Method for preparing pellets from rice husk and apparatus for removing odor using rice husk pellet bio-media

Abstract

A method for preparing pellets from rice husk includes: grinding rice husk; adding ammonia water to a mixture of ethylene vinyl acetate and poly(vinylacetate) to prepare a mixed, liquid binder; mixing the mixed, binder with the ground rice husk to obtain a binder / rice husk mixture; extruding the binder / rice husk mixture through an extruder; and cooling the extruded mixture at room temperature.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]Exemplary embodiments of the present invention relate to a method for preparing pellets from rice husk and an apparatus for removing odor using rice husk pellet bio-media; and, more particularly, to a method for preparing cylindrical rice husk pellets, including grinding rice husk, a by-product of rice milling, and extruding the ground rice husk with a binder through an extruder at high temperature, and to an apparatus for removing atmospheric odor using the prepared rice hush pellets as bio-media.[0003]2. Description of Related Art[0004]In biological deodorization methods which have recently attracted attention, materials for media on which microorganisms grow include ceramics, wood barks, porous polymer media, etc. However, the existing media have problems in that water and nutrients essential for the growth of microorganisms should be supplied in order for each medium to be used as a bio-medium and also that a decrea...

AI Technical Summary

Benefits of technology

[0008]Another embodiment of the present invention is directed to an apparatus for removing odor using rice husk pellet bio-media prepared in accordance with the method of the present invention, wherein the rice husk pellets have uniform porosity and may contain a large amount of water so as to function as bio-media to which microorganisms can adhere, and also wherein a high concentration of an organic matter elated from the rice husk pellets during water supply serves as an alkalinity source, such that a decrease in the pH of circulating spray water does not occur over a long period of time and further wherein the operating time of the apparatus can further be extended by supplying chemicals, and an odor removal operation may be carried out in one reactor without needing a water bath for reduction.

Problems solved by technology

However, the existing media have problems in that water and nutrients essential for the growth of microorganisms should be supplied in order for each medium to be used as a bio-medium and also that a decrease in pH of water caused by the oxidation of odor-causing compounds leads to the death of microorganisms.

For these reasons, there is a problem in that, when odor-containing air is introduced, a great pressure loss and channeling occur.

In addition, there is a problem in that the structure of the apparatus is complex, because, in order to prevent the pH of circulating spray wafer from decreasing, rice-straw and rice husk are placed separately in a water bath for reduction and a water bath for oxidation, respectively, such that the water baths are operated separately.

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