KR870001355B1 - Method for treating waste material - Google Patents

Abstract

This invention relates to the treating agent and treating method for waste materials which has a excellent fixing property for harmful materials and is easy to handle. The treating agent is made by mixing the quicklime 40.0-56.0 wt.%, siliceous magnesia powder 5.0- 14.0 wt.%, talcum powder 3.5-6.5 wt.%, calcium carbonate powder 12.5- 18.0 wt.%, clay powder 1.0-3.0 wt.%, almin acid calcium powder 9.0- 11.0 wt.% and the powder which contains the SO3 more than 50% 5-11.5 wt.%. The treating method is that the treating agent and waste material are mixed and dehydrated and shattered to pieces.

Description

Waste treatment method

1 is a perspective view cut away a part of the stirrer used in the embodiment of the present invention.

2 is a cross-sectional view taken along the line X-X of FIG.

* Explanation of symbols for main parts of the drawings

1 stirrer 2 reaction vessel

14: stirring blade

The present invention relates to a waste treatment agent and a treatment method thereof. Waste generated by the results of recent industrial activities and living activities has exceeded the limit of natural purification and has a huge amount. Therefore, in order to facilitate the circulation of materials between the natural environment and the living environment, waste disposal is urgently needed. have.

In the present invention, the waste refers to the result of industrial activities and living activities, and refers to waste oils, waste acids, waste alkalis, waste liquids of various organic matters, animal and animal wastes related to incinerators, sludge, mineral oils and animal oils of various wastes. Fruits and fish, various mineral residues, livestock manure, sludge sold out in manure and manure septic tanks, and streams, lakes or ponds, and marine sludge. Particularly, wastes containing one or two or more harmful substances such as organic chlorine compounds, organophosphate compounds, cyanide compounds, and harmful metals such as PCBs contained in these wastes are particularly called wastes containing hazardous substances.

There have been various methods for the conventional waste treatment, and especially those containing harmful substances were treated by a chemical treatment method which is harmless by a chemical reaction or by solidification by cement.

The chemical treatment is, for example, the treatment of hexavalent chromium (Cr ⁶⁺ ) with sulfuric acid from sodium sulfate to tribasic chromium (Cr ³⁺ ) and solidification with cement. It fixes the harmful substances at the time of solidification of cement by the alkali hydroxide precipitation effect and the adsorption effect of ion which are contained in.

However, because the chemical treatment is always followed by secondary pollution, the treatment fragments are very difficult, and the cement solidification method is simple to handle, but there is a limit to the immobilization of harmful substances, so the amount of elution of materials other than cardionium, lead, and arsenic is eluted. It is very difficult to limit the to within the allowable range, so the conventional treatment method is not satisfactory yet.

In view of such a conventional situation, the present invention is a new waste that can be applied to other wastes as well as to wastes containing simultaneously harmful substances that have the simplicity of cement solidification operation and have an immobilization function for harmful substances superior to cements. It is an object of the present invention to provide a treatment agent and a treatment method thereof.

Summary of the Invention The present invention relates to a waste treating agent comprising: 4 parts by weight of quicklime powder 40.0-56.0, 5.0-14.0 parts by weight of kotosilicate lime powder, 3.5-6.5 parts by weight of talc powder, 12.5-18.0 parts by weight of lime carbonate powder, clay 1.0-3.0 parts by weight of powder, 9.0-11.0 parts by weight of calcium aluminate powder and 8.5-11.5 parts by weight of powder containing 50% by weight or more of sulfur trioxide. In addition, the waste treatment method in the present invention is characterized by simultaneous dehydration and powdering of the treatment agent and the waste to be treated.

An embodiment of the present invention will be described in detail as follows. This invention uses the raw material which consists of the following components and specifications.

(1) quicklime powder

(2) Koshi silicate lime powder

(3) talc powder

(4) heavy lime carbonate powder

(5) clay powder

(6) calcium aluminate powder

(7) powders containing 50% by weight of sulfur trioxide (eg anhydrous aluminum silicate or gypsum)

(7a) anhydrous aluminum sulfate

(7b) plaster

The treatment agent of the present invention is obtained by mixing the raw materials of the above (1) to (7a) or (7b) in a necessary ratio.

The treatment method of waste using the treatment agent is as follows.

The waste is mixed with the treatment agent of the invention with or without pretreatment.

The waste pretreatment process converts hazardous metals into poorly soluble chemicals that are difficult to elute.

Table 1 shows the reaction when pretreatment is performed for hexavalent chromium, trivalent chromium, cardionium, lead, mercury, and arsenic.

TABLE 1

The waste mixed with the treatment agent is heated to high temperature by the heat of chemical reaction between calcium oxide and water and the heat of hydration due to the solidification effect. At the same time a part of the water in the waste evaporates, most of the water becomes crystalline water or hydrate, which reduces the water content of the waste. The mixing system is in a dry state in appearance. Wastes containing no hazardous substances can be treated in this state and can be reduced to soil or soil.

In the raw materials of the treatment agent of the present invention, mainly calcium aluminate and calcium sulfate were respectively [[Ca ₄ [Al (OH) ₆ ] ₂ · 24H ₂ O]] · (3SO ₄ ) · 2H ₂ O, or 3Ca · Al ₂ O ₃ · 3CaSO ₄ · 32H ₂ O to collect a large amount of water into the crystal water at the same time Al atoms in the compound is easily substituted with Ti, Cr, Mn, Fe and the like close to the ionic radius SO ₄ ^2- Is easily substituted with CrO ₄ ^2- , AsO ₃ ^2- AsO ₄ ^3-, and the like to effectively promote harmful metals.

In addition, the mixing system of the treatment agent and the waste has the capillary space present therein gradually warmed by the hydrate over time of the material and the structure of the discontinuous hydration curing agent becomes dense.

Due to the densification and the lack of free water due to the above-mentioned crystal water, the toxic metal is sealed and fixed inside the tissue without moving the voids inside the tissue of the hydration hardener.

In addition, the present invention has the alkalinity of saturation of calcium hydroxide by using the property that the solubility of the heavy metal in water is small on the alkali side to produce a poorly soluble compound in the alkaline region with a suitable pH and redox potential, and also the middle of the redox potential Because they try to maintain, heavy metals are extremely poorly soluble and are deposited inside solidified tissue.

The effect of the present invention will be described as follows.

The treatment agent of the present invention does not have strong acid, strong alkali, and does not contain harmful substances such as heavy metals, and thus is easy to handle, and in use, the treatment agent itself does not cause secondary pollution or contamination.

The treatment agent of the present invention and its treatment method can solidify or powder at the same time that can reliably fix harmful substances such as heavy metals, and thus simply ask the final treatment product, and handling is extremely simple.

In addition, the present invention can evaporate the water to be treated by the heat of reaction and the heat of hydration, so that it can be treated as it is without preliminary treatment to remove the water of the high water content, the water content is high or low, but a wide range Can be applied.

EXAMPLE

[Examples (1)-(4)]

The following raw materials (1)-(7) (7a) or (7b) are mixed in the ratio shown in Table 2, and the processing agent of this invention is obtained.

TABLE 2

Next, a method of treating various hazardous substance-containing wastes by using the treatment agents of Examples (1) to (4) shown in Table 2 is as follows.

[Example (5)]: Treatment of Dust Collected from High Carbon Waste Chromium Smelting Process

First, 5 kg of ferrous sulfate, 64.2%, 5 kg of sulfuric acid and 25 kg of water are added to dust (50 kg) containing harmful metals shown in Table 3, followed by pretreatment for 40 minutes by kneading and stirring.

In this pretreatment process, simultaneous hexavalent chromium (Cr ⁶⁺ ) that turns on dust is ^converted to trivalent chromium (Cr ³⁺ ). The sludge is added and mixed with the treatment agent of Example (1) and kneaded and stirred.

At this time, the addition amount of the treatment agent is 5 kg (addition rate 10% with respect to dust).

The pretreatment and kneading stirring described above used the stirrers shown in FIGS. 1 and 2.

The stirrer 1 is equipped with the long closed horizontal reaction cylinder 2, and the homper 3 which the opening was formed in the longitudinal direction on the upper surface is protruded.

One end of the groover 3 is formed with an inlet 4 for treatment, and the other part is an inlet 6 for sludge divided by a slant plate 5 and a diffusion chamber 7 for the treatment. Other cylindrical receiving barrels (8), spiral screw shafts (9), bulkheads (10), power motors (11) of screw shafts (9), and transverse sliding openings (12) are mounted. .

Moreover, in the reaction cylinder 2, the two rotating shafts 13 which protrude the stirring blades 14, respectively, are arranged side by side horizontally.

These rotation shafts are interleaved with gears 15 and 15, which rotate in engagement with one end thereof, so that both shafts 13 and 13 are reversely rotated. Moreover, inside the reaction cylinder 2, the plate-shaped fixed blade 17 which protrudes from the both sides 14a at the time of the rotation of the stirring blade 14 is protruded.

These stator blades 17 are fixed in a line in the longitudinal direction at a predetermined pitch to the opposite side walls 2a of the reaction cylinder 2. The bottom wall 2a of the reaction cylinder 2 is a lid 19 which can be opened downward by the cylinder 18. A water injection nozzle 20 for preliminary exothermic water supply and a conveying device 21 such as a belt conveyor or a screw conveyor are provided.

Dust (dust) is supplied from the inlet 4 of the ferrous sulfate and sulfuric acid stirrer 1 at a concentration of 64.2%, and water is supplied from the injection nozzle 20.

The supplied dust, ferrous sulfate, hoar acid and water are rotated by stirring the stirring blades 14 to be sufficiently stirred and mixed in the reaction vessel 2. Subsequently, the processing agent of Example (1) is supplied from the inlet 4 and stirred sufficiently.

At this time, the water and calcium oxide reacts to generate heat, and due to the rapid rise in temperature, the internal temperature of the treated product is about 100-150 ° C., thereby causing some exothermic drying. The mixed system becomes paste or mass with low fluidity, and the harmful metal solidifies therein and becomes harmless.

The cover 19 is then opened and taken out by the transport device 21 to a predetermined place and cured to promote solidification again. And at the end we bury the ground.

After 10 days of curing, the results of the elution of harmful metals are shown in Table 3.

And as a comparative example, the result of using the hydraulic cement (addition rate 17.6%) according to the standard about solidification of the waste containing metal by changing the processing agent of this Example is shown.

TABLE 3

As can be seen from Table 3, it can be seen that the fixing ability of the noxious metal by the treatment agent and the treatment method of the present invention is remarkably superior to that of the conventional cement.

In addition, the measurement of the amount of leaching was carried out by a test method such as a metal contained in industrial waste, and may be carried out by the following examples.

Example 6 Dust Collected by Electricity

50 kg of dust (dust) containing hazardous metal substances shown in Table 4 were treated without mixing with the treatment agent of Example (1). The addition rate of the processing agent at this time is 20%.

The stirrer 1 employ | adopted in Example (5) was used for mixing.

The treatment agent is supplied from the inlet 4 of the stirrer 1, and the screw side 9 is rotated so as to diffusely fall into the reaction vessel 2. A small amount of water is injected from the spray nozzle 20 of water to rotate the stirring blade 14 of the reaction vessel 2 to stir only the treatment agent. As a result, water and calcium oxide react to preheat and rapidly increase the temperature.

Then, raw materials (dust) are introduced into the reaction vessel 2 from the inlet 6, and the treatment agent and the dust collected are kneaded and agitated.

The internal temperature of the treatment agent at this time is about 100-150 ° C. Other operations were the same as in Example (5), and the elution amount at 10 days after curing was shown in Table 4. And as a comparative example, the result of having performed the same conditions using the hydraulic cement (addition rate of 17.6%) of Example 5 by changing the processing agent of Example 5 is shown in Table 4.

TABLE 4

Example 7 General Waste Dust Incinerator

50 kg of dust containing the harmful substances shown in Table 5 were mixed with the same treatment agent as in Example (2) without undergoing the pretreatment process as in Example (6). The leaching amount was measured at 7 days after curing, and the results are shown in Table 5. And the comparative example changed the processing agent of this Example like Example (6), and used hydraulic cement (20% of addition rate).

TABLE 5

[Example (8)]: Electric dust collection

50 kg of dust containing the harmful substances shown in Table 6 was mixed with the treatment agent (addition rate 15%) of Example (1) without undergoing pretreatment as in Example (6). The leaching amount was measured at 3 days after curing, and the results are shown in Table 6. And as a comparative example, the processing agent in this Example was changed like Example (6), and the hydraulic cement (addition rate 17.6%) was used.

TABLE 6

Example (9): Compound incinerator such as waste synthetic resin

50 kg of the incinerator containing harmful substances shown in Table 7 were mixed with the treatment agent of Example (4) as it was without undergoing the pretreatment process as in Example (6). The elution amount was measured 5 days after curing. The test table of the results is as shown in Table 7. And the comparative example changed the processing agent of this Example like Example (6), and used hydraulic cement (addition rate 17.6%).

TABLE 7

Example (10): Glaze Sludge

5 kg of aluminum sulfate is added to 50 kg of sludge containing noxious metals shown in Table 8, followed by stirring and mixing for 10 minutes. Add 0.5 kg of sodium lactate and knead again for 20 minutes. In this pretreatment process, most of the lead becomes lactic acid lead or emulsified lead and lead becomes poorly soluble compound. This sludge is mixed and kneaded with the treatment agent of Example (3). The addition amount of the treatment agent at this time is 5 kg (addition to the treated substance is 10%).

The mixing example uses the stirrer 1 used in Example (5), and sludge and aluminum sulfate are supplied from the inlet 4 of the stirrer. The stirring blade 14 is rotated and mixed sufficiently in the reaction vessel 2. Next, sodium lactate is added from the inlet 4 and the mixing is continued. Next, the processing agent of Example (3) is added from the inlet 4, and it fully stirs. At this time, water and calcium react to generate heat, and the temperature rises sharply, and thus the internal temperature of the treated product is 80-120 ° C., thereby causing some exothermic drying. After the addition of the treatment agent, the mixture is stirred for 30 minutes to solidify, and the harmful metal is encapsulated therein and becomes solid and harmless. Afterwards it is cured to promote solidification, and at last it is buried in the ground.

After 3 days of curing, the amount of toxic metals eluted was examined and the results are shown in Table 8. For comparison, the treatment agent of this example was changed as in Example (5), and the hydraulic cement addition rate was 17.6%).

TABLE 8

Example (11): Cyan Compound Waste Alkaline Liquid

To 50 kg of cyanide-containing waste liquid shown in Table 9, calcium hydroxide is added to make the pH 10 or more. 20 kg of sodium hypochlorite is added and stirred. After stirring for 20 minutes, ferrous lactate is added to bring the pH to 8-9 and stirred for 20 minutes. At this point, those decomposable in the cyan compound decompose. The processing agent of Example (2) is added and mixed with this decomposition liquid and stirred. The addition amount of the treatment agent is 50 kg (addition rate 100%). The pretreatment used the iron container, and the mixing example used the stirrer 1 employ | adopted in Example (5). Place the stock solution in an iron container, add calcium hydroxide and bring the pH to 10 or above. 20 kg of sodium hypochlorite is added while stirring. After stirring for 20 minutes to reach the reaction, ferrous sulfate was added to bring the pH to 8-9, followed by stirring for 20 minutes.

In the inlet 4 of the stirrer 1, 50 kg of the treating agent of Example 2 is added, and a small amount of water is added to rotate the stirring blades 14 to stir. Then water and calcium oxide react to generate heat. When the previously treated liquid is added in the inlet 4, the temperature rises, and the internal temperature of the treated product is 80-120 ° C., which causes some exothermic drying. After mixing with the treatment agent and stirred for 30 minutes, the solidified and undecomposed cyan component is sealed and sealed inside, making it harmless. Afterwards, it is cured to promote solidification and then disposed of.

The test result which detected the elution amount of cyan on the 7th day of curing is as Table 9 shown. And the comparative example changed the processing agent of an Example like Example (5), and used hydraulic cement (addition rate 17.6%) sand (addition rate 40%).

TABLE 9

Example 12 Factory Wastewater Dehydration

A pretreatment process is carried out as in Example (10) for 50 kg of Sraj containing zinc and oil shown in Table 10. Most of the zinc in this process consists of zinc sulfate and zinc sulfide. Subsequently, this process is performed as in Example 10. FIG. The treating agent uses Example (2). The addition amount is 10 kg (addition rate 20%). The internal temperature of the process at the time of exotherm is 80-100 degreeC. The dissolution is examined after 2 days of curing and the test results are shown in Table 10. And the hydraulic cement (20% of addition rate) was used for the comparison similarly to Example (5), changing the processing agent of this example.

TABLE 10

And the method of measuring the amount of oil leaching was examined by the inspection method regulation of oil contained in the waste.

Example (13): Hard chromium-plated hexavalent chromium-containing large

5 kg of ferrous lactic acid and 5 kg of lactic acid at a concentration of 64.2% were added to 50 kg of the sludge containing the harmful metals shown in Table 11 and stirred for 40 minutes. The operation is carried out as in Example (5) below. The treatment agent uses the treatment agent of Example (3) and uses the added amount of 15 kg (addition rate 30%). The internal temperature of the processed material at the time of invention is 80-120 degreeC. The leaching amount was examined after 7 days of curing, and the test results are shown in Table 11. And the hydraulic cement (addition rate 30%) was used for the comparison of the processing agent of this example like Example (5).

TABLE 11

Example (14): Mercury Compound Solution

50 kg of the mercury containing solution shown in Table 12 is pretreated as in Example (10). However, replace aluminum sulfate and use 25 kg of ferrous sulfate. Most of the mercury in this process is mercury sulfate and mercuric sulfate insoluble in water. Subsequently, this process is performed as in Example 10. FIG. The processing agent uses the processing agent of Example (3), and the addition amount uses 30 kg (addition rate 60%). The internal temperature of the processed material in the exothermic treatment is 120-140 ° C. The leaching amount was examined after 7 days of curing, and the test results are shown in Table 12.

And the comparative example used the hydraulic cement (addition rate 20.0%) and sand (addition rate 40%) by changing the processing agent of this Example like an Example.

TABLE 12

[Example (15)]: PCB mixing transformer cooling oil

The trans cooling oil containing the hazardous substances shown in Table 13 was treated as it was mixed with the treatment agent of Example (1) without undergoing the pretreatment process as in Example (6). The addition rate of the processing agent at this time was 200%, and the elution amount was measured on the 7th day after cherry tree. The test results are shown in Table 13.

And the comparative example used the hydraulic cement (30% of addition rule) and sand (addition rate 40%) by changing the processing agent of this example like Example (6).

TABLE 13

In Examples (5) to (15) above, it can be seen that the treatment agent and the treatment method of the present invention have a much improved ability to fix harmful substances compared with the conventional solidification method by cement hardening.

Example 16 Treatment of Imported Fruit (Grape, Lemon, Orange, etc.)

In the disposal of the imported fruit defectives, 50 kg of crushed fruit was mixed with the treatment agent of Example (3) as it was without pretreatment and treated as in Example (6). At this time, the addition amount of the treatment agent is 10 kg (addition rate 20%).

The moisture content was measured on the 3rd day of curing and the results are shown in Table 14. As in Comparative Example and Example (6), hydraulic cement (addition rate of 20%) was used by changing the treatment agent of this example.

TABLE 14

Example (17): Agricultural waste (treatment of bean sprouts, radish leaves, cabbages, onions, potatoes)

In the processing of discarding the defective agricultural products, the agricultural products were shredded and treated as in Example (6) using the treatment agent of Example (3) as it was without pretreatment. The addition amount of the additive is 5 kg (addition rate 10%).

The moisture content was measured on the third day of curing and the results are shown in Table 15.

And the comparative example changed the processing agent of this Example like Example (6), and used hydraulic cement (20% of addition rate). Even on the third day of curing, corruption proceeded without solidification.

TABLE 15

In order to solidify these agricultural wastes without curing, the addition amount of the treatment agent requires 20 kg or more (addition rate of 40% or more), but it is preferable to solidify the curing as in the present embodiment in order to be crushed and reused and used as a soil improving agent or feed. However, it is almost decaying in the pretreatment, and there is a bad smell during curing, and it is necessary to solidify the treatment without curing by adding the amount of the treatment agent to 50% or more.

Example (18): Treatment of Fish Bone, Dead Fish

50 kg of fish guts and the like in the carcass processing plant of fish were treated in the curing fishery as in Example (6) using the treatment agent of Example (4) without pretreatment. At this time, the addition amount of the treatment agent is 5 kg (addition rate 10%). The problem here is that the amount of added water is almost fat in dead fish and the water is low, so if the amount of water sprayed is not enough heat is generated and the exothermic temperature continues at 50-70 ° C. Add 2-3 kg of powder. Then, the temperature becomes 90-100 ° C., and the decomposition of the shell is completed. The water content was measured on the second day of curing. The results are shown in Table 16. And the comparative example used the hydraulic cement (addition rate 15%) by changing the treatment agent of this example as in Example (6), but even on the second day of curing, it was not solidified enough to decay.

TABLE 16

[Example (19)] Treatment of floating maintenance of various juices

Example (6) and using the treatment agent of Example (4) as it is without pretreatment of 50 kg of the suspended fat from boiled fish for degreasing such as fish gut or bone fish and the leftover blood and head, neck and leg intestines Treated together. The addition amount of the processing agent at this time is 10 kg (addition rate 20%). The exothermic temperature is continued at 60-70 ° C, but when 2-5 kg of aluminum sulfate powder (addition rate 4-10%) is added as a preparation for exothermic solidification at the last step, the temperature becomes 90-100 ° C, resulting in decomposition of the processed product. It is completely made and solidified.

The moisture content was measured on the 4th day of curing and the test results are shown in Table 17. In Comparative Example, as in Example 6, the treatment agent of the present example was changed and treated with hydraulic cement (addition rate of 20%). However, even on the fourth day of curing, the rot proceeded without sufficiently solidifying.

TABLE 17

Example (20): Processing of Livestock Powder (1)

50 kg of the total powder was treated in the same manner as in Example (6) using the treatment agent of Example (2) as it was without pretreatment. The poultry itself has a tendency to solidify, but its properties vary depending on the type of feed, the time of winter and summer, and the fermentation conditions. For this reason, although the addition amount of a treatment agent also changes, it is generally preferable to process the flour for 1-2 days after excretion. In this case, the addition amount of the treating agent is 4-5 kg (addition rate 8-10%). The exotherm temperature is continued at 80-90 ° C.

The moisture content was measured on the 4th day of curing, and the results are shown in Table 18. The comparative example was carried out with hydraulic cement (addition rate 20%) by changing the treatment agent of this example as in Example (6), but fermentation proceeded with odor and not sufficiently solidified even on the fourth day of curing.

TABLE 18

The processed powder can be effectively used as a lime fertilizer or a form meter.

[Example (21)]: Livestock meal (2) Treatment of livestock meal such as pigs, cattle, ducks

Pig manure and copper wash water, cow manure and a mixture of copper wash water and duck manure are always above 90% water content. These manures are treated in the same manner as in Example (6) using the treatment agent of Example (2) without performing pretreatment. The characteristics of the manure vary depending on the type of feed, winter season, fermentation conditions, and water content, but generally it is preferable to treat the one or two days after excretion with less fermentation. Addition rate 10-20%). The exotherm temperature is continued at 90-100 ° C.

The moisture content was measured on the 4th day of curing. The results are as shown in Table 19. The comparative example was carried out with hydraulic cement (addition rate 20%) by changing the treatment agent of the present example as in Example (6), but the fermentation proceeded with odor without a solidification even on the fourth day of curing.

TABLE 19

Example (22): activated sludge, dewatered cake treatment

After the manure treatment, sludge and dehydrated cakes do not rot and remain intact after a month. In addition, the dewatering cake of sewage sludge, which processes batches of rain, rain, urban sewage, and factory wastewater, is a micro sludge, which causes rot, odor, and fermentation. All of them have a water content of more than 85%. 50 kg of these sewage sludges were treated in the same manner as in Example (6) using the treatment agent of Example (4) as it was without pretreatment. The addition amount of the treatment agent at this time is 7.5kg (addition rate 15%) and the internal temperature of the treatment is continued at 100-120 ℃. The moisture content was measured on the 7th day of curing, and the results are shown in Table 20. In Comparative Example, the treatment agent of the present Example was changed to the hydraulic cement (addition rate of 20%) as in Example (6), but the fermentation was proceeding with a odor without being sufficiently solidified even on the seventh day of curing.

TABLE 20

Cured solids can be used as fuel or lime fertilizer.

[Example (23)]: Treatment of human manure and general household septic tank sludge

Incineration is usually used for treatment of manure septic tank sludge, but it is difficult to establish and replace incinerators due to the problem of odor and it is also difficult to throw them on the floor. Phosphorus manure and sludge are crushed by a crusher and filtered and coagulated strongly by adding a polymer coagulant in a coagulation sedimentation tank. It is made into a dewatered cake dehydrated up to 80% by a high performance screw press.

50 kg of the dewatering cake was treated as in Example (6) using the treatment agent of Example (4) as it was. The addition amount of the treatment agent at this time is 15 kg (addition rate 30%) and the internal temperature of the treatment product is 90-110 ° C. The moisture content was measured on the 7th day of curing, and the results are shown in Table 21. And the comparative example was changed to the hydraulic cement (addition rate of 30%) by changing the treatment agent of the present embodiment as in Example (6), but the fermentation proceeded with a odor and not sufficiently solidified even on the seventh day of curing.

TABLE 21

Cured and solidified can be used as fertilizer or fuel.

Example (24): Treatment of shellfish attached to the stomach

Sea shellfish attached to the bottom of the sea is badly odor. 50 kg of shellfish such as shellfish were treated in the same manner as in Example (6) using the treatment agent of Example (4) as it was. The addition amount of the treatment agent is 20 kg (addition rate 40%). The internal temperature of the treatment continues at 90-110 ° C. It is completely powdered and has little odor. The moisture content was measured on the second day of curing and the results are shown in Table 22.

Comparative Example was treated with hydraulic cement (addition rate 40%) by changing the treatment agent of the present embodiment as in Example (6), but on the second day of the birthday it was not sufficiently solidified and bad smell.

Table 22

The treated product can be used as a feed for chickens.

The above-described embodiments (16) to (24) are those which have a high water content, which are easily perishable, but are removed by evaporation of water by treatment with the treatment agent of the present invention, and the remaining water becomes crystal water. Appearance is like a powder of a dried thing, and handling is very easy. It is also susceptible to sterilization at high temperatures during processing, so that there is no decay odor and it can be reduced in the soil.

[Comparative Example]

The treatment agent (comparative example) of the compounding composition shown in Table 23 and the treatment agent of Examples (1)-(4) were compared with the stirrer (1) used in the said Example about the treatment ability with respect to waste.

The sludge waste used here is activated sludge with 65% moisture.

Sludge was treated by mixing with a treating agent as it is without going through a pretreatment step as in Example (6). The addition rate of the processing agent at this time is 20%. Table 24 shows the results of measuring the internal temperature of the mixing system when the treatment agent and sludge are mixed.

TABLE 23

TABLE 24

As can be seen from Table 24, the comparative treatment agent has a very low internal temperature of the mixed system compared to the treatment agents of (1)-(4), so that the moisture of the treatment product does not evaporate, which is why waste or harmful substances of high moisture content of the treatment agent of the comparative example are treated. While the treatments requiring heat for immobilization have no treatment capacity, Examples (1) to (4) have high internal temperatures and can sufficiently evaporate or heat moisture to effectively treat the above wastes. Have the ability.

Claims (1)

40.0-56.0 parts by weight of quicklime powder containing 95% or more of calcium oxide, 5.0-14.0 parts by weight of clay clay powder containing 53% or more of calcium oxide and 30% or more of silicon dioxide Talcum powder containing 35% or more of silicon and 30% or more of magnesium oxide, 3.5-6.5 parts by weight, lime carbonate powder containing 50% or more of calcium oxide, 12.5-18.0 parts by weight of silicon dioxide, 76% or more of silicon dioxide and 14% or more of aluminum oxide 1.0-3.0 parts by weight of clay powder: 1.0-11.0 parts by weight of calcium aluminate powder containing 50% or more of aluminum oxide, 30% or more of calcium oxide, and 5-11.5% by weight of powder containing 50% or more of sulfur trioxide. Waste treatment method characterized in that the mixed with the waste to dehydrate.

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