprihatin Susilowati MT Susilowati Susilowati Sutiyono Sutiyono . sutiyono sutiyono Titi Susilowati Tria Puspa Sari Tutuk Harsini Wahyu Dwi Lestari Wahyudi, Mohammad Rafli Alif Wiliandi Saputro Zevi, Mutiya