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All Journal Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) KURVATEK
Wisnu Prayogo
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Social Sciences

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PENENTUAN KOEFISIEN TRANSFER MASSA PADAT CAIR PADA SISTEM TAWAS AIR DENGAN VARIASI KECEPATAN PUTARAN DAN DIAMETER PENGADUK Ani Purwanti; Muhammad Yusuf; Wisnu Prayogo; Uli Anita Ambarita
KURVATEK Vol 7 No 1 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i1.3128

Abstract

Solid-liquid mass transfer data is very necessary for the design of mass transfer equipment, in which the coefficient determination is influenced by the rotation speed and diameter of the stirrer. Thus, this study aims to investigate the effect of variations in stirring speed and stirrer diameter on the mass transfer coefficient of a solid-liquid system. This research was conducted in a stainlesssteel stirred vessel with a diameter of 5 – 19.5 cm and a height of 20 cm equipped with baffles. The alum used was sized to pass a 20mesh sieve and retained by a 30mesh sieve. Alum was then put into a vessel with water as a solvent and stirred with stirring speed varies from 100-500 rpm. Every 10 seconds, 5 ml of sample was taken to analyze the concentration of alum by measuring its density. This experiment was carried out with variations in the speed of the stirrer rotation and the diameter of the stirrer with a constant D/Dt ratio. The result showed that there is a relationship between the mass transfer coefficient with the variables studied for the alum-water granular system in a stirred tank. The calculation results show an average deviation error of 0.66%. The dimensionless equation can be used to accurately evaluate the mass transfer coefficient experiment.
Nature-Based Solutions in Urban Landscapes: Determinants Influencing Willingness to Participate in Composting in Metropolitan Jakarta, Indonesia Rachmat Mulyana; I Wayan Koko Suryawan; Nova Ulhasanah; Iva Yenis Septiariva; Wisnu Prayogo; Sapta Suhardono; Mega Mutiara Sari; Nur Novilina Arifianingsih; Dwinto Martri Aji Buana
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 14 No 3 (2024): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.14.3.451

Abstract

Amidst the rapid urbanization of Jakarta, the adoption of Nature-based Solutions (NbS) like composting offers a sustainable pathway for waste management and environmental rejuvenation. This research endeavors to discern the critical factors impacting the willingness of Jakarta's metropolitan populace to participate in composting activities. The study identified key determinants through a comprehensive analysis, including the availability of composting facilities, the expertise of trained cadres, the adoption of advanced composting technologies, and routine field monitoring. Furthermore, demographic nuances, specifically marital status, and age, surfaced as influential parameters. Singles and the younger age bracket (20-29 years) exhibited distinct attitudes towards composting, hinting at underlying generational and lifestyle-based disparities. The findings provide a foundation for tailoring policies and interventions that cater to Jakarta's unique urban fabric, promoting a more inclusive and influential composting culture.
Co-Authors Abd. Rasyid Syamsuri Ani Purwanti Dwinto Martri Aji Buana Iva Yenis Septiariva Mega Mutiara Sari Nova Ulhasanah Nur Novilina Arifianingsih Rachmat Mulyana Sapta Suhardono Suryawan, I Wayan Koko Uli Anita Ambarita