Development of Ozone Technology Rice Storage Systems (OTRISS) for Quality Improvement of Rice Production

Muhammad Nur1, E.Kusdiyantini2, W.Wuryanti3, T.A. Winarni4, S.A. Widyanto5, and H. Muharam6 

1Department of Physics, 2Department of Biology, 3Department of Chemistry, Faculty of Science and Mathematics, Diponegoro University, Semarang, Indonesia

4Department of Fishery Product Technology, Faculty of Fisheries and Marine Science, Diponegoro University, Semarang, Indonesia

5Department of Machanical Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia

6Department of Management, Faculty of Business and Economics, Diponegoro University, Semarang, Indonesia

E-mail: m.nur@undip.ac.id

Abstract. This research has been carried out by using ozone to address the rapidly declining quality of rice in storage. In the first year, research has focused on the rice storage with ozone technology for small capacity (e.g., household) and the medium capacity (e.g., dormitories, hospitals). Ozone was produced by an ozone generator with Dielectric Barrier Discharge Plasma (DBDP). Ozone technology rice storage system (OTRISS) is using ozone charateristic which is a strong oxidizer. Ozone have a short endurance of existence and then decompose, as a result produce oxygen and radicals of oxygen. These characteristics could kill microorganisms and pests, reduce air humidity and enrich oxygen. All components used in SPBTO assembled using raw materials available in the big cities in Indonesia. Provider of high voltage (High Voltage Power Supply, 40-70 kV, 23 KH, AC) is one of components that have been assembled and tested. Ozone generator is assembled with 7 reactors of Dielectric Barrier Discharge Plasma (DBDP). Rice container that have been prepared for OTRISS have adjusted so can be integrated with generator, power supply and blower to blow air. OTRISS with a capacity of 75 kg and 100 kg have been made and tested. The ability of ozone to eliminate bacteria and fungi have been tested and resulted in a decrease of microorganisms at 3 log CFU/g. Testing in food chemistry showed that ozone treatment of rice had not changed the chemical content that still meet the standard of chemical content and nutritional applicable to ISO standard milled rice. The results of this study are very likely to be used as an alternative to rice storage systems in warehouse. Test and scale-up is being carried out in a mini warehouse whose condition is mimicked to rice in National Rice Storage of Indonesia (Bulog) to ensure quality. Next adaptations would be installed in the rice storage system in the Bulog.

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