JP2014113561A - Water quality clarifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water quality clarifier in which a water quality of water in closed type water system equipment can be maintained for an extended period.SOLUTION: Provided is a clarifier that is used for closed type water system equipment that includes a hollow accommodation space in which water can be accommodated, and in which the accommodation space is substantially isolated from an outside. The clarifier includes: a granular porous inorganic member subject that has a function that adsorbs a dissolved material in water in a state in which water is accommodated in the accommodation space of the closed type water system equipment; and an enzyme, wherein the enzyme includes: a protein decomposition enzyme that has a function to decompose a protein; a fat decomposition enzyme that has a function to decompose a fat; and a starch decomposition enzyme that has a function to decompose a starch. A water quality of water in the closed type water system equipment can be maintained in a lucent state for an extended period by the interaction between the porous inorganic member subject and the enzyme. Herewith, a replacement work of water to maintain a water quality of water in the closed type water system equipment can be reduced.

Description

  The present invention relates to a water purification agent. More specifically, the present invention relates to a water purification agent used in closed water systems such as aquariums and ginger.

  Closed water systems such as aquariums and ginger that isolate the internal breeding area or aquaculture area from the outside (hereinafter simply referred to as closed water system facilities) It has been practiced to maintain the water quality by removing the food residue etc. with a sponge-like filter member or purifying with a water purification member a dissolved substance that cannot be treated with the filter member.

  As a method for removing this dissolved substance, for example, an inorganic purifier (for example, Patent Document 1) including an inorganic member having a function of adsorbing a substance dissolved in water or a function of a microorganism is used. Microbial cleaners (for example, Patent Document 2) exist.

  In Patent Document 1, the water of a closed water system is brought into contact with an inorganic purifier made of zeolite, magnesium aluminosilicate, silica, activated carbon, etc., and nitrous acid or ammonia dissolved in the water is adsorbed on the surface of the member. Thus, a technique for removing such a substance from water is disclosed.

  On the other hand, Patent Document 2 adsorbs hydrogen sulfide, ammonia, etc. dissolved in water to the ceramic or the like by bringing the water of the closed water system into contact with the ceramic while the microorganism is supported on the ceramic or the like. In addition, a technique for purifying water by decomposing hydrogen sulfide or the like into microorganisms and decomposing them into harmless inorganic substances is disclosed.

Japanese Patent Publication No.54-20440 JP-A-2005-144304

  However, even when the water purification agent of Patent Document 1 or 2 is adopted in a closed-type water system facility, water that is contaminated by excrement of fish and shellfish to be reared or cultivated or food leftover is completely removed. I can't. For this reason, in order to maintain the water quality in the chain-type water system equipment in a desired state (for example, a clear state), the water in the chain-type water system equipment is frequently exchanged (at least about one week to two weeks). There was a need to do.

  In view of the above circumstances, an object of the present invention is to provide a water purification agent capable of maintaining the quality of water in a closed water system facility for a long period of time.

A water purification agent according to a first aspect of the present invention is a purification agent used in a closed water system having a hollow storage space capable of storing water, the storage space being substantially isolated from the outside, wherein the closed type A granular porous inorganic member having a function of adsorbing dissolved substances in water in a state where water is stored in a storage space of an aqueous facility, and an enzyme, wherein the enzyme has a function of decomposing protein It contains a degrading enzyme, a lipolytic enzyme having a function of decomposing fat, and a amylolytic enzyme having a function of decomposing starch.
The water purification agent of the second invention is characterized in that, in the first invention, the enzyme contains a phytic acid decomposing enzyme having a function of decomposing phytic acid.
In the water purification agent of the third invention, in the first or second invention, the content of the enzyme is 0.3 to 1.5 parts by volume with respect to 100 parts by volume of the granular porous inorganic member. It is characterized by being blended in.
A water purification agent of a fourth invention is the acidic substance according to the first, second or third invention, wherein the porous inorganic member has a function of adsorbing an aluminosilicate compound mainly composed of an aluminosilicate and an acidic substance. It contains an adsorbent and a basic substance adsorbent having a function of adsorbing a basic substance.
The water purification agent according to a fifth aspect of the present invention is the water purification agent according to the fourth aspect, wherein the content of the acidic substance adsorbent is 40 to 60 parts by volume with respect to 100 parts by volume of the aluminosilicate compound. However, it is mix | blended so that it may become 90-110 volume parts with respect to 100 volume parts of said aluminosilicate compounds.
The water purification agent of the sixth invention is characterized in that, in the fourth or fifth invention, the aluminosilicate compound contains zeolite.
The water purification agent of the seventh invention is characterized in that, in the fourth, fifth or sixth invention, the acidic substance adsorbent contains aluminum hydroxide hydrate containing aluminum hydroxide as a main component.
The water purification agent according to an eighth aspect of the present invention is the third, fifth, sixth, or seventh aspect, wherein the basic substance adsorbent contains a silicon dioxide compound containing silicon dioxide as a main component and containing aluminum oxide. It is characterized by.

According to the first aspect of the present invention, the water quality in the closed water system can be maintained transparent for a long time by the interaction between the porous inorganic member and the enzyme. That is, the water quality can be maintained for a long period of time only by a simple operation of adding the water purification agent of the present invention to water in a closed water system such as a water tank or ginger. For this reason, the water exchange work for maintaining the water quality of the water in the closed type water system facility can be eliminated. In other words, since the interval between water changes can be greatly extended, the effort for managing the water quality to a desired state can be reduced.
According to the second to fifth inventions, the acidic substance and the basic substance contained in the water accommodated in the closed water system can be reliably removed, so that the quality of the water in the closed water system is ensured. It can be kept transparent for a long time.
According to the sixth to eighth inventions, when the aluminosilicate compound contains zeolite, the contained material in water can be reliably adsorbed to a large number of pores in the crystal structure. Moreover, when the acidic substance adsorbent contains aluminum hydroxide hydrate containing aluminum hydroxide as a main component, the acidic substance can be adsorbed more reliably. Furthermore, when the basic substance adsorbent includes a silicon dioxide compound containing silicon dioxide as a main component and containing aluminum oxide, the basic substance can be reliably adsorbed.

It is a schematic explanatory drawing of the condition which used the water purification agent of this invention for the closed type water system equipment which is a water tank. It is the figure which showed the experimental result (ammonium ion concentration). It is the figure which showed the experimental result (sulfate ion concentration). It is the figure which showed the experimental result (total nitrogen concentration). It is the figure which showed the experimental result (total phosphorus concentration). It is the figure which showed the experimental result (ammonium ion concentration) at the time of adding the water purification agent of this invention to a comparison water tank. It is the figure which showed the experimental result (total phosphorus concentration) at the time of adding the water purification agent of this invention to a comparative water tank.

  The water purification agent of the present invention is characterized in that the water quality in the closed water system can be maintained in a transparent state over a long period of time.

  The closed water system using the water purification agent of the present invention is a facility having a hollow storage space capable of storing water, and the internal storage space can be isolated to some extent from the outside. There is no particular limitation as long as it is a facility capable of breeding or culturing fish and shellfish in the accommodation space. For example, a general aquarium facility used at home, a large aquarium facility used in a pet shop, and the like can be mentioned. In addition, ginger facilities used for aquaculture on land are also included as closed water system facilities that use the water purification agent of the present invention. Furthermore, a water tank facility, a ginger facility, and the like that pour a certain amount of internal water are also included as a closed water system facility that uses the water purification agent of the present invention.

  Further, the water purification agent of the present invention may be in any form such as liquid, solid, paste, powder, etc., and is not particularly limited. For example, in the case of a liquid state mixed with water, when the water purification agent of the present invention is added to the water in the closed water system, only a predetermined amount is added, so that the operation can be easily performed.

  First, before describing the water purification agent of the present invention in detail, an outline will be described.

  The water purification agent of the present invention contains a granular porous inorganic member having a function of adsorbing dissolved substances in water and an enzyme having a predetermined function. And the enzyme contained in the water purification agent of this invention has three types, the proteolytic enzyme which has a function which decomposes | disassembles protein, the lipolytic enzyme which has the function which decomposes | disassembles fat, and the amylolytic enzyme which has the function which decomposes | disassembles starch. It contains enzymes.

  For this reason, if the water purification agent of the present invention is mixed with the water accommodated in the accommodating space in the closed water system, the substance dissolved in the water by the granular porous inorganic member having a large number of pores on the surface Can be adsorbed to the large number of pores. And this adsorbed substance can be decomposed by the enzyme contained in the water purification agent of the present invention. That is, by mixing the water purification agent of the present invention due to the interaction between the two, the water quality can be maintained transparent for a long period of time.

  In addition, as a substance dissolved in the water accommodated in the accommodation space in the closed-type water system facilities, for example, ammonia that is toxic to the aquarium fish, excrement of the aquarium fish, or residual bait is decomposed. Phosphorus substances and nitrogen substances that are water quality deteriorating substances.

  In particular, when the aspect of the water purification agent of the present invention is in a liquid state, the enzyme can adhere to the granular porous inorganic member in the used state. That is, it can be set as the state which an enzyme exists in the pore inside a porous inorganic member. Then, the function of purifying the water quality can be quickly exhibited, and since the enzyme is attached to the porous inorganic member, the water-deteriorating substance and the enzyme can be brought into contact with each other more reliably. It is preferable because the purification function can be maintained over a wide range.

  In this case, the water quality can be maintained for a long period of time only by a simple operation of adding the water purification agent of the present invention to water in a closed water system such as a water tank or ginger. For this reason, the water exchange work for maintaining the water quality of the water in the closed type water system facility can be eliminated. In other words, since the interval between water changes can be greatly extended, the effort for managing the water quality to a desired state can be reduced.

  In particular, the water purification agent of the present invention is adjusted so that the enzyme content is 0.3 to 1.5 parts by volume with respect to 100 parts by volume of the granular porous inorganic member. With such a blending ratio, the substance adsorbed by the granular porous inorganic member can be reliably decomposed by an enzyme, so that a desired water quality can be maintained for a longer period of time.

In addition, if the content of the enzyme is more than 1.5 parts by volume with respect to 100 parts by volume of the porous inorganic member, foaming or the like may occur. Moreover, if it becomes less than 0.3 volume part, the problem that the function which decomposes | disassembles the dissolved substance by an enzyme will arise.
Therefore, the content of the enzyme in the water purification agent of the present invention is preferably 0.3 to 1.5 parts by volume, particularly 0.5 to 1.0 parts by volume with respect to 100 parts by volume of the porous inorganic member. Part is preferable, and 0.5 part by volume is more preferable.

  Hereinafter, the contents contained in the water purification agent of the present invention will be described in detail.

(About enzymes)
As described above, the enzyme in the water purification agent of the present invention contains a proteolytic enzyme, a lipolytic enzyme, and a amylolytic enzyme.

  The proteolytic enzyme is not particularly limited as long as it is an enzyme having a function of degrading protein. For example, a protease can be mentioned.

  The lipolytic enzyme is not particularly limited as long as it is an enzyme having a function of decomposing fat. For example, lipase can be mentioned.

  The starch degrading enzyme is not particularly limited as long as it is an enzyme having a function of degrading starch. For example, amylase can be mentioned.

  In addition to the enzyme having the above-described function, an enzyme having a function of promoting the growth of bacteria present in water may be included.

  Moreover, the enzyme in the water purification agent of this invention will not be specifically limited if it contains the three types of enzymes mentioned above. For example, those prepared by mixing the respective enzymes may be employed, or those already mixed may be employed.

  In particular, the enzyme in the water purification agent of the present invention preferably contains a phytic acid decomposing enzyme that decomposes phytic acid, and is not particularly limited as long as it has a function of decomposing phytic acid. An example is phytase.

  The reason why the above-described effects can be obtained by including a phytic acid-degrading enzyme that decomposes phytic acid is unknown, but the above-described water purification effect and water quality maintenance effect can be obtained.

  In addition, when the phytic acid decomposing enzyme which decomposes | disassembles a phytic acid is contained, the following effects are also acquired.

  In general, fish and shellfish foods are rich in grains and beans. These cereals and beans contain a large amount of phytin having phosphoric acid in the molecule which is indispensable for the growth of fish and shellfish. However, many fish and shellfish do not have enough enzyme etc. which can hydrolyze phosphoric acid from this phytin. For this reason, even if food is given to fish shellfish reared or cultivated, phosphoric acid cannot be sufficiently ingested into the body. Then, in order to grow the fish and shellfish to a desired size, it is necessary to give more food, but excessive food also causes deterioration of water quality.

  However, by simply adding the water purification agent of the present invention containing phytate degrading enzyme to the water in the closed water system, the fish shells are absorbed into the body from the phytic acid of grains and beans contained in the fish shellfish food. Easy phosphoric acid can be liberated. For this reason, compared to the conventional breeding or aquaculture, fish shellfish having a size equal to or larger than that of the conventional can be reared or cultivated with a small amount of food.

A commercially available enzyme can be used as the above-described enzyme. For example, a mixture of three kinds of enzymes, rotase lipase and amylase (manufactured by Wako Pure Chemical Industries, Ltd., model number: pancreatin), protease (manufactured by Amano Enzyme, model numbers: SD-NY10, SD-AY10), Examples include lipase (manufactured by Amano Enzyme, model number: DF-Amano 15) and phytase (manufactured by Asuka Pharmaceutical Co., Ltd., model number: Asuka-5).
Further, the enzyme may further contain a microbial preparation (model number: Compo Dash Kyowa, manufactured by Asuka Pharmaceutical Co., Ltd.) for rapidly decomposing residual bait and the like.

(About porous inorganic materials)
As described above, the porous inorganic member in the water purification agent of the present invention is a granular member having a function of adsorbing dissolved substances contained in water in a closed water-system facility, and includes an aluminosilicate compound and an acidic substance adsorbent. And a basic substance adsorbent.
The particle size of the porous inorganic member is about 0.5 mm to about 4.0 mm.

The aluminosilicate compound is not particularly limited as long as it is a compound mainly composed of aluminosilicate. For example, zeolite or activated clay can be used.
In particular, if zeolite is contained as an aluminosilicate compound, the zeolite is a compound having a large number of pores in its crystal structure, and is a member that can incorporate substances of various sizes into the pores. For this reason, various substances can be adsorbed by zeolite without being limited by the properties of dissolved substances in water.

The acidic substance adsorbing material is not particularly limited as long as it is a compound having a function of adsorbing acidic substances. For example, the aluminum hydroxide hydrate which has aluminum hydroxide as a main component can be mentioned.
A commercially available compound can be used for the aluminum hydroxide hydrate. For example, Kyoward 200 (Al (OH) ₃ · xH ₂ O), Kyoward 400 (Al (OH) ₃ · NaHCO ₃ ), Kyoward 1000 (Mg _4.5 Al ₂ (OH) ₁₃ · CO ₃ · 3) .5H ₂ O) (all manufactured by Kyowa Chemical Industry Co., Ltd.).
In particular, KYOWARD 200 (Al (OH) ₃ xH ₂ O) is almost neutral even when mixed with water, so fish and shellfish that prefer neutral water quality are bred in a closed water system. Or, it is preferable to use it for culturing because it does not impair such fish and shellfish. In addition, KYOWARD 200 (Al (OH) ₃ .xH ₂ O) has a function of adsorbing ionized inorganic salts, and is therefore more preferable when fish shellfish to be cultivated or cultivated prefer a low inorganic salt concentration.

The basic substance adsorbing material is not particularly limited as long as it is a compound having a function of adsorbing a basic substance. For example, the silicon dioxide compound which has silicon dioxide as a main component and contains aluminum oxide can be mentioned.
As the silicon dioxide compound, a commercially available compound can be used. For example, Kyoward _{600 (2MgO · 6SiO 2 · xH} 2 O), ( both, manufactured by Kyowa Chemical Industry Co., Ltd.) Kyoward _{700 (Al 2 O 3 · 9SiO} 2 · xH 2 O) and the like.
In particular, Kyowaad _{700 (Al 2 O 3 · 9SiO} 2 · xH 2 O) , so has the function of specifically adsorbing ammonia and amine compounds are densely bred or farmed closed water system facilities in seafood It is preferred to use in some cases. For example, even when goldfish that excrete a large amount of excreta are reared overcrowded, the ammonia excreted by the goldfish is reliably adsorbed, and the ammonia concentration in the water is kept lower than a predetermined value. be able to.

Examples of acidic substances dissolved in water include inorganic acids such as hydrochloric acid, sulfuric acid and phosphoric acid, organic acids such as formic acid, acetic acid and sulfonic acid, or acidic gases such as sulfur dioxide, hydrogen sulfide and nitric acid. it can.
Examples of the acidic substance dissolved in water include basic substances such as ammonia, amine, sodium hydroxide, and potassium hydroxide.

  In particular, the content of the acidic substance adsorbent is 40 to 60 parts by volume with respect to 100 parts by volume of the aluminosilicate compound described above, and the content of the basic substance adsorbent is 100 parts by volume of the aluminosilicate compound described above. , 90 to 110 parts by volume is adjusted. With such a blending ratio, the acidic substance and the basic substance can be reliably adsorbed and removed from the water in the closed water system, so that the desired water quality can be maintained for a longer period of time.

  In particular, when freshwater fish are raised or cultivated, the amount of salt contained in the water is less than that of seawater. The water quality in the closed water system can be maintained for a long time in a state suitable for freshwater fish.

  In addition, when cultivating or cultivating seawater fish, if Kyoward 200, Kyoward 400 and Kyoward 1000 are adopted as the adsorbent for acidic substances, the water quality in the closed water system is suitable for seawater fish. It can be maintained for a long time in the state. It should be noted that when aquatic fishes are bred or cultivated, the amount of ammonia excreted is smaller than that of freshwater fish, and therefore a basic substance adsorbent may not be included.

(About bulk inorganic cleaner)
In addition, the water purification agent of the present invention is preferably used together with a bulky inorganic purification agent because the water purification effect and the water quality maintenance function can be easily exhibited. In this case, the inorganic purifying agent contains an aluminum oxide compound mainly composed of aluminum oxide, a silicon dioxide compound mainly composed of silicon dioxide, and a magnesium oxide compound mainly composed of magnesium oxide. can do. In addition, this block-shaped inorganic purification agent has a size of about 4 mm to about 8 mm.

For example, when used for fresh water, the bulk inorganic cleaning agent can be used in water by adjusting the mixing volume ratio of the aluminum oxide compound, silicon dioxide compound and magnesium oxide compound to 70:20:10. Ammonia, nitrous acid, nitric acid, phosphoric acid and the like can be adsorbed appropriately, so that the water quality in the closed water system can be maintained for a long time in a state suitable for freshwater fish.
And since this inorganic purification agent is a lump shape with a magnitude | size of about 4 mm-about 8 mm, if it accommodates in a net | network etc., it can be handled easily.

(About antifoaming agent)
If the water purification agent of the present invention further contains an antifoaming agent or a precipitating agent, it is possible to prevent generation of bubbles even if the water purification agent of the present invention is added to the closed water system. Even immediately after adding the water purification agent to the closed water system, it is preferable because the clear water quality can be maintained.

(About pH)
It is preferable in terms of environment and health if the hydrogen ion concentration index in the aqueous solution of the water purification agent of the present invention is adjusted to be substantially neutral (for example, pH 6 to 8).

  The effectiveness of the water purification function of the water purification agent of the present invention was confirmed.

  The closed water system facilities, water purification agents, conditions, etc. used in the experiment are as follows.

(Closed water system)
As a closed-type water system facility, a general 30 L water tank and an upper filtration device for circulating and filtering water in the water tank placed on the upper part of the 30 L water tank were used. And it put so that about 7 cm goldfish (Ryukin) might always become 11 in the water tank. In addition, a sponge-like mat for physically removing goldfish excrement and residual bait was disposed in the upper filtration device (see FIG. 1).

  In the experiment, three water tanks (water tank 1, water tank 2, and water tank 3) were used. In addition, the water tank 3 was used as a comparative water tank.

  First, goldfish were bred in the water tank 1, the water tank 2 and the water tank 3 for one week without adding the water purification agent of the present invention so that the water quality was almost the same before starting the experiment. That is, the three aquariums bred goldfish with only the mat provided in the upper filtration device.

  Subsequently, in the water tank 1 and the water tank 2, a lump-like inorganic purifying agent (two bags containing 200 g in a net bag) was disposed below the mat in the upper filtration device.

  Further, 20 ml of a water purification agent prepared as follows was added to the water tank 1 every week. Specifically, in the water tank 1, a bulk inorganic purification agent was disposed below the mat in the upper filtration device, and immediately thereafter, the water quality purification agent was added to the mat surface in the upper filtration device.

(Water purification agent)
The water purification agent was adjusted to contain the following contents.
Zeolite, Kyoward 200 (Al (OH) ₃ · xH ₂ O) (manufactured by Kyowa Chemical Industry Co., Ltd.) and Kyoward 700 (Al ₂ O ₃ · 9SiO ₂ · xH) are used as granular porous inorganic members of water purification agents. ₂ O) (manufactured by Kyowa Chemical Industry Co., Ltd.).

  In addition, as an enzyme of water purification agent, a mixture of three kinds of enzymes, protease lipase and amylase (Wako Pure Chemical Industries, Ltd., model: Pancreatin), Phytase (Asuka Pharmaceutical Co., Ltd., model: Asuka) What mixed -5) was used.

Each content was mixed so that an enzyme might be 0.5 volume part with respect to 100 volume part of a granular porous inorganic member. Moreover, it mixed so that Kyoward 200 might be 50 volume parts and Kyoward 700 might be 100 volume parts with respect to 100 volume parts of zeolite, and 1500 ml of mixing raw materials were prepared. And this mixing raw material was melt | dissolved in 10 L of water, stirring, and the water purification agent was prepared.
The pH of this water purification agent was adjusted to be about pH 7.

(Measurement item)
In the experiment, after a predetermined period, a predetermined amount of water was collected from each water tank and used for analysis of the measurement target item. After sampling, the same amount of water as that of sampling was added to each tank.
In the experiment, ammonium ion (NH ₄ ⁺ ) (mg / l), sulfate ion (SO ₄ ²⁻ ) (mg / l), total nitrogen (TN) (mg / l), and total phosphorus were measured. (TP) (mg / l) was measured.

In addition, ammonium ion (NH ₄ ⁺ ) (mg / l) is JIS K 0102 42.5, sulfate ion (SO ₄ ²⁻ ) (mg / l) is JIS K 0102 41.3, total nitrogen (TN) (Mg / l) was analyzed based on JIS K 0120-45.2 UV spectrophotometry, and total phosphorus (TP) (mg / l) was analyzed based on JIS K 0120-46.3.1.

(result)
The experimental results are shown in FIGS.
In FIG. 2 to FIG. 5, the water quality of each tank for about two months converted from one week before the start of the experiment is shown in a graph.
As shown in FIGS. 2 to 5, ammonium ion (NH ₄ ⁺ ) concentration, sulfate ion (SO ₄ ²⁻ ) concentration, total nitrogen (TN) concentration, and total phosphorus (TP) in the water tank 1 and the water tank 2 ) Each concentration value showed a significant difference by comparing each value of the comparative water tank 3. In particular, as shown in FIGS. 2, 3, and 5, the values of ammonium ion (NH ₄ ⁺ ) concentration, sulfate ion (SO ₄ ²⁻ ) concentration, and total phosphorus (TP) concentration are compared with each other in comparison water tank 3. It was confirmed that there was a clear advantage difference compared to the value of.

  Moreover, the transparency of each water tank was able to confirm the back of the rear side wall of the water tank in the water tank 1 and the water tank 2 when viewed from the front (when viewed in a direction perpendicular to the paper surface in FIG. 1). However, in the water tank 3, the water was so cloudy that it was difficult to confirm even the rear side wall of the water tank in a front view, and the goldfish was breathing on the water surface (see FIG. 1).

  Therefore, it has been confirmed that the water purification agent of the present invention can exhibit an excellent water purification function if each of the porous inorganic member and the enzyme is prepared to have a predetermined content.

Next, the performance of the water purification agent of the present invention was confirmed.
In the experiment, the water purification agent of the present invention was added to the comparative water tank 3 after about two months from the start of the experiment.

As representative examples of the experimental results, the experimental results of ammonium ion (NH ₄ ⁺ ) concentration and total phosphorus (TP) concentration are shown in FIG. 6 and FIG.
As shown in FIG. 6 and FIG. 7, if the water purification agent of the present invention is added to the comparative water tank 3 that has passed about 2 months from the start of the experiment, in the analysis results after 5 days after the addition of the water purification agent, It was confirmed that the values of ammonium ion (NH ₄ ⁺ ) concentration and total phosphorus (TP) concentration in the water in the water tank 3 can be extremely reduced as compared with those before the addition. In particular, as shown in FIG. 7, at the total phosphorus (TP) concentration, the value before adding the water purification agent was 4.5 mg / l, but after addition, it is 0.5 mg / l or less. It was confirmed that it can be reduced to.

  Therefore, even if the water purification agent of this invention was the water quality which deteriorated, if the water purification agent was added, it has confirmed that the outstanding purification effect was exhibited. In addition, it was confirmed that the water purification agent of the present invention has a quick purifying function.

  Next, it was confirmed that the water purification agent of the present invention can be used in a septic tank.

In the experiment, a household septic tank (Dyki separation buck system 10-person tank, activated sludge system) was used as a closed water system that uses the water purification agent of the present invention.
In the experiment, the water purification agent was added directly into the septic tank at a rate of 40 ml / day.

Table 1 below shows the experimental results two months after the start of the addition of the water purification agent.
As shown in Table 1, when a water purification agent was added to the septic tank, the transparency was improved and the odor peculiar to the septic tank could be made almost odorless.

  Therefore, it was confirmed that the water purification agent of the present invention can also be used in a septic tank, can purify sewage in the septic tank, and can significantly improve odor.

  The water purification agent of the present invention is suitable for water purification of a closed water system equipped with a water tank or a ginger or a closed water system equipped with a septic tank.

Air Air P Pump for upper filtration device M Mat for upper filtration device

Claims (8)

A purifying agent that is used in a closed-type water system facility that has a hollow accommodating space capable of accommodating water, and the accommodating space is substantially isolated from the outside,
A granular porous inorganic member having a function of adsorbing dissolved substances in water in a state in which water is accommodated in an accommodation space of the closed water-system facility, and an enzyme,
The enzyme is
A proteolytic enzyme having a function of degrading protein;
A lipolytic enzyme having a function of breaking down fat;
A water purification agent comprising a starch degrading enzyme having a function of degrading starch. The enzyme is
The water purification agent according to claim 1, comprising a phytic acid decomposing enzyme having a function of decomposing phytic acid. The enzyme content is
The water purification agent according to claim 1 or 2, wherein the water purification agent is blended so as to be 0.3 to 1.5 parts by volume with respect to 100 parts by volume of the granular porous inorganic member. The porous inorganic member is
An aluminosilicate compound based on aluminosilicate;
An acidic substance adsorbent having a function of adsorbing acidic substances;
The water purification agent according to claim 1, 2 or 3, comprising a basic substance adsorbent having a function of adsorbing a basic substance. The content of the acidic substance adsorbent is
40 to 60 parts by volume with respect to 100 parts by volume of the aluminosilicate compound,
The content of the basic substance adsorbent is
The water purification agent according to claim 4, wherein the water purification agent is blended so as to be 90 to 110 parts by volume with respect to 100 parts by volume of the aluminosilicate compound. In the aluminosilicate compound,
The water purification agent according to claim 4 or 5, wherein zeolite is contained. The acidic substance adsorbent is
The water purification agent according to claim 4, 5 or 6, comprising aluminum hydroxide hydrate mainly composed of aluminum hydroxide. The basic substance adsorbent is
The water purification agent according to claim 3, 5, 6, or 7, comprising a silicon dioxide compound containing silicon dioxide as a main component and containing aluminum oxide.