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All Journal KURVATEK Mekanika: Majalah Ilmiah Mekanika
Wibawa Endra Juwana
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences

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APLIKASI MICROBUBBLE GENERATOR POROUS-VENTURI PADA PENGOLAHAN AIR LIMBAH BUATAN Lathifa Putri Afisna; Wibawa Endra Juwana
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1818

Abstract

Abstract The limitation of clean water due to water pollution from household and industrial waste, it is necessary to develop an environmentally friendly waste water treatment technology and installation easily. Microbubble generator (MBG) is used to produce oxygen needed by bacteria to decompose wastewater. In this study a porous-venturi MBG was designed to be installed in an artificial wastewater pool. The parameters to be measured are mass transfer coefficient (KLa), dissolved oxygen (DO) and chemical oxygen demand (COD). KLa values ​​are measured using DO meters mounted 60 cm and 180 cm from the MBG. Liquid flowrate is set 30-80 lpm and gas flowrate is set 0.1, 0.4 and 1 lpm. Based on the results of the study, the increase in liquid flowrate at all measurement distances causes the KLa value increase too, but the increase in gas flowrate does not significantly affect. The higher DO value will reduce COD value in artificial waste water below to 100 mg /L. Keywords :Microbubble, venturi, DO, COD, KLa
Design, Production Cost, and Air Flow Distribution of Biomass Pellet Furnace Heru Sutanto; Suyitno Suyitno; Wibawa Endra Juwana; Tito Gusti Nurrohim
Mekanika: Majalah Ilmiah Mekanika Vol 20, No 2 (2021): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v20i2.49232

Abstract

Biomass attracts a great deal of attention to be converted into green fuels in the form of pellets. The furnace is needed to burn pellets to generate heat up to 300 kW. In addition to meeting the heat capacity needs of the small and medium-sized industries, furnaces must also be competitive in terms of price. The purpose of this study is therefore to obtain details of the cost of manufacturing the furnace and the model of air flow that occurs in the furnace. The cost of production of the furnace includes manufacturing costs, assembly costs, machining and repair costs. The findings revealed that the key portion of the cost of the furnace was a material cost of 77%. The findings of the simulation showed that the total pressure difference of up to 850 Pa and had to be resolved by air-supplying blowers. The gas velocity ranges from 2 to 10 m/s and rises significantly near the exit to 42 m/s.
Co-Authors Heru Sutanto Lathifa Putri Afisna Suyitno - Tito Gusti Nurrohim