WO2003053866A1

WO2003053866A1 - Water clarifying system

Info

Publication number: WO2003053866A1
Application number: PCT/JP2001/011175
Authority: WO
Inventors: Tsutomu Itaya
Original assignee: Sonar Co.,Ltd
Priority date: 2000-08-07
Filing date: 2001-12-20
Publication date: 2003-07-03
Also published as: JP4019209B2; JP2002045878A

Abstract

A water clarifying system, characterized in that a tube (1) in a spiral shape are packed with particulate carriers (5) impregnated with bacteria, and foul water is introduced into said tube (1) at one end thereof and is withdrawn from the other end of said tube. The tube (1) is preferably arranged so that the central axis O-O of the spiral is vertical. The carrier (5) is preferably prepared by forming a porous fired material originated from the sludge obtained in the field where the foul water to be clarified has been collected. The system allows the clarification of foul water at a reduced cost with a simple device.

Description

Specification

Water purification system

The present invention relates to a water purification system used to purify sewage containing organic pollutants such as sewage.

Background art

Heretofore, methods for decomposing pollutants by bacteria have been widely used for purification of sewage containing organic pollutants, and the activated sludge method, biofilm method, etc. are representative.

These conventional methods require complicated facilities consisting of treatment tanks, piping, etc. and a large space, and moreover, there is a problem that the running cost is high because aeration must be continuously performed. Under these circumstances, it is desirable to develop a method that can purify sewage at low cost with simple equipment. Disclosure of the invention

Therefore, the applicant developed the following water hatching system. That is, the water hatching system according to the present invention is characterized in that a helically arranged conduit is filled with a granular carrier impregnated with bacteria, and the sewage is put in from one end of the conduit and taken out from the other end. There is. In this water purification system, it is desirable to arrange the conduit so that the central axis of the helix is directed vertically.

When the sewage is introduced from one end of the conduit, the sewage flows through the gap between the carriers in the conduit to the other end of the conduit. During this time, fixed pollutants mixed in the sewage are filtered off to the support, and pollutants such as organic substances dissolved in the soil are decomposed by Pacteria. Thus, from the other end of the conduit, Is taken out.

If the conduits are spiral, conduits of the required length can be arranged in a narrow space, and the flow of sewage is smooth and stagnation does not occur, so that filtration and decomposition of pollutants are performed well. In addition, if the conduit is arranged so that the central axis of the spiral is in the vertical direction, the waste water will flow through the conduit by its own weight, so no pump is required to flow the waste water.

It is preferable to form the above-mentioned carrier from a porous baked product using sludge generated at the collection site of waste water to be purified as a raw material, and favorable conditions can be obtained as an environment in which pacteria grow and grow. Brief description of the drawings

FIG. 1 shows the installation of the water purification system. FIG. 2 is an enlarged cross-sectional view of a carrier. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be specifically described based on the embodiments shown in the drawings. FIG. 1 is a view showing the installation state of the water purification system according to the present invention, in which a spiral conduit '1' is provided with its central axis OO directed vertically, and the upper end opening of the conduit 1 is provided. Sewage water supply pipe 2 is connected to, and drain pipe 3 is connected to the lower end opening.

Three perforated plates 4 are provided on the inner side of the conduit 1 at substantially equal positions from the upstream side to the downstream side, and the inside of the conduit 1 is divided into four chambers A, B, C and D. ing. Then, each chamber is filled with a granular carrier 5 impregnated with bacteria. The particle size of the carrier 5 is the largest in the most upstream room A, and is smaller in the order of the following rooms B, C and D. The pore size of each perforated plate 4 is such that water passes but not the carrier 5. Also, inlets 6 a, 6 b, 6 c, 6 d for charging the carrier 5 and outlets 7 a, 7 b, 7 c, for taking out the carrier 5 corresponding to the respective chambers A, B, C, D. 7 d are provided respectively. These inlets and outlets are watertight and open. The door is attached.

Carrier 5 is a fired product such as ceramic, zeolite, etc., which is made of sludge generated at the collection site of waste water to be purified, and has a porous structure as shown in the enlarged cross sectional view of FIG. ing. Therefore, when the carrier 5 is impregnated with the bacterial solution, the bacteria enter the pores 5a of the carrier 5, and the carrier 5 becomes a good growth bed of bacteria. The carrier 5 is made of sludge produced at the collection site of the sewage to be purified, and thus is a favorable condition as an environment in which bacteria grow and grow. In addition, the use of sludge helps to reduce the amount of sludge and reduce the treatment of sludge. The carrier solution 5 may be impregnated with a bacterial solution immediately before using it to maintain the vitality of the bacteria.

The type of bacteria to be impregnated into the carrier 5 may be selected appropriately according to the type of contaminant contained in the water to be treated. For example, it is effective to combine aerobic bacteria with anaerobic Pacteria. In this case, if the support 5 has a porous structure, aerobic '14 bacteria will inhabit near the entrance of the surface of the support 5 and the entrance of the vacancies 5a, and anaerobic bacteria will be deep in the vacancies 5a. It is convenient because it is possible to get a parting like being inhabited. Also, bacteria that degrade non-organic properties, such as environmental hormones and dioxins, may be used.

When the carrier 5 impregnated with pacter is filled in the conduit 1 and the sewage is supplied from the sewage supply pipe 2 to the conduit 1, the sewage passes through the room A, the room B, the room C and the room D sequentially, and the sewage in between The fixed contaminants that are mixed in are filtered off to the carrier 5. In addition, contaminants such as organic substances dissolved in sewage are decomposed by bacteria. Thus, the purified water is taken out to the drainage pipe 3. If the carrier 5 filled with the fixed contaminants collected by filtration or the bacterial membrane exfoliated from the surface of the carrier 5 becomes clogged, the inlets 6a, 6b, 6c, 6d and the carrier 5 are removed. The outlet 7a, 7b, 7c, 7d may be used to replace with the new carrier 5.

Further, in the above embodiment, the spiral guiding is performed in a posture in which the central axis 1010 is directed in the vertical direction. By arranging the pipe 1 so that the sewage flows through the conduit under its own weight, the pump for making the sewage flow unnecessary, but with the central axis slightly inclined relative to the horizontal direction, the conduit 1 Can be placed, and this place can perform the treatment of sewage and sewage depending on the degree of inclination. Industrial applicability

As described above, the water purification system according to the present invention can purify sewage only by circulating sewage in one direction through a spiral conduit filled with a carrier impregnated with bacteria. Because of this, the system is simple, can be installed in a narrow space, and has a low maintenance cost. In addition, by using porous granular calcinated material, which uses sludge generated at the collection site of the sewage to be purified, as a carrier for impregnating bacteria, it is an environment for good growth and growth of bacteria. As a result, the purification capacity can be improved and sludge can be used effectively.

Claims

The scope of the claims

1. A water purification system characterized in that a spirally arranged conduit is filled with a granular carrier impregnated with bacteria, and sewage is introduced from one end of the conduit and removed from the other end.

2. The water purification system according to claim 1, wherein the conduit is disposed such that the central axis of the spiral points in the vertical direction.

3. The water according to claim 1 or claim 2, wherein the carrier is formed of a porous fired product made of sludge generated at a collection site of waste water to be purified. Purification system.