Sewage treatment flocculant and preparation method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment flocculant and a preparation method thereof.The sewage treatment flocculant comprises an organic flocculant and an inorganic flocculant, and the sewage treatment flocculant is formed by evenly mixing the powdery organic flocculant and the inorganic flocculant according to the relative weight part; the organic flocculating agent comprises sodium polyacrylate, anionic polyacrylamide, 95% ethanol and a dispersing agent; the inorganic flocculant comprises polyaluminum chloride, polyferric sulfate, ferrous sulfate and calcium chloride; according to the sewage treatment flocculating agent, an inorganic flocculating agent and an organic flocculating agent can be organically combined and dissolved into sewage at the same time, the problem that wrapping is easily caused when the inorganic flocculating agent and the organic flocculating agent are added at the same time is solved, the sewage treatment quality is improved, the process is simplified, the dosage of the flocculating agents is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, in particular to a sewage treatment flocculant and a preparation method thereof. Background Art

[0002] When using multiple flocculants for sewage treatment in existing technologies, the optimal order of addition needs to be determined through experiments. When inorganic flocculants are used in combination with organic flocculants, the inorganic flocculant should be added first, followed by the organic flocculant. Generally speaking, the flocculation process of sewage treatment is divided into three stages: charge neutralization, adsorption bridging, and net capture and sweeping. In the initial stage of flocculation, due to the addition of inorganic flocculants, the high-valent cations (such as Al³⁺ and Fe³⁺) in the coagulant quickly neutralize the negative charge on the colloid surface, eliminating the electrostatic repulsion between particles. This process causes the originally stable microparticles (1-100nm) to form micro-flocs with a diameter of about 0.6-1mm. However, the flocs are loose at this time and cannot be effectively settled. When organic polymers are added, the adsorption and bridging effect of polymer flocculants (such as polyacrylamide) or the netting effect of the formed metal hydroxide precipitates are used to combine the micro-flocs. At this stage, the floc size can increase to 2-5mm, forming dense alum flocs. The settling rate is increased by 10-100 times, thus completing the entire flocculation process. According to common knowledge and practical experience, in the process of sewage treatment, if Figure 1 The sewage shown in the figure can quickly precipitate most of the solid insoluble matter (usually called SS) in the wastewater with the effective combination of inorganic flocculants and organic flocculants. Figure 2 As shown, the purpose of clarifying the water body is achieved; however, the inorganic flocculant and the organic flocculant must be dissolved separately and added successively to achieve flocculation. If the inorganic flocculant and the organic flocculant are added to the sewage at the same time, they will form entanglements and cannot completely and effectively remove impurities in the wastewater; therefore, how to organically combine the inorganic flocculant and the organic flocculant and dissolve them into the sewage at the same time to improve the quality of sewage treatment, which can simplify the process and reduce the amount of flocculants used, is a current research issue in sewage treatment. Summary of the Invention

[0003] The purpose of the present invention is to solve the problem of how to organically combine inorganic flocculants and organic flocculants and dissolve them into sewage at the same time, thereby improving the quality of sewage treatment, simplifying the process and reducing the amount of flocculants used.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: a sewage treatment flocculant, comprising an organic flocculant and an inorganic flocculant, wherein the sewage treatment flocculant is formed by uniformly mixing the powdered organic flocculant and the inorganic flocculant in relative weight parts; The organic flocculant includes sodium polyacrylate, anionic polyacrylamide, 95% ethanol, and a dispersant; The inorganic flocculants include polyaluminum chloride, polyferric sulfate, ferrous sulfate, and calcium chloride.

[0005] Further, the weight ratio of the organic flocculants is 3 parts of sodium polyacrylate, 4 parts of anionic polyacrylamide, 2.95 parts of 95% ethanol, and 0.5 parts of dispersant.

[0006] Further, the organic flocculants need to be stirred and reacted in a clean sealed container for 2 hours.

[0007] Further, after the reaction of the organic flocculants, the filtered substances are laid flat and dried at a constant temperature.

[0008] Further, the weight ratio of the components in the organic flocculants and the inorganic flocculants in the sewage treatment flocculant is 58-62 parts of polyaluminum chloride, 13-17 parts of polyferric sulfate, 15-19 parts of ferrous sulfate, 3-4 parts of calcium chloride, and 3-5 parts of organic flocculants.

[0009] The above-mentioned sewage treatment flocculant preparation method comprises the following steps: First, 3 parts of sodium polyacrylate, 4 parts of anionic polyacrylamide, 2.95 parts of 95% ethanol, and 0.5 parts of dispersant are placed in a clean sealed container and stirred and reacted for 2 hours; Then, after the reaction, the filtered substances are laid flat and dried at a constant temperature; Finally, 58-62 parts of polyaluminum chloride, 13-17 parts of polyferric sulfate, 15-19 parts of ferrous sulfate, 3-4 parts of calcium chloride, and 3-5 parts of organic flocculants are mixed uniformly, weighed, and packaged.

[0010] Further, the powder-like sewage treatment flocculant prepared by the sewage treatment flocculant preparation method is filtered using a 100-mesh sieve.

[0011] The sewage treatment flocculant of the present application has the following advantages: compared with the prior art, the sewage treatment flocculant of the present application can combine inorganic flocculants with organic flocculants and dissolve in sewage at the same time, thereby improving the quality of sewage treatment, simplifying the process, reducing the amount of flocculants, and reducing production costs. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a picture of a sewage sample to be treated; Figure 2 is a picture of sewage treated by the prior art; Figure 3 is a picture of sewage treated by the sewage treatment flocculant of the present application. DETAILED DESCRIPTION

[0013] The technical solutions of the present application will be described clearly and completely in combination with the drawings.

[0014] Example 1, the composition ratio and effect of the inorganic flocculant in the sewage treatment flocculant of the present application; the inorganic flocculant of the present application is composed of polyaluminum chloride, polyferric sulfate, ferrous sulfate and calcium chloride, and its function is charge neutralization, which makes the originally stable micro-particles (1-100 nm) in sewage form micro-flocs with a diameter of about 0.6-1 mm, and the floc structure is loose and in a suspended state. From the composition ratio and effect table of the inorganic flocculant in Table 1, through comparison of the four groups of examples, it can be seen that the observation effect of the fourth group of examples is optimal.

[0015] Table 1, composition ratio and effect table of inorganic flocculant

[0016] Example 2, the composition ratio and effect of the organic flocculant in the sewage treatment flocculant of the present application; the organic flocculant of the present application is composed of sodium polyacrylate, anionic polyacrylamide, 95% ethanol and dispersant, and its function is adsorption bridging, net trapping and sweeping, which makes the micro-flocs combine with each other, the floc size can be increased to 2-5 mm, dense alunite flowers are formed, and the settling velocity is increased by 10-100 times, thereby completing the entire flocculation process; wherein the function of ethanol is to modify the organic flocculant, and the function of the dispersant is to uniformly distribute the modified organic flocculant in the inorganic flocculant. From the composition ratio and effect table of the organic flocculant in Table 2, through comparison of the four groups of examples, it can be seen that the observation effect of the fourth group of examples is optimal.

[0017] Table 2, composition ratio and effect table of organic flocculant

[0018] Example 3, the preparation method of the sewage treatment flocculant of the present application; Through comparison of the examples in Table 1 and Table 2, the optimal flocculant composition ratio is selected to prepare the flocculant, and the method is as follows: First, 3 parts of sodium polyacrylate, 4 parts of anionic polyacrylamide, 2.95 parts of 95% ethanol and 0.5 parts of dispersant are placed in a clean sealed container and stirred and reacted for 2 hours; Then, after the reaction is completed, the filtered material is placed flat and dried at a constant temperature. Finally, 58-62 parts of polyaluminum chloride, 13-17 parts of polyferric sulfate, 15-19 parts of ferrous sulfate, 3-4 parts of calcium chloride and 3-5 parts of organic flocculant are mixed uniformly, filtered with a 100-mesh sieve, weighed and packaged.

[0019] In this embodiment 3, the flocculants prepared by the sewage treatment flocculant preparation method of the application are added into the sewage as shown in Figure 1 after a proper reaction time, the pictures as shown in Figure 3 are obtained, which are compared with Figure 2 The solid insoluble substances are more compactly precipitated in the wastewater, and the water body is clearer and more transparent.

[0020] The above merely describes the preferred embodiments of the application, and is not used to limit the application, and any simple modification, equivalent replacement, improvement, etc. within the technical concept of the application shall be included in the protection scope of the application.

Claims

1. A sewage treatment flocculant, comprising an organic flocculant and an inorganic flocculant, characterized in that: The sewage treatment flocculant is formed by uniformly mixing powdered organic flocculant and inorganic flocculant in relative weight parts; The organic flocculant includes sodium polyacrylate, anionic polyacrylamide, 95% ethanol, and a dispersant; The inorganic flocculants include polyaluminium chloride, polyferric sulfate, ferrous sulfate and calcium chloride.

2. A sewage treatment flocculant according to claim 1, characterized in that: The weight ratio of the organic flocculant is: 3 parts of sodium polyacrylate, 4 parts of anionic polyacrylamide, 2.95 parts of 95% ethanol, and 0.5 parts of dispersant.

3. A sewage treatment flocculant according to claim 2, characterized in that: The organic flocculant needs to be placed in a clean sealed container and stirred and reacted for 2 hours.

4. A sewage treatment flocculant according to claim 3, characterized in that: After the reaction of the organic flocculant is completed, it needs to be filtered through a fine sieve, and the filtered material is spread out and dried at a constant temperature.

5. A sewage treatment flocculant according to claim 4, characterized in that: In the sewage treatment flocculant, the weight ratio of the components of the organic flocculant and the inorganic flocculant is: 58-62 parts of polyaluminum chloride, 13-17 parts of polyferric sulfate, 15-19 parts of ferrous sulfate, 3-4 parts of calcium chloride, and 3-5 parts of organic flocculant.

6. A method for preparing a sewage treatment flocculant according to claim 5, characterized in that The preparation method comprises the following steps: First, mix 3 parts of sodium polyacrylate, 4 parts of anionic polyacrylamide, 2.95 parts of 95% ethanol, and 0.5 parts of dispersant in a clean sealed container, stir, and react for 2 hours; After the reaction is completed, filter with a fine sieve, lay the filtered material flat, and dry it at a constant temperature; Finally, 58-62 parts of polyaluminium chloride, 13-17 parts of polyferric sulfate, 15-19 parts of ferrous sulfate, 3-4 parts of calcium chloride and 3-5 parts of organic flocculant are mixed in proportion by weight, and the mixture is evenly mixed and weighed and packaged.

7. The method for preparing a sewage treatment flocculant according to claim 6, characterized in that: The powdered sewage treatment flocculant prepared by the sewage treatment flocculant preparation method is filtered using a 100-mesh filter.

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