JPS63248500A - Contact material in organic sewage treating facility - Google Patents

Abstract

PURPOSE:To effectively and efficiently treat sewage without being affected by the variations in the load by forming the main contact material body to be packed in a contact aeration tank with a contact plate consisting of a resin layer and the ceramic layers formed on both surfaces of the resin layer. CONSTITUTION:The main contact material body 8 is packed in the contact aeration tank 3 provided in org. sewage treating facilities. The main contact material body 8 is formed by the contact plate 11 consisting of the resin layer 11a and the ceramic layers 11b formed on both surfaces of the resin layer. As a result, the sewage passes through the main contact material body 8 and does not flow out to the sides unlike the conventional process, microbes are easily deposited on the ceramic layer, hence the microbe membrane is easily formed on the surface of the contact plate 11, and sewage treatment can be effectively and efficiently carried out without being affected by the variations in the load, namely the discharge amt. of sewage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a contact material for an organic sewage treatment facility that purifies organic matter contained in organic sewage such as gray water and human waste.

[Prior art and problems to be solved by the invention] In general, organic sewage treatment facilities have
As disclosed in the 92% Publication, multiple contact material cases are stacked in a contact aeration tank provided in a treatment facility, and each contact material case is filled with contact materials made of porous members of various sizes. While the wastewater flows through the contact materials, aerobic microorganisms growing on the surface of each contact material and anaerobic microorganisms growing deep within the pores of the contact materials dephosphorize and dephosphorize the wastewater. Denitrification, BOD removal, denitrification88. Jl12N
There are those that process H4 etc.

However, in the above-mentioned prior art, the contact material of various sizes is filled in the contact critical tank, so the flow resistance of the sewage is large, which makes it difficult to bring the sewage into even contact with the contact material. This leads to a decline in ability.

In recent years, the contact material has been formed into a honeycomb shape using synthetic resin, etc., and is placed with the upper and lower ends of the contact aeration tank as the frontage ends. It is known that the wastewater grows into a membrane and digests the pollutants contained in the wastewater as it passes through each cell.

However, since the resin surface is flat, it is difficult for microorganisms to adhere to it, and the microorganisms are easily washed away together with the treated water, inhibiting the formation of a microbial film and reducing the sewage purification ability.

On the other hand, in order to prevent the microorganisms from flowing out, it is conceivable to form the contact material main body with a porous member and allow the aerobic microorganisms to adhere to the micropores of this member. Sewage flows laterally through the micropores, creating turbulent flow that makes it difficult for the sewage to come into even contact with the surface of the contact material body, resulting in a reduction in sewage treatment ability.

As a result of the above, there is a problem in that the conventional contact material has a limit in its sewage treatment capacity, and when the load change is 0'', that is, a large amount of sewage is discharged, the treatment capacity is significantly reduced.

[Object of the Invention] The present invention has been made in view of the above circumstances, and creates an environment in which there is little outflow of microorganisms and a microbial film is easily generated on the surface of the contact material, and as a result, it is affected by load fluctuations. It is an object of the present invention to provide a contact material for F-stage organic sewage treatment, which can effectively and efficiently treat sewage without causing wastewater treatment.

[Means and effects for solving the problems] Organic sewage according to the present invention! l! The main body of the contact material, which is loaded into a contact aeration tank installed in an organic sewage treatment facility, is a contact plate made of a resin layer and a ceramic layer formed on both sides of this resin layer. It is something that is being formed.

In other words, wastewater passing through the surface of the contact plate constituting the contact material main body is purified by microorganisms grown in a film form attached to the ceramic layer formed on the surface of the contact plate. Furthermore, since a resin layer is formed in the middle of the contact plate, the wastewater flows along the contact plate without penetrating the contact plate. Therefore, the wastewater is evenly contacted with the contact plate and has good digestion performance.

[Embodiments of the invention] Hereinafter, the present invention will be described in detail with reference to the drawings.

The drawings show an embodiment of the present invention, with FIG. 1 being an enlarged view of the contact material, FIG. Figure 2 is a sectional view of rV-IV, Figure 5 is an enlarged view of the sludge return pipe, and Figure 6 is V of Figure 2.
The I-Vl sectional view and FIG. 7 are plan views of the organic sewage treatment facility. In addition, in the example shown in the figure, Aritai sewage treatment facility FI! A small combined septic tank is shown as an example of a facility.

In these figures, reference numeral 1 is the septic tank main body, and inside this septic tank main body 1 there is a septic tank where anaerobic microorganisms are grown.
Sedimentation 11 tank 2a, second sedimentation separation tank 2b, contact aeration Wi3 in which aerobic microorganisms are grown, and sedimentation tank 4 are divided in order from the left in FIG. 2 via partition walls 5a, 5b, and 5c. It is formed.

An inflow pipe 6 that communicates with a domestic drainage pipe (not shown) is inserted into the first precipitate 1IIiWI2a with its outlet oriented toward the bottom of the first precipitate m tank 2a. . In addition, the outflow port formed in the upper part of the partition wall 5a of the second sedimentation separation 1ff2b is exposed above the contact aeration tank 3, and the inflow port is connected to the second sedimentation separation 11i.
An advection pipe 7 directed toward the bottom of the ff tank 2b is fixedly installed. A pair of advection tubes 7 are arranged on both sides of the partition wall 5a with a predetermined interval therebetween. The first and second precipitate fractions a2a and 2b are communicated via a notch (not shown) formed at the upper end of the partition wall 5C, and are connected to the second precipitate separation tank 2b. The supernatant of the sewage that has flowed into the tank 2a is flown into the tank 2a.

Further, a pair of contact material bodies 8 are attached to the contact aeration tank 3 . The contact material bodies 8 are disposed facing each other in a direction perpendicular to a plane connecting the second sedimentation separation 12b and the sedimentation tank 4.

Each of the contact material bodies 8 is formed by arranging a plurality of contact plates 11 in parallel at predetermined intervals using spacers (not shown), and as shown in the figure, each of the contact plates 11 is the partition wall 5a.

5b in parallel. Roughly speaking, a frame plate 12 is fixed to the opposing surfaces of the pair of contact material bodies 8, and a gap of a predetermined width is formed between the frame plates 12 of each of the contact material bodies 8.

Further, as shown in FIG. 1, the contact plate 11 is formed in a layered manner by a resin layer 11a and porous ceramics 1111b formed on both surfaces of the resin layer 11a.

The resin layer 11a in the figure has a thickness of about 0.6 m.
The ceramic layer 11b is a ceramic sheet having a thickness of about 0.3 to 2.0 mm attached to both sides of the resin layer 11a. Aerobic microorganisms grow in the form of a film on the micropores formed in 11b and on the surface.

In addition, the above contact aeration I! 3 and in the gap formed between the facing surfaces of each of the contact material bodies 8, an aeration pipe 9 is disposed, which communicates with an air blower (not shown). Also,
At the bottom of each of the contact material bodies 8 and on both sides of the aeration pipe 9, backwash pipes 10 are arranged parallel to the aeration pipe 9. This backwash pipe 10 is used when cleaning each of the contact plates 11 mentioned above.

Further, the partition wall 5 exposed on the contact aeration tank 3 side
A midway portion of the sludge return pipe 18 is fixedly installed at b. This sludge return pipe 18 faces between the pair of contact material main bodies 8, and the inlet 18a opened at the lower end of this sludge return pipe 18 is connected to the contact aeration 4F! ! It is oriented towards the bottom of 3. Further, the upper part of this sludge return pipe 18 crosses the upper part of the second sedimentation separation tank 2b, and the upper part of the sludge return pipe 18 crosses the upper part of the second sedimentation separation tank 2b, and the second sedimentation fraction 1lIIll! ! An outflow port 18b facing above 2a and opened at its tip is opposed to the liquid level of this first precipitate M tank 2a.

A blower device (not shown) for supplying air to the aeration pipe 9 is connected to the sludge return pipe 18 via a return air pipe 18c.

In addition, the contact aeration tank 3 and the sinking vJ tank 4 are connected to both tanks 3 and 3.
, 4 are communicated through an opening 5c cut out in the upper end of the partition wall 5b that partitions the contact aeration tank 3.
through which it flows into the settling tank 4.

Furthermore, the sludge hopper 13 is placed at the bottom of this sediment "4f14".
are integrally formed. This sludge hopper 13 is converged toward the center bottom of the partition wall 5b, and a sludge return port 14 communicating with the contact aeration tank 3 is provided at the bottom of the partition wall 5b facing the sludge hopper 13. is opened.

Note that the sludge return port 14 faces the inflow port 18a of the sludge return pipe 18.

Further, a disinfection tank 15 is provided at the center of the upper part of the sedimentation tank 4. The supernatant of the treated water that has flowed into the sedimentation tank 4 flows into the disinfection tank 15 via a baffle 15a. Incidentally, reference numeral 16 is a chemical cartridge loaded with chlorine or the like for disinfecting the treated water that has flowed into the disinfection tank 15.

Further, the inflow end of a discharge pipe 17 communicating with a river or the like is inserted into the supernatant portion of the disinfection tank 15.

Further, on the upper surface of the septic tank main body 1, the above-mentioned first.

A manhole 19 communicating with the second sedimentation separation tanks 2a, 2b, the sedimentation tank 4, and another manhole 20 communicating with the contact aeration tank 3 are formed (see FIG. 7).

Next, the operation of the embodiment with the above configuration will be explained.

Gray water discharged from households and sewage such as human waste are first collected in a 1 m2 sediment formed in the septic tank body 1.
The sewage flows into the sewage through the inflow pipe 6, where the relatively large suspended matter contained in the sewage is settled, and the anaerobic microorganisms grown in the first sedimentation separation tank 2a desorb the sewage. Phosphorus, denitrification, BOD removal, SS removal, N84 removal
etc. will be processed.

Next, the supernatant of the sewage treated with anaerobic microorganisms in the first sedimentation separation tank 2a flows into the adjacent second sedimentation separation tank 2b through the notch formed at the upper end of the partition wall 5c, and is further anaerobically treated. Treated with microorganisms. The sewage treated in this second sedimentation separation tank 2b and the sludge floating in this second sedimentation separation MJ2b pass through the 4tI flow pipe 7,
It flows into the contact aeration tank 3 next to it.

As shown in FIG. 3, air is fed into the contact aeration tank Wi3 through an aeration pipe 9 installed at the bottom of the contact aeration tank Wi3. The air is floated through the gap between the frame plates 12 provided on the opposing surface of the contact material main body 8, and during this time, this air is absorbed into the liquid, and the floating of this air generates a water flow in the waste water. This water flow flows through the contact plate 1 constituting each contact material main body 8.
1, two swirling flows in opposite directions,
The wastewater that has flowed into the contact aeration tank 3 is moved along the two swirling flows, and the organic matter contained in the wastewater circulates within the contact aeration tank 3 and is gradually and uniformly dispersed.

By the way, since the intermediate layer of the contact plate 11 is a resin layer 11a made of FRP or the like, the dirty water passing through the surface of the contact plate 11 passes through the contact plate 11 and flows laterally, causing the swirling. It does not disturb the flow and provides a good environment for microbial film formation.

Further, the organic matter contained in the wastewater is removed from the contact plate 11.
0 surface ceramic II! While flowing through the ceramic Fr11b, it is decomposed and oxidized by an aerobic microbial film formed on the ceramic Fr111b.

These aerobic microorganisms are distributed over a porous ceramic layer 11b formed of a ceramic sheet or the like on the surface of the contact plate 11.
Since the aerobic microorganisms are attached to the surface of the porous layer 11b, they are difficult to be washed away, and the aerobic microorganisms are sufficiently supplied with oxygen through the swirling flow. The formation of microorganisms is promoted, and an environment in which microorganisms can easily grow is created. As a result, the decomposition and oxidation of the organic matter in the sewage can be carried out effectively and efficiently without being affected by load fluctuations, ie, sewage treatment.

Further, the digested sludge and undigested sludge in the contact aeration tank 3 fall to the bottom, and are returned to the first sedimentation separation tank 2a through the sludge return pipe 18 to be reprocessed. Therefore, the digested sludge and undigested sludge do not accumulate at the bottom of the contact aeration 13.

By the way, the swirling flow generated in the contact aeration tank 3 is as follows:
Since the flow is perpendicular to the plane connecting the second sedimentation tank 2b and the sedimentation tank 4, this swirling flow causes untreated sewage to flow into the sedimentation tank 4 or to the second sedimentation tank 2b. It will not flow backwards.

Next, the treated water subjected to the aerobic microbial treatment flows into the adjacent sedimentation chamber 14 through the opening 5C opened in the upper part of the partition wall 5b.

When this treated water flows into the settling chamber 4, a small amount of sludge contained in the treated water is settled into a sludge hopper 13 formed at the bottom of the settling tank 4.

This sludge is guided to the sludge hopper 13 and flows into the bottom of the contact aeration tank 3 through the sludge return port 14 opened in the partition wall 5b facing the bottom of the sludge hopper 13. Therefore, sludge does not accumulate at the bottom of the upper sedimentation tank 4.

This sludge and the treated water staying at the bottom of the contact aeration tank 3, together with the above-mentioned digested sludge and undigested sludge, are sent through the sludge return pipe 18 by air pressure sent from a blower device (not shown). The precipitate is returned to the first sedimentation tank 2a, then flows into the second sedimentation tank 2b, where it is treated with anaerobic microorganisms again, and then transferred to the advection tube 7.
, and then flows back into the contact aeration 4!3 where it is treated with aerobic microorganisms.

In this way, the sewage and sludge that have flowed into the septic tank main body 1 are transferred to the first and second sedimentation separation tanks 2a.

2b, contact aeration tank 3, sedimentation tank 4 are circulated and microbial treatment is repeated, so dephosphorization, denitrification, n1BOD,
SS removal and NH4 removal processing can be performed reliably and efficiently.

The supernatant of the treated water that has flowed into the sedimentation tank 4 is transferred to a disinfection tank 15 provided in the sedimentation tank 4 through a baffle 1.
5a, and after being disinfected with chlorine, the water is discharged from the discharge pipe 17 into a river or the like as conditioned water.

Note that the contact material main body 8 is not limited to one in which contact plates 11 are arranged in parallel at regular intervals, and may be formed by molding a resin material into a honeycomb shape as shown in FIG. 8, or as shown in FIG. The resin layer 11a is formed by molding into a corrugated shape as shown in FIG.
A ceramic layer 11b made of a ceramic sheet or the like may be formed on the surface by pasting or other means.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, the ceramic layer may be formed by applying ceramic particles to the surface of the resin layer by soluble means or the like. Additionally, the contact material can be adopted in all organic wastewater treatment facilities.

[Effects of the Invention] As explained above, according to the present invention, the contact material main body loaded into the contact aeration tank provided in the organic sewage treatment facility includes a resin layer and a ceramic layer formed on both sides of the resin layer. Since it is formed of a contact plate consisting of
Sewage does not penetrate the main body of the contact material and flow out to the side, and microorganisms are easily attached to the ceramic layer, resulting in an environment in which it is difficult for a microbial film to be generated on the surface of the contact material. Sewage treatment can be carried out effectively and efficiently without being affected by load fluctuations, that is, the amount of wastewater discharged.

Furthermore, since the surface of the contact plate is formed of a ceramic layer, it is strong against acidity, and has excellent durability and chemical resistance.

Furthermore, since the contact plate is made of resin and ceramic, there is no corrosion at all and the service life can be extended.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of a small-sized combined septic tank, Fig. 2 is a sectional view taken along line II-m in Fig. 1, and Fig. 3 is a longitudinal sectional view of a small-sized combined septic tank.
The figure is a ■-■ cross-sectional view of Figure 1, Figure 4 is an enlarged view of the contact material,
Figure 5 is an enlarged view of the sludge return pipe, and Figure 6 is VI- of Figure 1.
FIG. 7 is a plan view of a small combined septic tank, and FIGS. 8 and 9 are perspective views of main parts of other embodiments. DESCRIPTION OF SYMBOLS 1... Septic tank main body, 3... Contact aeration tank, 8... Contact material main body, 11... Contact plate, 11a... Resin layer, 1
1b...Ceramic layer. Figure 1 Figure 4

Claims (1)

[Claims] The main body of the contact material loaded into a contact aeration tank installed in an organic sewage treatment facility is formed of a contact plate consisting of a resin layer and ceramic layers formed on both sides of the resin layer. Contact material for organic sewage treatment facilities.