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All Journal Seminar Nasional Teknik Kimia Kejuangan Jurnal Rekayasa Mesin Dharma Bakti Jurnal Pengendalian Pencemaran Lingkungan (JPPL)
Dewi Wahyuningtyas
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Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Education Engineering Environmental Science Mechanical Engineering Social Sciences Other

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Optimasi Pembuatan Plastik Biodegradable dari Pati Kulit Singkong dengan Penambahan Asam Sitrat Sebagai Crosslinking Agent Dewi Wahyuningtyas; Paramita Dwi Sukmawati; Nur Muthia Al Fitria
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2019: PROSIDING SNTKK 2019
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Optimasi Pengambilan Triterpenoid dari Daun Pegagan (Centella Asiatica) dengan Metode Ekstraksi Bertingkat Dewi Wahyuningtyas; Haidir Febbyansyah Saputra; Sri Sunarsih
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 3 No. 1 (2021): JPPL, Maret 2021
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v3i1.538

Abstract

Pegagan (Centella asiatica) has potential as a medicinal plant because of its triterpenoids content. It can be used to accelerate the healing of bleeding wounds on the skin. This study aims to optimize ethanol volume and extraction time on triterpenoid yields obtained and to determine the physical characteristics of the extract of pegagan leaves by using soxhlet extraction method. Three main processes were first extraction using n-hexane as solvent at a temperature of 69oC for 120 minutes, then second extraction from the residue using a varied volume of ethanol as a solvent (250; 275; 300; 325 mL) at a temperature of 78oC for varied time (60; 90; 120; 150 menit), and drying the filtrate using a rotary evaporator. The results shown that when the volume of solvent and extraction time increased, the triterpenoid yields increased too. The optimal volume of ethanol was obtained at 300 mL for 120 minutes in extraction time with the triterpenoid yields of 0.59%.
Dampak Hujan Asam Pada Lingkungan Mochammad Imam Indra Gumirat; Dodi Satriawan; Dewi Wahyuningtyas
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 3 No. 2 (2021): JPPL, September 2021
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v3i2.788

Abstract

The term acid rain refers to the deposition of the atmosphere containing acidic compounds that fall to the earth in the form of rain, snow, particulates, gases and vapors and have a negative impact on the earth. Acid rain was first introduced by Ducros (1845) and later described by the English chemist Robert Angus Smith (1852) whose research studies linked the sources of acid rain to industrial emissions and included early observations of the damaging environmental effects. This article summarizes the scope of acid rain by providing the latest scientific advances on how emissions, deposition, and temporal trends of the pollutants that cause acid rain vary around the world. Considerable progress in reducing SO2 and NOX emissions is evident throughout North America and Europe. In contrast, the decline in SO2 started only about 10 years ago in China and the decline in NOX emissions only in the last few years. While in other parts of Asia such as India, these emissions continue to increase. Investigations of chemical contaminants in surface water, soil, fish, and vegetation show that recovery is slow and will unfold over decades as emissions and depositions continue to decline. Whether the affected ecosystems will return to their current acid rain conditions is uncertain and will likely depend on many other factors such as human disturbance and natural disasters and climate change. Gaining a better understanding of how acid rain interacts with various factors that affect ecosystem trajectories remains a challenge for the scientific community to address.
Rekayasa dan Pembuatan Mesin Pencacah Sampah Organik Dual Function Untuk Mendukung Sistem Konversi Limbah Organik menjadi Biogas Suparni Setyowati Rahayu; Gatot Santoso; Samuel Kristiyana; Anak Agung Putu Susastriawan; Satriawan Dini Hariyanto; Dewi Wahyuningtyas
Jurnal Rekayasa Mesin Vol 18, No 1 (2023): Volume 18, Nomor 1, April 2023
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v18i1.4041

Abstract

In recent years, domestic carbage become a serious problem since not all waste is managed properly. The organic waste has a potential as a feedstock for biogas production. Before the fermentation process of biogas production, it is necessary to enumerate organic waste with the help of a multi-function chopper. In the present work, dual function machine (chopping and milling process) is designed and fabricated. The machine is driven with a 5.5 HP gasoline engine with a two-way transmission system connecting to each process. The first line transmission system on the chopping with a pulley size of 2 inch diameter, two grooves mounted on the motor and a 3 inch pulley mounted on the chopper axis with a rotation speed of 2400 rpm. The second line transmission system on the milling uses a 12 inch diameter pulley with a rotation of 600 rpm. The test results show that the capacity of the machine was 60 kg/h with 1 cm chopping size.
Penerapan Teknologi Pembiakan Larva Black Soldier Fly Untuk Optimalisasi Pengelolaan Sampah Organik Di Kalurahan Panggungharjo Dewi Wahyuningtyas; Sukmawati, Paramita Dwi; Nurcahyo, Raden Wisnu; Hariyanto, Satriawan Dini; Sulistyaningsih, Eka; Rahayu, Suparni Setyowati; Yusuf, Muhammad
DHARMA BAKTI Dharma Bakti-Vol 6 No 2-Oktober 2023
Publisher : LPPM IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/dharma.v6i2.4509

Abstract

Kalurahan Panggungharjo, Kapanewon Sewon, Kabupaten Bantul telah memiliki Tempat Pengolahan Sampah (TPS) berbasis Reduce, Reuse and Recycle (3R) yang dikelola BUMDES Panggung Lestari. Untuk pengolahan sampah organik, warga secara mandiri atauoun berkelompok melakukan pengolahan sampahnya menjadi pupuk sehingga tidak dikelola oleh TPS. Permasalahan yang timbul dari pengolahan sampah organik tersebut adalah waktu proses pembuatan lama sekitar 30 hari, harga jual murah, dan lahan terbatas. Salah satu kelompok warga yang sudah melakukan pemilahan secara sederhana adalah Bank Sampah Barokah, Padukuhan Sawit, Kalurahan Panggungharjo. Kegiatan Bank Sampah masih berfokus pada sampah anorganik saja, sedangkan sampah organiknya dikelola di rumah masing-masing menjadi pupuk organik. Tujuan kegiatan pemberdayaan berbasismasyarakat ini mengoptimalkan pengelolaan sampah organik melalui budidaya larva black soldier fly (BSF) di mitra Bank Sampah Barokah. Metode yang dilakukan berupa sosialisasi dan penerapan teknologi tepat guna (pembuatan kandang budidaya larva BSF dan mesin pencacah sampah organik) kepada mitra yang telah dilaksanakan pada bulan Juli-September 2023. Hasil kegiatan berupa pengetahuan cara budidaya maggot sebagai pemakan sampah organik dan penggunaan teknologi tepat guna bagi warga Padukuhan Sawit. Kandang yangdibuat terdiri dari dua buah yaitu kandang penetasan telur dan pembiakan maggot. Kapasitas sampah organik yang dapat diolah maggot dalam kandang sebesar 30-35 kg/hari. Setiap hasil penetasan telur maggot sekitar 10 gram dapat menghasilkan hingga 30 kg maggot setelah 21 hari. Hasil kegiatan ini mampu mengatasi waktu proses pengolahan sampah organik yang lama dan produk maggot dapat digunakan sebagai pakan ternak di sekitar warga.
Co-Authors Anak Agung Putu Susastriawan DODI SATRIAWAN Dwi Sukmawati, Paramita Gatot Santoso Haidir Febbyansyah Saputra Hariyanto, Satriawan Dini Mochammad Imam Indra Gumirat Muhammad Yusuf Nur Muthia Al Fitria Nurcahyo, Raden Wisnu Samuel Kristiyana Satriawan Dini Hariyanto Sri Sunarsih Sulistyaningsih, Eka Suparni Setyowati Rahayu