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All Journal Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Kimia dan Rekayasa Jurnal Abdimas Sainteknol : Jurnal Sains dan Teknologi
Ichwan, Rizky
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Humanities Economics, Econometrics & Finance Education Health Professions Public Health Social Sciences Other

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Formulation and Characterization of Urea Slow-Release Fertilizer Based on Disposable Diaper Waste with Activated Carbon as Additives Kusumaningrum, Maharani; Rengga, Wara Dyah Pita; Hibatullah, Ridwan Dani; Nanggala, Pragusti Lintang Adhi; Ichwan, Rizky; Nada, Athiya Rihadatul ‘Aisy Qothrun
Sainteknol : Jurnal Sains dan Teknologi Vol. 23 No. 1 (2025): June 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v23i1.24961

Abstract

Disposable diapers are non-biodegradable waste that can pollute the environment. Disposable diapers contain super absorbent polymer (SAP) which has an absorption capacity of up to 1,000 times. SAP can be combined with activated carbon as a coating agent in urea slow-release fertilizer (SRF) production. This research aims to analyze the effect of urea SRF formulation (FA, FB, FC, and FD), with the combination of SAP and activated carbon, on the characteristics and nitrogen release behavior. SRF was characterized by Scanning Electron Microscope (SEM), Fourier Transform Infra-Red (FTIR), and Water Retention (WR) testing to determine the morphological structure, functional groups, and the ability of the sample to retain water during observation. The percentage of nitrogen release from SRF was calculated using the Kjeldahl method. The results of SEM characterization show that the thickness of the layer formed is about 63.5 µm. Different sample formulations affect the intensity of the functional groups produced. From all formulations, FD showed the highest WR and the lowest nitrogen release percentage with values of 80.2% and 20.4%, respectively. In general, it can be concluded that the combination of SAP from disposable diapers and activated carbon can be used as a coating agent in SRF production.
Literature Study Graphic Crystallization Of Hemihydrate And Dehydrate Reactions Of Phosporic Acid IIIA Unit Pt Petrokimia Gresik: Studi Pustaka Grafik Kristalisasi Reaksi Hemihydrate Dan Dehydrate Unit Phosporic Acid IIIA PT Petrokimia Gresik Ichwan, Rizky; Lutfiananda, Delfian
Jurnal Kimia dan Rekayasa Vol. 4 No. 2 (2024): Jurnal Kimia dan Rekayasa Edisi Januari 2024
Publisher : Program Studi S1 Teknik Kimia, Fakultas Teknik, Universitas Setia Budi

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Abstract

In the wet process, phosphoric acid production uses sulfuric acid as a penetration medium for phosphate rock. This process produces a significantly greater gypsum phosphate byproduct than the phosphoric acid product. In the wet process, hemihydrate reactions and dehydration reactions occur. The hemihydrate reaction and dehydration reaction are reactions between phosphate rock and sulfuric acid in the pre-mixer, digester and hydration tank. The approach to the crystallization process of phospho gypsum can be depicted on the crystallization graph between %CaO and %SO4. Data on the phosphoric acid production process at PA IIIA PT Petrokimia Gresik was taken in the period January – December 2022 using Egyptian, Jordan, and Moroccan phosphate rock and in August 2023 using Algerian type phosphate rock based on predetermined product parameters. By entering several production rate parameters, the results obtained show that there are visual differences in the crystallization graph of different phosphate rock raw materials. AbstrakDalam wet process produksi asam fosfat menggunakan asam sulfat sebagai media penetrasi terhadap phosphate rock. Proses ini menghasilkan produk samping phospo gypsum secara signifikan lebih besar daripada produk asam fosfat. Dalam wet process terjadi reaksi hemihydrate dan reaksi dehydrate. Reaksi hemihydrate dan reaksi dehydrate merupakan reaksi antara phosphate rock dengan asam sulfat di bagian pre-mixer, digester, dan tangki hidrasi. Pendekatan proses kristalisasi phospo gypsum dapat digambarkan pada grafik kristalisasi antara %CaO dan %SO4. Data proses produksi asam fosfat di PA IIIA PT Petrokimia Gresik diambil pada rentang bulan Januari – Desember 2022 yang memakai phosphate rock jenis Mesir, Jordan, dan Maroko dan bulan Agustus 2023 yang memakai phosphate rock jenis Aljazair berdasarkan parameter produk yang sudah ditentukan. Dengan memasukkan beberapa parameter rate produksi didapatkan hasil bahwa ada perbedaan secara visual dalam grafik kristalisasi dari perbedaan bahan baku phosphate rock.
MENGUBAH TANTANGAN MENJADI PELUANG: PENGELOLAAN LIMBAH POPOK BAYI MENJADI PUPUK ORGANIK UNGGULAN Kusumaningrum, Maharani; Imani, Nadya Alfa Cahaya; Wulansarie, Ria; Handayani, Prima Astuti; Hibatullah, Ridwan Dani; Nanggala, Pragusti Lintang Adhi; Ichwan, Rizky; Nada, Athiya Rihadatul ‘Aisy Qothrun
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 5 No. 1 (2024): Volume 5 No 1 Tahun 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v5i1.24767

Abstract

Semakin banyaknya limbah rumah tangga yang dihasilkan khususnya limbah popok bayi memerlukan penanganan khusus agar limbah popok tersebut bisa mempunyai nilai guna yang lebih tinggi. Limbah popok menjadi salah satu limbah terbesar yang membutuhkan usaha yang besar dalam pengolahannya karena sebagian besar masyarakat masih mempunyai kesadaran yang kurang akan adanya timbunan limbah popok bayi. Kandungan dalam limbah popok bayi seperti kotoran dan air kencing balita akan memberikan dampak negatif kepada masyarakat jika tidak segera ditangani. Oleh karena itu, perlunya pengolahan lebih lanjut agar limbah popok tidak semakin menumpuk. Lahan di Kelurahan Mangunsari, Kecamatan Gunungpati, Kota Semarang masih banyak yang digunakan sebagai lahan pertanian. Para petani lebih sering menggunakan metode sebar pupuk di atas tanah untuk metode pemupukannya. Hal ini telah dikaji bahwa nitrogen dari pupuk mudah terbawa ke aliran sungai dan menguap ke udara sehingga menurunkan efektivitas pemupukan dan biaya pemupukan yang diperlukan lebih tinggi. Kegiatan pengabdian telah dilaksanakan dengan cara metodologis dimulai dari identifikasi, sosialisasi, pelatihan, program aksi dan diakhiri dengan evaluasi. Dengan adanya pelaksanaan pegabdian terkait pengolahan limbah popok bayi menjadi pupuk organik yang ramah lingkungan dan media tanam akan membantu agar pemupukan pada tanaman menjadi lebih efektif. Adanya kandungan SAP pada limbah popok bayi yang bercampur dengan tanah juga dapat mempertahankan kadar air, sehingga menjaga ketersediaan air bagi tanaman pada musim kemarau.
Penerapan Mesin Spinner Peniris Minyak dan Perbaikan Kemasan Produk pada UMKM Keripik di Desa Kemetul, Kecamatan Susukan, Kabupaten Semarang Kusumaningtyas, Ratna Dewi; Prasetiawan, Haniif; Bahlawan, Zuhriyan Ash Shiddieqy; Widyastuti, Catur Rini; Imani, Nadya Alfa Cahaya; Rachmadi, Moch Faizal; Jannah, Reni Ainun; Ichwan, Rizky; S., Syifa Azzahra Putri
Jurnal Abdimas Vol. 29 No. 2 (2025): December 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/abdimas.v29i2.36448

Abstract

Desa Kemetul, Kecamatan Susukan is one of 208 villages developed into tourist villages in Kabupaten Semarang. Desa Kemetul is an area rich in agricultural products. Cassava and taro crops in this village are often processed into chips and serve as a source of income for residents. Common problems that often arise with chip products are the remaining oil content in the chips after frying and inappropriate product packaging. Thus, it reduces the quality and shelf life of the chip product. This Community Service activity focused on improving the chip production process at the Jago MSME in Desa Kemetul. The activity began with discussions and coordination with the local government and Jago MSME owner as partner. The activities included the implementation of an oil spinner machine and improved packaging with a portable sealer and silica gel. The application of appropriate technology can improve the chips quality and shelf life of products. It as well increases production capacity, profit potential, and support the development of Desa Kemetul as a tourist village.
Co-Authors Bahlawan, Zuhriyan Ash Shiddieqy Catur Rini Widyastuti, Catur Rini Hibatullah, Ridwan Dani Imani, Nadya Alfa Cahaya Jannah, Reni Ainun Lutfiananda, Delfian Maharani Kusumaningrum Nada, Athiya Rihadatul ‘Aisy Qothrun Nanggala, Pragusti Lintang Adhi Prima Astuti Handayani Rachmadi, Moch Faizal Ratna Dewi Kusumaningtyas Ria Wulansarie, Ria S., Syifa Azzahra Putri Wara Dyah Pita Rengga