Analysis of the Sand Drying Process in the Biomass-Energized Rotary Drying Machine | Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences 2021

Herry Susanto Department of Mechanical Engineering, Darma Persada University, Jl. Taman Malaka Selatan No.22, Jakarta 13450, Indonesia; Graduate School of Renewable Energy, Darma Persada University, Jakarta, Indonesia

Roy Hendroko Setyobudi Graduate School of Renewable Energy, Darma Persada University, Jakarta, Indonesia; Department of Agriculture Science, Postgraduate Program, University of Muhammadiyah Malang, Jl. Raya Tlogomas No.246, Malang 65145, Indonesia

Danny Faturachman Department of Marine Engineering, Darma Persada University,Jakarta,Indonesia

Erkata Yandri Graduate School of Renewable Energy, Darma Persada University,Jakarta,Indonesia

Asep Hendiarko Priyatna Graduate School of Renewable Energy, Darma Persada University,Jakarta,Indonesia

Asyari Daryus Department of Mechanical Engineering, Darma Persada University,Jl. Taman Malaka Selatan No.22, Jakarta 13450,Indonesia

Zane Vincevica Gaile Department of Environmental Science University of Latvia,Jelgavas Street 1, Room 302, Riga LV-1004,Latvia

Satriyo Krido Wahono Research Division for Natural Product Technology – Indonesian Institute of Sciences, Jl. Jogja - Wonosari, km 31.5, Gunung Kidul, Yogyakarta - Special Region 55861, Indonesia

Rangga Kala Mahaswa Faculty of Philosophy, Universitas Gadjah Mada, Jl. Olahraga, Caturtunggal, Depok, Sleman, Yogyakarta 55281 - Special Region, Indonesia

Maizirwan Mel Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia,P.O. Box 10, 50728 Kuala Lumpur,Malaysia

Hebel brick (also known as a lightweight brick) is a product of modern building materials because it has a lighter weight but it is stronger than cement bricks and red bricks. Hebel bricks can withstand pressures of more than 4 MPa and are suitable as building wall materials, and speed up construction, and save on cement material costs. One of the most important materials is silica sand in the manufacture of Hebel bricks. The silica sand used in the manufacture of Hebel bricks must have a moisture content of 10 % to 15 %. The purpose of this study is to provide a solution in the form of a drying technique design using a rotational speed control method and a machine that uses biomass-based energy sources. This rotary drying machine is designed to be able to dry wet silica sand into silica sand with water content according to standards. The development of this drying machine begins with making an initial design and parameter analysis. Then proceed to the design, manufacture, and performance testing. The calculation results show that the wet base moisture content has decreased from 33.17 % to 16.58 %, the dry base moisture content decreased from 49.63 % to 19.88 % and drying eficiency also decreased from 63.11 % to 17.11 %. Hence it can be seen that the percentage of wet base moisture content reduced by 50 %, the percentage of dry base moisture content reduced by 59.94 %, and the percentage of drying eficiency reduced by 72.9 %.