JPS6324427B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a waste treatment agent and a treatment method thereof. In recent years, the amount of waste generated as a result of industrial and daily life activities has exceeded the limits of natural purification, and the above-mentioned measures are needed to ensure smooth material circulation between the natural environment and the living environment. There is an urgent need to dispose of waste. In the present invention, waste refers to those discharged as a result of industrial activities and daily life activities, including incineration ash of various wastes,
Sludge, all waste oils related to mineral oils and animal and vegetable oils, waste acids, waste alkalis, various organic and inorganic waste liquids, animal and plant residues, fruits and fish for disposal, various mine slags, household manure, human waste and human waste. These are septic tank sludge, pollutants, and bottom sludge from rivers, rivers, lakes, ponds, and oceans. Among these wastes, those containing one or more types of hazardous substances such as organic chlorine compounds such as PCBs, organic phosphorous compounds, cyanide compounds, and toxic metals are particularly referred to as hazardous substance-containing wastes. (Prior Art) Conventionally, various methods have been used to treat waste. Especially for waste containing harmful substances, there are chemical treatment methods that make them harmless through chemical reactions,
Or, it was treated by solidification method using cement. Chemical treatment here is, for example, reducing hexavalent chromium (Cr ⁶⁺ ) with acidic sodium sulfite in acidic sulfuric acid to convert it into trivalent chromium (Cr ³⁺ ), and cement solidification is the process of reducing the amount of chromium (Cr 6+ ) that cement has. Harmful substances are immobilized in cement during cement solidification due to the hydroxide precipitation effect and ion adsorption effect in alkaline conditions. However, chemical treatment methods are always associated with the risk of secondary pollution, so the treatment operations are extremely troublesome, and cement solidification methods are easy to treat, but they contain harmful substances. There is a limit to the immobilization function of cadmium, lead,
Conventional treatment methods have not yet been sufficient, as it is extremely difficult to suppress the elution of harmful substances other than arsenic to within an acceptable range. (Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned circumstances, and has a simple cement solidification process and has a better immobilization function for harmful substances than cement. It is an object of the present invention to provide a novel waste treatment agent and its treatment method that can be applied not only to waste containing hazardous substances but also to other wastes. (Means for solving the problem) The waste treatment agent according to the present invention is a quicklime powder.
40.0~56.0 parts by weight, magnesium silicate lime powder 5.0~14.0
Parts by weight, 3.5 to 6.5 parts by weight of talcum powder, lime carbonate powder
12.5-18.0 parts by weight, clay powder 1.0-3.0 parts by weight,
9.0 to 11.0 parts by weight of calcium aluminate powder and 8.5 to 11.5 parts by weight of powder containing 50% by weight or more of sulfur trioxide
It is characterized by containing parts by weight. Further, the waste treatment method according to the present invention is characterized in that the above-mentioned treatment agent and the waste to be treated are mixed and dehydrated and powdered. Hereinafter, the present invention will be specifically explained based on Examples. (Function) Each raw material used in the present invention has the following component specifications, for example.

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[Table] (7) Powder containing 50% by weight or more of sulfur trioxide (e.g., anhydrous aluminum sulfate or calcined gypsum)

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[Table] The processing agent of the present invention is the above (1) to (7) (7a or 7b).
It can be obtained by mixing the raw materials in the required ratio. Next, a method for treating waste using the above-mentioned treatment agent will be explained. The waste is mixed with the treatment agent of the present invention after being pretreated or as it is without undergoing a pretreatment step. This pretreatment process converts harmful metals into poorly soluble compounds that are difficult to dissolve in water. Table 1 shows the reactions of hexavalent chromium, trivalent chromium, cadmium, lead, mercury, and arsenic in the pretreatment step.

[Table] The waste mixed with the treatment agent reaches a high temperature due to the heat of chemical reaction between calcium oxide and water and the heat of hydration accompanying solidification, and while some of the water in the waste evaporates, most of the water is removed. It turns into crystal water and hydrates, lowering the moisture content of the waste, and the mixed system appears dry. Waste that does not contain harmful substances is completely processed in this state, and can be returned to the soil as soil. Further, among the raw materials for the treatment agent of the present invention, calcium aluminate and _calcium sulfate are mainly [[Ca ₄ [Al(OH) ₆ ] 2.24H ₂ O(3SO ₄ ).
2H ₂ O or 3Ca・Al ₂ C ₃・3CaSO ₄・32H ₂ O and captures a large amount of water as crystal water,
The Al atom in the above compound has a similar ionic radius to Ti,
It easily replaces Cr, Mn, Fe, etc., and SO ^2- ₄
It easily replaces CrO ^2- ₄ , AsO ^2- ₃ , AsO ^3- ₄ , etc., and both of these effectively capture harmful metals. In addition, in the mixed system of processing agent and waste, the capillary spaces existing inside the system are gradually filled with hydrates as the material ages, and the discontinuous hydrated material structure becomes dense. Due to this densification and the absence of free water due to the above-mentioned crystallization water, harmful metals are confined and immobilized within the structure of the hydrated material without moving through the voids within the structure. Furthermore, the present invention maintains the alkalinity of calcium hydroxide saturation by utilizing the property that the solubility of heavy metals in water decreases on the alkaline side and generates extremely sparingly soluble compounds in the alkaline region where the pH and redox potential are appropriate. Since the oxidation-reduction potential is also maintained at a moderate level, heavy metals can always be deposited in the solidified structure as extremely sparingly soluble substances. (Effects of the present invention) The treatment agent of the present invention does not exhibit strong acid or strong alkali, and does not contain harmful substances such as heavy metals, so it is not only easy to handle, but also the treatment agent itself There is no secondary pollution (pollution) caused by this. The treatment agent of the present invention and the treatment method using the treatment agent can reliably immobilize harmful substances such as heavy metals, and are ultimately solidified or powdered, so that the final treatment product can be All you have to do is fill it in, and it is extremely easy to remove. Furthermore, since the present invention can be expected to evaporate the water content of the object to be treated using the heat of reaction and the heat of hydration, it is possible to treat the object containing high moisture as it is without performing any preliminary treatment to remove water. It can be applied to a wide range of conditions, from low moisture to high moisture. (Examples) Examples 1 to 4 The above raw materials (1) to (7), 7a or 7b) were mixed in the proportions shown in Table 2 to obtain the processing agent of the present invention.

[Table] Next, methods for treating various wastes containing harmful substances using the treating agents of Examples 1 to 4 shown in Table 2 will be described. Example 5 Treatment of collected dust generated in the high carbon ferrochrome smelting process First, for raw dust (50 kg) containing harmful metals shown in Table 3, 5 kg of ferrous sulfate and 5 kg of sulfuric acid with a concentration of 64.2% , and 25 kg of water, and perform pretreatment by kneading and stirring for 40 minutes. In this pretreatment step, the dust turns into sludge and hexavalent chromium (Cr ⁶⁺ ) changes to trivalent chromium (Cr ³⁺ ). Example 1
The processing agent is added and mixed, and the mixture is kneaded and stirred. The amount of processing agent added at this time was 5 kg (addition rate to dust).
10%). The above pretreatment and kneading/stirring were performed using the stirrer 1 shown in FIGS. 1 and 2. The stirrer 1 has a long, closed, horizontal reaction case 2, the upper surface of which is open in the longitudinal direction, and a hopper 3 is connected thereto. Hotupa 3
A processing agent inlet 4 is formed at one end, and the other portion is a sludge inlet 6 and a processing agent diffusion chamber 7, which are divided into two by a partition plate 5. Others include a gutter-shaped receiving case 8, a spiral screw shaft 9, a partition wall 10, a power motor 11 for the screw shaft 9, and an opening/closing plate 12 that can be slid laterally.
is installed. Furthermore, rotating shafts 13, 13 on which stirring blades 14 are protruded are horizontally suspended within the reaction case 2. A gear 1 that meshes with each other is attached to one end of these rotating shafts 13, 13.
5 and 15 are attached, and both shafts 13 and 13 rotate in opposite directions. Furthermore, plate-shaped fixed blades 17 are provided inside the reaction casing 2 so that the stirring blades 14 approach each other at side surfaces 14a during rotation thereof. The fixed blades 17 are fixed to the opposing side walls 2a, 2a of the reaction case 2 in a line in the longitudinal direction at a predetermined pitch. Note that the bottom wall 2b of the reaction case 2 is a lid 19 that can be opened downward by a cylinder 18. A water injection nozzle 20 for preheating water supply and a conveying device 21 such as a belt conveyor or a screw conveyor are also attached. Raw dust, ferrous sulfate and 64.2% sulfuric acid are supplied from the inlet 4 of the stirrer 1, and water is supplied from the water injection nozzle 20. supplied raw dust,
Ferrous sulfate, sulfuric acid, and water are sufficiently stirred and mixed in the reaction chamber 2 by rotating the stirring blade 14. Next, the processing agent of Example 1 was supplied through the inlet 4 and thoroughly stirred. At this time, water and calcium oxide react to generate heat, the temperature rises rapidly, and the temperature inside the treated material reaches approximately 100 to 150°C, resulting in partial evaporation drying. The mixed system becomes paste-like or dumpling-like with low fluidity, and harmful metals are sealed inside and solidified to become harmless. Thereafter, the lid 19 is opened and the material is transported to a predetermined location using the transport device 21, cured to further promote solidification, and finally disposed of in a landfill. After 10 days of curing, the amount of toxic metals eluted was examined and the results shown in Table 3 were obtained. As a comparative example, instead of the processing agent of this example,
The results are shown in the same manner using hydraulic cement (addition rate 17.6%) in accordance with the standards for solidification of wastes containing metals, etc. (Revised Announcement 57 of 1982).

[Table] As can be seen from Table 3, the ability of the treatment agent and treatment method of the present invention to fix harmful metals is significantly superior to that of the conventional fixation method using cement. The method for measuring the elution amount was based on the ``Method for testing metals, etc. contained in industrial waste'' (Environment Agency Notification No. 13, dated February 17, 1971). The same applies to the embodiments described below. Example 6 Electric furnace collected dust Raw dust containing harmful substances shown in Table 4 (50
Kg) was treated by mixing it with the treatment agent of Example 1 without undergoing any pretreatment process. At this time, the addition rate of the processing agent was 20%. For mixing, the stirrer 1 used in Example 5 was used. The processing agent is supplied to the inlet 4 of the stirrer 1, and the screw shaft 9 is rotated to diffuse and fall into the reaction chamber 2. A small amount of water is injected from the water injection nozzle 20 to rotate the stirring blade 14 in the reaction case 2 to stir only the processing agent. As a result, water and calcium oxide react with each other, causing preliminary heat generation and a rapid rise in temperature. Thereafter, the raw dust is introduced into the reaction case 2 through the sludge inlet 6, and the treatment agent and the raw dust are mixed and stirred. At this time,
The temperature inside the processed material is approximately 100 to 150°C. The other operations were the same as in Example 5. Table 4 shows the elution amount on the 10th day after curing. As a comparative example, instead of the processing agent of this example,
Table 4 shows the results obtained by using the hydraulic cement of Example 5 (addition rate: 17.6%) and using the same conditions except for the same conditions.

[Table] Example 7 General waste and garbage incineration ash Raw dust containing the hazardous substances shown in Table 5 (50
Kg) was treated by mixing it with the treatment agent of Example 2 without going through the pretreatment process in the same manner as in Example 6. The elution amount was measured on the 7th day after curing. The results are shown in Table 5. In addition, in the comparative example, similar to Example 6, hydraulic cement (addition rate 20%) was used in place of the treatment agent of this example.

[Table] Example 8 Electric furnace dust collection Raw dust containing harmful substances shown in Table 6 (50
Kg) was treated by mixing it with the treatment agent of Example 1 (addition rate: 15%) without going through the pretreatment process in the same manner as in Example 6. The amount of elution was measured on the third day after curing. The results are shown in Table 6. In addition, in the comparative example, similar to Example 6, hydraulic cement (addition rate 17.6%) was used in place of the treatment agent of this example.

[Table] Example 9 Incineration ash of chemicals such as waste plastics Raw incineration ash containing the hazardous substances shown in Table 7 (50
Kg) was treated by mixing it with the treatment agent of Example 4 without going through the pretreatment process in the same manner as in Example 6. The elution amount was measured on the 5th day after curing. The results are shown in Table 7. In addition, in the comparative example, similar to Example 6, hydraulic cement (addition rate 17.6%) was used in place of the treatment agent of this example.

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[Table] Example 10 Glaze sludge Raw sludge containing toxic metals shown in Table 8 (50
Add 5 kg of aluminum sulfate per kg) and stir and mix for 10 minutes. Add 0.5Kg of sodium sulfide and knead for a further 20 minutes. In this pretreatment process, most of the lead is converted into lead sulfate and lead sulfide, and lead becomes a poorly soluble compound. The treatment agent of Example 3 is added to and mixed with this sludge, and the mixture is kneaded and stirred. The amount of processing agent added at this time is 5 kg.
(Addition rate to dust: 10%). For mixing, the stirrer 1 used in Example 5 was used. Raw sludge and aluminum sulfate are inlet 4 of the agitator.
Supplied from. The stirring blades 14 are rotated to thoroughly mix the mixture inside the reaction chamber 2. Next, sodium sulfide is added through the inlet 4 and mixed continuously. Then, the processing agent of Example 3 was added through the inlet 4 and thoroughly stirred. At this time, water and calcium oxide react,
Heat is generated, the temperature rises rapidly, and the temperature inside the processed material reaches 80 to 120°C, and some of the material is evaporated and dried.
After adding the processing agent, stir for 30 minutes until it becomes solidified, and the harmful metals are sealed inside, solidifying and rendering them harmless. It is then drained and cured to further promote solidification.
Finally, the amount of harmful metals eluted after 3 days of curing before disposal at a landfill was examined, and the results are shown in Table 8. In the comparative example, similar to Example 5, hydraulic cement (addition rate: 17.6%) was used in place of the treatment agent of this example.

[Table] Example 11 Cyanide compound waste alkaline solution Calcium hydroxide is added to the cyanide-containing waste solution (50 kg) shown in Table 9 to adjust the pH to 10 or higher. Add 20 kg of sodium hypochlorite and stir.
After stirring for 20 minutes, add ferrous sulfate to adjust the pH to 8-9 and stir for 20 minutes. At this point, the decomposable cyanide compounds are decomposed. The processing agent of Example 2 is added to and mixed with this decomposition liquid, and the mixture is stirred. The amount of processing agent added was 50 kg (addition rate was 100%). An iron container was used for pretreatment, and the stirrer 1 used in Example 5 was used for mixing. Place the stock solution in an iron container and add calcium hydroxide to adjust the pH to 10 or higher. Add 20 kg of sodium hypochlorite while stirring. After stirring for 20 minutes to carry out the reaction, ferrous sulfate was added to adjust the pH to 8-9, and the mixture was stirred for an additional 20 minutes. 50 kg of the processing agent of Example 2 was added from the inlet 4 of the stirrer 1.
is added, a small amount of water is added, and the stirring blades 14 are rotated to stir the water and calcium oxide to react with each other and generate heat. Add the treated liquid from input port 4. The temperature rises and the temperature inside the processed material reaches 80-120
℃, and some evaporation drying takes place. After mixing with the processing agent, it is stirred for 30 minutes to solidify, and the undecomposed cyanide is sealed inside, making it immobilized and harmless. It is then discharged, cured to further promote solidification, and then disposed of. After 7 days of curing, the amount of cyanide eluted was examined and the results are shown in Table 9. In the comparative example, similar to Example 5, hydraulic cement (addition rate: 17.6%) and sand (addition rate: 40%) were used instead of the treatment agent of this example.

[Table] Example 12 Factory waste liquid dehydrated cake sludge Sludge containing zinc and oil shown in Table 10 (50
Kg) is subjected to the same pretreatment process as in Example 10. In this process, most of the zinc is converted to zinc sulfate and zinc sulfide. Subsequently, this process is performed in the same manner as in Example 10. The treatment agent used in Example 2 was added in an amount of 10 kg.
(addition rate 20%) is used. The temperature inside the treated product during exothermic generation is 80 to 100°C. Inspection of elution amount is curing 2
The results are shown in Table 10. In the comparative example, similar to Example 5, hydraulic cement (addition rate 20.0%) was used instead of the treatment agent of this example.

[Table] The method for measuring the amount of oil eluted was in accordance with the ``Method for Verifying Oil Contained in Industrial Waste'' (Environment Agency Notification No. 3, Kansuikan No. 120, dated February 27, 1976). Example 13 Hard chrome plating Sludge containing hexavalent chromium Sludge containing the toxic metals shown in Table 11 (50
Kg), similar to Example 5, ferrous sulfate 5Kg
Add 5 kg of 64.2% sulfuric acid and stir for 40 minutes. Hereinafter, the same operations as in Example 5 are performed. The treatment agent used in Example 3 was used, and the amount added was 15 kg (addition rate 30%). The temperature inside the treated product during exothermic generation is 80 to 120°C. The elution amount was tested 7 days after curing, and the results are shown in Table 11. In the comparative example, similar to Example 5, hydraulic cement (addition rate: 30%) was used instead of the treatment agent of this example.

[Table] Example 14 Mercury compound solution For the mercury-containing solution (50Kg) shown in Table 12,
The same pretreatment as in Example 10 is performed. However, 25 kg of ferrous sulfate is used instead of aluminum sulfate. In this process, most of the mercury becomes mercury sulfate and mercury sulfide, which are sparingly soluble in water. Subsequently, this process is performed in the same manner as in Example 10. Example 3 was used as the processing agent, and the amount added was
Use 30Kg (addition rate 60%). The temperature inside the treated product during exothermic generation is 120 to 140°C. The elution amount was tested 7 days after curing, and the results are shown in Table 12. In the comparative example, similar to the example, hydraulic cement (addition rate: 20.0%) and sand (addition rate: 40%) were used instead of the treatment agent of the present example.

[Table] Example 15 PCB-containing transformer cooling oil The transformer cooling oil containing the harmful substances listed in Table 13 was mixed with the treatment agent of Example 1 without going through the pretreatment process as in Example 6. and processed it. The addition rate of the processing agent at this time was 200%.
The elution amount was measured on the 7th day after curing. The results are shown in Table 13. In addition, in the comparative example, similar to Example 6, hydraulic cement (addition rate: 30%) and sand (addition rate: 40%) were used instead of the treatment agent of this example.

[Table] In the above Examples 5 to 15, it was understood that the treatment agent and treatment method of the present invention further improved the ability to fix harmful substances compared to the conventional cement solidification method. Example 16 Treatment of imported fruits (grapefruit, lemon, orange, etc.) When disposing of defective imported fruits, the slurry (50 kg) obtained by crushing the fruits was directly treated with the treatment agent of Example 3 without going through the pretreatment process. and treated in the same manner as in Example 6. The amount of processing agent added at this time is 10 kg.
(addition rate is 20%). The moisture content was measured on the third day of curing. The results are shown in Table 14. In the comparative example, similar to Example 6, hydraulic cement (addition rate: 20%) was used instead of the treatment agent of this example.

[Table] Example 17 Processing of agricultural waste (soybean sprouts, radish leaves, cabbage, onions, potatoes) Regarding the disposal of defective agricultural products, the slurry (50 kg) made by crushing agricultural products is processed in the pre-treatment process. The treatment was carried out in the same manner as in Example 6 using the treatment agent of Example 3 without further treatment. The amount of processing agent added at this time is 5 kg.
(addition rate 10%). The moisture content was measured on the third day of curing. The results are shown in Table 15. In addition, in the comparative example, similar to Example 6, hydraulic cement (addition rate 20%) was used instead of the treatment agent of this example. Even on the third day of curing, it did not harden and rot progressed.

[Table] In order to solidify agricultural waste such as this without curing, it is necessary to add more than 20 kg of processing agent (addition rate of more than 40%), but it can be crushed for reuse and used as soil conditioner or feed. It is desirable to cure and solidify as shown in this example, but if the product is already rotten before treatment, the odor will be strong even during curing. It is necessary to solidify it. Example 18 Processing of fish iliac bones/fish carcasses Fishery iliac bones/fish carcasses (50 kg) such as yellowtail carcasses from aquaculture farms and fish guts (50 kg) from fish processing plants are treated in their original state without undergoing any pre-treatment process. Then, the same treatment as in Example 6 was carried out using the treatment agent of Example 4. The amount of treated material added at this time was 5 kg (addition rate 10%). The problem here is that the amount of water added makes it difficult to generate enough heat because fish carcasses are mostly fat and contain little water. The fever temperature is 50-70
At the final stage, 2 to 3 kg of aluminum sulfate powder is added as an exothermic solidification aid, and the temperature reaches 90 to 100°C, completing the decomposition of fish meat, skin, etc. The moisture content was measured on the second day of curing. The results are shown in Table 16. The comparative example is Example 6.
Similarly, hydraulic cement (addition rate: 15%) was used instead of the treatment agent of this example, but sufficient solidification was not obtained even on the second day of curing, and decay progressed.

[Table] Example 19 Treatment of scum (surfacing oil and fat) from various broths Fish iliac bones, fish bodies, and blood when dissecting broilers,
The scum (50 kg) of broth for defatting the head, neck, legs, internal organs, etc. was treated in the same manner as in Example 6 using the treatment agent of Example 4 without going through the pretreatment process. The amount of processing agent added at this time is 10 kg (addition rate 20
%). The exothermic temperature continues at 60-70℃,
At the final stage, when 2 to 5 kg of aluminum sulfate powder (addition rate of 4 to 10%) is added as an exothermic solidification aid, the temperature reaches 90 to 100°C, and the treated product is completely decomposed and solidified rapidly. The moisture content was measured on the fourth day of curing. The results are shown in Table 17. In addition, in the comparative example, similar to Example 6, hydraulic cement (addition rate 20%) was used instead of the treatment agent of this example, but sufficient solidification was not obtained even on the 4th day of curing, and rotting occurred. progressed.

[Table] Example 20 Farmed Manure (1) Treatment of Chicken Manure Chicken manure (50 kg) was treated in the same manner as in Example 6 using the treatment agent of Example 2 without going through the pretreatment process. Chicken manure itself has a tendency to solidify, but its properties vary depending on the type of feed, the season of summer and winter, and the degree of fermentation. Therefore, the amount of treatment agent added varies, but it is generally desirable to treat feces on the first to second day after excretion, and in this case the amount of treatment agent added is 4 to 5 kg (addition rate 8 to 10%). . The exothermic temperature continues at 80-90℃. The moisture content was measured on the fourth day of curing. The results are shown in Table 18. In the comparative example, similar to Example 6, hydraulic cement (addition rate 20
%), but sufficient solidification was not obtained even on the 4th day of curing, and a bad odor remained and fermentation progressed.

[Table] Chicken manure treated in this way can be effectively used as lime fertilizer or soil conditioner. Example 21 Livestock dung (2) Treatment of dung from pigs, cows, and domestic ducks Pig dung (mixture of dung and urine and washing water), cow dung (mixture of dung and urine using a flowing system), and duck dung (in the case of dung and urine) ) all have a moisture content of 90% or more. This kind of manure can be processed without going through any pre-treatment process.
It was treated in the same manner as in Example 6 using the treatment agent of Example 2 as it was. The properties of manure vary depending on the type of feed, the season of summer and winter, the degree of fermentation, and the water content, but it is generally preferable to treat manure that has undergone less fermentation and is 1 to 2 days old after excretion. The amount of processing agent added is 5 to 10 kg (addition rate 10 to 20%). The exothermic temperature continues at 90-100℃. The moisture content was measured on the fourth day of curing. The results are shown in Table 19. The comparative example is similar to Example 6,
Hydraulic cement (addition rate 20%) was used instead of the treatment agent of this example, but sufficient solidification was not achieved even on the 4th day of curing, a bad odor remained, and fermentation progressed.

[Table] Example 22 Treatment of activated sludge and dehydrated cake Digested sludge and dehydrated cake treated with only human feces and human urine do not rot and remain in that state for even one month. In addition, the dehydrated cake of sewage sludge obtained by collectively processing human excrement, rainwater, city sewage, factory waste liquid, etc. is undigested sludge, so it rots, releases a bad odor, and begins to ferment. All have a moisture content of 85% or more. This sewage sludge (50Kg) was treated in Example 6 using the treatment agent of Example 4 without undergoing any pretreatment process.
processed in the same way. When the amount of processing agent added is 7.5 kg (addition rate: 15%), the temperature inside the treated product continues at 100 to 120°C. The moisture content was measured on the 7th day of curing. The results are shown in Table 20. In the comparative example, similar to Example 6, hydraulic cement (addition rate 20
%), but sufficient solidification was not obtained even on the 7th day of curing, and a bad odor remained and fermentation progressed.

[Table] After curing and solidification, it is used as fuel and lime fertilizer. Example 23 Treatment of raw human excreta and septic tank sludge The incineration method is generally used for direct treatment of raw human excreta and septic tank sludge, but it is difficult to install new incinerators due to the problem of bad odor, and it is difficult to dispose of it in the ocean. is becoming increasingly difficult. Human waste and sludge are crushed in a crusher, filtered, and strongly coagulated in a coagulation and sedimentation tank by adding a polymeric coagulant. Make a dehydrated cake with 80% dehydration using a high-performance screw press. This dehydrated cake (50 kg) was treated in the same manner as in Example 6 using the treatment agent of Example 4. When the amount of processing agent added is 15 kg (added amount: 30%), the temperature inside the treated product is 90 to 110°C. Measurement of moisture content is carried out at curing 7.
I went on the first day. The results are shown in Table 21. In the comparative example, similar to Example 6, hydraulic cement (addition rate 30%) was used instead of the treatment agent of this example, but sufficient solidification was not obtained even on the 7th day of curing, a bad odor remained, and fermentation progressed.

[Table] After curing and solidification, it is used as fertilizer and fuel. Example 24 Treatment of shells (oysters, bivalves) attached to the bottom of a ship Shells attached to the bottom of a ship are highly decomposed and emit a foul odor. This shell (50 kg) was treated in the same manner as in Example 6 using the treatment agent of Example 4 as it was. The amount of processing agent added was 20 kg (addition rate 40%). The temperature inside the processed material continues at 90-110°C. It is completely powdered and there is almost no bad odor. The moisture content was measured on the second day of curing. The results are shown in Table 22. In the comparative example, similar to Example 6, hydraulic cement (addition rate 40
%), but on the second day of curing, it was not sufficiently solidified and a strong odor was generated.

[Table] Processed products can be used as chicken feed. In Examples 16 to 24 described above, the objects have high moisture content or are easily corroded, but by treating with the treatment agent of the present invention, the moisture content can be removed by evaporation. Since most of the remaining moisture becomes crystallization water, the product appears as a dry powder and is easy to handle. Furthermore, since materials that are easily corroded are sterilized at high temperatures during treatment, it can be understood that the treated materials do not have any putrid odor, and this material can be returned to the soil as soil. Comparative example A treatment agent (comparative example) with the composition shown in Table 23,
The treatment agents of Examples 1 to 4 were compared in terms of treatment ability for sludge waste using the agitator 1 used in the above examples. The sludge waste used at this time was activated sludge with a moisture content of 65%. As in Example 6, the sludge was treated as it was by mixing it with a treatment agent without undergoing any pretreatment process. The addition rate of the processing agent at this time was 20%. When the internal temperature of the mixing system was measured when this treatment agent and sludge were mixed, the results shown in Table 24 were obtained.

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[Table] As can be seen from Table 24, compared to the processing agents of Examples 1 to 4, the processing agents of Comparative Examples have an extremely low internal temperature of the mixing system and lack the ability to heat and evaporate moisture from the treated material. For this reason, the processing agents of Comparative Examples do not have any processing ability for processing that requires heat for fixing high-moisture content waste or harmful substances, whereas Examples 1 to 4 The high internal temperature allows moisture to be sufficiently evaporated or heated, so that it exhibits effective processing ability even for the above-mentioned wastes.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of the stirrer used in the treatment of the present invention, and FIG. 2 is a sectional view taken along line X--X of the same. 1... Stirrer, 2... Reaction box, 14... Stirring blade.

Claims (1)

[Claims] 1. 40.0 to 56.0 parts by weight of quicklime powder, 5.0 to 14.0 parts by weight of magnesium silicate lime powder, 3.5 to 6.5 parts by weight of talc powder,
Lime carbonate powder 12.5~18.0 parts by weight, clay powder 1.0~
3.0 parts by weight, calcium aluminate powder 9.0-11.0
parts by weight, and powder containing 50% by weight or more of sulfur trioxide
A waste treatment material characterized by containing 8.5 to 11.5 parts by weight. 2 The above-mentioned raw coal powder is a powder containing 95% or more of calcium oxide, the above-mentioned magnesium silicate lime powder is a powder containing 53% or more of calcium oxide, 30% or more of silicon dioxide, and the above-mentioned talcum powder is a powder containing 35% or more of silicon dioxide, The above-mentioned heavy carbonate lime powder is a powder containing 30% or more of magnesium oxide, the above-mentioned clay powder is a powder containing 50% or more of calcium oxide, and the above-mentioned clay powder contains 76% or more of silicon dioxide.
It is a powder containing 14% or more of aluminum oxide, and the above calcium aluminate powder contains 50% or more of aluminum oxide.
% or more, powder containing 30% or more of calcium oxide, and the powder containing 50% or more of sulfur trioxide is anhydrous aluminum sulfate powder or sulfur trioxide containing 25% or more of aluminum oxide, 65% or more of sulfur trioxide.
The waste treatment agent according to claim 1, which is calcined gypsum powder containing 55% or more and 2% or less of calcium hydroxide. 3 Quicklime powder 40.0 to 56.0 parts by weight, magnesium silicate lime powder 5.0 to 14.0 parts by weight, talcum powder 3.5 to 6.5 parts by weight,
Lime carbonate powder 12.5~18.0 parts by weight, clay powder 1.0~
3.0 parts by weight, calcium aluminate powder 9.0-11.0
parts by weight, and powder containing 50% by weight or more of sulfur trioxide
A method for treating waste, which comprises mixing a treatment agent containing 8.5 to 11.5 parts by weight with waste to be treated, and dehydrating the waste to powder. 4 The above-mentioned quicklime powder is a powder containing 95% or more of calcium oxide, the above-mentioned magnesium silicate lime powder is a powder containing 53% or more of calcium oxide, 30% or more of silicon dioxide, and the above-mentioned talcum powder is a powder containing 35% or more of silicon dioxide, The above-mentioned heavy carbonate lime powder is a powder containing 30% or more of magnesium oxide, the above-mentioned clay powder is a powder containing 76% or more of silicon dioxide,
It is a powder containing 14% or more of aluminum oxide, and the above calcium aluminate powder contains 50% or more of aluminum oxide.
% or more, powder containing 30% or more of calcium oxide, and the powder containing 50% or more of sulfur trioxide is anhydrous aluminum sulfate powder or sulfur trioxide containing 25% or more of aluminum oxide, 65% or more of sulfur trioxide.
The waste treatment method according to claim 3, wherein the waste is a calcined gypsum powder containing 55% or more and 2% or less of calcium hydroxide.