JPH02174988A - water purification equipment - Google Patents

Abstract

PURPOSE:To easily remove the suspended matter accumulated on filter media so that secondary chemical pollution is prevented and carcinogens are decomposed away by bringing ozone into contact with the treated water passing a sterilizing lamp housing tank to flocculate the particles of the suspended matter in the water, then adsorbing the suspended matter flocculated after passing the filter media in a filter medium housing tank by the filter media. CONSTITUTION:The ozone generated from the sterilizing lamp 2 or the ozone sent from a noiseless discharge type ozonizer comes into contact with the treated water passing the sterilizing lamp housing tank 1 to flocculate the particles of the suspended matter in the water. The pathogenic bacteria in the water are sterilized and the org. matter is photooxidation-decomposed, by which COD, BOD and odorous components are decreased. The treated water thereafter passes the filter media 8 of the filter medium housing tank 6 where the flocculated and suspended matter is adsorbed by the filter media 8. The filter media 8 is suspended in the water in the filter medium housing tank 6 and is agitated in the case of back washing the filter media 8. The dust, etc., sticking to the filter media are thereby separated and easily removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvement of a water purification device for purifying the water quality of lakes, drinking water, or wastewater from factories, homes, etc.

[Problems to be solved by conventional technology and inventions] (1) In the case of lakes and marshes Recently, in order to improve the scenery of ponds in parks, for example, the water quality of the ponds has been purified to increase the transparency of the water. Efforts are being made to make it easier to admire the carp, goldfish, etc. that are released into the river.

Conventionally, water purification methods include installing a filtration tank made of sand or honeycomb inside the device to remove suspended matter, using algaecides such as chlorine or copper, or purifying the water. A method is used in which a flocculant is placed inside to flocculate suspended matter in the water.

However, there is sand and honey inside the device! According to the method of installing a filtration tank consisting of one shade and removing floating matter, floating matter accumulates in sand, sandpaper, etc., easily clogging, reducing the ability to absorb floating matter, and making cleaning more troublesome. It takes.

In particular, it is well known that filamentous algae cannot be easily treated by filters, and in summer, in water purification plants that use Kasumigaura, Lake Biwa, etc. as water sources, filters immediately become clogged, forcing a decline in the quality of the treatment. .

Furthermore, according to the method of adding algaecides or flocculants such as chlorine or copper into the water, it is possible to remove algae such as blue-green algae and flocculate floating matter, but there are many algaecides and flocculants. In such cases, carp, goldfish, etc. in the water may die, and these chemicals may cause secondary contamination of water quality.

(2) In the case of sewage treatment from factories and homes, etc. To treat wastewater from factories and homes, generally, after physically treating the wastewater at a sewage treatment plant, chlorine is added to sterilize it and the treated water is released. things are being done.

However, this method has the disadvantage that aquatic plants (prize fish) die due to the effects of chlorine, and it cannot be used in park ponds where secondary water is desired, limiting its range of use.

(3) In the case of drinking water Water from lakes and reservoirs is subject to precipitation and 'd1. After that, it is disinfected with chlorine and used as tap water, but recently, wastewater from nearby factories and residences, or water containing fertilizer from agricultural fields has entered lakes and reservoirs, leading to eutrophication and the formation of blue-green algae in the water. The abnormal breeding of algae and green algae, and the chemicals secreted by these algae (such as borneol) give tap water an abnormal musty odor.

Conventional methods for preventing this have included disinfection with large amounts of chlorine and adsorption with activated carbon.

However, the use of chlorine has the disadvantage that the chlorine reacts with humic substances contained in newly fallen leaves and decaying plants, producing carcinogenic substances (such as trihalomethanes).

Furthermore, although activated carbon has high adsorption properties, it has the disadvantage that a large amount of equipment is required to reuse activated carbon, and the installation m''t+ becomes high.

[Purpose of the invention]

The present invention was invented in view of the above points, and it is possible to easily remove floating matter accumulated in the filter medium, and there is no risk of death of carp, goldfish, etc. due to chemical damage, and there is no possibility of secondary contamination. It is an object of the present invention to provide a water purification device that does not generate soot and can further decompose and remove carcinogenic substances.

[Means to solve the problem]

In order to solve the above problems, the present invention has the following configuration. That is, the germicidal lamp and the stirring device are stored in the germicidal lamp storage tank.

In addition, when water is being purified inside the filter media storage tank, air flows southeast to the bottom of the filter media storage tank, and for backwashing, for example, air is kept inside the filter media storage tank. When flowing water, atom, etc. are injected, the weight of the filter material that floats in the water inside the filter material storage tank is stored.

Then, ozone comes into contact with the treated water passing through the germicidal lamp storage tank and aggregates suspended particles in the water, and then passes through the filter medium of the filter medium storage tank, where the aggregated suspended substances are adsorbed by the filter medium.

In addition, ozone is collected from germicidal lamps,
Either a method of injecting the solution into a sterilizing lamp storage tank or a method of using a solution sent from a silent discharge ozonizer may be used.

[Effect]

According to the water purification apparatus described above, ozone generated from the germicidal lamp or ozone sent from the silent discharge ozonizer comes into contact with the treated water passing through the germicidal lamp storage tank, and aggregates suspended particles in the water. The post-treated water passes through a filter medium in a filter medium storage tank, and suspended matter containing Ig is adsorbed by the filter medium.

In addition, in the germicidal lamp storage tank, ultraviolet rays from the lamp are irradiated into the water, and ozone generated from the lamp is released into the water in the form of fine bubbles by a stirring device, which eliminates pathogenic bacteria in the water (for example).

It sterilizes Escherichia coli), photooxidizes organic matter, and reduces COD and B.
A reduction in OD and odor components can be achieved.

Also, when backwashing the filter media, air,
When flowing water, oxygen, etc. are injected, the filter medium is suspended in the water inside the filter medium storage tank and agitated, and dust etc. adhering to the filter medium is separated and can be easily removed.

In addition, in this device, activated water with a high redox potential (○RP) that has been treated with ultraviolet rays and ozone is sent to the filter media storage tank, so it is difficult to form an anaerobic film on the filter media, and the formed dust The membrane is easy to peel and is easily cleaned.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 3. In the figure, 1 is a germicidal lamp storage tank.

Reference numeral 2 denotes a germicidal lamp installed inside the germicidal lamp storage tank 1, which is constructed by storing twelve 65-watt germicidal lamps. The germicidal lamp 2 is housed in a jacket 3 made of quartz glass. Reference numeral 4 denotes a stirrer supported by the germicidal lamp storage tank 1, and is configured so that rotary blades 5 rotate in water. Further, ozone sent from the germicidal lamp 2 is collected, and is injected into the water through the stirrer 4 and stirred. Alternatively, ozone may be generated by a silent discharge ozonizer and sent into the water. When ozone comes into contact with suspended matter in water, the suspended matter coagulates.

Reference numeral 6 denotes a filter medium storage tank, 7 a net body attached near the inner bottom of the filter medium storage tank 6, and 8 a filter medium housed on the upper surface of the net body 7. Bundle them together to have a diameter of about 30 mm, for example 40 cm to 50 cm.
It is constructed by laminating layers with a certain thickness. In addition, when the filter medium 8 is purifying water, it is densely packed at the bottom of the filter medium storage tank 6, and during backwashing, the inside of the filter medium storage tank 6 is filled with air, freshly flowing water, When oxygen or the like is injected, 71% of the weight is released into the water inside the filter medium storage tank 6.

Reference numeral 9 is an air pipe for sending air, etc. into the inside of the filter medium storage tank 6, and 10 is an overflow, which is configured to be drained when the treated water exceeds a predetermined amount.

A water level sensor 11 detects the water level inside the filter medium storage tank 6.

12 is an air vent tube during backwashing, and air pipe 9
Pressurized air from is exhausted. 13 is a water supply pipe during backwashing, and 14 is a treated water outlet of the filter medium storage tank 6. Reference numeral 15 denotes a circulation pump, which is configured to send water from a pond or the like into the water purification device.

Next, an experimental example will be explained.

[Experiment example]]

Using the water purification device described above, pond water was circulated at 2.8 revolutions/day in a 50 rri' pond in which carp were raised as ornamental fish. As a result, the water quality was purified as shown in Table 1.

Table 1 Effect The treatment effect is clear from Table 1. - The pressure loss in the power source filter was as shown in Table 2, and there was no blockage; rather, the pressure loss decreased as the SS concentration in the pond decreased. .

However, in addition to reducing pressure drop, as shown in Table 2,
During backwashing, trapped SS can be easily removed, and residual S in the filter medium can be removed.
An effect can also be seen in reducing S (increasing cleaning efficiency).

Table 2 In other words, as can be seen from Table 1, the amount of SS (4 hanging objects) gradually decreased and the visibility gradually increased.

The shadow of the fish, which was initially invisible in the pond due to suspended matter, became clearly visible three days later.

It can also be seen that COD (Chemical Oxygen Demand) decreased and organic matter in the water decreased.

Further, ○RP (degree of water activation) increases, indicating that water activation is gradually progressing.

Final Wash Water SS Concentration (■/Q,) [Experimental Example 2] Next, experimental results regarding changes in the amount of fish disease contained in water will be explained.

[Experimental Example 3] Next, an explanation will be given according to Table 4 of the experimental results using secondary treated water obtained from sewage treatment in factories, homes, etc. as raw water.

Table 4 As is clear from Table 3, Vibrio bacteria and Aeromonas 4 bacteria gradually become O on the 4th day of the month.

Note that the experimental results were the same as the conditions shown in Table 1.

The values for treated water in Table 4 are after one pass through the water purification device described above.

According to the same table, it can be seen that by removing SS, BOD and COD caused by SS components are reduced, and water quality is improved.

Also due to the ultraviolet rays and ozone generated by the lamp.

E. m bacteria becomes 0 for one-pass treatment, and BOD.

Since COD is reduced with treatment, trihalomethane, which is a source of carcinogens, is not produced, and the range of applications for treated water is expanded.

The experiments shown in Table 4 were conducted using the apparatus shown in the above examples.

〔Effect of the invention〕

As described above, in the present invention, ozone comes into contact with the treated water passing through the sterilization lamp storage layer and aggregates suspended particles in the water. Floating substances can be effectively adsorbed and removed by the filter material.

In addition, the ultraviolet rays and ozone generated by the germicidal lamp can sterilize pathogenic bacteria in the water and decompose and remove organic matter that is a source of five carcinogens, and there is no risk of secondary contamination.

Furthermore, when air, flowing water, oxygen, etc. are injected from the bottom of the filter media storage tank during backwashing, the filter media will be suspended in the water inside the filter media storage tank and stirred, and the dust etc. attached to the filter media will be separated. At the same time, the treated water is activated by ultraviolet rays and ozone, and the anaerobic dust film attached to the filter material is easily peeled off and treated, which improves the quality of lake water, drinking water, factories, homes, etc. It has great utility as a device for purifying wastewater.

[Brief explanation of the drawing]

FIG. 1 is a side view of the water purification apparatus according to the present invention, FIG. 2 is a perspective view of the main part of FIG. 1, and FIG. 3 is a diagram showing pressure loss. 1... Germicidal lamp storage layer 2... Germicidal lamp 4... Stirrer 6... Filter medium storage tank 8... Filter medium Fig. 1 Fig. 3

Claims (1)

[Claims] 1. When a sterilizing lamp and a stirring device are stored in a sterilizing lamp storage tank, and water is being purified inside the filter media storage tank, the sterilizing lamp and stirring device are packed together at the bottom of the filter media storage tank, and During backwashing, the weight of filter media floating in the water inside the filter media storage tank is stored, and ozone comes into contact with the treated water that passes through the germicidal lamp storage layer, coagulates suspended particles in the water, and then the treated water is A water purification device characterized in that the water purification device is configured to pass through a filter medium in a filter medium storage tank, adsorb and treat aggregated suspended matter with the filter medium.