JPH04193387A - Method for purifying sewage - Google Patents

Abstract

PURPOSE:To purify all kinds of sewage by utilizing the material existing in the natural world by bringing the sewage into contact with red balls formed by granulating clay contg. aluminum silicate and bringing the sewage into contact with magnetite ore grains. CONSTITUTION:The sewage emitted from an original liquid prepn. tank is introduced into a primary treating tank B where the sewage is brought into contact with the red balls 5 formed by granulating the clay contg. the aluminum silicate while the sewage is kept stirred by injection of air. The smells of the sewage are adsorbed into the red balls 5 and secondary mineral materials are migrated into primary mineral materials. The sewage emitted from the primary treating tank B is introduced to a secondary treating layer C where the sewage passes the red balls 5, magnetite ore grains 9, limestone grains 10, hydrous silicate 11 of zeolite, etc., red balls 5, limestone grains 10, quartz grains 12, and red balls 5 packed in containers 8a to 8h. The secondary mineral ores are migrated into the primary mineral ores at this time and the stabilization of the magnetic fields in the sewage, the purification by the limestone grains 10, the elution of mineral-components by the hydrous silicate 11, etc., are executed at this time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to various harmful industrial waste liquids such as developer solution, plating solution, pulp waste liquid discharged from factories, etc., and wastewater containing pesticides discharged from golf courses, etc. This relates to a sewage treatment system that uses natural products to treat and purify (detoxify) polluted water from lakes and marshes.

BACKGROUND OF THE INVENTION Industrial waste fluid discharged from factories and the like generally contains harmful substances such as organic substances, which come in a wide variety of types and have been treated using various methods.

Biochemical oxygen demand (BOD), chemical oxygen demand (COD), etc. are used as standards for measuring the purification state of these organic substances.

Water in nature has its own self-purifying ability and is well balanced. One of the reasons for this is said to be the effect of the magnetic field, and in sewage, etc., the magnetic field is unbalanced, so it is unable to exert its purifying effect.

Conventional technology in general [To treat wastewater containing inorganic suspended solids, there are two methods: a sedimentation separation method that separates by natural sedimentation, and a separation method by adding a flocculant to remove ultrafine particles that do not naturally settle. If the flocs or suspended matter are light and hydrophobic, pressure or electrolytic flotation methods can be used to float and separate the bacteria by attaching air bubbles, and if the waste liquid contains organic substances, Treatment methods such as the activated sludge method, which uses microorganisms to decompose organic matter, have been successfully adopted for wastewater treatment, but especially when the wastewater contains a large amount of suspended liquid or has an abnormal pH, it may contain harmful substances exceeding the permissible value. In cases where phenol, aldehydes, ketones, or heavy metal ions or cyanide are included, multiple treatment steps such as pretreatment are required.

Problems to be Solved by the Invention Therefore, in the case of organic waste liquid with high BOD and COD, special treatment is required, which takes time and a large amount of cost, so it is difficult to dispose of it in the ocean or bury it underground. However, recently secondary pollution has occurred due to such dumping and burial, and the water quality of rivers, lakes, and groundwater has deteriorated, and air pollution has occurred.

Environmental destruction such as soil pollution is progressing, and it is having a negative impact on living things and materials on earth.

The present invention was made in view of the drawbacks of the prior art, and provides a waste liquid treatment system that can lower BOD and COD values and remove heavy metal ions without using chemicals. The purpose is to

In order to solve this problem, we developed a method for purifying sewage that consists of the steps of bringing the sewage into contact with Akadama, which is made by granulating clay containing aluminosilicate, and bringing the sewage into contact with magnetite grains. Achieve your purpose. In order to promote the reactions in each step, it is preferable to perform air agitation while blowing air into the waste water.

Next, when the sewage contains a large amount of organic substances, a step of bringing the sewage into contact with red beads made by granulating clay containing aluminosilicate, a step of bringing the sewage into contact with magnetite ore grains, and a step of bringing the sewage into contact with magnetite grains. Sewage is purified by a method for purifying sewage comprising the steps of bringing the sewage into contact with iron or aluminum metal, contacting the sewage with a hydrous silicate such as zeolite, and contacting the sewage with a carbonate such as limestone. In this case as well, in order to promote the reactions in each step, it is preferable to perform air agitation while blowing air into the waste water.

The grain size of the grains to be contacted, such as red balls, is preferably about 0.5 to 5.0 wn.

Action: By bringing Akadama containing aluminosilicate into contact with treated water, secondary minerals (e.g. ferric ions) contained in the waste liquid are transferred to primary minerals (ferrous ions). .

By bringing the magnetite grains Fa"(Fe"Fa") 04 into contact with the treated water, the turbulence in the wastewater is corrected and stabilized due to the action of ferrimagnetism.

By bringing iron or aluminum metal into contact with wastewater, metals with a low ionization tendency (Zn, Cr, Cd,
Co, Ni, Sn, Pb, Cu-), etc. are precipitated. By bringing water-containing silicates such as zeolite into contact with wastewater, mineral components such as Hg, etc. are eluted in the wastewater, and the water is activated. become

By bringing the wastewater into contact with carunium carbonate such as limestone, the pH of the water can be adjusted to 7-8! At the same time, the water purification effect of calcium carbonate also purifies the water.

By blowing air into the wastewater and stirring it during the contact process with each substance in the wastewater, the number of times the substances come into contact with water can be increased and the reaction time can be shortened.

Furthermore, by dissolving oxygen in the air into the wastewater, it is possible to activate the wastewater and improve the settling properties of suspended solids.

Embodiments The present invention will be explained in detail below according to embodiments shown in the drawings.

Example-1 Raw solution adjustment tank A, primary treatment tank B, 2 as wastewater treatment tanks
Next treatment tank C1 3rd treatment tank and 4th treatment tank E are used.
As shown in Fig. 2, the raw solution treatment tank A is equipped with an air pipe 1 at the bottom of the tank A, and is configured to blow air into the wastewater from the air pipe 1. mouth, 3
is the outlet for treated wastewater.

This discharge port 3 communicates with the primary treatment tank B, and the primary treatment tank B has an air pipe 4 provided at its bottom as shown in FIG. 1.The surface of the wastewater is made of aluminum. Akadama (1 to 5 m
) 5 is filled into a mesh or punched container 6.

In addition, when using the primary treatment tank alone as a septic tank,
Instead of Akadama, granules of 60% Akadama, 30% limestone, and 10% magnetite ore, or granules of 85% Akadama and 15% magnetite ore, are used.

The water after contact is led to the secondary treatment tank C via the pipe 7.

As shown in FIG. 4, the secondary treatment tank C consists of eight containers 8a and 8b each having a plurality of holes punched therein.

It is divided into nine sections by 8c, 8d, 8e, 8f, 8g, and 8h, and inside the container 8 are 5 red balls, 92 magnetite grains, 10 limestone grains, and 10. Hydrous silicates such as zeolite 11. 52 red balls, 10 limestone grains, 12 quartz grains. It is packed with 5 red balls.

The discharge pipe 13 of the secondary treatment tank C communicates with the tertiary treatment tank. As shown in FIG. 5, the tertiary treatment tank has partition plates 14a,
14b, 15a, 15b, L6a, 16b,
1ea, 17b.

It is divided into seven sections via 18a, 18b, 19a, and 19b, and air pipes 20, 21 are installed at the bottom of the sectioned cypress.

22, 23, 24, 25, 26 are installed and configured to blow air into the waste water. Partition plate 14a, 1
4b, partition plate 15m, 15b, partition plate 16a, 1
6b, partition plates 17a, 17b, partition plates 18a, 18
b, and the partition plates 19a, 19b are installed with a predetermined spacing, and the partition plates 14a, 15a, 16
A, 17a, 18g, 19a are provided with communication ports 27, 29, 31, 33, 35, 37 at the top thereof, and partition plates 14b, 15b, 16b, 1.
At the bottom of 7b, 18b, and 19b, there is a communication port 2 with the adjacent room.
8, 30, 32, 34, 36, and 38 are provided, and the tank is designed so that the wastewater flows from the bottom to the top.

In addition, there are mesh containers or punched containers 4o, 42, 44.
．． 48, 50, 52 are installed, and each container 40-52 has a red ball 5. Magnetite grains 9, limestone grains 10, red beads 5, hydrated silicic acid lump grains 11 such as zeolite, quartz grains 12, and metal pieces 54 of iron or aluminum are packed. 56 is a discharge pipe of the treatment tank, which communicates with the quaternary treatment tank E.

The quaternary treatment tank E has partition plates 5B and 6 as shown in FIG.
It is divided into five rooms by 0.62.64, and the partition plate 5
A communication hole 66.68 is provided below 8.62,
Cutouts 70 and 72 are provided above the partition plates 60 and 64.

The five chambers partitioned by partition plates 58, 60, 62, and 64 each contain 5 Akadama and 11 hydrated silicic acid lumps such as zeolite.
, the sea sand 74 (two layers) is completely filled.

In the embodiment of the present invention having the configuration described above, air is first blown into the waste water in the stock solution adjustment tank A to cause the suspended solids to settle.

The sewage that has come out of the stock solution adjustment tank A is led to the primary treatment tank B, where air is blown out to agitate the sewage and bring it into contact with the red beads 5. The deep part of the sewage is adsorbed by the red beads and the secondary minerals are transferred to the primary minerals (about 3 to 6 hours).

The sewage that came out of the primary treatment tank B is led to the secondary treatment layer C, and the sewage is collected in containers 88 to 8h filled with Akadama 5 and foundation iron ore grains 9.
2 limestone grains 10. Hydrous silicates such as zeolites 11, Akadama 51, limestone grains 10, quartz grains 12. Pass red ball 5, and at that time 2
Transferring secondary minerals to primary minerals, stabilizing the magnetic field in wastewater,
Purification with limestone grains 10, elution of minerals with hydrated silicate 11, etc. are performed (about 4 hours).

The water purified in the secondary treatment tank C is transferred to the tertiary treatment tank, where it is again subjected to the agitation action of air to form hydrated silicic acid such as Akadama 5, magnetite grains 9, limestone grains 10, Akadama 5, and zeolite. lump grain 11
, brought into contact with quartz grains 12, iron or aluminum metal pieces 54, etc., transfers secondary minerals to primary minerals, stabilizes graveyards in sewage, purifies with limestone grains 10, hydrated silicate 1
The elution of minerals in step 1 is carried out (about 6 hours).

The water leaving the tertiary treatment tank is led to the 4th treatment tank E, where it passes through a clay layer, the filtered water is replenished with minerals in a hydrated silicate layer, and is then passed through sea sand. This completes the purification by replenishing salt and filtering.

In this example, the sewage is purified through the undiluted solution treatment tank and the primary to 4th treatment tanks; however, the present invention is not limited to this, and depending on the situation of the sewage, the primary treatment tank (Akadama In some cases, sufficient purification can be achieved by contact with magnetite ore particles).

Furthermore, if the condition of the waste water is extremely poor, the waste water may be configured to be circulated in each treatment tank. If COD is high, iron or aluminum metal pieces 54 in the tertiary treatment tank
It is better to use clay instead, and in the case of sewage containing a lot of chemicals, it is better to use a lot of magnetite ore grains and limestone (calcium carbonate) grains.

Using the apparatus according to this example, treatment tanks for various wastewater were changed from A to B to E (treatment method 1), A to B (instead of Akadama in Figure 3, 60% Akadama, 30% lime, and 10% magnetite ore).
)-E (M method 2),
A-B (A mixture of 85% Akadama and 15% magnetite particles was used instead of the Akadama shown in Figure 3:)-E (Processing method 3) or A-B-C→D-E (Processing method 3) A purification test was conducted in which wastewater was treated by flowing it in the order of method 4).

Example-1 Regarding the cleaning waste liquid shown in Table-1 below, A
When purified by treatment method 1 using a 4B→E treatment tank, the following results were obtained.

Example-2 Regarding the pickle factory waste liquid shown in Table-2 below, A-B-
When treatment method 2 using treatment tank E allowed purification, the result was as shown in the table below.

Table-2 Example-3 Regarding the pickle factory waste liquid shown in Table-3 below, A→B→
When purified by treatment method 3 using treatment tank E, the results were as shown in the table below.

Example 4 When wastewater from a rice center was purified by treatment method 4 using the apparatus according to the example, the results were as shown in Table 4.

Example 5 When wastewater from a cleaning shop was purified by treatment method 4 using the apparatus according to the example, the results were as shown in Table 5.

Table 5 Example 6 Wastewater from a cleaning shop was purified by treatment method 4 using the apparatus according to the example, resulting in the results shown in Table 6.

Example 7 Chemical wastewater 1 and 2 were purified by treatment method 4 using the apparatus according to the example, and the results were as shown in Table 7.

Example 8 When chemical waste water (developer) was purified by treatment method 4 using the apparatus according to the example, the results were as shown in Table 8.

Effects As described above, the sewage treatment method according to the present invention can purify all kinds of sewage using substances that exist in nature, and therefore has extremely high utility value.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention, in which FIG. 1 is a block diagram showing the connection relationship of processing tanks, FIG. 2 is a longitudinal cross-sectional view of the stock solution processing tank A, and FIG. 3 is a FIG. 4 is a longitudinal sectional view of the primary treatment tank, FIG. 4 is a longitudinal sectional view of the secondary treatment tank, FIG. 5 is a vertical sectional view of the tertiary treatment tank, and FIG. 6 is a vertical sectional view of the tertiary treatment tank. 1...Air piping 2...Sewage supply port 3...
・Exhaust port 4...Air pipe 5...Red ball
6... Container 7... Piping 8...
・Container 9... Magnetite grains 10... Limestone grains 1
1... Hydrous silicate 12... Quartz grains 14a-1
9b...Partition plate 20-26 Air piping 27, 29.3
1.3:1.35.37...Communication port 28, 30.32
．． 34.36.38...Communication port 40, 42.44.4
6.48.50.52... Container 54 5 metal pieces
56...Discharge pipe 58, 60.62.64...Partition plate 66.68...Communication hole 70.72...Notch 74...Sea sand

Claims (5)

[Claims] (1) A method for purifying sewage comprising the steps of bringing the sewage into contact with red beads made by granulating clay containing aluminosilicate, and bringing the sewage into contact with magnetite ore grains. (2) The method for purifying wastewater according to claim 1, wherein air is stirred while blowing air into the wastewater in each contact step. (3) A step of bringing the sewage into contact with red beads made by granulating clay containing aluminosilicate, a step of bringing the sewage into contact with magnetite ore grains, a step of bringing the sewage into contact with iron or aluminum metal, and a step of bringing the sewage into contact with iron or aluminum metal; A method for purifying sewage comprising the steps of bringing the sewage into contact with a hydrous silicate such as zeolite, and bringing the sewage into contact with calcium carbonate such as limestone. (4) The method for purifying wastewater according to claim 3, wherein air is stirred while blowing air into the wastewater in each contact step. The method for purifying wastewater according to claim 3, comprising the step of (5) bringing the wastewater into contact with sea sand.