CN113415803A - Waste treatment method - Google Patents
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- CN113415803A CN113415803A CN202110927418.7A CN202110927418A CN113415803A CN 113415803 A CN113415803 A CN 113415803A CN 202110927418 A CN202110927418 A CN 202110927418A CN 113415803 A CN113415803 A CN 113415803A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/234—Purification; Stabilisation; Concentration
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/38—Condensed phosphates
- C01B25/44—Metaphosphates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Abstract
The invention discloses a waste treatment method, which comprises the following steps: mixing the acidic waste liquid with the biomass solid waste to obtain a first mixture; obtaining a second mixture through a first preset reaction time of the first mixture at a first preset temperature; carbonizing the second mixture in a nitrogen atmosphere to obtain a third mixture; and washing the third mixture to obtain the activated carbon, the inorganic acid and the inorganic acid salt.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a waste treatment method.
Background
Metal pickling is significant in industrial production, and different types of acid have advantages and disadvantages during pickling treatment. No toxic gas is generated in the phosphoric acid pickling process, and the defect of low speed is optimized in the research, so the phosphoric acid pickling has wide application in the metal pickling industry.
In the production process of the medical intermediate, polyphosphoric acid is commonly used as a catalyst or a solvent, so that a large amount of phosphoric acid waste liquid is generated. The phosphoric acid waste liquid has high content of organic impurities and does not contain or contains metal ion impurities.
The phosphoric acid waste acid has far more harm to underground water than common chemical wastewater, and when the phosphoric acid waste acid permeates underground, carbonate, sulfite, sulfide and the like in rock and soil react to generate harmful gases such as sulfur dioxide, hydrogen sulfide and the like, and the harmful gases are emitted into the air to pollute the atmosphere, and water eutrophication can be caused when the phosphoric acid waste acid flows into water.
At present, the high-concentration phosphoric acid waste liquid is mainly treated by processes of chemical precipitation, evaporation concentration and the like. Before the phosphoric acid wastewater generated by metal pickling is recycled, an ion exchange method is adopted to remove and recover Al3+、Zn2+Plasma; high-concentration phosphate in the effluent is generated into struvite, calcium phosphate and other forms by a precipitation method, so that phosphorus resource recovery is realized. If the phosphoric acid waste liquid contains organic impurities with higher concentration, the quality of regenerated phosphoric acid or calcium phosphate is affected, resource waste is caused, and the environment is also harmed. Therefore, the process for treating the high-concentration phosphoric acid wastewater with higher economical efficiency is urgently sought.
The biomass waste is waste generated by production and consumption of human beings in the process of utilizing biomass, and has the characteristics of energy density, availability and the like. Biomass waste, one type of solid waste, is an environmental pollutant that people must properly dispose of. If the treatment is improper, the potential threats can be brought to regional water environment, atmosphere, soil environment and the like, and environmental pollution is caused. Under the accumulation condition of easily degradable biomass waste, a large amount of generated malodorous gases are also one of important influencing factors influencing the quality of peripheral air; in addition, the random stacking of biomass wastes can cause serious soil environmental pollution. The components of the biomass waste are very complex, for example, livestock and poultry manure contains a large amount of pathogenic microorganisms or parasites, some industrial biomass waste contains acid or heavy metal, municipal sludge contains a plurality of organic matters and heavy metals such as Cu, Cr, Zn and the like, and the stacking or landfill of the biomass waste containing a plurality of pollutants can cause serious pollution to the soil environment if the biomass waste is not treated. The biomass waste is also important while causing environmental pollutionRenewable resources and energy sources. Reasonably and efficiently resource biomass waste into clean energy for CO2Emission reduction is also of great significance.
At present, biomass cracking and carbonization are the main method for treating biomass solid waste, large molecules of a biomass precursor are decomposed in the pyrolysis process to generate small molecular gas, condensable volatile matters and solid coke products, and the condensable volatile matters are rapidly cooled into flowable biological oil or tar and have pungent coke flavor; the solid coke product is called biomass charcoal, and is activated by acid, alkali or water vapor, and ash or soluble substances in the pore canal are removed to obtain the activated carbon with large specific surface area. However, the process is complicated, a large amount of acid, alkali and other reagents are consumed, and the activated material needs to be washed by pure water to remove the acid, alkali and other activating reagents, so that a large amount of waste acid and waste alkali solution is generated.
Disclosure of Invention
In view of the above, the present invention provides a method for waste treatment, which is intended to at least partially solve the above technical problems.
To achieve the above technical object, as one aspect of the present invention, there is provided a method of waste treatment, comprising: mixing the acidic waste liquid with the biomass solid waste to obtain a first mixture; obtaining a second mixture by reacting the first mixture at a first preset temperature for a first preset reaction time; carbonizing the second mixture in nitrogen atmosphere to obtain a third mixture; and washing the third mixture to obtain the activated carbon, the inorganic acid and the inorganic acid salt.
According to an embodiment of the present invention, the first predetermined temperature is 100 to 350 ℃, and the first predetermined reaction time is 0.5 to 12 hours.
According to an embodiment of the present invention, the carbonizing treatment of the second mixture in a nitrogen atmosphere to obtain a third mixture includes: and heating the second mixture at 500-1000 ℃ for 0.5-6 h in a nitrogen atmosphere to obtain the third mixture.
According to an embodiment of the present invention, the above third mixture is washed to obtain activated carbon, an inorganic acid and an inorganic acid salt, and the method comprises: washing the third mixture by deionized water until the washing liquid is neutral to obtain a water phase mixture and a solid phase mixture; performing ion exchange and concentration treatment on the water phase mixture to obtain inorganic acid; washing the solid phase mixture by deionized water to obtain suspension and active carbon; filtering the suspension to obtain inorganic acid salt.
According to the embodiment of the invention, the washing of the solid phase mixture with deionized water to obtain the suspension and the activated carbon comprises the following steps: washing the solid phase mixture by deionized water to obtain suspension and solid matters; and drying the solid substance at a second preset temperature to obtain the activated carbon.
According to an embodiment of the present invention, the second predetermined temperature is 60 to 120 ℃.
According to an embodiment of the present invention, the mixing the acidic waste liquid and the biomass solid waste to obtain a first mixture includes: mixing the acidic waste liquid and the biomass solid waste with 0.3-10 kg of the biomass solid waste per liter to obtain the first mixture.
According to an embodiment of the present invention, the acidic waste liquid includes at least one of: the acid waste liquid containing phosphoric acid, the mixed acid waste liquid containing phosphoric acid and sulfuric acid, and the mixed acid waste liquid containing phosphoric acid and hydrochloric acid.
The method adopts a method of cooperatively treating the acidic waste water and the biomass solid waste, mixes the acidic waste liquid and the biomass solid waste and then carries out carbonization treatment, inorganic acid in the acidic waste liquid can remove ash and tar in biomass charcoal, the inorganic acid can be converted into inorganic acid salt in the carbonization treatment, strong acid waste liquid can not be generated, and meanwhile, the biomass charcoal is directly activated into resource active charcoal due to the existence of acid in the carbonization process.
Drawings
Fig. 1 is a flow chart of a method for waste treatment according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in combination with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The test materials and reagents used in the following examples, etc., are commercially available.
In the related technology, the acid waste liquid and the biomass solid waste are respectively treated, but strong acid waste liquid is generated when the acid waste liquid is treated, the treatment process of the strong acid waste liquid is complex, the amount of generated sludge is large, the amount of byproducts is large, the cost is high, and the wastewater is difficult to reach the standard; when biomass solid waste is treated, biomass charcoal is obtained, activated charcoal can be obtained only by acid and alkali activation in the using process, and the problems of complex charcoal activation process, small surface area and the like exist.
Aiming at the problems, the invention adopts a method for cooperatively treating the acid wastewater and the biomass solid waste, mixes the acid wastewater and the biomass solid waste and then carries out carbonization treatment, realizes simultaneous resource utilization of phosphorus and biomass, avoids generation of new waste liquid and solid waste in a complex phosphoric acid wastewater treatment process, and has application prospect.
Accordingly, the present invention provides a waste treatment method, as shown in fig. 1, comprising: mixing the acidic waste liquid with the biomass solid waste to obtain a first mixture; obtaining a second mixture by reacting the first mixture at a first preset temperature for a first preset reaction time; carbonizing the second mixture in nitrogen atmosphere to obtain a third mixture; and washing the third mixture to obtain the activated carbon, the inorganic acid and the inorganic acid salt.
In the embodiment of the invention, the acidic waste liquid and the biomass solid waste are mixed and then carbonized, inorganic acid in the acidic waste liquid can remove ash and tar in the biomass carbon, the inorganic acid can be converted into inorganic acid salt in the carbonization treatment, strong acid waste liquid can not be generated, the problems of complex process, large amount of generated sludge, large amount of byproducts, high cost, difficult standard reaching of waste water and the like of the traditional waste liquid treatment process are solved, meanwhile, the biomass carbon is directly activated into resource activated carbon due to the existence of acid in the carbonization process, the carbon activation process is simple and easy, the surface area is large, in addition, the generation of new waste liquid and solid waste in the complex phosphoric acid waste water treatment process is also avoided, and the simultaneous resource utilization of phosphorus and biomass is realized.
According to an embodiment of the present invention, the first predetermined temperature includes 100 to 350 ℃, for example: 100 ℃, 200 ℃ and 300 ℃; the first preset reaction time period includes 0.5 to 12 hours, for example: 0.5h, 1h, 2h, 5h, 7h, 9h and 12 h.
According to an embodiment of the present invention, the carbonizing treatment of the second mixture in a nitrogen atmosphere to obtain a third mixture includes: and (3) putting the second mixture in a nitrogen atmosphere at the temperature of 500-1000 ℃, for example: heating for 0.5-6 h at 500 ℃, 800 ℃ and 1000 ℃, for example: heating for 0.5h, 4h, 6h to obtain the third mixture.
In the embodiment of the invention, under the carbonization treatment of the mixture of the acidic waste liquid and the biomass solid waste in the high-temperature nitrogen atmosphere, the biomass charcoal and the organic matter components in the waste liquid are carbonized, and the phosphoric acid is converted into P2O5Or the phosphate radical is combined with nonmetal ions or metal ions such as Si, Al, Fe, Na and the like in the form of metaphosphate radical, so that the phosphoric acid is fixed; heavy metal ions in the waste liquid such as Al, Zn and the like react with phosphate radical to generate insoluble phosphate or metaphosphate, so that extractable phosphoric acid (P) stored with the biomass charcoal is realized2O5) The carbonized biochar can be activated at the same time.
According to an embodiment of the present invention, the above third mixture is washed to obtain activated carbon, an inorganic acid and an inorganic acid salt, and the method comprises: washing the third mixture by deionized water until the washing liquid is neutral to obtain a water phase mixture and a solid phase mixture; performing ion exchange and concentration treatment on the water phase mixture to obtain inorganic acid; washing the solid phase mixture by deionized water to obtain suspension and active carbon; filtering the suspension to obtain inorganic acid salt.
In the embodiment of the invention, in the process, the biomass charcoal in the third mixture is washed by the deionized water to obtain the activated carbon, so that the phosphoric acid stored in the biomass charcoal is dissolved in the water, the recovery of the phosphoric acid is realized, components such as organic matters, metal ions and the like in the waste liquid do not need to be pretreated, the treatment process of the phosphoric acid waste liquid is simplified, the use and discharge of dangerous chemical substances are reduced, and the burden on the environment is reduced.
According to an embodiment of the present invention, the second predetermined temperature includes 60 to 120 ℃, for example: 60 ℃, 80 ℃, 100 ℃ and 120 ℃.
According to an embodiment of the present invention, the mixing the acidic waste liquid and the biomass solid waste to obtain a first mixture includes: mixing the acidic waste liquid and the biomass solid waste by the weight ratio of the acidic waste liquid to 0.3-10 kg per liter, for example: 0.3kg, 3kg, 6kg, 10kg of the biomass solid waste, and mixing the biomass solid waste to obtain the first mixture.
According to the embodiment of the invention, in the process, the activated carbon with high specific surface area is obtained after the biomass carbon is dried, so that the preparation process of the activated carbon is simplified, and the cost of the activated carbon is reduced.
According to an embodiment of the present invention, the acidic waste liquid includes at least one of: the acid waste liquid containing phosphoric acid, the mixed acid waste liquid containing phosphoric acid and sulfuric acid, and the mixed acid waste liquid containing phosphoric acid and hydrochloric acid.
In the embodiment of the invention, the phosphoric acid in the high-concentration phosphoric acid waste liquid or the phosphoric acid concentrated solution is recycled, and components such as organic matters, metal ions and the like in the waste liquid do not need to be pretreated, so that the treatment process of the phosphoric acid waste liquid is simplified, the use and discharge of dangerous chemical substances are reduced, and the burden on the environment is reduced.
According to the embodiment of the invention, the washing of the solid phase mixture with deionized water to obtain the suspension and the activated carbon comprises the following steps: washing the solid phase mixture by deionized water to obtain suspension and solid matters; and drying the solid substance at a second preset temperature to obtain the activated carbon.
According to the embodiment of the invention, the suspension is white colloid formed by nano metaphosphate, is suspended in the solution, and the metaphosphate can be collected by filtering the washing solution, so that the resource utilization of the phosphoric acid waste liquid is realized.
The present invention will be described in detail with reference to specific examples.
Example 1
A waste treatment method comprises three stages of mixing pretreatment of waste liquid and solid waste, high-temperature treatment of the mixture, recovery of phosphoric acid in biomass charcoal obtained at high temperature and biomass charcoal activation.
And (3) a mixed pretreatment stage of waste liquid and solid waste: filling 0.5L of waste liquid into a glass beaker, and pouring 1000g of coffee grounds into the beaker to be uniformly stirred after detection, wherein the concentration of aluminum ions is 8.27g/L, the content of phosphoric acid is 28.5%, the conductivity coefficient is 7.88ms/cm, and the density is 1.7 g/mL; the glass beaker was placed on a hot plate and heated at 100 ℃ for 0.5 h.
High-temperature treatment stage of the mixture: and placing the treated mixture into a quartz boat or a corundum crucible, adding the quartz boat or the corundum crucible into a high-temperature atmosphere furnace, and heating for 0.3h at 500 ℃ in an oxygen-deficient environment.
Recovering phosphoric acid from the biomass charcoal obtained at high temperature and activating the biomass charcoal: washing the biomass charcoal prepared at the temperature by using deionized water, and collecting washing liquid; and when the washing liquid is neutral, drying the remaining solid at 60 ℃ to obtain the activated carbon.
Different carbonization temperatures, P2O5When the content of the biomass charcoal and the specific surface area of the activated carbon are different and the carbonization temperature is 500 ℃, P is2O5The content of the heavy metal in the biomass charcoal is 22%, the recovery rate of phosphoric acid is 100%, the specific surface area of the activated carbon is 811.8m2/g, and the heavy metal in the waste liquid is converted into metal oxide or exists in the form of metaphosphate.
Example 2
A waste treatment method comprises three stages of mixing pretreatment of waste liquid and solid waste, high-temperature treatment of the mixture, recovery of phosphoric acid in biomass charcoal obtained at high temperature and biomass charcoal activation.
And (3) a mixed pretreatment stage of waste liquid and solid waste: filling 0.5L of waste liquid into a glass beaker, and pouring 1000g of coffee grounds into the beaker to be uniformly stirred after detection, wherein the concentration of aluminum ions is 8.27g/L, the content of phosphoric acid is 28.5%, the conductivity coefficient is 7.88ms/cm, and the density is 1.7 g/mL; the glass beaker was placed on a hot plate and heated at 200 ℃ for 5 h.
High-temperature treatment stage of the mixture: and placing the treated mixture into a quartz boat or a corundum crucible, adding the quartz boat or the corundum crucible into a high-temperature atmosphere furnace, and heating for 4 hours at 800 ℃ in an oxygen-deficient environment.
Recovering phosphoric acid from the biomass charcoal obtained at high temperature and activating the biomass charcoal: taking biomass charcoal prepared at different temperatures, washing with deionized water, and collecting washing liquid; and when the washing liquid is neutral, drying the remaining solid at 80 ℃ to obtain the activated carbon.
When the carbonization temperature is 800 ℃, P2O5The content of the active carbon in the biomass carbon is 6.4 percent, the recovery rate of the phosphoric acid is 7.1 percent, and the specific surface area of the active carbon is 314.8m2And/g, most of phosphoric acid in the waste liquid is converted into metaphosphate and mainly exists in the form of aluminum metaphosphate.
Example 3
A waste treatment method comprises three stages of mixing pretreatment of waste liquid and solid waste, high-temperature treatment of the mixture, recovery of phosphoric acid in biomass charcoal obtained at high temperature and biomass charcoal activation.
And (3) a mixed pretreatment stage of waste liquid and solid waste: putting 0.5L of waste liquid into a glass beaker, detecting, wherein the concentration of aluminum ions is 8.27g/L, the content of phosphoric acid is 28.5%, the conductivity coefficient is 7.88ms/cm, and the density is 1.7g/mL, putting 1000g of waste liquid which takes animal wastes and activated sludge as substances into the beaker, and uniformly stirring; the glass beaker was placed on a hot plate and heated at 300 ℃ for 12 h.
High-temperature treatment stage of the mixture: and placing the treated mixture into a quartz boat or a corundum crucible, adding the quartz boat or the corundum crucible into a high-temperature atmosphere furnace, and heating for 6 hours at 700 ℃ in an oxygen-deficient environment.
Recovering phosphoric acid from the biomass charcoal obtained at high temperature and activating the biomass charcoal: taking biomass charcoal prepared at different temperatures, washing with deionized water, and collecting washing liquid; and when the washing liquid is neutral, drying the remaining solid at 120 ℃ to obtain the activated carbon.
When the carbonization temperature is 700 ℃, P2O5The content of the active carbon in the biomass carbon is 8.7 percent, the recovery rate of the phosphoric acid is 50.3 percent, and the specific surface area of the active carbon is 180.2m2(ii) in terms of/g. During high-temperature carbonization, most of phosphoric acid in the waste liquid is converted into metaphosphate which mainly exists in the forms of aluminum metaphosphate and silicon phosphate.
As a result, the carbonization temperature and the biomass species were different, P2O5When the content of the biomass carbon and the recovery rate of the phosphoric acid are different, and the agriculture and forestry wastes are taken as the carbon source, and the carbonization temperature is 500-1000 ℃, P2O5The content of the phosphoric acid in the biomass charcoal is between 2 and 22 percent, and the recovery rate of the phosphoric acid is between 0.5 and 100 percent. When animal waste, activated sludge and kitchen garbage are used as carbon sources and the carbonization temperature is 500-1000 ℃, P2O5The content of the phosphoric acid in the biomass charcoal is between 0 and 12.5 percent, and the recovery rate of the phosphoric acid is between 0 and 80 percent. When the waste liquid is carbonized at high temperature (the temperature is higher than 600 ℃), phosphoric acid in the waste liquid is gradually converted into metaphosphate. The yield and specific surface area of activated carbon decrease as the carbonization temperature increases.
By changing the types of the biomass solid wastes, different phosphoric acid derivative products can be obtained, for example, by taking animal wastes and activated sludge as biomass, and aluminum metaphosphate and silicon phosphate can be obtained at higher carbonization temperature.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method of waste treatment comprising:
mixing the acidic waste liquid with the biomass solid waste to obtain a first mixture;
obtaining a second mixture through a first preset reaction time of the first mixture at a first preset temperature;
carbonizing the second mixture in a nitrogen atmosphere to obtain a third mixture;
and washing the third mixture to obtain the activated carbon, the inorganic acid and the inorganic acid salt.
2. The method of claim 1, wherein the first predetermined temperature comprises 100 to 350 ℃ and the first predetermined reaction time comprises 0.5 to 12 hours.
3. The method of claim 1, wherein the first and second light sources are selected from the group consisting of,
wherein the second mixture is carbonized in a nitrogen atmosphere to obtain a third mixture, and the third mixture comprises:
and heating the second mixture for 0.5-6 h at 500-1000 ℃ in a nitrogen atmosphere to obtain a third mixture.
4. The method of claim 1, wherein the washing the third mixture to obtain activated carbon, an inorganic acid, and an inorganic acid salt comprises:
washing the third mixture by deionized water until the washing liquid is neutral to obtain a water phase mixture and a solid phase mixture;
performing ion exchange and concentration treatment on the water phase mixture to obtain inorganic acid;
washing the solid phase mixture by deionized water to obtain suspension and active carbon;
and filtering the suspension to obtain the inorganic acid salt.
5. The method of claim 4, wherein the washing the solid phase mixture with deionized water to obtain a suspension and activated carbon comprises:
washing the solid phase mixture by deionized water to obtain suspension and solid matters;
and drying the solid substance at a second preset temperature to obtain the activated carbon.
6. The method of claim 5, wherein the second predetermined temperature comprises 60-120 ℃.
7. The method of claim 1, wherein the mixing the acidic waste liquid with the biomass solid waste to obtain a first mixture comprises: mixing the acidic waste liquid and the biomass solid waste with 0.3-10 kg of the biomass solid waste per liter to obtain the first mixture.
8. The method of claim 1, wherein the acidic waste stream comprises at least one of: the acid waste liquid containing phosphoric acid, the mixed acid waste liquid containing phosphoric acid and sulfuric acid, and the mixed acid waste liquid containing phosphoric acid and hydrochloric acid.
9. The method of claim 1, wherein the biomass solid waste comprises at least one of: agricultural wastes, animal wastes, kitchen wastes, and activated sludge.
10. The method of claim 1, wherein the inorganic salt comprises at least one of: aluminum metaphosphate, silicon phosphate, sodium metaphosphate, potassium metaphosphate, and calcium metaphosphate.
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