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All Journal Jurnal Teknik ITS Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Journal of Applied Data Sciences Jurnal Pengabdian Kepada Masyarakat Patikala Aptekmas : Jurnal Pengabdian Kepada Masyarakat Formosa Journal of Applied Sciences (FJAS) Dharma: Jurnal Pengabdian Masyarakat ABDIKOM Jurnal Teknik Kimia
Nyamiati, Retno Dwi
Program Studi Teknik Kimia, Jurusan Teknik Kimia, Fakultas Teknik Industri, Universitas Pembangunan Nasional Veteran Yogyakarta, Jl. SWK 104 (Lingkar Utara) Condong Catur, Yogyakarta 55283, Indonesia
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A Critical Review of Carbonization Hydrothermal and Pyrolysis for Adsorbent Production and the Application in Industrial Dye Removal Nyamiati, Retno Dwi; Putri Restu Dewati; Muhammad Redo Ramadhan; Ika Wahyuning Widiarti; A Hidayat Nurwahid; Nabila Aulia Balqis
Eksergi Vol 22 No 2 (2025)
Publisher : Prodi Teknik Kimia UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v22i2.14742

Abstract

Biochar is increasingly recognised as a low-cost and efficient adsorbent for removing organic dyes from wastewater. This review outlines recent developments in biochar production, particularly comparing biochars produced via pyrolysis and hydrothermal carbonisation (HTC). While pyrolysis biochar often exhibits a higher surface area, HTC biochar offers improved oxygen-containing functional groups, contributing to enhanced dye affinity. Studies indicate that biochar can achieve adsorption capacities ranging from 2 to 1353.09 mg/g for dyes such as methylene blue and crystal violet, comparable to or exceeding that of pyrolysis-derived biochars. The review also highlights characterisation techniques such as XRD, FTIR spectroscopy, and SEM to evaluate surface functionality, porosity, and morphology, which directly influence adsorption performance. Practical implications include the suitability of HTC biochar for low-energy, decentralised wastewater treatment systems, particularly in textile and dyeing industries. By connecting production parameters with biochar properties, this review provides insights into optimizing biochar as an adsorbent, particularly for the treatment of dye-contaminated wastewater.
Inovasi pewarnaan ramah lingkungan dan integrasi multiplatform berbasis digital untuk penguatan UMKM kerajinan alam Pradana, Musthofa Galih; Pinastawa, I Wayan Rangga; Nyamiati, Retno Dwi; Wiryanto, Fadhli Suko; Budi, Ryan Setya; Arifuddin, Nurul Afifah; Adrezo, Muhammad; Niqotaini, Zatin
Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Vol. 6 No. 4 (2025)
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jp2m.v6i4.24154

Abstract

Kawasan Industri Sentolo menjadi lokasi strategis bagi UMKM Jangkang Indah Craft, yang memproduksi kerajinan serat agel,  sumber daya alam yang ada di Kulon Progo. Pada tahun 2025, usaha ini menghadapi tantangan utama berupa persiapan pemasaran internasional secara mandiri, dan penggunaan pewarna ramah lingkungan pada produksi untuk keberlanjutan ekosistem yang lebih baik dan tidak menimbulkan efek ekologis yang signifikan. Untuk menjawab hal tersebut, program Pengabdian Masyarakat dilaksanakan dengan tujuan dapat memberikan pemahaman baru dalam mengelola UMKM secara menyeluruh. Kegiatan berupa sosialisasi, pendampingan dan praktek langsung pada aspek: persiapan manajemen pemasaran dengan pelatihan digital marketing menggunakan website dan platform e‑Bay. Selain itu dilakukan praktek dan pendampingan langsung melakukan pewarnaan ramah lingkungan seperi menggunakan spirulina untuk warna hijau dan ekstrak warna kuning dengan kadar kimia yang lebih rendah lebih ramah lingkungan. Pendampingan teknis dilakukan selama 3 kal dengan hasil evaluasi melalui kuesioner menunjukkan rata‑rata kepuasan peserta sebesar 4,27 (skala 1‑5), mengindikasikan penilaian berada pada skala baik. Hal ini juga selaras dengan peningkatan yang sudah terjadi dalam pendampingan sebelumnya, dimana pembuatan website dapat membangun branding awal yang baik, terbukti beberapa kemitraan sudah terjalin berkat kemudahan akses informasi pada UMKM.
SOSIALISASI TEKNOLOGI TEPAT GUNA DALAM PRODUKSI GULA AREN DI DESA KALIABU, MAGELANG Kusuma, Heri Septya; Bambang Sugiarto; Didi Saidi; Retno Dwi Nyamiati
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 7 No 1 (2024): APTEKMAS Volume 7 Nomor 1 2024
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36257/apts.v7i1.8585

Abstract

Palm sugar has wide scope as an alternative sweetener in the Indonesian market. Palm sugar is a natural alternative to cane sugar which is less healthy and also more beneficial for farmers. The taste, sensory profile, and nutritional content of palm sugar vary based on the species, growing region, and climatic conditions. Currently, the traditional processing of palm sap in Kaliabu village results in lower yields and higher costs. There is enormous potential in the field of developing processing techniques (traditional processing, spray drying, membrane technology, and vacuum drying) to optimize palm sugar production in Kaliabu village. Spray drying is a non-conventional method that has the potential to be implemented in palm sugar production in Kaliabu village. This is because spray drying is quite good in terms of increasing antioxidant and phenolic content as well as storage capacity.
Adsorption Dye in Batik Wastewater using Biomass Adsorbent : a State of the Art Review Retno Dwi Nyamiati; Vera Listiawati; Galang Ariyuda
Formosa Journal of Applied Sciences Vol. 2 No. 12 (2023): December 2023
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjas.v2i12.7059

Abstract

In this article, we study several research about optimizing the adsorption of harmful compounds contained in batik dye liquid waste using activated carbon. The employment of naphthalene as a chromogenic agent in the batik industry introduces a significant quandary by contributing to water pollution through effluent discharge. Noteworthy efforts have been made by certain industries, employing activated carbon to mitigate the presence of Pb and Cr attributable to naphthalene. The principal objective of this exposition is to consolidate insights into the sequestration of perilous dyes within batik industry effluents, leveraging various forms of natural activated carbon. The kinetics of the adsorption process will be quantified utilizing the appropriate kinetic order formula, while equilibrium data will be scrutinized through reaction isotherms employing diverse models.
A State of the Art Review For Removing Heavy Metals Resulting from Industrial Waste Nyamiati, Retno Dwi; Setyaningtyas, Wiji Asih; Arstyanto, Dimas
Formosa Journal of Applied Sciences Vol. 3 No. 6 (2024): June 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjas.v3i6.9604

Abstract

The contamination of heavy metals has become a serious concern for both the government and researchers due to industrial waste. Heavy metals possess toxic properties that can harm the human body if exposed over an extended period. It cannot be denied that toxic heavy metals come in various types, such as Ag (argentum), Cd (cadmium), Cr (chromium), Cu (cuprum), Ni (nickel), and others. In its development, various methods have been implemented to eliminate heavy metal waste, encompassing both conventional and modern approaches. Researchers are actively seeking the most efficient and effective method to address the issue of heavy metal removal. This review focuses on different methods for handling heavy metal waste, measuring the percentage of heavy metal loss to determine which method is the most effective and efficient in heavy metal removal.
Effect of Cycling and Washing in Fouling Level from Theaflavin Filtration on Ultrafiltration Membrane Nyamiati, Retno Dwi; Yulianto, Mohamad Endy; Nanda, Dodi Eko; Diwiyanto, Yusron Mahendra
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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

Abstract

Ultrafiltration membranes, characterized by their molecular weight cutoff ranging from 50 to 100 kDa, are extensively employed for the filtration of macromolecules including suspended solids, carbohydrates, proteins, and various other components. However, the prolonged usage of these membranes leads to a notable decline in their performance due to fouling. Membrane fouling entails the accumulation of filtered foulant media and the formation of deposits, adversely impacting the filtration efficiency. This study focuses on evaluating the impact of repeated filtration cycles on membrane fouling and investigates the effectiveness of membrane washing in restoring membrane performance. The ultrafiltration membrane was subjected to five consecutive repetition cycles using theaflavin as the filtration media. The observed flux exhibited a substantial decline of 87%, decreasing from an initial value of 0.0574 L/m2.hr to 0.0073 L/m2.hr. To mitigate fouling and enhance membrane performance, a thorough washing process was carried out. Following the washing procedure, the flux was found to increase to 0.034 L/m2.hr, indicating a significant improvement in the membrane's performance. These findings are further supported by the morphological analysis of the membrane using Scanning Electron Microscope (SEM) photographs, which reveal the distinct differences between the membrane's morphology before and after washing.
Effect of Chitosan-TiO2 Membrane Performance for the Degradation of Batik Waste with a Photocatalytic Hybrid System Nyamiati, Retno Dwi; Timotius, Daniel; Sri Rahmawati, Septi Sri; Carissavila, Calista; Amalia, Noor
Eksergi Vol 21 No 1 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i1.10734

Abstract

The treatment of industrial wastewater has gained significant attention in recent years due to its detrimental impact on the environment and public health. This study aims to explore the effectiveness of a photocatalytic hybrid system using a Chitosan-TiO2 membrane for the degradation of batik waste. The performance of the membrane was investigated through a series of experiments, evaluating its ability to remove organic pollutants and enhance the overall treatment efficiency. The morphology, as seen through SEM images, shows a rough surface that enhances photocatalytic efficiency by providing a larger surface area for reactions. The uniform distribution of TiO2 particles within the chitosan matrix is crucial for stable and efficient pollutant degradation during photocatalysis. Furthermore, Chitosan-TiO2 membranes offer a promising solution for batik wastewater treatment. They combine the benefits of chitosan's permeability and organic substance capture with TiO2's photocatalytic capabilities. This integration allows for efficient, one-step hybrid photocatalytic filtration, reducing the use of harmful chemicals and producing environmentally friendlier byproducts. Finally, AAS analysis demonstrated that the addition of TiO2 improved heavy metal degradation in batik waste, with optimal performance observed up to a 89.78% rejection rate, beyond which TiO2 agglomeration occurred.
PENDAMPINGAN UMKM JANGKANG INDAH CRAFT PADA PEWARNAAN ALAMI MANAJEMEN PENGELOLAAN DAN DIGITALISASI UMKM Galih Pradana, Musthofa; Dwi Nyamiati, Retno; Ridwan, Muhamad; Rangga Pinastawa, I Wayan; Afifah Arifuddin, Nurul; Adrezo, Muhammad; Maulana, Nurhuda
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 7, No 6 (2024): MARTABE : JURNAL PENGABDIAN MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v7i6.2272-2278

Abstract

Pemerintah Daerah telah menetapkan Kawasan industri di Sentolo kurang lebih 4.796 hektar. Salah satu UMKM yang berada di Kawasan industri Sentolo adalah Jangkang Indah Craft. Jangkang Indah Craft adalah UMKM yang bergerak di bidang kerajinan yang memanfaatkan bahan dasar serat alam agel yang berada di Sentolo, Kulon Progo. Serat Agel adalah salah satu tanaman yang biasa dibudidayakan untuk bahan baku kerajinan di daerah Kulon Progo dan sudah menjadi salah satu potensi lokal yang dimiliki. UMKM Jangkang Indah Craft  memiliki beberapa kendala dan tantangan dalam menjalankan usahanya, ada 3 aspek permasalahan utama yakni pada aspek produksi, aspek manajemen, dan aspek digitalisasi. Permasalahan pada aspek produksi pada pewarnaan agel yang masih menggunakan pewarna buatan, masalah manajemen bagaimana mengembangkan usaha untuk menjadi naik kelas dan memiliki pengelolaan yang baik, permasalahan pemasaran terdapat pada kurangnya pengoptimalan dari sumber daya yang dimiliki. Hasil dari pengabdian masyarakat ini berhasil memberikan pendampingan dengan hasil pewarnaan secara alami menggunakan daun jati untuk menghasilkan warna merah, pendampingan penggunaan aplikasi pencatatan keuangan pada manajemen usaha, dan pembuatan website dan operasinya untuk proses marketing yang lebih optimal. Hasil kuisioner menunjukan nilai kepuasan di angka 4,29.  
The Use of Moringa Seeds and Alum to Improve the Quality of Well Water into Drinking Water Bambang Sugiarto; Sephia Lita Acitya Putri; Alvina Damayanti; Retno Dwi Nyamiati
Jurnal Teknik Kimia Vol. 21 No. 01 (2026): JURNAL TEKNIK KIMIA
Publisher : Department of Chemical Engineering, Universitas Pembangunan Nasional Veteran Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnaltekkim.v21i01.28

Abstract

Water is a basic need of living things that is very important to maintain its quality so that it does not cause problems. The method that can be used to improve water quality is to carry out the coagulation method using moringa seed coagulant (moringa oleifera) and alum which has been proven to be able to improve the quality of water. Both coagulants can reduce the following parameters, turbidity by reducing TSD, neutralizing pH, reducing dissolved metal levels, color, and reducing microorganisms contained in it such as E-coli bacteria and total coliform. The results of this study indicate that the two coagulants can reduce the parameter values of TDS, turbidity, iron content, E-coli, color, and pH in the sample water to be below the maximum limit or in accordance with drinking water quality standards, but the nitrate parameter is not yet below the maximum level. The optimum concentration to improve the quality of well water into drinking water is 2.5 ppm with an optimum residence time of 4 weeks.
YOLOv8-Based Microplastic Detection and Quantification in River Water Microscopic Images Musthofa Galih Pradana; Retno Dwi Nyamiati; Husna Muizzati Shabrina; Muhammad Adrezo; Nurhuda Maulana
Journal of Applied Data Sciences Vol 7, No 2: May 2026
Publisher : Bright Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47738/jads.v7i2.1262

Abstract

Plastic particles with various size variations such as microplastics are environmental contaminants that are widely found in waters and have the potential to cause negative impacts. The process of identifying plastic particles using microscopic imagery manually takes a lot of time and considerable cost. In order to provide an alternative solution as part of early detection, microscopic image-based plastic particle detection was carried out with the YOLOv8 architecture, accompanied by an estimate of microplastic abundance in microplastic units per cubic meter. This study aims to develop and evaluate the detection of plastic particles in microscopic images of river water. This research dataset consists of 300 microscopic images taken from three river locations in Indonesia and annotated for model training and testing. The results of the evaluation showed that the proposed model had an aggregate performance value with a precision value of 0.786, recall of 0.66, and mAP@0.5 of 0.731. Additional test results show that with the addition of image resolution, the precision value can increase to 0.804 and the value mAP@0.5 increases to 0.762, even at the expense of computing time, which is also increasing. Extended scenario-based analysis showed that more than 87% of the detected objects fell into the category of small objects, affecting the localization sensitivity and variability of the estimated MPS value. This study also validated the results of object detection with FTIR-based laboratory tests using a full quantitative agreement between the model detection results and the identification of plastic particle materials at the sampling location level. The main contribution and findings of this study is an integrated evaluation framework for object detection, particle size characterization which is expected to be an alternative to the initial screening tool for plastic particle content.
Co-Authors A Hidayat Nurwahid Alfathony Krisnabudhi Alvina Damayanti Arnesya Ramadhani Arstyanto, Dimas Bambang Sugiarto Bambang Sugiarto Bambang Sugiarto Budi, Ryan Setya Carissavila, Calista Daniel Timotius Desty Arista Dian Purnami Handayani Didi Saidi Diwiyanto, Yusron Mahendra Dodi Eko Nanda Dwi Amalia Fadhli Suko Wiryanto Galang Ariyuda Heri Septya Kusuma I Wayan Rangga Pinastawa Ika Wahyuning Widiarti Kusuma, Heri Septya Mahreni Mahreni Mega Mustikaningrum Mohamad Endy Y Yulianto Muhamad Ridwan Muhammad Adrezo Muhammad Redo Ramadhan Musthofa Galih Pradana Nabila Aulia Balqis Nanda, Dodi Eko Niqotaini, Zatin Noor Amalia Nurhuda Maulana Nurkhamidah, Siti Nurul Afifah Arifuddin Putri Restu Dewati Rangga Pinastawa, I Wayan Ryan Setya Budi Sephia Lita Acitya Putri Septi Sri Rahmawati Setyaningtyas, Wiji Asih Shabrina, Husna Muizzati Siti Nurkhamdah Sonya Hakim Raharjo Suranto Suranto Suranto Timotius, Daniel Vera Listiawati Wahyu Meka Yeni Rahmawati, Yeni