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All Journal Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Jurnal Sumberdaya Alam dan Lingkungan The Journal of Pure and Applied Chemistry Research Jurnal Fisika Unand JURNAL INTEGRASI PROSES Jurnal Penelitian Pertanian Terapan Briliant: Jurnal Riset dan Konseptual Jurnal Pendidikan Kimia (JPKim) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan G-Tech : Jurnal Teknologi Terapan Nusantara Science and Technology Proceedings
Dyah Suci Perwitasari
Program Studi Teknik Kimia, Fakultas Teknik, Universitas Pembangunan Nasional ”Veteran” Jawa Timur
Agriculture, Biological Sciences & Forestry 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 Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Journal : nusantara science and technology proceedings

 1 
Biosorption of Total Chrome Metals on Leather Tannery Liquid Waste Using Tofu Dregs Pangestu, Muhammad Aji; Pracesa, Yahya Ardian Yuma; Perwitasari, Dyah Suci
Nusantara Science and Technology Proceedings 1st International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2020.0531

Abstract

Chrome metal was the main element in tannery liquid waste. Chrome was included in B3 waste and has the potential to destructed or contaminated surroundings. The use of natural material as an adsorbent medium for b3 heavy metal currently was being studied. Tofu dregs were an alternative that can be used as biosorbent. This study's aim was to adsorbed total chrome metal in tannery liquid waste. The operating conditions took place at a pH of 7 and a stirring speed of 200 rpm. The analysis using Atomic Absorption Spectrometer (AAS) showed that the total chromium adsorption efficiency occurs in the addition of 6 grams of biosorbent with a contact time of 160 minutes. The adsorption percentage was 98% and the residual level total chromium metal in the tannery liquid waste was 0,33 mg/L after adsorption. These results have fulfilled the quality standard of the leather tannery wastewater that was allowed to be released into the environment with maximum total chrome metal levels of 0,5 mg/L. The total chromium metal biosorption in this study followed the Langmuir isotherm and took place as chemisorption.
Reduction of Chrom Ion (Cr) With Ion Exchange Resin in Liquid Waste of Leather Tanning Saputri, Resy Mareta Dwi; Aurellia, Pingky Marcella; Perwitasari, Dyah Suci
Nusantara Science and Technology Proceedings 1st International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2020.0532

Abstract

The leather tanning industry was classified as industrial in large quantities and dangerous. One of the wastes that produced was waste liquid containing chromium ions. The liquid waste that was released was very cloudy, colored, and has rotten management that caused serious problems to water bodies, communities and the environment. The waste without special handling was discharged into the environment. So that with the ion exchange method, it could reduce environmental pollution caused by industrial leather tanning waste. This study aimed to determine the effect of resin in reducing the chromium ion content in the liquid waste of the leather tanning industry using the ion exchange method. Namely, by consolidating waste and resin with various predetermined variables. The positively charged chromium ion will exchange with the H+ ion found in dowex resin. So that the chromium levels in the tannery liquid waste could be reduced. The results were obtained by the contact time and weight of the resin used. The highest reduction in chromium ion content was at contact time for 80 minutes with a resin weight of 150 grams of 98.75%.
Langmuir and Freundlich Isotherm Approximation on Adsorption Mechanism of Chrome Waste by Using Tofu Dregs Dyah Suci Perwitasari; Yahya Ardian Yuma Pracesa; Muhammad Aji Pangestu; Pardi Sampe Tola
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

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

Abstract

The requirement to discover low-cost and high-efficiency adsorbents material for the heavy metal removal of industrial effluents has been growing attention for many environmental researchers. Natural materials are being studied intensively as adsorbent materials because of their abundant source, low-cost processing, and relatively high adsorption efficiency. This study investigates the tofu dregs as adsorbents material to remove chrome metal, the main element in tannery liquid waste. Analysis of experimental data from adsorption processes is crucial to understand and predict removal mechanisms, efficiency, or required adsorbent mass under given initial conditions. Langmuir and Freundlich's adsorption isotherms were applied to the experimental data to determine their intrinsic parameters. The intrinsic parameters of Langmuir and Freundlich adsorption isotherms can subsequently be used to analyze the adsorption mechanism. This was achieved by combining the isotherms equation with mass conservation of solute before and after adsorption
Inhibition of Struvite Crystal Growth with The Addition of Carboxylic Acid Using Batch Operation Dyah Suci Perwitasari; Sintha Soraya Santi; Muhammad Aji Pangestu; Yahya A.
Nusantara Science and Technology Proceedings International Seminar of Research Month 2021
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2022.2457

Abstract

Tartaric acid and maleic acid are carboxylic acids that effectively inhibit the growth of struvite crystals and weak organic acids that are friendly environments. The purpose of this study was to determine the effectiveness of inhibition of struvite crystal growth from the effect of adding carboxylic acid (tartaric acid and maleic acid) using batch operation which can be used as a slow-release fertilizer. Struvite is an effective phosphate fertilizer as an alternative source of rock phosphate to maintain agricultural production systems. From the results of the study, tartaric acid was found to be 10,483 mg at a temperature of 40oC with a concentration of 20 ppm and stirrer rotation of 300 rpm which was a better optimum condition to be applied in the struvite fertilizer industry when compared to maleic acid. Characterization of struvite crystals using XRPD Rietveld and SEM-EDX methods.
Utilization of Corn Husk Waste as Raw Material for Making Biobutanol Dyah Suci Perwitasari; Graciella Yerrica Nathania; Abid Alghifari
Nusantara Science and Technology Proceedings 4th International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2023.3639

Abstract

Corn husk waste is a biomass raw material that can be processed into biobutanol. Making biobutanol to reduce the use of fossil fuels. This research used anaerobic microorganisms, namely Clostridium acetobutylicum, which can survive at low pH between 4,5 and 5 at a temperature of 30°C. Corn husk contains 36.218% cellulose; 25.212% hemicellulose; 15.807% lignin. The cellulose raw material content can be used for fermentation because it meets the fermentation content requirements of 36 – 50%. The research methods used include raw material preparation, delignification, dilute acid hydrolysis, and anaerobic fermentation. The research results showed that optimum condition was obtained at the 72-hour fermentation time with the addition of a 5% Clostridium acetobutylicum bacteria volume of 7.0160%. At the 72 hour fermentation time, it showed that the bacteria grew optimally and entered the stationary phase. Biobutanol levels after 72-hour decreased due to reduced nutrients in the fermentation media. The increase in the volume of bacteria affects the final results, the volume of bacteria is added, the final results biobutanol levels will decrease because the nutrients added have been used up. The results of the analysis of butanol levels were determined using Gas Chromatography, the standard for butanol formation obtained at a retention time of 3.598%. The low butanol content (7,0160%) does not require industry standards (96.5 – 99%) to be used as environmentally friendly fuel, due to obstacles in maintaining anaerobic fermentation conditions and not carrying out fermentation filtrate sterilization, which has an impact on the final result of biobutanol content.ly and requires improvement, particularly in the quest for zero defects.
Co-Authors Abdul Aziz Abid Alghifari Adinata Shafi Wahyudi Suwarno Aisah Akbar, Dimas Ilham Anwar, Rangga Febry AR Yelvia Sunarti Aurellia, Pingky Marcella Bambang Wahyudi Damayanti, Nabilla Dian Pratiwi Tejo Kusumo Dimas Arnanda Dira Ernawati Dyah Siswanti Fadhila, Dheytra Akhnaz Namira Fadly, Teuku Andi Graciella Yerrica Nathania Ika Nawang Puspitawati Jovita, Stella Ketut Sumada Kindriari Nurma Wahyusi Kindriari Nurma Wahyusi Kusuma Wardhani Mas’udah Luluk Edahwati Mas’udah, Kusuma Wardhani Maulida, Nabilah Muhammad Aji Pangestu Muhammad Aji Pangestu Muhammad Nauli Rizqi Akbar Nabilla Nabilla Nailul Hasan Nana Dyah Siswati, Anwar Zain and Mohammad Nufus, Wahyu Qur'ani Nufus, Wahyu Qurani Nugroho, Sutra Amelia Nur Aini Fauziyah Nuraini, Adila Silmi Nurfauzi, Muchamad Lutfi Pamoedji, Yemima Natalia Eka Kristiyanti Pangestu, Muhammad Aji Pardi Sampe Tola Pardi Sampe Tola Pracesa, Yahya Ardian Yuma Retno Dewati Reva Edra Nugraha Rizquallah, Izal Daffa Safira, Lutfia Rima Salsabil Husodo, Amani Sani Saputri, Resy Mareta Dwi Saputro, Erwan Adi Setiani, Astri Sintha Soraya Santi Sirait, Esterly Septiana SRIE MULJANI Suprianti, Lilik Susianto, Mordekhai Yosep Susilowati Teuku Andi Fadly Utami, Diana Inas Widyaningrum, Nilam Putri Yahya A. Yahya Ardian Yuma Pracesa