US 6,146,540 A · Dehydration of sludge by injecting sludge into a sequentially connected series of permeable bags and then squeezing the bags

Abstract

A plurality of unit bags 2a, 2b . . . are composed of a permeable strip-shaped nonwoven and arranged in a successive fashion without break so that they can be easily accommodated and stored by being rolled. An annular elastic body 5 disposed around an opening 3a formed to an end of each bag 2a permits the opening 3a to be opened. Since an optically sensing object or a magnetically sensing object is disposed around the opening 3a or at a position spaced apart from the openings 3a, 3b . . . a prescribed distance, the portion of the sensing object can be positioned by a sensing device 15. Further, when, for example, sludge, and the like containing water are accommodated in a waste accommodating bag 1 and squeezed, the sludge, and the like can be easily dehydrated. With this arrangement, there can be provided a waste accommodating bag, a waste treatment system using the waste accommodating bag and a waste treatment apparatus capable of simply dehydrating water-containing wastes such as sludge in a sludge tank (including a pond, lagoon, and the like as the target of the present invention) and easily and economically disposing of the wastes as well as stably subjecting the sludge in a combined treatment tank to a biological treatment.

Claims8

Dependent claims

A waste treatment system using a waste accommodating bag, comprising the steps of:

accommodating sludge waste discharged from a sludge tank into a series of permeable bags fed successively through the openings of the bags, said series of permeable bags comprising a series of laterally long strip-shaped members with an upper edge thereof opened and a lower edge thereof closed;
dehydrating the sludge waste by squeezing the series of bags in which the waste is accommodated;
and
returning the water squeezed from the sludge waste to the sludge tank.

1 more element

A waste treatment apparatus, comprising:

a sludge tank for accommodating water-containing sludge waste;
a strip-shaped permeable waste accommodating bag having a plurality of unit bags to which openings are formed at prescribed intervals;
a bag feed device for successively feeding the waste accommodating bag for accommodating the sludge waste discharged from the sludge tank in a prescribed quantity and positioning the openings of the respective unit bags just below the discharge port of a storage tank;
a position sensing device for sensing the opening of the unit bag fed just below the discharge port and transmitting the position signal of the opening to the bag feed device;
a dehydrating device for squeezing and dehydrating the sludge waste accommodated in the waste accommodating bag through the opening positioned just below the discharge port of the storage tank;
and
a liquid return device for returning the squeezed water to the sludge tank.

4 more elements

Dependencies are inferred from the claim text.

Dehydration of sludge by injecting sludge into a sequentially connected series of permeable bags and then squeezing the bags

Life of this patent

Dehydration of sludge by injecting sludge into a sequentially connected series of permeable bags and then squeezing the bags

Life of this patent

Abstract

Claims8