JPH047085A - Filter medium - Google Patents

Abstract

PURPOSE:To obtain a filter medium capable of simply treating acidic waste water by mixing an incinerated ash powder obtained by drying and grinding the incineration ash of garbage if necessary with animal powdered bondes, alumina, clayey matter and powdery org. matter and molding the resulting mixture before baking the same. CONSTITUTION:An incineration ash powder obtained by drying and grinding the incineration ash of garbage if necessary is mixed with animal powdered bones, alumina, clayey matter and powdery org. matter and the resulting mixture is molded and baked to obtain a filter medium. When this filter medium is used, highly acidic waste water like waste water from a plating factory, a chemical factory, a sake brewing factory, a fruit juice factory, a starch factory or a neutralizing agent factory can be effectively treated and the water after treatment becomes neutral. Since this filter medium is extremely porous, treatment speed is high and waste water can be simply treated without requiring a special apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a filter material used in the treatment of wastewater, particularly acidic wastewater, and which uses garbage incineration ash as a raw material.

This has a major impact on the natural environment, causing destruction and pollution beyond the purifying effects of nature.

In order for humankind to always maintain a healthy and cultured life, it is necessary to eliminate the negative effects of industrial development and create a new environment suitable for the development of life. The problem of disposal of garbage incineration ash, which is the most familiar daily pollution, is a concern not only in Japan but also in countries around the world.

Various related organizations in various countries are conducting various studies on this issue of raw stain incineration ash disposal, but at present no fundamental solution has been found.

On the other hand, conventional methods for treating acidic wastewater include pH adjustment by adding alkali, activated carbon adsorption, aeration, ion exchange resin treatment, etc., but none of these methods can be easily treated or are sufficiently effective. There were other difficulties.

(Prior art) A new culture is being created by modern industries and industries developed by mankind.On the other hand, along with this, (Problem to be solved by the invention) The present invention is a method to solve the problem of garbage incineration ash disposal. In addition, the present invention provides a new and innovative filtration material that can overcome the difficulties of conventional waste liquid treatment methods.

(Means for Solving the Problems) The filter material of the present invention uses the incineration return powder obtained by drying and pulverizing the garbage incineration ash according to the RT requirements, and the incineration material is mixed with animal bone powder, alumina, clay, and organic matter powder. It is characterized by being mixed with, molded and fired.

Garbage is waste generated in daily life, and garbage incineration ash usually contains organic matter, ignition loss components, humic acid, residual silicon dioxide), metals, toxic heavy metals, etc.

The garbage incineration ash referred to in the present invention is preferably garbage incineration ash that does not substantially contain harmful heavy metals.

This garbage incineration return powder, which does not substantially contain harmful heavy metals,
Food waste incineration return powder from which toxic heavy metals have been removed, or incineration return powder obtained by incinerating food waste while removing heavy metals, such as mercury, cadmium, and lead in the presence of a heavy metal adsorbent. This is incineration return powder obtained by incineration while adsorbing chromium, etc.

The garbage incineration ash of the present invention that does not substantially contain harmful heavy metals usually has alkyl water mo of 0 per kg of garbage incineration ash.
5mg or less, cadmium 1mg or less, lead 10mg or less,
The amount of hexavalent chromium is 5 mg or less, and the incineration return powder is preferably one in which these heavy metals are not detected. This incineration return powder is alkaline.

In addition, the animal bone meal uses bones that have conventionally been mostly discarded at livestock farms, especially bones of animals such as cows, horses, sheep, etc., which are mainly hard bones.

The raw bones of these animals are cut into sizes that are easy to burn, and then placed in a pressure cooker at 200-400°C.
Boil for about 90 minutes. Next, the bones are placed in a firing furnace and fired at around 900 to 1100°C for around 60 to 180 minutes, boiled in the Somemama furnace for 60 minutes, and then allowed to cool naturally to return to room temperature or a state close to this temperature.

If lfi substances other than the blue component, such as seratin, fat, protein, and glue, remain in the bones, they will cause oxidative decay, so it is important to ensure that they are removed. By the above boiling process, it is possible to strongly separate and remove organic matter adhering not only to the outside but also to the inside of the pores from the bone.

By then passing through the above baking process, remaining organic matter can be completely removed, and at the same time the humidity in the bone can be reduced.
The water content can be reduced to several percent or less, preferably to almost 0%.

According to the above-mentioned firing conditions, the bones become skeletonized and maintain the original structure having numerous pores.

After the above-mentioned baking and cooling, the bone is crushed and powdered into powder powder to produce approximately 20 to 200 meshes, particularly preferably 50 to 1 mesh.
00 mesh powdered bone meal.

In the case of bovine bones, the above-mentioned bone powder has a yield of 40% by weight compared to raw raw bones. The particles contain calcium (approximately 33
The main components are phosphorus (approximately 16.7%), barium (approximately 103%), sodium (approximately 0.76%), sulfur (approximately 0.64%), and magnesium, potassium, chlorine, It is made of amine, iron, etc., and there are countless microscopic pores that communicate with each other inside and outside the particle. This bone powder is alkaline due to calcium and other factors.

The clay may be of any type as long as it acts as a binder, such as hentonite, acid clay, activated clay, kaolin clay,
Examples include sericite, pyrophyllite, fireclay, montmorillonite, chloride, etc.

Alumina also acts as a binder, and adding it increases the strength of the filter medium, but if it is added too much, the number of pores in the filter medium tends to decrease.

Organic powder is mixed with other ingredients, formed, and fired, and decomposes at the firing temperature, creating micropores in the compact. In order to obtain wood at a low cost, it is preferable to use inexpensive materials such as wood flour, rice bran, barley dregs, rice grains, waste wood powder, starch dregs, shochu dregs, etc.

The amount ratio of each component used in the present invention may be within a range that achieves the object of the present invention.

The ratio is usually 30 to 90 parts by weight of animal bone powder, preferably 45 to 75 parts by weight, and 10 to 30 parts by weight of clay based on 100 parts by weight of food waste incineration return powder that does not substantially contain harmful heavy metals.
Parts by weight, preferably 15 to 25 parts by weight, 7 to 2 parts by weight of alumina
1 part by weight, preferably 10 to 18 parts by weight, organic powder 3
-9 parts by weight, preferably 4 to 8 parts by weight.

The returned powder from garbage incineration increases the strength of the filter medium and significantly increases the processing capacity of waste liquid. In addition, animal bone powder has adsorption properties and has the property of reacting with acidic substances in waste liquid, and has the effect of increasing the amount of pores in the filter medium.

Organic powder is mixed with other ingredients, molded, and fired to create micropores in the compact during firing, and porous filter media is manufactured using garbage incineration return powder as the main raw material. It is essential to do so.

The filter medium of the present invention can be obtained by weighing and mixing the above-mentioned components to obtain a desired composition, adding water, molding, firing, and cooling. For example, 50 parts of garbage incineration ash (parts by weight, the same applies hereinafter) that does not contain harmful heavy metals, 30 parts of animal bone meal, 10 parts of binder, 7 parts of alumina, and organic powder. Three parts of the body are listed. The molded body is usually granular and has a size of about 1 mm to 15 mm, and the drying temperature and firing temperature are usually around 200°C and 800°C, respectively.
~1200°C.

The filter material of the invention has a large number of micropores generated by firing, and the amount of its constituent components is usually 100% of the total filtration material, which does not contain harmful heavy metals.
Based on parts by weight, animal bone powder 30-90 parts by weight, preferably 45-75 parts clay 10-30 parts by weight, preferably 15-25 parts by weight, alumina 7-26 parts by weight, preferably 10-18 parts by weight The range is appropriately selected from the range of .

The filter material of the present invention is used by being placed in a flow path of liquids to be treated and brought into contact with these liquids.

(Effects) The filter material of the present invention uses garbage incineration ash,
This could be an effective means of solving the problem of garbage incineration ash disposal.

By using the filter material of the present invention, highly acidic wastewater such as wastewater from Metsuki factories, chemical factories, sake brewing factories, juice factories, starch factories, neutralizer factories, etc. can be effectively treated. The liquid after treatment becomes neutral.

Since the filter medium of the present invention is extremely porous, it has the advantage of high processing speed.

By using the filter medium of the present invention, these treatments can be easily performed without requiring any special equipment.

The COD was 2 mg 7't', the SS was less than 1 mgz'p, and the coliform count was 0, 'm1.

Claims (1)

[Claims] A filter material made by mixing incineration ash powder obtained by drying and pulverizing garbage incineration ash with animal bone powder, alumina, clay, and organic powder, shaping and firing.