JPS5929075A - Apparatus for evaporating treated sewage - Google Patents

Abstract

PURPOSE:To execute efficient evaporation treatment even on a place unfavorable in weather conditions, by placing the evaporator of treated waste water provided with network evaporation bed groups installed vertically in plural stages in a hothouse made of a light transmitting material, and ventilating the house through the inlet and outlet openings. CONSTITUTION:The treated waste water obtd. by treating the waste water in a waste water treating plant A is stored in a pit, and fed to sprinkling tubes 3A with a pump 3B, and trickled downward to each stage of the network evaporation bed groups arranged vertically in plural stages and is evaporated spontaneously. The bed 2 is constituted with a steel or resin net. The nonevaporating residual water is filtered through a sand bed 4 installed in the lower part, and recycled to the pit 1 flowing on a water impermeable sheet 5. This evaporator is placed in a hothouse 7 made of a light transmitting material, a glasslike suction opening 8a is formed at the lower part of one wall 7A of the hothouse 7, and a glasslike exhaustion opening 8B is formed in the higher part of the other wall 7A' opposite to the wall 7A to accelerate the evaporation of the water by ventilation of the air flowing these openings 8A, 8A'.

Description

[Detailed Description of the Invention] With the strengthening of wastewater regulations based on wastewater standards set by the country and prefectures, various sewage treatment technologies have now become extremely sophisticated, and the technology is optimized depending on the quality of the effluent water. It is becoming less difficult to design such systems.
However, for example, in sewage treatment sites such as Tomi landfill sites and rural sewage treatment plants, there are many cases where the discharge of treated water is not even allowed due to secondary pollution caused by the discharge of treated water. There is a need to establish a practical and effective non-discharge treatment device to deal with this problem.

Conventionally known non-discharge treatment methods include ■Complete recycling @ lights, cooling, infiltration into the soil, and natural evapotranspiration into the atmosphere, but ■ and @ methods require a large amount of energy. ,
In particular, the running cost of the 21st sewage treatment plant is uneconomical due to the huge running cost. Also, the means of ○ are the above-mentioned ■ and @
Although it is more effective in terms of energy consumption than other methods, it is undesirable from the standpoint of water quality conservation, such as contamination with groundwater. In this respect, O's method uses natural energy such as wind and solar heat, and there is no need to worry about water 'ffA staining, so it is much superior to the aforementioned methods ■, @, and O in terms of economy and water quality conservation. .

However, the specific means of natural evapotranspiration to the atmosphere that has been conventionally implemented is to supply f1j water treated water into the sand bed,
This method allows evaporation to occur at the surface of the soil that comes in contact with the atmosphere.
There is a limit to the evaporation surface per unit area, and evaporating a large amount of treated sewage water requires a huge amount of land area, resulting in a large-scale facility.

In order to solve the problems of conventional means with the above-mentioned economical non-discharge treatment using natural evapotranspiration, the present applicant first installed a pit for storing treated wastewater, and a pit installed in multiple stages above and below. a net-like evaporation bed group, a device for pumping the sewage treated water in the pit to the upper part of the reticulation evaporation bed group and sprinkling water downward, and sand for filtering unevaporated residual sewage and returning it to the pit. We developed a sewage treatment water evaporation treatment device equipped with a bed and applied for patent application H'1.

With this previously applied device: (1) Compared to the required floor area of 10, it is possible to form an air-contact evaporation surface that is multiple times or almost multiple times the required floor area;
Very efficient evaporation treatment can be carried out with a small amount of land area.

(2) Even if a partial discharge method is adopted or must be adopted instead of total evaporation, the sand bed can be expected to remove l30D, Q elements, etc., so the runoff load to public water bodies will be reduced. , compared to conventional methods in terms of water quality conservation.
I'm winning.

We have achieved practical effects such as:

An object of the present invention is to utilize natural energy as energy for evaporation as effectively as possible in the above-mentioned earlier application, thereby further increasing the economic effect.

The characteristic configuration of the sewage treatment water evaporation treatment apparatus according to the present invention, which was devised to achieve the above object, is that a network evaporation bed group installed in multiple stages above and below is connected to one of the vertically facing walls. The present invention is provided in a greenhouse made of a transparent material, in which an intake port is formed at a low point on a wall surface, and an exhaust port is formed at a high point on the other wall surface or at a roof surface close to it.

According to the apparatus of the present invention having such a characteristic configuration, the reticular evaporation bed group f: which forms a sufficiently wide evaporation surface in relation to the required floor area: natural draft and chimney due to temperature difference are installed in the installed greenhouse. The effect constantly generates strong outside air ventilation, making it possible to make the most effective use of this outside air ventilation and natural energy such as solar heat. Lifting pump operation cost (electricity bill) for sewage treatment water stored in
Efficient evaporation processing can be carried out with a high overall economic effect even under uncertain weather conditions.

Embodiment f of the present invention: Detailed description will be given below based on the drawings. In FIGS. 1 and 2, (1) is a storage of treated sewage water that has been treated by, for example, an activated sludge method in a sewage treatment facility. FTL is constructed by burying a concrete shell in a pit and underground.

(2) is a group of net-like evaporation beds that is almost roof-shaped when viewed from the front, and is installed in multiple stages vertically at appropriate intervals of 1 cm through a large number of supports (6), and is made of steel net or It was constructed from the Jugetsuji net, and the amount of processing, land area,
The number of stages to be installed will be determined depending on weather conditions, etc. (3) is before if:! This is a device that sprinkles water downward from the top of the reticulated evaporation bed (2) group, and this is a device that sprinkles water downward from the top of the reticulated evaporation bed (2) group at each stage. (2) Sprinkle pipes (8A) arranged along the top, pumps (8B) and vertical pipes (8C) for distributing the sewage treated water under full pressure in +11 for each of these water pipes (8A). It consists of (4) is a sand bed buried in the ground at a location directly below the network evaporation bed group (2), and is constructed by filtering unevaporated residual sewage;
Residual BODJ in the live water? The function is to separate biological sludge in the reticulated evaporation bed (2) caused by SS, and to separate dust, etc. in the frozen atmosphere, thereby preventing nozzle clogging of the water sprinkler (3). In addition to achieving this, slowing down the filtration speed will reduce residual +30D and nitrogen, etc.3]
It is also possible to perform ll. Additionally, a water-impermeable sheet (5) such as a polyethylene sheet is laid at the bottom of the sand bed (4) to prevent sewage from penetrating into the soil. Further, the water-impermeable sheet (6) has a gentle slope, and is configured so that wastewater can smoothly flow back from the +4+ -t++n surface of the sand bed to the pips).

In the sewage treatment water evaporation treatment apparatus having each of the above-mentioned it,
Transparent materials such as gold, a combination of a frame and a plastic plate or glass plate! ] 'W's greenhouse (7) is housed and installed, nIJ
There is a glass-shaped air inlet (8
A) A t' shadow is formed, and a louver-like exhaust port (8A') is formed at a high place on the other wall (7 holes).

In a place where the site is sloped, the ventilation effect can be further promoted by using the air inlet (8A) side located at the lower side of the slope.

Furthermore, the exhaust ports (eight vents) may be formed to protrude upward from the roof surface (7B) of the greenhouse (7) in the shape of a chimney as shown by the imaginary lines in FIG.

Each of the figures in FIGS. 8 to 6 shows the reticulated evaporation bed (2).
A modification of the group is shown in Fig. 8, which shows a flat reticulated evaporation bed (2
), and Figure 4 shows an inverted roof type mesh evaporation bed (2
), Figure 5 shows a combination of a roof type and an inverted roof type, and Figure 5 uses a flat type with a slope!
! ii! It was bribed.

[Brief explanation of the drawing]

1 is an overall schematic side view, FIG. 2 is a longitudinal sectional front view taken along the line II in FIG. 1, and FIGS. 8 to 6 are front views of main parts showing different embodiments.

Claims (1)

[Claims] ■ A bit tl+ for storing treated sewage water, a group of reticular evaporation beds (2) installed in multiple stages above and below, and the pit (1).
A device (3) that pumps the sewage treated water in the reticulated evaporation bed to the upper part of the group 21 and sprinkles water downward; 4) is a sewage treatment water heat of vaporization 32 I! device, in which the reticular evaporation bed (2) group is connected to one of the opposing walls (7A) and (78'). (7 people) An intake port (8A) is formed at a low place, and the other wall surface (
1; lr on the roof surface (7B) at or near the high point of 7A
Greenhouse made of transparent material (7) with air holes (8A') formed
An evaporation treatment device for sewage treated water, characterized in that it is installed inside the sewage treatment water. ■ The sand bed (4) has an impermeable sheet (6) at its bottom.
The sewage treatment water evaporation treatment apparatus according to claim 0, which is constructed by installing a sewage treatment water.