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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 AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment)
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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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%.
PEMBERDAYAAN MASYARAKAT KELURAHAN GEBANG PUTIH-SURABAYA DALAM MENGELOLA SAMPAH RUAMAH TANGGA MENGGUNAKAN KOMPOSTER SEDERHANA Perwitasari, Dyah Suci; Fauziyah, Nur Aini; Mas’udah, Kusuma Wardhani
SELAPARANG Jurnal Pengabdian Masyarakat Berkemajuan Vol 4, No 3 (2021): Agustus
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v4i3.5282

Abstract

ABSTRAKPenyuluhan tentang pembuatan kompos organik rumah tangga telah dilakukan di Kelurahan Gebang Putih, Surabaya. Minimnya lahan dan lokasi perumahan yang padat menjadi tantangan terbesar dalam pengomposan. Oleh karena itu, pembuatan kompos sederhana dari sampah organik rumah tangga turut dikembangkan pada penyuluhan ini. Metode yang dikembangkan pada pengabdian ini adalah dengan penyuluhan langsung bersama warga setempat. Tahapan penyuluhan adalah pemilahan sampah, pembuatan kompos organik sederhana, dan diakhiri dengan praktek dalam membuat kompos organik sederhana. Sedangkan  dalam pembuatan kompos dalam skala rumah tangga sangatlah mudah. Ember bekas sebagai media komposter cukup dilubangi bagian bawahnya. Sampah coklat (daun kering, tanah, dst) ditumpuk dengan sampah hijau (sayuran, kulit buat, dst) yang disusun dengan bergantian hingga memenuhi ember. Kemudian, air leri ditambahkan di atas tumpukan sampah tersebut sebagai cairan bioaktivator. Setelah diberikan penyuluhan dan pelatihan, warga mengakui bahwa wawasan dalam mengolah sampah di tengah keterbatasan lahan menjadi lebih terbuka, mudah dan tidak berbau. Keberhasilan pelatihan ini juga didukung oleh kuisioner akhir yang mana rata-rata kemampuan peserta tentang pembuatan kompos meningkat sebesar 83% dari sebelumnya. Kata Kunci: komposter; sampah organik; air leri. ABSTRACTThe training on making household organic compost has been accomplished in Gebang Putih, Surabaya. The lack of land and dense housing locations were the biggest challenges in composting. Therefore, making simple compost from household organic waste was also developed in this counseling. The method developed in this service was direct counseling with local residents. The counseling stages were waste sorting, making simple organic compost, and ending with practice in making simple organic compost. Meanwhile, making compost on a household scale was easy. The used bucket as a composter media was enough to make a hole at the bottom. Brown waste (dried leaves, soil, etc.) was stacked with green waste (vegetables, leather, etc.) which were arranged alternately until they fill the bucket. Then, leri water was added on top of the pile of waste as a bioactivator liquid. After being given counseling and training, the residents acknowledged that the insight in processing waste in the midst of limited land became more open, easy and odorless. The success of this training was also supported by the final questionnaire where the average ability of participants in composting increased by 83% from the previous one. Keywords: composter; organic trash; lei water.
Reduction of Lignin from Coffee Husk using Organosolve Method Luluk Edahwati; Dyah Suci Perwitasari; Dyah Siswanti
Eksergi Vol 11, No 2
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v11i2.364

Abstract

Coffeehas a significant role for the plantation sector in Indonesia. During processing of coffee, the husk is alse gonerated. Coffeefruit husk waste is usally used as an animal feed ingredient or as organic fertilizer. Coffee shell husk contains lignin and cellulose in 8.67% at 41.26%, respectively.This cellulose is rather high, that could be potential for bioethanol production. However the quality of bioethanol will increase if the lignin content in coffee leather eliminated or reduced. Organosolve method is one of the lignin separation process using organic chemicals that are environmentally friendly eg ethanol and methanol. In this lignin removal process variable is run 2 hours of cooking time, the concentration of ethanol (v / v) 10%, 20%, 30%, 40%, and 50%, while the addition of citric acid 1:12, 1:16 and 1: 18. The best result of the removal of lignin from cocoahusk occurred in 40%(v/v)ethanol  with the addition of citric acid and 1:16 for 2 hours cooking time obtained lignin content (in deposition) of 0.31% and 6.14 % lignin in the filtrate.
PENDAYAGUNAAN DAN METORSHIP KADER PKK KELURAHAN GEBANG PUTIH SURABAYA DALAM MENGOLAH LIMBAH ORGANIK RUMAH TANGGA SEBAGAI KOMPOS IRIT LAHAN DENGAN EM4 SEBAGAI BIOAKTIVATOR Nur Aini Fauziyah; Dyah Suci Perwitasari; Kusuma Wardhani Mas’udah; Primasari Cahya Wardhani; Nailul Hasan; Pardi Sampe Tola; AR Yelvia Sunarti; Kindriari Nurma Wahyusi
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 6, No 1 (2022): Maret
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v6i1.7756

Abstract

ABSTRAKKegiatan pendayagunaan dan mentoring pengolahan limbah organik rumah tangga pada jurnal ini merupakan bentuk tindak lanjut dari kegiatan penyuluhan yang telah dilakukan sebelumnya (Perwitasari dkk., 2021). Dengan menggunakan metode ringkas yang irit lahan, masyarakat Kelurahan Gebang Putih telah mampu mengolah limbah organik sederhana menjadi kompos siap guna dengan menggunakan EM4 sebagai bioaktivator. Metode yang dikembangkan pada kegiatan pengabdian ini adalah melalui metode mentoring secara online dengan kader PKK yang ada di Kelurahan Gebang Putih, Surabaya.  Meski mentoring tidak bisa dilakukan secara langsung, kader PKK bersama perwakilan warga telah berhasil mendayagunakan sampah organik rumah tangga sebagai kompos organik. Kegiatan ini terbukti mampu meningkatkan nilai guna limbah organik menjadi semakin bernilai ekonomis. Warga menjadi lebih hemat karena tak perlu lagi membeli kompos jika ingin bercocok tanam. Harapannya, kelak kompos akan menjadi salah satu peluang ekonomi yang menjanjikan bagi warga Kelurahan Gebang Putih. Kata Kunci: pendayagunaan; mentoring; EM4.ABSTRACTThe utilization and mentoring activities for simple organic waste processing in this journal are a form of follow-up to the counseling activities that have been carried out previously (Perwitasari et al., 2021). By using a compact method that saves land, the people of Gebang Putih Village have been able to process simple organic waste into ready-to-use compost using EM4 as a bioactivator. The method developed in this service activity is through an online mentoring method with PKK cadres in Gebang Putih Village, Surabaya. Although mentoring cannot be done directly, PKK cadres together with community representatives have succeeded in utilizing household organic waste as organic compost. This activity is proven to be able to increase the use value of organic waste to become more economically valuable. Residents become more efficient because they no longer need to buy compost if they want to grow crops. It is hoped that in the future compost will become a promising economic opportunity for residents of Gebang Putih. Keywords: development; mentoring; EM4.
PEMBERDAYAAN MASYARAKAT KELURAHAN GEBANG PUTIH-SURABAYA DALAM MENGELOLA SAMPAH RUAMAH TANGGA MENGGUNAKAN KOMPOSTER SEDERHANA Dyah Suci Perwitasari; Nur Aini Fauziyah; Kusuma Wardhani Mas’udah
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 4, No 3 (2021): Agustus
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (262.18 KB) | DOI: 10.31764/jpmb.v4i3.4807

Abstract

ABSTRAKPenyuluhan tentang pembuatan kompos organik rumah tangga telah dilakukan di Kelurahan Gebang Putih, Surabaya. Minimnya lahan dan lokasi perumahan yang padat menjadi tantangan terbesar dalam pengomposan. Oleh karena itu, pembuatan kompos sederhana dari sampah organik rumah tangga turut dikembangkan pada penyuluhan ini. Metode yang dikembangkan pada pengabdian ini adalah dengan penyuluhan langsung bersama warga setempat. Tahapan penyuluhan adalah pemilahan sampah, pembuatan kompos organik sederhana, dan diakhiri dengan praktek dalam membuat kompos organik sederhana. Sedangkan  dalam pembuatan kompos dalam skala rumah tangga sangatlah mudah. Ember bekas sebagai media komposter cukup dilubangi bagian bawahnya. Sampah coklat (daun kering, tanah, dst) ditumpuk dengan sampah hijau (sayuran, kulit buat, dst) yang disusun dengan bergantian hingga memenuhi ember. Kemudian, air leri ditambahkan di atas tumpukan sampah tersebut sebagai cairan bioaktivator. Setelah diberikan penyuluhan dan pelatihan, warga mengakui bahwa wawasan dalam mengolah sampah di tengah keterbatasan lahan menjadi lebih terbuka, mudah dan tidak berbau. Keberhasilan pelatihan ini juga didukung oleh kuisioner akhir yang mana rata-rata kemampuan peserta tentang pembuatan kompos meningkat sebesar 83% dari sebelumnya. Kata Kunci: komposter; sampah organik; air leri. ABSTRACTThe training on making household organic compost has been accomplished in Gebang Putih, Surabaya. The lack of land and dense housing locations were the biggest challenges in composting. Therefore, making simple compost from household organic waste was also developed in this counseling. The method developed in this service was direct counseling with local residents. The counseling stages were waste sorting, making simple organic compost, and ending with practice in making simple organic compost. Meanwhile, making compost on a household scale was easy. The used bucket as a composter media was enough to make a hole at the bottom. Brown waste (dried leaves, soil, etc.) was stacked with green waste (vegetables, leather, etc.) which were arranged alternately until they fill the bucket. Then, leri water was added on top of the pile of waste as a bioactivator liquid. After being given counseling and training, the residents acknowledged that the insight in processing waste in the midst of limited land became more open, easy and odorless. The success of this training was also supported by the final questionnaire where the average ability of participants in composting increased by 83% from the previous one. Keywords: composter; organic trash; lei water.
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.
Pengaruh Kristalinitas terhadap Stabilitas Termal Komposit Termoplastis Berpengisi Silika Xerogel Nur Aini Fauziyah; Dyah Suci Perwitasari; Primasari Cahya Wardhani; Teuku Andi Fadly
Jurnal Fisika Unand Vol 11 No 3 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (350.869 KB) | DOI: 10.25077/jfu.11.3.327-333.2022

Abstract

Penetian ini bertujuan untuk mengetahui pengaruh kristalinitas terhadap stabilitas termal komposit termoplastis dengan pengisis silika xerogel. Polimer yang digunakan adalah polietilena glikol (PEG 4000) yang merupakan polimer termoplastis. Silika xerogel diekstraksi melalui proses alkali fusion. Silika xerogel yang didapatkan menunjukkan fasa amorf melalui X-Ray Diffraction (XRD). Silika xerogel ditambahakan ke dalam PEG 4000 dengan komposisi yang bervariasi, yaitu, 0, 5, 10, dan 20%. Penambahan silika xerogel menurunkan tingkat kristalinitas komposit karena PEG murni merupakan material semikristalin. Melalui analisis termal menggunakan Thermogravimetric Analysis (TGA), pengaruh kristalinitas komposit tampak jelas pada daerah sebelum polimer mengalami transisi leleh. Namun, pada daerah dekomposisi (T>400°C), pengaruh kristalinitas pada komposit tidak ada lagi. Hasil ini sangat menarik dikarenakan massa dekomposisi akhir menunjukkan nilai yang sama dengan komposisi silika xerogel yang ditambahkan, misalnya pada penambahan 20%, massa yang tersisa setelah dekomposisi adalah 20,77982 %. Oleh karenanya, analisis kristalinitas sangat mendukung hasil analisis termal dengan TGA pada komposit.
Synthesis of Struvite Crystal (MgNH4PO4.6H2O) from Laundry Waste to Consider its Potential as a Plant Fertilizer: Stirring and Processing Temperature Effect Dyah Suci Perwitasari; Nur Aini Fauziyah; Pardi Sampe Tola
The Journal of Pure and Applied Chemistry Research Vol 11, No 3 (2022): Edition September-December 2022
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2022.011.03.697

Abstract

This paper aimed to process phosphate from laundry waste to be struvite crystal by precipitation and crystallization methods. In general, phosphates are difficult to remove by conventional treatment technologies. Therefore, precipitation and crystallization methods can be an alternative choice for phosphate recovery. Precipitation and crystallization methods can serve to remove dissolved phosphate content in wastewater, as well as convert it into a solid form that can be reused as industrial raw materials. The research variables used were stirring temperature (25, 30, and 35 °C) and stirring speed (100, 125, 150, and 200 rpm). By using X-ray Fluorescence (XRF) and Scanning Electron Microscope (SEM-EDX), the analysis showed that the highest percentage of phosphate removal was at a stirring speed of 100 rpm at 30°C, which was 47.5%. X-ray Diffraction (XRD) was also carried out on several samples and it was confirmed that the dominant crystal phase formed was a struvite (MgNH4PO4.6H2O) for all samples, and secondary phase Magnesium Phosphate Hydrate (Mg3(PO4)2*8H2O was found in a stirring speed of 100 rpm at 30°C. The morphology of the struvite crystals formed resembles irregular flakes by using SEM.
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 Panjaitan, Renova 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 Sari, Vini Fita Satrio, Wahyu Sugeng Bagus Setiani, Astri Sintha Soraya Santi Sirait, Esterly Septiana Sri Redjeki SRIE MULJANI Suprianti, Lilik Susianto, Mordekhai Yosep Susilowati Susilowati Teuku Andi Fadly Trianna, Nurul Widji Utami, Diana Inas Widyaningrum, Nilam Putri Yahya A. Yahya Ardian Yuma Pracesa