JPH10328510A - Waste water treating/regenerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a device to perform waste water treatment while regenerating and reusing the waste water and a filter medium. SOLUTION: This waste water treating/regenerating device is constituted of a filter consisting of a body upper part 1 and a body lower part 2. In the body upper part 1, a funnel part 3 provided with a guide blade 4 is arranged, in the funnel part 3, a contaminated water discharge port/backwashing soiled water discharge port 5 is opened and is made to communicate with a contaminated water introducing pipe/back washing soiled water discharge pipe 6, and also between this pipe 6 and the funnel part 3, a baffle plate for solid-liquid separation is arranged. Into the body lower part 2, a filter medium F is filled and in the bottom part thereof, a backwashing introducing port 15 and a regenerated water take-out port are opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment / regeneration system, and more particularly, to a treatment / treatment system for freshwater and / or seawater wastewater using a filtration device and regenerating the filter medium itself. Reproduction system.

[0002]

2. Description of the Related Art Wastewater treatment is an important technical issue in recent years when environmental pollution is emphasized. In the food industry, wastewater containing a large amount of polysaccharides and proteins is produced from various food production / treatment plants. Emissions and their disposal is a serious problem.

At present, most of wastewater treatment facilities actually operated in food production / treatment plants are based on a biological filtration method (biological treatment method) using activated sludge or the like. However, this method requires a large installation space,
The disadvantages of being expensive, high maintenance costs, and struggling with dust treatment are inevitable.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to newly develop an efficient wastewater treatment system which does not have the above-mentioned drawbacks and which can be widely applied to various kinds of wastewater. .

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and as a result of examination from various aspects, has focused on a system utilizing a filtering device using a filter medium. The invention has been completed. Hereinafter, the present invention will be described in detail using seawater stored as laver as a representative example of contaminated water (wastewater).

[0006] The harvested seaweed algae is stored while immersed in seawater or sprayed with seawater to maintain freshness. The stored seawater is composed of small pieces of seaweed, waste products released from seaweed, and attached bacteria. Polluted by the increase of Therefore, the stored seawater cannot be released as it is,
It is necessary to treat and purify, but at this time, in addition to removing pollutants, it is necessary to consider salt damage caused by seawater.

At the same time, it would be very advantageous if the stored seawater could not only be purified but also regenerated as seawater and valuable seawater could be reused, and as the frequency of use increases, the capacity of the filter media decreases. However, it would be even more advantageous if a system that could regenerate the filter media without having to separate and wash or replace the filter media would be more convenient and would allow very efficient wastewater treatment. The present invention has succeeded in resolving these technical problems or the demands in the industry at once, and is a truly comprehensive system for wastewater treatment / regeneration.

FIG. 1 shows a filtration device according to the present invention.
(Partly cutaway). The present filtration device mainly includes a main body upper portion 1 and a main body lower portion 2. In the upper part 1 of the main body, a funnel 3 is arranged at the center thereof, and one or more guide wings 4 are provided in the funnel 3. Further, in the funnel, a contaminated water discharge port (also serving as a backwashing dirt water discharge port) 5 is opened to open a contaminated water introduction pipe (also serving as a backwashing dirt water discharge pipe) 6.
To communicate with The pipe 6 goes out of the main body,
It branches into a contaminated water introduction port 7 and a backwash dirt water discharge port 8.

Reference numeral 9 denotes a solenoid valve provided on the backwash dirt water discharge port 8 side, which can be opened at the time of backwash.
Reference numeral 0 denotes a check valve provided on the contaminated water introduction port 7 side. Note that 11
Represents an automatic air vent valve, and 12 represents an air intake at the time of drainage.

FIG. 2 shows a cross-sectional view of the filtration device according to the present invention. FIG. 2 shows the positional relationship between the upper part 1 and the lower part 2 of the main body, and a baffle plate 13 is arranged between the funnel 3 and the wastewater discharge port / backwashing dirty water discharge port 5 and the pipe 6. Set up. The baffle plate 13 separates the filter medium and the contaminant-containing backwash water at the time of backwashing the filter medium (described later), and lowers the filter medium to the lower part 2 of the main body. And the function of introducing. The baffle 13 is a triangle to a polygon.
Any of a cylindrical shape may be used, and the present embodiment employs a cylindrical shape.

On the other hand, a filter medium F is stored in the lower part 2 of the main body, and an opening is provided in a lower part (preferably a bottom part) of the filter medium F so as to communicate with the regenerated water extraction pipe 14 and the backwash water introduction pipe 15. One or more of these tubes may be separately attached to the lower portion 2 of the main body, or both tubes may be attached concentrically as shown (FIG. 2). The size of the opening is made smaller than the size of the filter medium F, a slit is formed as shown in FIG. Or a grid or the like may be provided.

The backwash water introduction pipe 15 is connected to a backwash water intake pipe 17 via a backwash pump 16. Reference numeral 18 denotes a bubble generator provided in the backwash water introduction pipe 15, and 19 denotes a bubble air inlet. On the other hand, the solenoid valve 2
0 is provided.

Examples of the filter medium F include inorganic filter medium such as sand, silica sand, diatomaceous earth, clay mineral (acid clay, bentonite, etc.), porous glass, ceramics, etc., synthetic resin filter medium such as polystyrene beads, and activated carbon. And one or more kinds of organic filter media such as alginic acid (sodium) can be used.

In order to treat contaminated water (wastewater: for example, stored seawater) using this filtration device, first, the filtration operation may be performed as follows. The contaminated water sent from the contaminated water pump (FIG. 3) passes from the contaminated water introduction port 7 through the check valve 10, passes through the contaminated water introduction pipe 6, and is discharged from the contaminated water discharge port 5 to the funnel 3. It moves downward and moves from the slit to the lower part 2 of the main body.

The contaminated water is sufficiently purified by contact with the filter medium in the lower part 2 of the main body. Since the obtained reclaimed water is purified seawater (or fresh water), it can be reused (in the case of fresh water, if it is unnecessary, it can be discharged as it is). ). In this manner, since seawater can be regenerated, there is no occurrence of salt damage by discharging dirty seawater as it is, and according to the present invention, valuable seawater can be reused, and cost and factory equipment can be reduced. A great effect is also achieved from the aspect of pollution control and pollution control. Of course, in the case of fresh water, it may be reused. Since the wastewater is sufficiently treated, it can be discharged.

Next, the regeneration operation of the filter medium is performed as follows. The backwash water is turned into fine bubbles from the bottom of the filter medium F by the backwash pump 16 through the bubble generator 18 (and, if necessary, the slit 21 provided at (the top of) the backwash water introduction pipe 15). Gushing. By the jet (bubbling) of the fine bubbles, the contaminants and the like adhered, adsorbed or adhered to the filter medium F are separated.

The backwash water (backwash soil water) mixed with the cleaned filter medium F and the detached contaminants floats while turbulently moving with bubbles, and swirls with the guide vanes 4 to draw a vortex ( Swirling flow). The guide wing 4 may be fixed or movable, and its direction, orientation, installation location, and number of installation may be appropriately changed.

Due to this swirling flow, the heavy filter medium sinks, while the contaminants and the backwash water (backwash soil water) pass through the backwash soil water discharge port 5 through the open solenoid valve 9 and backwash. The water is discharged from the dirty water discharge port 8 to a sedimentation tank or the like. Separation of the filter medium from the backwash soil water is further promoted by the baffle plate 13. That is, the filter medium and the backwashing dirt are mixed together to form a mixture.
And collide with the baffle plate 13, and the filter medium
It descends to the lower part 2 of the main body from the slit between 3 and the funnel part 3. On the other hand, the backwash soil water from which the filter medium has been separated is discharged from the backwash soil water outlet 5 as described above. The air floating on the upper part and separated at the liquid level is supplied to the automatic air release valve 11.
From the body.

In this way, it is possible to remove the filter medium from the main body and clean and regenerate the filter medium, or to replace the filter medium with a new one and clean and regenerate the filter medium simply by backwashing the filter medium while filling the filter medium. it can. Moreover, there is no run-off of the filter medium due to strong washing and back washing, and this point is one of the features of the present invention in terms of economy.

The sewage discharged from the backwash sewage discharge port 5 no longer contains salt enough to cause salt damage. Therefore, the wastewater is usually treated by a wastewater treatment technique such as treatment in a settling tank or biological treatment. It can be sufficiently treated and discharged into rivers and the like.

A system for regenerating seaweed stored in nori original algae using the filtration device according to the present invention will be described below with reference to FIG. The collected nori original algae are stored in the original algae storage tank while being immersed in seawater or sprayed with seawater, and the original algae are transferred to the next step by a transfer pump as necessary.

On the other hand, the stored seawater is polluted due to an increase in small pieces of laver, waste products and adherent bacteria released from the laver. The stored seawater is transferred from the raw algae storage tank to the contaminated water tank, and if necessary, a flocculant is charged from a flocculant charging device and preliminarily clarified, and then transferred to a seawater filtration device by a sewage pump. In the seawater filtration device, contaminated water is treated and regenerated as described above.

The regenerated seawater may be passed through an activated carbon filter, if necessary, stored in a seawater tank and used when necessary, or may be directly sent to a raw algae storage tank. In this embodiment (FIG. 3), an empty contaminated water tank is used as the seawater tank, but another tank may be used.

Next, backwash water is pumped up from a backwash water well using a backwash pump, and spouted into the main body to regenerate the filter medium as described above. The backwash soil water by-produced at that time is sent to a sedimentation tank, subjected to wastewater treatment according to a conventional method, and discharged.

By adopting this system, seaweed original algae can be kept fresh and fresh, fishermen can reduce the transportation work to replace severe seawater by 1/10, troubles with surrounding farmers and surrounding residents due to salt damage and environmental pollution. You are also free from problems.
Also, the filter media can be recycled and reused, and there is no need to replace them.

[0026]

According to the present invention, waste water can be efficiently treated, and the treated water obtained by the treatment can not only be discharged as it is, but also can be reused because it has been regenerated to the original water. . In addition, the filter medium can be recycled and reused, so that these can be recycled and recycled, and the present invention is excellent in terms of economy and pollution prevention.

The present invention can be used not only as a purification system for seawater stored in a laver manufacturing plant, but also for removing blue-green algae in lakes and marshes and for treating wastewater in processing plants for marine products and seafood.

[Brief description of the drawings]

FIG. 1 shows a filtration device according to the present invention.

FIG. 2 shows a partial sectional view of the same.

FIG. 3 shows a system for regenerating seawater stored in nori original algae.

Claims (4)

[Claims] 1. A filtering device comprising an upper body and a lower body; a funnel provided with guide wings is provided in the upper body, and a contaminated water discharge port / backwashing dirty water is provided in the funnel. An outlet is opened to communicate with the contaminated water introduction pipe / backwashing dirt water discharge pipe, and a baffle for solid-liquid separation is arranged between the pipe and the funnel;
Filling the filter medium with a backwash water inlet and a reclaimed water outlet at the bottom;
Playback device. 2. The apparatus according to claim 1, wherein the backwash dirty water discharge pipe and the backwash water introduction pipe are closed, and the contaminated water is introduced from the contaminated water introduction pipe and discharged from the contaminated water discharge port. Purifying the contaminated water by contacting it with the filter material filled in the lower part, and using and / or discharging the obtained purified water as reclaimed water; and closing the contaminated water introduction pipe and the reclaimed water extraction pipe, and backwashing water introduction pipe Introduce backwash water from, and if necessary, introduce air bubbles to squirt from the bottom of the filter medium to release contaminants collected in the filter medium, float up while turbulent, and separate the filter medium at the top of the main body The backwash water containing pollutants separated from the filter medium is discharged to the outside through the backwash dirty water discharge pipe through the backwash dirty water discharge pipe, and the filter medium is regenerated. Wastewater treatment / regeneration Law. 3. The apparatus or method according to claim 1, wherein the wastewater is freshwater wastewater and / or seawater wastewater. 4. The apparatus or method according to claim 3, wherein the wastewater is seawater stored in nori original algae.