Study on Filter Characteristics of Rice Hull Char-Coals

Abstract

The development of rice-hulls-combstion furnace was studied for the purpose of heat use.
With char-coals of that by-products the practical scale appartus, filtering filthy water of livestock waste, is studied in a separate way.
This paper reports the study results of characteristics which char-coals indicates on using as fiter. Seven kind materials, classfied into rice-hulls and its charcoals, each burning and crushing rate, became the object of the study. Fundamental material values related to filtering characteristics, were investigated.
With the same materials, under each pressure conditions, the flow resistance and compression strain were obtained and applied to Kozeny-Carman equation in oder to calculate imaginary capillary tube diameter of compression layer of every material.
In case of practical apparatus, final pressuring was calculated with the relation between flow rate and layer thickness.
Function of the filter layer was clarified.