JPS62234592A - Contact bed for treating water - Google Patents

Abstract

PURPOSE:To facilitate breeding of microorganism and to promote digestion of sludge and to decrease excess sludge by providing a contact bed plate fitted with a flat net pipe to a contact bed frame which is allowed to coincide with a treatment tank with a definite interval. CONSTITUTION:Contact bed plates 3 fitted with flat net pipes 1 are provided to contact bed frames 2 which are allowed to coincide with a treatment tank such as a contact aeration tank and a settling tank with a definite interval. The fine flat net pipes 1 made of strands 4 are inexpensive mass-produced articles by extrusion molding, especially, the net pipes produced by polyethylene resin or the like are not eroded by a chemical agent, are good in sticking of microorganism, and excellent in peeling and separability of excess sludge. The contact bed is easily formed by manufacturing the contact bed frame 2 and only stretching the flat net pipe 1 thereto and it can be allowed to correspond to the treatment tank having various shapes. As a result, the breeding of microorganism is favorable and anaerobic phenomena are caused from the inner part when it is thickened and digestion of sludge is promoted, and it is available in reduction of excess sludge.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a contact bed for a contact aeration method for sewage treatment and a floating matter trapping rectifier plate for a settling tank.

(0) Conventional technology In the currently used contact bed honeycomb and laminated plates, the water flow is regulated on the plate surface and coincides in the plane direction, making the flow laminar, resulting in poor contact efficiency and low water flow. It is impossible to manufacture a type with a gap, there is a lot of unnecessary space, and the contact area per unit volume is small.

In addition, for the contact floor covered with a mesh sheet, a mesh made of thin strands has a strength problem, and only thick strands with a large mesh can be made, resulting in expensive materials. (c) The invention solved the problem. Problems to be Solved The present invention uses a resin mesh having a spacing of 3 to 3 as a base material for a contact bed.
Approximately 8B, wire thickness O, a~l rnWL, width 5
Light and flat mesh pipes with a number of +1 can be strung around depending on the concentration and load conditions of the sewage to be treated.The mesh makes it easy for biofilms to settle on the pipes, prevents filter bed blockage, and reduces direct contact. It becomes an inexpensive contact bed with many treatment effects.

2) Measures to solve the problem Contact floor frame suitable for treatment tanks such as contact aeration tanks and sedimentation tanks (2)
This is a contact floor characterized in that contact floor plates (3) to which flat mesh pipes (1) are attached are installed at regular intervals.

Figure 2 shows a contact bed in which flat tubes (1) are stretched vertically on a contact bed frame (2).

Figure 3 shows a contact floor in which a flat mesh pipe (1) is vertically stretched over a contact floor frame (2).

Figure 4 shows a contact bed in which flat mesh pipes (1) are strung across a contact bed frame (2).

Konota: The thin flat tube (1) of the wire (4) used in the present invention is an inexpensive mass-produced product made by extrusion molding, and in particular, those made from polyethylene resin or polypropylene resin are free from chemicals. The surface is stable, there is no elution of harmful chemicals, there is no adhesion of microorganisms, and there is excellent peeling and separation of excess sludge. )
By simply manufacturing a flat net pipe (1) and placing a flat mesh pipe (1) on it, it becomes a contact floor, and can be used with any shape of treatment tank.
In particular, for industrial wastewater treatment in small and medium-sized enterprises that do not have the financial or installation space to spare, by keeping the contact floor plates (3) small, a large contact area can be obtained, and a large amount of treatment can be achieved with a small device. It will be done.

The shape of the flat mesh pipe (1) eliminates unnecessary space, increases the contact area, and takes into account the fact that it is strong over time, and the contact area is effective throughout the area surrounding the strands (4). The more organisms adhere to the strands, the more anaerobic conditions occur in the contact area, promoting the digestion of sludge and helping to reduce excess sludge.

When used in a sedimentation tank, if a contact bed frame (2) is manufactured and installed to match the tank, suspended matter will be adsorbed and captured by the wire (4), and removed in a short time through physical filtration and biological filtration. Therefore, even if the residence time is small, a large treatment can be obtained with a small tank.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a flat mesh pipe of the contact bed base material. FIG. 2 is a perspective view of the first example of the present invention. FIG. 3 is a perspective view of a second example of the present invention. FIG. 4 is a perspective view of a third example of the present invention.

Claims (1)

[Claims] A water treatment contact floor characterized by cylindrical flat mesh pipes stretched at regular intervals.