Garbage leachate treatment material and garbage leachate treatment process

Abstract

The invention discloses a landfill leachate treatment material, which comprises a nanocellulose composite aerogel adsorbent and a binder, and further comprises an artificial synthetic material, a magnetic material, a high-molecular compound, a synthetic high-molecular material and a natural adsorption material, which are prepared to form an integral structure material. The composite material is used for heavy metal adsorption treatment of the landfill leachate, various natural and synthetic materials are combined to prepare a treatment material capable of adsorbing heavy metals in various landfill leachate, and the efficiency of adsorbing the heavy metals in the landfill leachate can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of landfill leachate treatment, in particular to a landfill leachate treatment material and a landfill leachate treatment process. Background Art

[0002] Landfill leachate is a high-concentration organic wastewater with complex components. In particular, the mid- and late-stage landfill leachate has the characteristics of high ammonia nitrogen content, poor biodegradability, imbalanced ratio of microbial nutrients, and high heavy metal content. Therefore, the harmless treatment of landfill leachate has always been a global problem. At present, the main methods for treating landfill leachate are physical and chemical methods, biological treatment methods, and land methods, among which biological treatment methods are widely used. However, since landfill leachate contains a variety of toxic and harmful organic substances that are difficult to degrade, especially the poor biodegradability of late-stage leachate, it is not suitable for aerobic biological treatment. In addition, physical treatment methods such as adsorption and membrane filtration are not widely used due to their high costs.

[0003] Heavy metals are one of the harmful substances in landfill leachate. Currently, there are many adsorption materials that can adsorb a variety of heavy metals, such as activated carbon, montmorillonite, kaolinite, illite, polyvinyl alcohol (PVA), polyacrylamide (PAM), and certain polymer compounds. However, each substance has its own characteristics. A single material cannot adsorb all heavy metals. It requires a combination of multiple materials to have the possibility of adsorbing multiple heavy metal substances. Summary of the invention

[0004] The present invention aims at the above problems and proposes a landfill leachate treatment material and a landfill leachate treatment process to solve the above problems.

[0005] In order to achieve the above technical objectives, the present invention adopts a landfill leachate treatment material, including a nanocellulose composite aerogel adsorbent and a binder. The landfill leachate treatment material also includes artificial synthetic materials, magnetic materials, polymer compounds, synthetic polymer materials and natural adsorption materials. After preparation, an integral structural material is formed for heavy metal adsorption treatment of landfill leachate.

[0006] Preferably, the artificial synthetic material is a molecular sieve powder material.

[0007] Further preferably, the magnetic material is a mixture of nano-iron tetroxide crystal material and powder material obtained by solidifying magnetic soap solution.

[0008] More preferably, the polymer compound is a mixture of microcrystalline cellulose powder and ion exchange resin powder.

[0009] More preferably, the synthetic polymer material is a mixture of polyvinyl alcohol powder and polyacrylamide powder.

[0010] More preferably, the natural adsorption material comprises: a mixture of activated carbon powder, montmorillonite powder, kaolinite powder, illite powder, chitosan powder and lignin powder.

[0011] On the basis of the above, the present invention also discloses a method for preparing a landfill leachate treatment material, comprising the following steps:

[0012] Step 1: Put a certain amount of a mixture of microcrystalline cellulose powder and ion exchange resin powder, a mixture of molecular sieve powder material, a mixture of nano-iron tetroxide crystal material and magnetic soap solution solidified powder material, a mixture of microcrystalline cellulose powder and ion exchange resin powder, a mixture of polyvinyl alcohol powder, a mixture of polyacrylamide powder, activated carbon powder, montmorillonite powder, kaolinite powder, illite powder, chitosan powder, and lignin powder into a blender and mix them thoroughly; Step 2: Add a certain amount of binder and water to the mixture after being fully mixed in step 1, and continue stirring in the blender for 30-50 minutes;

[0013] Step 3: Place the mixture from step 2 in an oven at 80-120° for 3-5 hours to prepare a leachate treatment material;

[0014] Step 4: prepare a lifting frame with several hollow partitions, lay the nanocellulose composite aerogel adsorbent on the first layer of hollow partitions; place the landfill leachate treatment material prepared in step 3 on the remaining hollow partitions at the bottom.

[0015] In practical application, the preparation material and the device of the present invention are placed at the bottom of the landfill leachate.

[0016] After the above technical improvements, the present invention has the following advantages:

[0017] 1. The present invention combines a variety of natural and synthetic materials to prepare a treatment material that can adsorb a variety of heavy metals in landfill leachate, which can greatly improve the efficiency of heavy metal adsorption in landfill leachate;

[0018] 2. The preparation method of the present invention is simple, does not require complicated multi-process and use of multiple additives and catalysts, and reduces the cost of material preparation;

[0019] 3. The present invention is convenient to use. The materials are placed layer by layer in the lifting frame through the height-adjustable lifting frame. The height of the lifting frame can be adjusted according to the flow rate of the garbage leachate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a diagram of the steps for preparing the material of the present invention; DETAILED DESCRIPTION

[0021] In order to make the purpose and technical solution of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings and by selecting some data as examples. It should be understood that the selected data here are only used to assist in explaining the present invention and are not used to limit the present invention.

[0022] Example 1

[0023] Combination Figure 1 It can be seen that a landfill leachate treatment material includes a nanocellulose composite aerogel adsorbent and a binder. The landfill leachate treatment material also includes artificial synthetic materials, magnetic materials, polymer compounds, synthetic polymer materials and natural adsorption materials. After preparation, an integral structural material is formed for heavy metal adsorption treatment of landfill leachate.

[0024] In the present invention, the preferred artificial synthetic material is a molecular sieve powder material. The preferred magnetic material is a mixture of nano-iron tetroxide crystal material and a powder material solidified from a magnetic soap solution. The preferred polymer compound is a mixture of microcrystalline cellulose powder and ion exchange resin powder. Preferably, the synthetic polymer material is a mixture of polyvinyl alcohol powder and polyacrylamide powder. The preferred natural adsorption materials include: a mixture of activated carbon powder, montmorillonite powder, kaolinite powder, illite powder, chitosan powder, and lignin powder.

[0025] On the basis of the above, the present invention also discloses a method for preparing a landfill leachate treatment material, comprising the following steps:

[0026] Step 1: Put a certain amount of a mixture of microcrystalline cellulose powder and ion exchange resin powder, a mixture of molecular sieve powder material, a mixture of nano-iron tetroxide crystal material and magnetic soap solution solidified powder material, a mixture of microcrystalline cellulose powder and ion exchange resin powder, a mixture of polyvinyl alcohol powder, a mixture of polyacrylamide powder, activated carbon powder, montmorillonite powder, kaolinite powder, illite powder, chitosan powder, and lignin powder into a blender and mix them thoroughly; Step 2: Add a certain amount of binder and water to the mixture after being fully mixed in step 1, and continue stirring in the blender for 30-50 minutes;

[0027] Step 3: Place the mixture from step 2 in an oven at 80° for 3 hours to prepare a leachate treatment material;

[0028] Step 4: prepare a lifting frame with several hollow partitions, lay the nanocellulose composite aerogel adsorbent on the first layer of hollow partitions; place the landfill leachate treatment material prepared in step 3 on the remaining hollow partitions at the bottom.

[0029] In practical application, the preparation material and the device of the present invention are placed at the bottom of the landfill leachate.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A landfill leachate treatment material, comprising a nanocellulose composite aerogel adsorbent and a binder, characterized in that: The landfill leachate treatment material also includes artificial synthetic materials, magnetic materials, polymer compounds, synthetic polymer materials and natural adsorption materials, which are prepared to form an integral structural material for heavy metal adsorption treatment of landfill leachate.

2. A landfill leachate treatment material as claimed in claim 1, characterized in that: The artificial synthetic material is a molecular sieve powder material.

3. The landfill leachate treatment material according to claim 1, characterized in that: The magnetic material is a mixture of nanometer ferroferric oxide crystal material and powder material solidified by magnetic soap liquid.

4. The landfill leachate treatment material according to claim 1, characterized in that: The polymer compound is a mixture of microcrystalline cellulose powder and ion exchange resin powder.

5. The landfill leachate treatment material according to claim 1, characterized in that: The synthetic polymer material is a mixture of polyvinyl alcohol powder and polyacrylamide powder.

6. The landfill leachate treatment material according to claim 1, characterized in that: The natural adsorption material comprises: a mixture of activated carbon powder, montmorillonite powder, kaolinite powder, illite powder, chitosan powder and lignin powder.

7. A method for preparing the landfill leachate treatment material according to claims 1-6, characterized in that: The steps include: Step 1: Put a certain amount of a mixture of microcrystalline cellulose powder and ion exchange resin powder, a mixture of molecular sieve powder material, a mixture of nano-iron tetroxide crystal material and magnetic soap solution solidified powder material, a mixture of microcrystalline cellulose powder and ion exchange resin powder, a mixture of polyvinyl alcohol powder and polyacrylamide powder, activated carbon powder, montmorillonite powder, kaolinite powder, illite powder, chitosan powder, and lignin powder into a blender and mix them thoroughly; Step 2: Add a certain amount of binder and water to the mixture obtained by fully mixing in step 1, and continue to stir in the mixer for 30-50 minutes; Step 3: Place the mixture from step 2 in an oven at 80-120° for 3-5 hours to prepare a leachate treatment material; Step 4: prepare a lifting frame with several hollow partitions, lay the nanocellulose composite aerogel adsorbent on the first layer of hollow partitions; place the landfill leachate treatment material prepared in step 3 on the remaining hollow partitions at the bottom.

8. A landfill leachate treatment process using the landfill leachate treatment material according to claims 1-7, characterized in that: The device in step 4 of claim 6 is placed at the bottom of the landfill leachate.

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