KR20190118998A - Water treatment method for eating water production - Google Patents

Abstract

The present invention provides a water treatment method capable of reducing water treatment facilities and occupied space by significantly simplifying a water (mineral water)-producing process by water treatment using plasma and nanobubbles, having excellent utility and cost effectiveness by significantly reducing treatment time, improving water quality without using chemicals, removing odor and non-degradable contaminants, having excellent efficiency for sterilization of various harmful bacteria, heavy metals, pathogenic microorganisms, and the like, and producing high functional drinking water containing hydrogen (oxygen) by inputting hydrogen (oxygen) into nanobubbles. The water treatment method comprises the following steps of: filtering impurities from water to be treated of a water collecting well through a sand filter; circulating the water to be treated, which is transferred to a main treatment tank, through a plasma reactor, oxidizing, precipitating, and sterilizing contaminants by a plasma reaction; passing the water to be treated, which is treated in the main treatment tank, through a functional filter to adjust a PH concentration, removing residual fine materials, and sending the water to be treated to an advanced treatment tank having a nanobubble generator; generating nanobubbles using the nanobubble generator in the advanced treatment tank to oxidize and decompose organic matters from the water to be treated; supplying hydrogen (oxygen) to the water to be treated, which is treated with the nanobubbles, with a hydrogen (oxygen) input device, and inputting hydrogen (oxygen) into the nanobubbles to produce drinking water; and bottle the produced drinking water.

Description

WATER TREATMENT METHOD FOR EATING WATER PRODUCTION

Embodiment of the present invention relates to a water treatment method for the production of drinking water, and more particularly, to simplify the water treatment process to shorten the water treatment time and lower the cost of the facility, as well as the removal of odor and efficient removal of various harmful bacteria or heavy metals, as well as The present invention relates to a water treatment method capable of producing highly functional drinking water containing hydrogen or oxygen.

Most of Korea relies on surface water such as rivers, lakes, etc., and water pollution to water is a serious national problem. Recently, due to climatic abnormalities and droughts, water quality has deteriorated to grade 4 ~ 5 water. It is to the state that it is hard to use in water supply.

In order to improve this water source, pre-chlorination treatment or pre-ozonation treatment is currently performed, but in the former case, trihalomethane (THMs), which is a carcinogen, is generated, and in the latter case, ammonia is used. It is a situation where basic measures are not taken, such as the removal of nitrogen (NH4 -N).

The water treatment system provided so far is mainly used for physicochemical processes such as flocculation, sedimentation, sand filtration, disinfection, etc., but there have been environmental problems due to the use of chemicals. Problems have arisen that are not removed, increase pipe scaling and cause water degradation, and in recent years there has been concern that chlorine used in the disinfection process can combine with organic matter in the water to produce carcinogenic substances. Membrane separation processes are widely used.

Membrane separation process is a technology that removes contaminants by using a membrane having micropores that can separate materials of a specific size. The membrane is a microfiltration (MF) membrane, an ultrafiltration membrane (UF) membrane, or a nanoparticle. It is divided into filtration (NF) membrane and reverse osmosis (RO) membrane, and the membrane separation process has the advantage that the treatment water quality is stable and the automation is easy, and the maintenance is easy, but the cost is too high in large water treatment systems. As a result, at present, most of small household water purifiers are mainly used as membrane separation filters.

Korea is also trying to apply the membrane separation process to small facilities in part, and since July 2009, it is preparing to apply the membrane separation process to large-capacity facilities with a daily treatment capacity of more than 5000 tons. The company plans to pilot a 25,000-ton membrane separation advanced water treatment project, but the question is how good the quality of water sent to the membrane separation process can be.

It is a process that removes suspended substances and degradable organic substances generated in general water treatment process, and is usually treated by combining physicochemical process and biological process. Advanced treatment removes hardly decomposable organic substances, nutrients (nitrogen, phosphorus) and heavy metals. As a biological treatment method is used as the process, a biological membrane separation method combining a biological treatment method and a membrane separation method may be proposed as a preferable alternative.

In addition, until now, to obtain a water source, the secondary water of the upper water purification plant or reservoir is purged to purify and remove suspended solids, and then a flocculant is administered to form a floc when foreign particles in the water meet the flocculant to form a floc. After sterilization using fluorine and chlorine through the following filter, the system was sent to each household. However, if the water shortage became serious, the water of third and fourth grade water may be purified and consumed. We are in charge of the times when we must prepare for the worst situations that require water to be used as a source of drinking water.

In recent years, the use of water supply in villages has been largely unused as a source of drinking water due to a large excess of nitrate nitrogen, which is an analysis of the impact of wastewater from livestock farms. As a result, the pollution of heavy metals is high, and the pollution of fluorine or pesticides is high due to the use of pesticides in farms in general fields. In order to solve this problem, Korean Patent Laid-Open Publication No. 10-2009-0058309 discloses a lack of water. A comprehensive water treatment method and apparatus thereof have been known.

Referring to FIG. 1, a water treatment method for producing drinking water (bottled water) using conventional groundwater, river water, and tap water as treated water will be described below.

First, the treated water is led to the intake well and stored in the raw water storage tank (S1, S2). Subsequently, the treated water stored in the raw water reservoir is passed through various filtering devices such as sand filtration (S3a), activated carbon filtration (S3b), primary filter filtration (S4a), and secondary filter filtration (S4b) to remove various impurities and foreign substances. Primary purification.

At this time, sand filtration (S3a) is a pretreatment process using a sediment filter to filter out fine impurities such as soil, sand, dust, activated carbon filtration (S3b) is a process using the carbon adsorption properties of the pre-carbon filter organic compounds, odor, Filter the goats. In addition, the primary filter filtration S4a and the secondary filter filtration S4b are filtration processes using reverse osmosis (RO) and hollow fiber membrane system (UF).

Subsequently, harmful germs contained in the treated water are removed through ultraviolet sterilization with respect to the primary purified treated water (S5) and stored in the product water storage tank (S6).

Subsequently, a third filter filtration (S7a), a fourth filter filtration (S7b), and an ultraviolet sterilization (S8) treatment are performed on the treated water stored in the product water storage tank to perform second purification and bottling (S9). After that, the process is made to ship the product.

The third filter filtration (S7a) at the time of the second purification suppresses the bacteria propagation of purified water by the filtration process using a post carbon filter, removes odor taste, pigment, etc., and the fourth filter filtration (S7b) is a functional filter Process to improve the taste of water or adjust the acid (ph) concentration to about alkaline 7 ~ 8.

However, the conventional water treatment method for producing drinking water (bottled water) is a multi-stage treatment process in which various filtration processes and ultraviolet sterilization processes are complicated, so that the water treatment equipment is large, occupies a lot of occupied space, and the treatment time is long, high cost and low efficiency There is a disadvantage. In addition, the removal efficiency of heavy metals contained in a lot of groundwater or rainwater is low, the situation is in urgent need for improvement.

The present invention is to solve the conventional problems as described above, its purpose is to greatly simplify the water production process by the water treatment using plasma and nanobubbles can reduce the water treatment equipment and reduce the occupied space, of course, It is to provide a water treatment method for producing drinking water which is very cost effective by greatly reducing the treatment time.

Another object of the present invention is to improve the water quality without using any chemicals, and to remove odors and hardly degradable contaminants, as well as efficient sterilization and sterilization of various harmful bacteria, heavy metals, pathogenic microorganisms, etc. It is to provide a water treatment method capable of producing high-functional drinking water containing active gas by adding hydrogen or oxygen.

In order to achieve the above object, the present invention comprises the steps of filtering the water drawn into the intake well through a sand filter to send the main treatment tank equipped with a plasma reactor; Circulating the treated water sent to the main treatment tank through a plasma reactor to oxidize, precipitate, and sterilize contaminants by a plasma reaction; Passing the treated water treated in the main treatment tank through a functional filter to adjust the pH concentration, removing residual fine substances, and then sending the treated water to the advanced treatment tank equipped with a nanobubble generator; Generating nanobubbles with the nanobubble generator in the advanced treatment tank to oxidize and decompose the organic matter in the treated water; And watering the produced drinking water. Here, hydrogen (oxygen) refers to 'hydrogen or oxygen'.

In addition, in the present invention, the plasma reactor is an electrochemical oxidation (Electro Oxidation Technology) generating device generated by applying a high voltage plasma energy pulse directly to the treated water, oxidizing agents (OH, H, O necessary for the oxidation and sterilization of the treated water) , O ₃ , H ₂ O _2, etc.) and water treatment methods for the production of drinking water generating ultraviolet (UV) light.

In addition, in the present invention, the nanobubble generator of the advanced treatment tank is characterized by a water treatment method for producing drinking water to generate nanobubbles of less than 500nm.

In the present invention, after the step of the oxidation and decomposition treatment step of supplying hydrogen or oxygen to the nano-bubble treated water with hydrogen or oxygen injector and adding hydrogen or oxygen into the nanobubble to produce drinking water It may further include.

In the water treatment method for producing drinking water according to the present invention having the above-described configuration, a high-voltage energy pulse controlled by PLC (Power Line Communication) as the treated water is treated by a plasma reaction in a main treatment tank having a plasma reactor. Is delivered directly to contaminated water, and energy pulses produce several oxidants (OH, H, O, O ₃ and H ₂ O ₂ ) to decompose all heavy metals arsenic, calcium magnesium and contaminated organics in the treated water, Oxidation and precipitation, it produces a 60 ~ 300nm high-intensity ultraviolet light is effective to sterilize.

In addition, the present invention by promoting the nano-bubble of less than 500nm in a high-treatment tank equipped with a nanobubble generator to promote the redox effect on the plasma treated water, killing and flocculating organic pollutants, removal of residual nitrogen, phosphorus, hydroxyl ions It produces and sterilizes.

In addition, the present invention, by placing the hydrogen (oxygen) into the hydrogen (oxygen) injector into the nanobubble of less than 500nm generated in the treated water with the nanobubble generator, and prevents the hydrogen (oxygen) is evaporated for a long time It is a useful invention that can produce highly functional drinking water containing hydrogen (acid) in water.

1 is a block diagram showing a water treatment method for producing conventional drinking water.
Figure 2 is a block diagram showing a water treatment method for producing water according to an embodiment of the present invention.
Figure 3 is a block diagram showing a water treatment method for producing water according to another embodiment of the present invention.

BEST MODE Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating a water treatment method for producing drinking water according to an embodiment of the present invention.

As shown in Figure 2, the water treatment method for producing drinking water according to the present embodiment, 1 to filter out impurities from the treated water, such as groundwater, river water, tap water, etc. drawn to the water intake using a pump (10a), etc. Step (S10), two steps (S20) of performing a plasma reaction treatment in a main treatment tank having a plasma reactor, three steps (S30) of adjusting a pH concentration and a fine material through a functional filter; The advanced processing tank equipped with a nanobubble generator is composed of four steps (S40) for advanced processing using a nanobubble, and six steps (S60) for bottling drinking water. The five separate steps will be described as additional components in other embodiments below.

Water treatment method for the production of drinking water of the present embodiment is a water treatment apparatus for producing drinking water, including a pump (10a), a filtration device, a plasma reactor, a micro filter, an advanced treatment tank, a storage tank (hereinafter referred to simply as a water treatment device) It can be implemented by. The water treatment device may control at least some of the components to control the flow of fluid or to control the overall operation of the device. To this end, the water treatment device may include a computing device including a processor and a memory or a component for performing a function corresponding thereto.

Referring to the water treatment method for producing the above-described drinking water in more detail as follows. First step (S10) is the step of passing the treated water drawn into the water well through the sand filter to filter out impurities and to send to the main treatment tank equipped with a plasma reactor, sand filter is, for example, by using a quattro sand filter Fine impurities such as sand and dust can be filtered out of the treated water and purified first.

The second step (S20) is a step of circulating the treated water sent to the main treatment tank in the plasma reactor to oxidize, precipitate and sterilize the contaminants by the plasma reaction. Week treatment tank reactor is needed for the oxidation and disinfection of the treated water as the electrochemical oxidation (Electro Oxidation Technology) generator for generating added directly to the treated high-voltage plasma energy pulses _{OH, H, O, O 3} , H 2 O ₂ or the like generates a large amount of multi-oxidant (multi Oxidants) and ultraviolet (UV).

Therefore, by passing the treated water through a plasma reactor (Plasma Arc Flow (PAF) Reactor) that generates a plasma of high temperature (5,500 ℃), it is possible to produce a clean biogas by decomposing and recombining the contaminated organic and inorganic materials into the reactor. Almost all heavy metals such as arsenic, calcium, magnesium, lead and zinc, and arsenic, chemicals, poisons, oils and contaminated organics are oxidized, decomposed and precipitated, and nitrogen, phosphorus and hydrogen sulphate are decomposed. It can remove germs, viruses and bacteria with 60nm and 300nm high intensity ultraviolet rays.

In addition, if the treated water is a stream, the odor causes are H ₂ S and ammonia, which are multioxidants (OH, H, O, O ₃ and H ₂ O ₂ ) or ultraviolet light (UV) together with heavy metals and bacteria. Oxidation precipitation decomposes.

For example, H ₂ S burns with blue flames in oxygen to produce sulfur dioxide, and when oxygen is scarce, produces sulfur.

2H ₂ S + ₃ O ₂ → 2H ₂ O + 2SO ₂ , 2H ₂ S + O ₂ → 2H ₂ O + 2S

Subsequently, step 3 (S30) is to pass the treated water treated in the main treatment tank through the functional filter to adjust the acid (ph) concentration, remove the residual fine material, and send it to the advanced treatment tank equipped with a nanobubble generator, The ph concentration is adjusted to about alkaline 7-8.

Step 4 (S40) is a step of generating nanobubbles with a nanobubble generator in a high-treatment tank to oxidize and decompose organic matter in treated water. The nanobubble generator preferably generates nanobubbles of 500 nm or less. Nanobubble water can be produced by passing plasma treated water through a nanobubble generator injected with air.

Water treatment technology using nanobubble is a water treatment technology in which nano-level ultra-micro bubbles stay in water for a long time (more than 6 months) and increase dissolved oxygen to purify the water quality.It stays in water and the surface tension inside the bubble compresses the inside. It generates high temperature and high pressure. This self-pressurizing effect has a short half-life of one millionth of a second, and oxidizes and decomposes organic matter in water by causing a chain reaction of compression and rupture at a high temperature of 4,000 to 6,000 ° C.

Nanobubbles can sterilize and decompose contaminants, organic compounds and inorganic substances in treated water, inhibit and eliminate algal growth, inhibit the growth of harmful bacteria and virus bacteria, and improve microbial activity to increase biochemical oxygen demand. (BOD), chemical oxygen demand (COD), suspended solids (SS) significantly reduced, and decomposes and removes odors such as ammonia and hydrogen sulfide, and it does not generate secondary pollution and by-products. have.

In addition, nanobubble water treatment technology generates nanobubbles of less than 500 nm using only water and air, and continuously injects them into water to decompose residual condensation and suspended solids with hydroxide (OH) anions generated from nanobubbles, and cause odors and odors. The main culprit is to remove residual nitrogen, phosphorus and hydrogen sulfide, and to improve the water quality by the second sterilization action of Escherichia coli, various harmful bacteria and pathogenic microorganisms.

Step 6 (S60) is a step of bottling plasma and nanobubble-processed water containing oxygen (oxygen) through the process from the first step (S10) to the fourth step (S40), produced functional eating Water or bottled water can be commercialized and provided to consumers.

On the other hand, the bottled water produced in step 4 (S40) described above can be supplied directly to the consumer or the user through at least one distribution pipe connected to the discharge port of the advanced processing tank without being supplied to the storage tank.

3 is a block diagram illustrating a water treatment method for producing drinking water according to another embodiment of the present invention.

As shown in Figure 3, the water treatment method for producing drinking water according to the present embodiment, 1 to filter out impurities from the treated water, such as groundwater, river water, tap water, etc. drawn to the water intake using a pump (10a), etc. Step (S10), two steps (S20) of performing a plasma reaction treatment in a main treatment tank having a plasma reactor, three steps (S30) of adjusting a pH concentration and a fine material through a functional filter; In the high-treatment tank equipped with a nanobubble generator, step 4 (S40) for high-level processing using nanobubbles, and 5 for producing drinking water (bottled water) by adding hydrogen (oxygen) to the treated water in which the nanobubbles are generated. It consists of a step (S50), and six steps (S60) for bottled drinking water.

Water treatment method for the production of drinking water of the present invention is a water treatment apparatus for producing drinking water, including a pump (10a), a filtration device, a plasma reactor, a micro filter, an advanced treatment tank, a hydrogen generator, a storage tank, etc. (Called a device). The water treatment device may control at least some of the components to control the flow of fluid or to control the overall operation of the device. To this end, the water treatment device may include a computing device including a processor and a memory or a component for performing a function corresponding thereto.

Referring to the water treatment method for producing the above-described drinking water in more detail as follows. The water treatment method of the present embodiment includes steps 1 to 6, and steps 1 to 4 and 6 are omitted to avoid the description and duplication described above with reference to FIG. In the present embodiment, after step 4 or before step 6, step 5 (S50) by the hydrogen generator may be performed.

Step 5 (S50) is to supply hydrogen (oxygen) into the nanobubble by supplying hydrogen (oxygen) to the nanobubble treated water with a hydrogen (oxygen) injector, and into the nanobubble of 500 nm or less. By penetrating and confining hydrogen (oxygen) and preventing it from evaporating for a long time, it is possible to produce high-functional drinking water containing water (oxygen) in drinking water (bottle water).

According to the present embodiment, by applying a hydrogen generator or an oxygen generator to a relatively important and sensitive place for drinking water such as a hospital, it is possible to supply safer drinking water by additionally adding hydrogen or oxygen into the nanobubbles.

According to the above-described embodiment, the water treatment method of the present invention may be installed in pharmaceutical companies, food companies, beverage companies, cosmetic companies, fish farms, organic farming, hydroponics, hospital hotels and apartments, smart cities, etc. to produce drinking water or industrial water. .

The embodiments described so far are merely illustrative of the preferred embodiments of the present invention, and the scope of the present invention is not limited to the described embodiments, and those skilled in the art within the technical spirit and claims of the present invention. It will be understood that various changes, modifications, or substitutions may be made thereto, and such embodiments are to be understood as being within the scope of the invention.

Claims (1)

Sending the treated water drawn into the water well to a main treatment tank equipped with a plasma reactor after filtering out impurities through a sand filter;
Circulating the treated water sent to the main treatment tank through a plasma reactor to oxidize, precipitate, and sterilize contaminants by a plasma reaction;
Passing the treated water treated in the main treatment tank through a functional filter to adjust the acid concentration, removing residual fine substances, and then sending the treated water to a high treatment tank equipped with a nanobubble generator;
Generating nanobubbles with the nanobubble generator in the advanced treatment tank to oxidize and decompose the organic matter in the treated water; And
Supplying hydrogen or oxygen to the nanobubble treated water with hydrogen or oxygen injector and adding hydrogen or oxygen into the nanobubble to produce drinking water,
The plasma reactor directly applies a plasma energy pulse to the treated water to generate oxidants and ultraviolet rays necessary for the oxidation and sterilization of the treated water,
The nanobubble generator is characterized in that for generating nanobubbles of less than 500nm, water treatment method for the production of drinking water.

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