Method for accelerating carbonization of high-calcium and high-alkalinity waste residues by using industrial bacterial powder

Abstract

The invention discloses a method for accelerating carbonization of high-calcium and high-alkalinity waste residues by using industrial bacterial powder. The method comprises the following steps: step 1, pretreating the industrial bacterial powder to obtain activated bacterial liquid; 2, pretreatment of waste residues; 3, uniformly mixing the waste residues pretreated in the step 2 with water, adding the activated bacterial liquid in the step 1, and uniformly mixing to obtain to-be-reacted waste residue slurry; and 4, introducing carbon dioxide gas into the waste residue slurry to be reacted, and stirring for a certain time to participate in carbonization reaction. According to the method, the carbonization rate is increased by 3-8 times compared with that of a traditional process, the crystallinity of the product calcite is high, the carbon sequestration CO2 absorption amount is larger than or equal to 200 kg per ton of waste residues, the pH of the waste residues is reduced to 8.5-9.0 from 12.5, and the method is suitable for large-scale treatment of industrial waste residues such as carbide slag and steel slag and can be coupled with a CO2 capture system to achieve resource closed-loop utilization.

Description

Technical Field

[0001] The present invention relates to the cross - technical field of the resource utilization of solid waste and microbial mineralization technology, and particularly to a method for accelerating the carbonation of high - calcium and high - alkaline waste residues by industrial bacterial powder. Background Art

[0002] Industrial waste residues such as carbide slag and steel slag are rich in calcium oxide (CaO content > 30%). When they meet water, they form alkaline and strongly alkaline environments. Traditional open - air stacking is likely to cause environmental pollution and resource waste problems. The leachate of such waste residues can lead to soil compaction and groundwater pollution. At the same time, their high alkalinity inhibits the direct dissolution of carbon dioxide. Conventional carbonation technologies rely on high - temperature or high - pressure conditions, with a long reaction cycle and high energy consumption. For example, at room temperature, the natural carbonation of carbide slag takes 7 - 15 days, and the generated calcium carbonate mostly exists in metastable forms such as amorphous or vaterite, which is prone to reverse decomposition. Although existing microbial mineralization technologies can catalyze the CO 2 hydration reaction through carbonic anhydrase, their applications are mostly limited to the field of soil remediation and have not been effectively combined with the large - scale treatment of high - calcium and high - alkaline industrial waste residues. Summary of the Invention

[0003] The present invention aims to solve the problem that although existing microbial mineralization technologies can catalyze the CO 2 hydration reaction through carbonic anhydrase, their applications are mostly limited to the field of soil remediation and have not been effectively combined with the large - scale treatment of high - calcium and high - alkaline industrial waste residues, and provides a method for accelerating the carbonation of high - calcium and high - alkaline waste residues by industrial bacterial powder.

[0004] To achieve the above technical objectives, the technical solution provided by the present invention is as follows:

[0005] A method for accelerating the carbonation of high - calcium and high - alkaline waste residues by industrial bacterial powder, comprising the following steps:

[0006] Step 1: Obtain an activated bacterial liquid after pretreatment of the industrial bacterial powder;

[0007] Step 2: Pretreatment of the waste residue;

[0008] Step 3: Uniformly mix the waste residue pretreated in Step 2 with water, and add the activated bacterial liquid in Step 1 and mix uniformly to obtain a waste residue slurry to be reacted;

[0009] Step 4: Introduce carbon dioxide gas into the waste residue slurry to be reacted, and stir for a certain time to participate in the carbonation reaction.

[0010] Further, the industrial bacterial powder is Bacillus, belonging to agricultural bacterial fertilizer.

[0011] Further, the genus Bacillus includes Paenibacillus mucilaginosus, Bacillus mucilaginosus, Bacillus cereus, and any one of the composite bacteria containing any one of the Bacillus.

[0012] Furthermore, the calcium oxide content in the waste residue is > 30%, it is alkaline, and the pH ≥ 11.

[0013] Furthermore, in step 1, the pretreatment step includes placing industrial bacterial powder in a culture medium and incubating it at a constant temperature for a certain time to prepare an activated bacterial liquid.

[0014] Furthermore, the concentration of industrial bacterial powder in the culture medium is 0.001 g / ml - 0.04 g / ml, the constant temperature is 20 - 50 °C, and the incubation time is 18 - 48 hours.

[0015] Furthermore, in step 2, the pretreatment step includes grinding and screening the dried waste residue, and selecting the waste residue with a particle size range < 0.18 mm for standby.

[0016] Furthermore, in step 3, the mass ratio of the waste residue to water is 1:8 - 1:40, and the volume ratio of the activated bacterial liquid to the waste residue slurry to be reacted is 1:100 - 50:100.

[0017] Furthermore, in step 4, the carbon dioxide gas flow rate is 40 - 160 ml / min, the stirring rate is 10 - 300 r / min, and the reaction time is 1 - 24 h.

[0018] The present invention has the following beneficial effects:

[0019] 1. The present invention utilizes the strong environmental adaptability and biocatalytic activity of agricultural microbial inoculants (Bacillus genus) to achieve efficient carbonization of waste residues through a triple action mechanism. First, the high resuscitation rate and alkali tolerance of the inoculant: After the bacterial powder is activated by glucose - peptone nutrient solution, the spore germination rate is high, and the metabolic activity of the bacteria is significantly enhanced; the unique alkali - resistant gene of Bacillus enables it to survive for more than 48 hours in a highly alkaline environment with an initial pH of 11 - 12 in the carbide slag slurry, providing a biological activity basis for continuous catalytic reactions. Second, the directional catalytic action of carbonic anhydrase: The activated bacteria secrete carbonic anhydrase (CA enzyme), and the zinc ion cluster in its active center remains stable within the pH range of 9 - 12, which can accelerate the 2 hydration reaction to increase the concentration of HCO 3 - in the liquid phase by 3 - 5 times, driving the combination of Ca 2+ and CO 3 2- to form calcium carbonate. Third, organic - inorganic interface regulation: The acidic polysaccharides (such as dextran and rhamnogalacturonan) and short - chain organic acids (such as citric acid) produced by the bacterial metabolism form a dynamic micro - environment. On the one hand, the carboxyl / hydroxyl groups neutralize local OH- ions, reducing the pH around the bacteria to the optimal enzyme activity range of 9 - 10; on the other hand, the polysaccharide network fixes Ca2+ , its regular functional group arrangement provides directional anchoring sites for calcium carbonate crystal nuclei, inducing the preferential growth of calcite. Experiments show that under this synergistic mechanism, the carbonation rate is increased by 3 - 8 times compared with the ordinary carbonation method, the calcite crystallinity is high, and the stability of the product is significantly improved.

[0020] 2. The alkali - tolerant Bacillus in the agricultural microbial inoculant selected in the present invention (such as extracted from commercial bacterial fertilizers) has a wide source, low cost, and is prepared by an industrial fermentation process, with stable quality, which is conducive to large - scale application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the bacterial morphology (SEM) diagram;

[0022] Figure 2 is the morphology diagram of the carbonized product;

[0023] Figure 3 is the growth curve of the bacteria under different pH conditions;

[0024] Figure 4 is the thermal analysis spectrum of the carbonized product of Examples 1 and 2 after reacting for 2 h;

[0025] Figure 5 is the XRD spectrum of the carbonized product after Example 1 reacts for 6 h;

[0026] Figure 6 is the change of pH of the waste residue after reacting for a certain time;

[0027] Figure 7 is the carbonation rate change diagram of the examples and the blank example. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0029] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] The calcium carbide slag catalytic carbonization method of this embodiment is specifically as follows: Mix the bacterial powder 1# with deionized water at a concentration of 0.05 g / 50 ml. After constant-temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L. Oscillate and culture at 30 °C for 18 hours to prepare the bacterial liquid. Subsequently, take 25 ml of this activated bacterial liquid and add it to a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 gas into the reaction system at a flow rate of 40 ml / min for 24 h to complete the carbonization reaction process.

[0032] Example 2

[0033] The calcium carbide slag catalytic carbonization method of this embodiment is specifically as follows: Mix the bacterial powder 1# with deionized water at a concentration of 0.5 g / 50 ml. After constant-temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L. Oscillate and culture at 30 °C for 24 hours to prepare the bacterial liquid. Subsequently, take 250 ml of this activated bacterial liquid and add it to a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 gas into the reaction system at a flow rate of 80 ml / min for 24 h to complete the carbonization reaction process.

[0034] Example 3

[0035] The calcium carbide slag catalytic carbonization method of this embodiment is specifically as follows: Mix the bacterial powder 1# with deionized water at a concentration of 1 g / 50 ml. After constant-temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L. Oscillate and culture at 30 °C for 36 hours to prepare the bacterial liquid. Subsequently, take 500 ml of this activated bacterial liquid and add it to a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 gas into the reaction system at a flow rate of 120 ml / min for 24 h to complete the carbonization reaction process.

[0036] Example 4

[0037] The calcium carbide slag catalytic carbonization method of this embodiment is specifically as follows: Mix the bacterial powder 1# with deionized water at a concentration of 2 g / 50 ml. After constant-temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L. Oscillate and culture at 30 °C for 48 hours to prepare the bacterial liquid. Subsequently, take 1250 ml of this activated bacterial liquid and add it to a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2Gas, ventilation time 24 h, to complete the carbonization reaction process.

[0038] Example 5

[0039] The calcium carbide slag catalytic carbonization method of this example is specifically as follows: Mix bacterial powder 2# with deionized water at a concentration of 0.05 g / 50 ml, after constant temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L, and culture it by oscillation at 30 °C for 24 hours to prepare the bacterial solution. Then take 500 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 Gas, ventilation time 24 h, to complete the carbonization reaction process.

[0040] Example 6

[0041] The calcium carbide slag catalytic carbonization method of this example is specifically as follows: Mix bacterial powder 2# with deionized water at a concentration of 0.5 g / 50 ml, after constant temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L, and culture it by oscillation at 30 °C for 18 hours to prepare the bacterial solution. Then take 1250 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 Gas, ventilation time 24 h, to complete the carbonization reaction process.

[0042] Example 7

[0043] The calcium carbide slag catalytic carbonization method of this example is specifically as follows: Mix bacterial powder 2# with deionized water at a concentration of 1 g / 50 ml, after constant temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L, and culture it by oscillation at 30 °C for 48 hours to prepare the bacterial solution. Then take 25 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 Gas, ventilation time 24 h, to complete the carbonization reaction process.

[0044] Example 8

[0045] The specific method for catalytic carbonization of carbide slag in this example is as follows: Mix bacterial powder #2 with deionized water at a concentration of 2 g / 50 ml. After constant-temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L. Oscillate and culture at 30 °C for 36 hours to prepare a bacterial solution. Subsequently, take 25 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of carbide slag and 250 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 gas into the reaction system at a flow rate of 40 ml / min for 24 h to complete the carbonization reaction process.

[0046] Example 9

[0047] The specific method for catalytic carbonization of carbide slag in this example is as follows: Mix bacterial powder #3 with deionized water at a concentration of 0.05 g / 50 ml. After constant-temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L. Oscillate and culture at 30 °C for 36 hours to prepare a bacterial solution. Subsequently, take 1250 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 gas into the reaction system at a flow rate of 80 ml / min for 24 h to complete the carbonization reaction process.

[0048] Example 10

[0049] The specific method for catalytic carbonization of carbide slag in this example is as follows: Mix bacterial powder #3 with deionized water at a concentration of 0.5 g / 50 ml. After constant-temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L. Oscillate and culture at 30 °C for 48 hours to prepare a bacterial solution. Subsequently, take 500 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 gas into the reaction system at a flow rate of 40 ml / min for 24 h to complete the carbonization reaction process.

[0050] Example 11

[0051] The specific method for catalytic carbonization of carbide slag in this example is as follows: Mix bacterial powder #3 with deionized water at a concentration of 1 g / 50 ml. After constant-temperature oscillation activation for 20 min, take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L. Oscillate and culture at 30 °C for 18 hours to prepare a bacterial solution. Subsequently, take 250 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2Gas, ventilation time 24 h, to complete the carbonization reaction process.

[0052] Example 12

[0053] The specific method for catalytic carbonization of carbide slag in this example is as follows: Mix bacterial powder 3# with deionized water at a concentration of 2 g / 50 ml, activate it by constant temperature oscillation for 20 min, then take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L, and culture it by oscillation at 30 °C for 36 hours to prepare a bacterial solution. Subsequently, take 25 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 Gas, ventilation time 24 h, to complete the carbonization reaction process.

[0054] Example 13

[0055] The specific method for catalytic carbonization of carbide slag in this example is as follows: Mix bacterial powder 4# with deionized water at a concentration of 0.05 g / 50 ml, activate it by constant temperature oscillation for 20 min, then take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L, and culture it by oscillation at 30 °C for 48 hours to prepare a bacterial solution. Subsequently, take 250 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 Gas, ventilation time 24 h, to complete the carbonization reaction process.

[0056] Example 14

[0057] The specific method for catalytic carbonization of carbide slag in this example is as follows: Mix bacterial powder 4# with deionized water at a concentration of 0.5 g / 50 ml, activate it by constant temperature oscillation for 20 min, then take 5 ml of the liquid and add it to a solution containing 10 g of glucose and 5 g of peptone in 1 L, and culture it by oscillation at 30 °C for 36 hours to prepare a bacterial solution. Subsequently, take 25 ml of this activated bacterial solution and add it to a slurry prepared by mixing 250 g of carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, continuously introduce CO 2 Gas, ventilation time 24 h, to complete the carbonization reaction process.

[0058] Example 15

[0059] The calcium carbide slag catalytic carbonization method in this embodiment is specifically as follows: Bacterial powder 4# is mixed with deionized water at a concentration of 1 g / 50 ml. After constant-temperature oscillation activation for 20 min, 5 ml of the liquid is taken and added to a solution containing 10 g of glucose and 5 g of peptone in 1 L. It is cultured by oscillation at 30 °C for 24 hours to prepare a bacterial solution. Subsequently, 1250 ml of this activated bacterial solution is added to a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, CO gas with a flow rate of 40 ml / min is continuously introduced into the reaction system, and the aeration time is 24 h to complete the carbonization reaction process. 2 Gas, and the aeration time is 24 h to complete the carbonization reaction process.

[0060] Example 16

[0061] The calcium carbide slag catalytic carbonization method in this embodiment is specifically as follows: Bacterial powder 4# is mixed with deionized water at a concentration of 2 g / 50 ml. After constant-temperature oscillation activation for 20 min, 5 ml of the liquid is taken and added to a solution containing 10 g of glucose and 5 g of peptone in 1 L. It is cultured by oscillation at 30 °C for 18 hours to prepare a bacterial solution. Subsequently, 500 ml of this activated bacterial solution is added to a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10. Finally, CO gas with a flow rate of 80 ml / min is continuously introduced into the reaction system, and the aeration time is 24 h to complete the carbonization reaction process. 2 Gas, and the aeration time is 24 h to complete the carbonization reaction process.

[0062] Blank control example

[0063] The calcium carbide slag catalytic carbonization method is specifically as follows: In a slurry prepared by mixing 250 g of calcium carbide slag and 2500 ml of water at a mass ratio of 1:10, CO gas with a flow rate of 40 ml / min is continuously introduced. 2 Gas, and the aeration time is 24 h to complete the carbonization reaction process.

[0064] As shown in Table 1, the bacterial powder is used as a catalytic aid to accelerate the carbonization of calcium carbide slag in the example.

[0065] Table 1 The bacterial powder is used as a catalytic aid to accelerate the carbonization of calcium carbide slag

[0066]

[0067] In the table, 1# is Paenibacillus mucilaginosus; 2# is Bacillus mucilaginosus; 3# is Bacillus cereus; 4# is a composite bacterium containing Bacillus subtilis, Bacillus licheniformis, and Paenibacillus mucilaginosus.

[0068] As Figure 1 shown is the bacterial morphology (SEM) diagram. It can be seen from the diagram that the morphology of the bacterial fertilizer after resuscitation is bacillus, which conforms to the morphology of Bacillus, proving that the bacterial fertilizer has been successfully resuscitated.

[0069] As Figure 2As shown, it can be seen from the figure that the morphology of the product (calcium carbonate) after the carbonization of carbide slag is mainly spherical and cocoon-shaped aggregates formed by the stacking of complete cubic crystals and small cubic blocks, which are common morphologies of calcite. This confirms that the bacterial fertilizer is used to accelerate the carbonization of carbide slag, and the product is mainly calcite, which is the stable state of calcium carbonate.

[0070] As shown in Table 2, the CO 2 absorption amounts of the examples and comparative examples under different reactions. Combining Figure 7 with the data in Table 2, it is found that Examples 1-16 have a significant accelerating effect compared with the blank example. The carbonization rate and CO 2 absorption amount data under different reaction times are higher than those of the blank example. Among them, the influence of the bacterial liquid age, bacterial powder content, and bacterial liquid dosage on the carbonization reaction is relatively small, showing different times to reach the carbonization equilibrium period, and the time difference is within 1-3 h. However, the CO 2 flow rate has a significant influence. The carbonization rates of Examples 1, 8, 10, and 15 are slower among the same type of bacterial powders, probably because the enzymatic CO 2 in the bacterial liquid accelerates hydration to provide carbonate ions, and the CO 2 flow rate is low, resulting in a slow generation rate of carbonate ions.

[0071] Table 2 CO 2 absorption amounts (kg CO 2 / t product) of the examples and comparative examples under different reactions

[0072]

[0073]

[0074] As Figure 3 shown, taking bacterial powder 1# as an example, its growth curve under different pH conditions is tested. The larger the OD600 value, the higher the bacterial concentration and the more the number of surviving bacteria. Comparing different pH values confirms that it can have a certain activity in the high alkaline (11-13) range and can be used for the accelerated carbonization reaction of high alkaline solid waste.

[0075] As shown in Table 3, it shows the activity of the enzyme (CA enzyme) that plays a major catalytic role in the bacterial liquid after being cultured with different industrial bacterial fertilizers, confirming that four industrial bacterial fertilizers can produce CA enzyme after resuscitation culture and can be used for catalytic reactions.

[0076] Table 3 Carbonic anhydrase activity after culturing industrial bacteria for 48 h

[0077] Industrial bacteria 1# 2# 3# 4# Enzyme activity (U / g) 12482 29221 9139 5170

[0078] As Figure 4As shown, it is the thermal analysis spectrum of the carbonized product after reacting for 2 h in Examples 1 and 2. The calcium carbonate decomposition region is clearly marked on the spectrum, confirming that a large amount of calcium carbonate exists in the product after carbonization for 2 h.

[0079] As Figure 5 shown, it is the XRD spectrum of the carbonized product after reacting for 6 h in Example 1. The results on the spectrum show that the product after reacting for 6 h contains a large amount of calcium carbonate and unreacted calcium hydroxide, confirming that carbide slag captures CO 2 , and the product exists in the form of calcium carbonate.

[0080] As Figure 6 shown, after the waste residue reacts for a certain time, the pH drops from 12.5 to 8.5 - 9.0.

[0081] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0082] The above specific embodiments are detailed descriptions of the present invention. It cannot be determined that the specific embodiments of the present invention are only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions and substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A method for accelerating the carbonization of high-calcium and high-alkalinity waste residues using industrial bacterial powder, characterized in that: The steps include: Step 1: Pre-treat industrial bacterial powder to obtain activated bacterial solution; Step 2: Pretreatment of waste residue; Step 3: uniformly mix the waste residue pretreated in step 2 with water, and add the activated bacterial solution in step 1 and mix evenly to obtain a waste residue slurry to be reacted; Step 4: Introduce carbon dioxide gas into the waste residue slurry to be reacted and stir for a certain period of time to participate in the carbonization reaction.

2. The method for accelerating the carbonization of high-calcium and high-alkalinity waste residues using industrial bacterial powder according to claim 1, characterized in that: The industrial bacterial powder is Bacillus, which is an agricultural bacterial fertilizer.

3. The method for accelerating the carbonization of high-calcium and high-alkalinity waste residues using industrial bacterial powder according to claim 2, characterized in that: The genus Bacillus includes any one of Paenibacillus gelatinosa, Bacillus gelatinosa, Bacillus cereus, and a composite bacteria containing any one of the Bacillus species.

4. The method for accelerating the carbonization of high-calcium and high-alkalinity waste residues using industrial bacterial powder according to claim 1, characterized in that: The waste residue has a calcium oxide content of more than 30%, is alkaline, and has a pH value of ≥11.

5. The method of accelerating the carbonization of high-calcium and high-alkalinity waste residues using industrial bacterial powder according to claim 1, characterized in that: In step 1, the pretreatment step includes placing the industrial bacterial powder in a culture medium and culturing at a constant temperature for a certain period of time to prepare an activated bacterial solution.

6. The method of accelerating the carbonization of high-calcium and high-alkalinity waste residues using industrial bacterial powder according to claim 5, characterized in that: The concentration of industrial bacterial powder in the culture medium is 0.001 g / ml-0.04 g / ml, the constant temperature is 20-50° C., and the culture time is 18-48 hours.

7. The method for accelerating the carbonization of high-calcium and high-alkalinity waste residues using industrial bacterial powder according to claim 1, characterized in that: In step 2, the pretreatment step includes grinding and screening the dried waste residue, and selecting waste residue with a particle size range of less than 0.18 mm for use.

8. The method for accelerating the carbonization of high-calcium and high-alkalinity waste residues using industrial bacterial powder according to claim 1, characterized in that: In step 3, the mass ratio of waste residue to water is 1:8-1:40, and the volume ratio of activated bacterial solution to waste residue slurry to be reacted is 1:100-50:

100.

9. The method for accelerating the carbonization of high-calcium and high-alkalinity waste residues using industrial bacterial powder according to claim 1, characterized in that: In step 4, the carbon dioxide gas flow rate is 40-160 ml / min, the stirring rate is 10-300 r / min, and the reaction time is 1-24 h.

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