JPS60209214A - High-speed clarification process of filthy water - Google Patents

Abstract

PURPOSE:To clarify filthy water easily and in a short time utilizing the fact that precipitation of contaminants is performed quickly and with remarkably high clarifying effect when a mixture of fine igneous rock powder (e.g. liparite), fine powder of pumiceous sedimentary rock, and an inorg. coagulant is added to filthy water. CONSTITUTION:10-5,000ppm treating agent (a) consisting of fine powder of igneous rock such as liparite having an adjusted particle size distribution comprising >=70% particles having 30-100mum particle size, 0-500ppm treating agent (b) consisting of fine powder of pumiceous sedimentary rock having particle size adjusted to 30-100mum, and 10-10,000ppm inorg. coagulant comprising aluminium sulphate, were added to filthy water and the mixture is stirred and formed precipitate is removed. As the result, filthy water is clarified easily in a short time without requirement for a large size treating apparatus.

Description

Detailed Description of the Invention (3-1) Industrial Application Field The present invention relates to a treatment method for rapidly clarifying polluted water. Fine powder of igneous rocks containing feldspar (plagioclase, alkali feldspar) in the pyrite (hereinafter simply referred to as ``Izumi reptile, etc.'') and pyrolithic rocks such as pyrolithic floating rock sedimentary rock, pyrolithic tuff, etc. A pulverizing agent containing a fine powder of floating rock sedimentary rock containing plagioclase (hereinafter simply referred to as "floating sedimentary rock") and an inorganic flocculant such as aluminum salt are simultaneously polluted. The present invention relates to a method for high-speed clarification of polluted water, which makes coagulation and sedimentation of polluted components much more efficient than conventional methods by injecting them into water.

(3-2) Conventional technology In the case of treating water containing suspended solids, it is possible to purify tap water, water for fly industry, treatment of domestic wastewater such as hospitals, schools, hotels, kitchens, industrial wastewater, food, dyeing, etc. Treatment of industrial wastewater such as chemical and pharmaceutical factory wastewater can be considered, but in either case, equipment such as a sieve, sieving tank, sedimentation tank, filtration tank, etc. will be installed, and the equipment will carry out adsorption, coagulation, and activation as appropriate. Clarification is carried out by means of processing operations such as the following.

For example, in water purification treatment, chemical separation or sterilization of manganese and iron using chlorine, flocculants such as polyaluminum chloride, aluminum sulfate, and iron chloride, and coagulation aids such as slaked lime and soda ash are used to prevent gravity precipitation. Treatment is carried out by appropriate combinations of physical and chemical treatments, sludge, biological treatments using activated forms, and the like. However, all of these conventional treatment methods for treating polluted water require large-scale treatment equipment, requiring large equipment costs and installation space, and have the drawbacks of requiring considerable time for treatment. Ta.

(3-3) Purpose of the invention The present invention improves the above-mentioned drawbacks of conventional treatment methods for clarifying polluted water, and clears polluted water easily and in an extremely short time without requiring large-scale treatment equipment. We provide a processing method to
The aim is also to provide a simple method for securing emergency water in times of disaster.

(3-4) Structure and function of the invention When was an inorganic flocculant used to treat polluted water?
&) It has been going through rapid development and changes with the development of industry and industry for some time, and basic aluminum chloride was discovered in the UK and the US in the 1960s, and improved products of it were introduced in Japan. Invented (Special Publication No. 47-21401)
is widely used.

Its features include separation of contaminants through hydrolysis, ion adsorption, floc cross-linking, and coagulation.

The inventor of the present invention has conducted various studies on adding other substances to this inorganic flocculant to clarify polluted water. By adding an inorganic flocculant to the fine powder of floating rocks, etc., which are also found everywhere in Japan, the sedimentation of pollutants is extremely rapid, and the clarification effect is also excellent. I came to discover that.

The present invention was made as a result of this, and after adding a predetermined ratio of itobara rock, etc. whose particle size has been adjusted to polluted water, fine powder of floating rock sedimentary rock, and an inorganic flocculant in a predetermined ratio, the raw acid was added to the polluted water. This objective is achieved by removing the precipitate.

The components of each processing agent will be explained in detail below.

(α) Fine powder such as harystone: As mentioned above, Machikisha rock is a type of igneous rock, and contains feldspars such as plagioclase and alkali feldspar in its pyrite, and further contains quartz and mica. It is hardened rock volcanic material ejected from a volcano. Although it is produced all over the country, τhyolitt is typically found in Inayama Town, Sarashina District, Nagano, Arima Town, Hyogo Ward, Kobe City, and Naganofu. Also pearlite (pa
rlitg) Imari City, Saga Prefecture, and Mt. Horaiji, Minamishitara District, Aichi Prefecture are famous. Furthermore, mud lava (m
Kumamoto-based Amakusa, Takachiho-cho, Usuki-gun, Miyazaki Prefecture, etc. are known as producing areas of ud-1avα). The particle size of all of these igneous rocks is adjusted so that they contain 70 or more particles of 30 to ioomμ, but the fine powder of less than 30μ is agglomeration of contaminants. ．．
? b Masaki 1. It has the disadvantage of worsening the 11f of smoke, and also has the disadvantage of impeding adsorption, coagulation, and formation of flocs because it rapidly settles if it exceeds 100 mμ.

Another reason why the grain size is 30 to 1QQmμ7 (l) is that the rock is a metal deposit of gold, silver, copper, etc., and during the process of crushing, pulverization, and refining, the grain size in the above range is This is because the cost is extremely low because the product is produced as a by-product as an unnecessary item.

(b) Floating sedimentary rock The main components of floating sedimentary rock are corrugated, feldspar, quartz, etc., as well as sulfurite.

In contrast to igneous rock, which is hardened rock that has been ejected from volcanoes, floating sedimentary rock is porous rock that is formed by crushing rocks and depositing them on the surface of the earth or in water. This is a point.

1 lithology floating rock sedimentary rock (rhyolitjc pwmicg
, sadimgntary siliceous, sodium, potassium,
It is an igneous rock that has adsorbed calcium (calcium, etc.) and has been transformed into a sedimentary rock.

Furthermore, pumice tuff (pumicgow ttLg) is a rock known as Oya stone, which is produced in Yamayama Village, Kawachi District, Tochigi Prefecture. - The grain size of these rocks is adjusted so that the grain size is 30 to 100 mμ. Particles with a particle size smaller than SOW μ have the disadvantage of hindering the agglomeration effect of pollutants, significantly prolonging settling time, and worsening clarity and turbidity, as in the case of shingles, etc.
Furthermore, particles exceeding 100 mμ have the disadvantage of rapidly settling, which hinders adsorption, aggregation, and the formation of flocs. In addition, when processing floating rock sedimentary rock to produce plant beds and polishing sand, substances of the order of 36 to 1QQmμ are produced as non-standard products, so the cost is extremely low, similar to the case with rock. It is.

(C) Inorganic flocculants: Inorganic flocculants have the effect of promoting the flocculation of pollutants in water by suspending them in water so that the force exceeds the repulsive force due to electrical charge, and they are inexpensive and harmless. As aluminum sulfate (Ajz(Sot)s
・18Hgo), salt layered aluminum chloride (A~(O
H) mc's polymer), ferrous sulfate (Fs80
4゛7HsO), ferric chloride (F#CLs°6Hs
O), ferric sulfate CF < 5 (804) Hatake, F & De O),
Chlorinated Kotsubarasu (Fn (80m) *” FsCls
) Tokaal. The inorganic flocculant used for water supply is J.
The standard is defined in ISK-1475.

By blending the treatment agents (α), $(A), l(C) described above in appropriate proportions, and adding them to the polluted water (depending on the nature of the polluted water, adding an appropriate polymer flocculant and coagulation aid), (better results can be obtained.) If the mixture is stirred, the floc formation rate and sedimentation properties will be significantly greater than in the conventional method.

For example, when treating polluted river water with a turbidity of 4,717 to 1,00 degrees, the conventional method requires approximately 30 minutes to reduce the total amount of treated water to a turbidity of 2 degrees after stirring using the specified cylinder test method. 125 minutes, and about 9 minutes in the method according to the invention. As described above, the treatment method according to the present invention enables high-speed treatment of polluted water in a short time of 115 to "A5" compared to the conventional method.

Such a fact was completely unexpected to those skilled in the art, and was something that no one had been able to accomplish in the past.

The working mechanism 4 of such high-speed clarification of polluted water is not yet clear, but it can be inferred as follows. In other words, plagioclase contains the treatment agent (αBaA) VC.

In addition to the adsorption purification effect due to the component structure of the wave-stripe component and porous floating rock sedimentary rock, the negative charge of the P particle size-adjusted particles has an affinity that matches the high positive charge of the flocculant containing sulfate ions. Furthermore, it is believed that the fine powder of processing agents (a) and (A) has the effect of stabilizing the formation and crosslinking of giant flocs by the flocculant, tightening them to an appropriate size, and making them stronger. It is also presumed that it has the effect of strongly adsorbing the components contained in the treatment agent (α) I (b), the floating rock structure tit, and impurities dissolved in water. It is thought that high-speed clarification of polluted water was achieved through the physical and chemical effects described above.

When the coagulated precipitate obtained by the treatment method of the present invention was actually examined under a microscope, it was found that the fine powder with adjusted particle size of the treatment agents (α) and (b) coagulated into the contaminant coagulation bonds between the pyramidal units of aluminum chloride. The effect of treatment agents (a) and (b) can be clearly observed, with the flocs having a size of 2 to 3 mm and dense crosslinking. On the other hand, when the conventional method is used, the size of the aggregated flocs is about 4 to 7 mm, and it is observed that the entanglement between the aluminum chloride pyramids, the aggregation, and the crosslinking of the flocs are rough.

In addition, microscopic investigations related to the processing method of the present invention revealed that a large number of aluminum fine aggregates (20 to 1
00mμ) also coagulates and binds contaminants with a size of around 1mμ or more, and the treatment agent (α) is used for these as well.

(b) It is observed that the particles are adhered □. In the conventional method, fine aluminum aggregates of about 20 to 100 y x μ containing these pollutants remain suspended in water for a long time without settling or floating due to the interference of saponified organic matter, etc. ) It is often observed that all these fine aggregates are prevented from floating and are separated from the water and allowed to settle.

This treatment method of adding treatment agents (a) and (b) to clarify water is a process that is backward in time from conventional treatment methods. That is, if only the forced sedimentation is prevented by adding the treatment agent (α)t(b), it is obvious that the quality of the water will deteriorate.・However, that is what I have said above.

In the treatment method according to the present invention, the treatment agent (IZ) t
It is presumed that (A) makes a large contribution to the absorption and adsorption of impurities.

Treatment agent outside the particle size adjustment range (α) l (A) Fine powder (for example, 4 mμ to 10711 μ) has a small mass charge6, does not bond with the flocculant, and floats alone in water, and the treatment agent (α) The coarse particles (200 mμ or more) of (b) adhere to the pyramids of aluminum chloride and rapidly settle. From these observations, particles other than those whose particle size was adjusted in treatment agent (Q) l (h) have the characteristics of a flocculant, such as adsorption, flocculation, and
It was found that the cross-linking and floc sedimentation functions were hindered.

Treatment agent (a) L<b> is in dry granular form and used separately.
Or use a mixture. Whether the processing agent (C) is used in liquid form or in dry powder form, the effect is not affected.

Furthermore, when the processing agent (α) j Cb) * (e) is used in the form of dry powder, its performance is stable over a long period of time as long as there is no melting and assimilation due to moisture.

The water targeted by the high-speed clarification treatment method according to the present invention includes tap water, industrial wastewater, industrial wastewater, etc., and the treatment agent ra>,'.

(A) # The amount of (0) added depends on the properties of the water to be treated, including turbidity, size of suspended particles, PH1 charge, type of components, etc.

It is not possible to make a general statement depending on other factors such as the turbidity of the treatment, the mechanism of the treatment equipment, the presence or absence of additives for treatment, etc.

However, in general, for fine particle suspensions, the treatment agent (a) is about 10 to 5,000 ppm, (A) is about 0 to 500 ppm, and (c) is about 10 to 10,0 ppm.
p at about 00 ppm.

To be more specific, when the concentration of suspended particles is high, similar to that of sewage sludge, the treatment agent (α) is approximately 500 PPn.
~5,000 ppm, (b) is 0~5007F77
1(0) is used in a range of about 500 to 10.000 ppm. In addition, in the case of relatively low turbidity stock solutions such as groundwater and river water, the treatment agent (a) should be 10 to 1ρOOppm, (A
) is 0 to 100. pPm (C) is 10 to 1,000p
Use within the range of p book.

After investigating the necessary properties of the water to be treated during actual treatment, the most excellent distribution of treatment agents (α) + (b) + (') should be determined experimentally with reference to the examples described later. is necessary.

A notable use of the present invention is for emergency water use during disasters. It is a well-established theory that water is the most inconvenient thing in the event of a disaster such as an earthquake.
After treating accumulated water or the like with the method of the present invention, by using sodium hypochlorite, potable water can be easily obtained as demonstrated by the water quality test of leftover bath water described below.

(3-5) Examples In order to specifically understand the effects of the present invention, examples of high-speed clarification of hotel kitchen wastewater, underground sewage, river water, and bath wastewater will be described below. All of these examples are for illustrative purposes only, and it goes without saying that the present invention is not limited to these examples and can be effectively implemented in various other water treatments.

[Example 1] (Table 1, treatment agent (α) is tsururoite fine powder,
<h> uses floating rock sedimentary rock fine powder) As an example of industrial wastewater, secondary wastewater (turbidity 74°) after primary sieve sedimentation treatment was collected from hotel kitchen wastewater, and this was tested for purity using an 11-jar test. I conducted a test.

The processing method according to the present invention includes processing agent (α) soo (b)
10077m, and the treatment agent (c) component is JI for water supply.
Add 700 ppm of S standard A millet and 1 portion of organic polymer.

A necessary amount of NaOH solution is added to the liquid to be treated so that the pH becomes 7.1 after treatment. The processing agent (C) is added while stirring the liquid to be processed.
) was injected, then treatment agent (α) (A) was added and rapid stirring (150y:pm, ) was performed for 3 minutes, followed by slow stirring (40?:P, - for 1°0 minutes). After 10 minutes in a quiet device, the turbidity and COD of the supernatant were measured.

The results are shown in Table 1.

Table 1 In the water quality test results table, the product of the present invention indicates treated water treated by the method according to the present invention, and the same applies to each of the following examples (however,
In the examples below in the table, no organic polymer was used. )λ
The comparative product is a method treatment agent (α) l (
Item b) was not added, and the rest was treated in the same manner as the treatment method according to the present invention. ) The same applies to each of the following Examples. As is clear from the results in Table 1, the treatment method according to the present invention shows excellent results in that the turbidity rapidly decreases compared to the comparative product using the conventional treatment method. COD hasn't changed much. This shows that the properties of the flocculant are not impaired.

As shown in this example, in the treatment method according to the present invention, sedimentation and clarification are too fast with the jar test stirring method described above, so in the following examples, the cylinder test method as shown below is used as the stirring method. 250 mJ- was collected, treatment agent (α) (b) was injected, then treatment agent (C) was injected, followed by rapid inversion for 30 seconds and slow inversion for 7 minutes, and left to stand.

Because clarification occurs rapidly, the turbidity and pH of the entire liquid
(Take equal amounts from the top, middle, and bottom of the liquid.)

For supernatant water, enter the information in minutes after it has been allowed to stand still.

The treatment agent (O) is a flocculant for waterworks (JIS K-1475
Standard products).

[Example 2] (Table 2, Table 3, Treatment agent (G) (b)
(same as Example 1) Raw water turbidity 98°, 7) Groundwater of H7.42 was collected, and treatment agents (a) and (A) were kept constant ((g) sooppm, (
b) Changes in turbidity and pH for 30 minutes after standing by changing the concentration of treatment agent (C) at 10,100 pp (Table 2) and quantification of treatment agents (G), (A), and (C). Changes in turbidity over time (Table 3) of the product of the present invention and a comparative product made by the conventional method were measured.

, Table 2 Test results by changing the injection amount of treatment agent (O) [Treatment agent (a) 500ppm, (b) 100PPI
Quantitative addition, water temperature 22°C] Table 3 Time-dependent turbidity test results [Treatment agent (g) 5ooPpm, (A) 100FF
ffl (C) 2ooppm) From the results in Table 2, it can be seen that when the injection amount of the treatment agent (C) is 200 ppm or more, a remarkable effect is achieved in clarifying the turbidity. In addition, from the results in Table 3, the decrease in turbidity was significantly faster than that of the comparative product, and the supernatant liquid was 0.8
It shows a good value of °, which shows that it is also superior to the comparative products.

From Tables 1 to 3 above, it can be seen that for the liquid to be treated with a turbidity of around 50' to 100°, the processing agent (α) is 50°, depending on its properties.
0 to 1,000 PPm, processing agent (b) c approx. 1,000
PPT! Ls treatment agent (C) is 200 to 1,000 p
pm is used in practice, and for processing liquids with a turbidity of 100" or more, the injection amounts of processing agents (a), (b), and (C) must be greater than the above.

[Example 3] (Table 4, treatment agents (α) and (b) are the same as in Example 1) Table I water downstream of Tsurumi, Kanagawa Prefecture (turbidity 14.5°, pH 7
, 5) was sampled and measured using the test method described above. In this case, the treatment agent (α) is 250PP7, (b) 50PPW
L, (C) 150PPm was injected into raw water, and the turbidity over time, pH, and supernatant water turbidity and pH of 10 minutes after standing were measured for the invention product and the comparison product, and the results are shown in Table 4. Ta.

Table 4: Turbidity/pH test results [Water temperature 24°C] As shown in the table, the turbidity after 10 minutes of standing was much better than that of the comparative product, and the inventive product also showed that the total amount of treated liquid also shows an extremely rapid decrease in turbidity.

[Example 4] (Table 5) Using the raw water of Example 3, a test was conducted under the same test method, treatment agent, water temperature, etc. as in Example 3.1 Rapid turbidity as shown in Table 4 was observed. In order to investigate the effect of a decrease in water temperature on water quality, we measured the water quality of the invented product and comparative product. In other words, let it stand for 30 minutes and drain it with ASAF paper.
COD and other items were measured using two types of R liquids and raw water. The results are shown in Table 5.

As shown in Table 5, water quality test results, despite the rapid decrease in turbidity, the inventive product does not impede water quality compared to the comparative product, and improvements are seen in each item. .

[Example 5] (Tables 6 and 7, the treatment agent (α) and pearlite fine powder (h) are the same as in Example 1) Household residual bath water (turbidity 13.5°).

The pH was 7.24, and suspended solids (mainly organic matter dissolved or suspended in water) were collected after one day and tested. This test was conducted to determine whether bath water can be used as emergency water. In this test, other risk factors such as COD were also tested to see the effect of the high-speed clarification process according to the present invention on water quality.

First, in the first test, a method was adopted in which the treatment agent (C) was injected first, and the treatment agent (G) l (b) was injected later.

The treatment agent (C!) was fixed at 150 ppm, and the treatment agent (a)
t (A>pt) A mixture with a weight ratio of 1:0.2 was used, and the injection amount of the mixture was changed to improve the turbidity and pH.
was measured. The results are shown in Table 6.

Table 6 Test results by changing the injection amount of treatment agents (4) and (b) [30 minutes after standing, water temperature 24.5°C] In addition, in the second test, treatment agents (α>, <b> are as described above) 300 ppm was mixed at a weight ratio of 1:0.2, and the treatment agent (C) was 150 ppm.
The water quality was measured. The results are shown in Table 7. Table 7 Water quality test results In this test, only sediment was removed and the whole wave was measured.

As can be seen from Table 6, the injection amount of the mixture of treatment agents (a) I (h) was 300. ppm is sufficient, and injection above 9 is not considered necessary except in special cases, such as when the raw water exhibits a high degree of contamination. Furthermore, from the results in Table 7, it can be seen that although the treatment method according to the present invention exhibits an abnormally high-speed clarifying property, the water quality still shows excellent values and does not impair the properties of the flocculant at all. Proven.

[Example 6] (Table 8, treatment agent (α) (h) is the same as Example 1.
Based on the findings of Example 5, a test was conducted on the residual water in a home bath under even more severe conditions to determine whether it was drinkable based on the water quality standards of the Ministry of Health and Welfare.

Three people bathed in the bath at home for two consecutive days, and added two more leftover baths.
After leaving it for a day, it was used as raw water for testing. Processing agent (α) (A
)+i is the same as in Example 1, and the treatment method was the same as in Example 5, but the i chemical is (α) + (b) = 200Pp”
+ (α) r (A) = 1? 0.1 t (
C) = 1100FF.

In addition, sodium hypochlorite was added to the treated water as a sterilizing agent so that the residual chlorine was 1.0 ppm. The results are shown in Table 8.

Table 8: Residual bath water drinking suitability test 1 results [Treatment agent (α)]
10(b) = 200ppm (α):(A)=t:
0.1, (C) The values in table pass the water quality standards of the Ministry of Health and Welfare Ordinance, and the treatment agents (α), (b), (
The amount of e) is small. In other words, this high-speed sedimentation treatment method is of course very effective in emergencies, but it can also be used in various other fields. In addition, by passing the above-mentioned clear water through a laminated layer of nonwoven fabric containing 50% activated pulverized carbon, it was possible to further reduce fi and COD.

As shown in the above examples, according to the water treatment method according to the present invention, it is possible to quickly clarify polluted water.
Treatment agent (α) can also be used for raw water other than those shown in this example.
By appropriately changing the concentration of e (b) + (0), excellent results can be obtained in the same manner as in the above embodiments.

The processing agent (a) used in the examples all had a particle size of 30
The particle size was adjusted to contain 70-100 mm or more, but this particle size adjustment range is a rough guideline, and the present invention is effective even if the particle size slightly deviates from this range. Of course, it can be implemented. Processing agent(
As in the case of the particle size range of 30 to 100 mμ in b), this is a general guideline as in the case of the treatment agent (a), and the present invention can be effectively carried out even if the particle size range is slightly deviated.

The same can be said about the injection amount of each processing agent (-) j (phrase, (C). In the present invention, the injection amount of component (α) is 10 to 5,000 ppm, (b
) is 0 to 500 ppm, (c) is 10 to 10,00
Although it is limited to 0 ppm, this is also a rough guideline, and depending on the characteristics of the raw water, the present invention can be effectively implemented even with a value slightly outside this range.

(3-6) Effects of the Invention The present invention involves water pressure injecting a predetermined amount of a floating sedimentary rock such as cranestone and an inorganic coagulant whose particle size has been adjusted appropriately, stirring the mixture, and removing the generated precipitate. , it is possible to clarify polluted water at high speed, and it has the following excellent effects.

(1) Compared to various flocculants used conventionally, the flocculation and sedimentation time is greatly shortened. The above-mentioned lateral pressure deviation of river water can be treated in a short time of 1/6 to 1/15 of the conventional method.

(2) Although K is used for high-speed clarification, it greatly promotes the reduction of turbidity without impairing the functions of conventional flocculants (removal of organic matter, reduction of turbidity).

(3) The moisture content of the cake is low and the peelability is excellent.

The cake coagulated and sedimented by the method of the present invention has a low moisture content of around 50% and has excellent peelability, so it can be easily extracted from the lower conduit of the settling tank. In addition, the extracted cake can be easily solidified by natural drying, making it easy to process.

(4) Compared to conventional methods, processing agent (α), (b)
However, the processing agents (α) and (b) are used in small quantities and are inexpensive. That is, the processing agent (α
) l (b) are each made of fine powder of floating rock such as forest rock, and these are used as raw materials to produce polishing sand and plant nurseries, and in the production of gold, silver, and copper. This is because products that are out of grade or unnecessary can be easily used by simply sorting them by particle size using a sieve. Treatment agent (a)
and (b) are 110. as is clear from the examples.
Since it is often used in a range of 1 to 0.2, it is convenient to use a mixture at that ratio from the beginning. - (5) Easily separate and precipitate organic matter such as decayed matter from the liquid and maintain the precipitated state.

(6) When newly installing water treatment equipment, according to the method of the present invention, equipment costs such as agitation, flocculation, sedimentation, and discharge, as well as site space, can be significantly reduced.

(M) The method according to the present invention can be easily applied to water treatment equipment currently in operation, and by using it, the equipment capacity can be increased.

(8) In short, improving the performance of water treatment equipment and reducing its equipment costs (makes a great contribution to pollution control and makes it extremely easy to secure emergency water, especially in times of disaster).

Patent applicant Hori 1) Fujio (1 other person) Agent: Patent Attorney Tsuka Moto Osanbe

Claims (1)

[Scope of Claims] Treatment agent YIO-5 containing the following component (α) for polluted water.
000 ppm, the processing agent having the component (b) at θ~
500 ppm, processing agent having component (c) 10-1
A method for high-speed clarification of polluted water, which comprises adding 0,000 ppm, stirring, and then removing the generated precipitate. (α) Rhyolita whose particle size has been adjusted to contain 70 or more particles with a particle size of 30 to 100 μm.
, pearlite (parlitg), mud lava (mm −1
ava ) iso-vitreous and feldspar (plagioclase, alkali feldspar)
Igneous rock fine powder containing (b) Igneous rock sedimentary rock (rhyolitic floating rock with particle size adjusted to 30-100 mp)
g, sgdimtntary rock). Floatstone tuff (pumicgow t*bff) Floatstone sedimentary rock fine powder containing plagioclase in equiwave banded structure (C) Aluminum sulfate, ferrous sulfate, ferric sulfate, 1
7 + Baka-Rishi Shibolishisomeme 1 )-＾ j f
fl+l le1. Inorganic flocculants such as -1 and 11minium