JPH04313400A - Sludge treating equipment - Google Patents

Abstract

PURPOSE:To obtain sludge treating equipment without increasing the material to be treated due to addition of chemicals by forming the equipment with an external pressure-type filter membrane module arranged respectively in the tank main bodies of the biological treating device and concentrator and a diffuser pipe arranged below the module. CONSTITUTION:Raw water (a) is introduced into a biological treating device 1 and treated with the air supplied from a first diffuser pipe 4. In this case, the water (b) is forcedly drawn off by a first membrane module 3, and the concd. sludge (c) is supplied to a concentrator 5. The sludge (c) is agitated by the air from a second diffuser pipe 10, and the water (d) is drawn off by a second membrane module 9. The highly concentrated sludge (e) is drawn off from the bottom and sent to a dehydrator. As a result, since the sludge is concentrated without adding chemicals, the material to be treated is not increased after concentration, and the succeeding treatment is efficiently performed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to sludge treatment equipment.

0002

2. Description of the Related Art Conventionally, there is a type of equipment for treating sludge as shown in FIG. That is, the aeration tank 21,
It is composed of a microbial treatment tank 22 and a concentration tank 23, and supernatant liquid A is discharged from the sludge put into the microbial treatment tank 22 from the aeration pipe 21. A part of the microbially treated sludge is supplied to the aeration tank 23 as return sludge B, and the other sludge is sent to the thickening tank 23. The solid content of the sludge concentrated in the thickening tank 23 sinks due to its gravity, and is then dehydrated. Note that the centrifugal concentrator 24 is used instead of the concentration tank 23.
In some cases, sludge to which chemical C has been added is concentrated and dehydrated using centrifugal force.

0003

[Problems to be Solved by the Invention] However, according to the above-mentioned conventional configuration, since the chemical C must be added to the sludge in order to thicken the sludge, the amount of material to be treated ( The problem was that the amount of sludge was increasing.

[0004] The present invention solves the above-mentioned problems, and aims to provide sludge treatment equipment that does not cause an increase in the amount of material to be treated due to the addition of chemicals.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes a microbial treatment device and a concentrating device for concentrating sludge discharged from the microbial treatment device. Each tank body is composed of an external pressure type filtration membrane module disposed within each tank body, and an aeration pipe disposed at the lower part of the external pressure type filtration membrane module.

[0006]

[Operation] With the above configuration, in the microorganism treatment device,
As microbial decomposition is performed, the filtrate is separated by the external pressure type filtration membrane module, and the sludge is concentrated to some extent.Furthermore, in the concentrator, the filtrate is separated by the external pressure type filtration membrane module, and the sludge is further concentrated. In this way, sludge can be concentrated to a high concentration without mixing chemicals.

[0007]

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 1 denotes a microbial treatment apparatus, which includes an apparatus main body 2, an external pressure type first membrane module 3 disposed at the upper part of the apparatus main body 2, and a first diffuser disposed at the lower part of the first membrane module 3. It is composed of a trachea 4. 5 is a concentrator connected to the microorganism treatment device 1 via a supply pipe 7 provided with a first pump 6;
An external pressure type second membrane module 9 placed in the upper part of the interior, and a second air diffuser 1 placed below this second membrane module 9.
It is composed of 0. Further, 11 and 12 are blowers for supplying air to each diffuser pipe 4 and 10, 13 is a connecting pipe connected to a dehydrator (not shown), and a second pump 14
is interposed.

In the above configuration, the raw water a introduced into the microbial treatment device 1 is treated with microorganisms by the air (oxygen) supplied from the first aeration pipe 4. At this time, the water b is forcibly extracted by the first membrane module 3, and this water b is discharged. The sludge c, which has been slightly concentrated by removing water by the first membrane module 3, is transferred to the microorganism treatment device 1.
is supplied to the concentrator 5 via the first pump 6 and the supply pipe 7 from the bottom. The sludge c supplied to the concentrator 5 is
It is stirred by the air from the second diffuser pipe 10, and the moisture d is forcibly extracted by the second membrane module 9.

[0009] Then, the water d from the second membrane module 9
is discharged, and the sludge in the concentrator 5 is further concentrated to a higher concentration. The highly concentrated sludge e is drawn out from the bottom of the thickening device 5 and sent to the dewatering device via the second pump 14 and the connecting pipe 13.

0010

Effects of the Invention As described above, according to the present invention, the concentration of sludge can be increased without adding chemicals, so the amount of material to be treated after concentration does not increase, and the efficiency of subsequent treatment can be improved. It is possible to aim for

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of sludge treatment equipment in one embodiment of the present invention.

FIG. 2 is a schematic diagram of a conventional sludge treatment facility.

[Explanation of symbols]

1 Microbial treatment equipment 2　　　　　Device body 3 First membrane module 4 First diffuser pipe 5 Concentration device 7 Supply pipe 8　　　　　Device body 9 Second membrane module 10 Second diffuser pipe

Claims (1)

[Claims] Claim 1: A microbial treatment device and a concentration device for concentrating sludge discharged from the microbial treatment device, wherein the microbial treatment device and concentration device are installed in respective tank bodies and in the tank body, respectively. A sludge treatment facility comprising an external pressure type filtration membrane module and an aeration pipe placed below the external pressure type filtration membrane module.