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All Journal Jurnal Teknik ITS Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Jurnal Pengabdian Kepada Masyarakat Patikala Aptekmas : Jurnal Pengabdian Kepada Masyarakat Formosa Journal of Applied Sciences (FJAS) Dharma: Jurnal Pengabdian Masyarakat
Nyamiati, Retno Dwi
Department Of Chemical Engineering, Faculty Of Industrial Engineering, Yogyakarta Veteran National Development University
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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.
DIGITALISASI SISTEM KEUANGAN UMKM: PELATIHAN PRAKTIS PENCATATAN DAN PELAPORAN KEUANGAN DIGITAL UNTUK PELAKU USAHA SERAT AGEL DI DAERAH ISTIMEWA YOGYAKARTA Ridwan, Muhamad; Pradana, Musthofa Galih; Nyamiati, Retno Dwi; Pinastawa, I Wayan Rangga; Arifuddin, Nurul Afifah; Adrezo, Muhammad; Maulana, Nurhuda
Jurnal Pengabdian Kepada Masyarakat Patikala Vol. 4 No. 4 (2025): ABDIMAS PATIKALA
Publisher : Education and Talent Development Center of Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/patikala.v4i4.3043

Abstract

The digitalization of financial management has become an essential requirement for micro, small, and medium enterprises (MSMEs) to ensure their sustainability and growth in the modern economic landscape. Nevertheless, a significant proportion of MSME actors continue to encounter difficulties in systematically preparing financial statements and recording business transactions. This community engagement initiative was designed to enhance digital financial literacy among MSME artisans engaged in agel fiber crafts in the Sentolo area, Kulon Progo Regency, Special Region of Yogyakarta. The activity employed an interactive training method with a hands-on, practical approach, incorporating both the introduction and application of the SIAPIK platform, a digital tool aimed at facilitating transaction recording and the preparation of financial reports. The results of this activity demonstrate an improvement in participants' understanding of managing business finances through digital platforms. Additionally, participants also experienced an increase in motivation to implement technology-based financial recording. These findings also indicate their initial readiness to adopt digital transformation within their business environments.
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, Fakultas Teknik Industri, 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.
Co-Authors A Hidayat Nurwahid Alfathony Krisnabudhi Arnesya Ramadhani 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 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 Septi Sri Rahmawati Siti Nurkhamdah Sonya Hakim Raharjo Suranto Suranto Suranto Timotius, Daniel Vera Listiawati Wahyu Meka Wiryanto, Fadhli Suko Yeni Rahmawati, Yeni