Abstract: A cleaning device of a screw press for filtrating and dehydrating garbage in which a plurality of dehydrate liquid guide grooves are circumferentially formed on an inner surface of a support cylinder which supports an outer surface of the filtration cylinder so as to permit the support cylinder to be less in contact with the filteration cylinder. Moreover, a dehydrate fluid is discharged through discharging holes, thereby improving filtration efficiency. In addition, a compression air, a pressurized water or high pressure steam is injected from the circumferential surface of a screw being rotated within the filtration cylinder to enable garbage remaining at a plurality of filtrating holes to be completely and cleanly discharged outside, thereby enhancing filtration effectiveness.

Abstract: An improved filtration for treating waste product which comprises a pair of filter belts, a plurality of squeezing rollers operatively connected to the filter belts, a plurality of fixed sprayers in the vicinity of the plurality of rollers for spraying hot steam, heating members for heating the rollers with hot steam, hot water, or hot air in the interior thereof, and a pair of cleaning members for cleaning and washing the belts, whereby the waste product is easily filtrated and dehydrated through the coaction between the belts and the plurality of rollers, and the belts are washed clean by the cleaning members.