Auxiliary agent for sewage treatment of slaughter house and sewage treatment method

Abstract

The invention relates to the technical field of sewage treatment, and provides an auxiliary agent for sewage treatment of a slaughter house and a sewage treatment method. The auxiliary agent for slaughter house sewage treatment comprises the following components in parts by mass: 40-60 parts of modifier modified zeolite, 30-50 parts of adsorptive resin, 10-20 parts of polysilicate metal salt and 10-20 parts of layered aluminosilicate minerals, and a modifier in the modifier modified zeolite is an organic matter containing phenyl and carboxyl. By means of the technical scheme, the problem that in the prior art, a slaughter house sewage treatment agent is poor in organic matter removal effect is solved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an additive for treating wastewater from slaughterhouses and a wastewater treatment method. Background Technology

[0002] Slaughterhouses inevitably generate large amounts of wastewater, which contains significant amounts of organic matter such as animal fat. If left untreated, this organic matter not only pollutes the environment but can also enter the human body through various pathways, harming health. Therefore, removing organic matter from slaughterhouse wastewater is a crucial step in wastewater treatment. Currently, the removal of organic matter from slaughterhouse wastewater is mostly achieved by adding additives. These additives separate organic matter through adsorption, but their treatment effect is generally limited and the cost is high. Therefore, there is an urgent need for a slaughterhouse wastewater treatment additive that offers effective and cost-efficient removal of organic matter. Summary of the Invention

[0003] This invention proposes an additive for slaughterhouse wastewater treatment and a wastewater treatment method, which solves the problem of poor organic matter removal efficiency of slaughterhouse wastewater treatment agents in related technologies.

[0004] The technical solution of the present invention is as follows: This invention proposes an auxiliary agent for treating slaughterhouse wastewater, comprising the following components in parts by weight: 40-60 parts of modified zeolite, 30-50 parts of adsorbent resin, 10-20 parts of polysilicate metal salt, and 10-20 parts of layered aluminosilicate mineral, wherein the modifier in the modified zeolite is an organic compound containing phenyl and carboxyl groups.

[0005] As a further technical solution, the organic compound containing phenyl and carboxyl groups includes a first organic compound containing phenyl and carboxyl groups and a second organic compound containing phenyl and carboxyl groups in a mass ratio of 1:9 to 9:1. The first organic compound containing phenyl and carboxyl groups includes one of 5-phenylpentanoic acid, 7-phenylheptanoic acid, and 9-phenylnonanoic acid. The second organic compound containing phenyl and carboxyl groups includes one of 12-phenyldodecanoic acid, 15-phenylpentadecanoic acid, and 18-phenyloctadecanoic acid.

[0006] In this invention, a first organic compound containing phenyl and carboxyl groups and a second organic compound containing phenyl and carboxyl groups are used in a mass ratio of 1:9 to 9:1. The first organic compound containing phenyl and carboxyl groups is limited to one of 5-phenylpentanoic acid, 7-phenylheptanoic acid, and 9-phenylnonanoic acid, and the second organic compound containing phenyl and carboxyl groups is limited to one of 12-phenyldodecanoic acid, 15-phenylpentadecanoic acid, and 18-phenyloctadecanoic acid. The two synergistically enhance the removal of organic matter by the adjuvant for slaughterhouse wastewater treatment.

[0007] As a further technical solution, the first organic compound containing phenyl and carboxyl groups is 7-phenylheptanoic acid, and the second organic compound containing phenyl and carboxyl groups is 15-phenylpentadecanoic acid.

[0008] In this invention, the removal effect of the auxiliary agent for slaughterhouse wastewater treatment is further enhanced by specifying that the first organic compound containing phenyl and carboxyl groups is 7-phenylheptanoic acid and the second organic compound containing phenyl and carboxyl groups is 15-phenylpentadecanoic acid.

[0009] As a further technical solution, the mass ratio of the first organic compound containing phenyl and carboxyl groups and the second organic compound containing phenyl and carboxyl groups is 1:4 to 4:1.

[0010] In this invention, the removal effect of the auxiliary agent for slaughterhouse wastewater treatment is further enhanced by limiting the mass ratio of 7-phenylheptanoic acid and 15-phenylpentadecanoic acid to 1:4 to 4:1.

[0011] As a further technical solution, the raw materials for the modifier-modified zeolite include a modifier and zeolite in a mass ratio of 1~5:100.

[0012] As a further technical solution, the polysilicate metal salt includes one or more of polyaluminum silicate, polyferric silicate, polyaluminum iron silicate, polyaluminum magnesium silicate, polyaluminum zinc silicate, polymagnesium iron silicate, polyferric iron silicate, and polyaluminum titanium sulfate.

[0013] As a further technical solution, the adsorbent resin includes one or more of polymethyl methacrylate, polyacrylamide, polyvinylpyridine, and styrene-divinylbenzene copolymer.

[0014] As a further technical solution, the layered aluminosilicate minerals include one or more of montmorillonite, pyrophyllite, kaolinite, hydromica, and chlorite.

[0015] As a further technical solution, the preparation method of the modifier-modified zeolite includes the following steps: dissolving the modifier in dimethyl sulfoxide, adding zeolite and mixing evenly, filtering, and drying to obtain the modifier-modified zeolite.

[0016] This invention proposes a method for preparing an auxiliary agent for slaughterhouse wastewater treatment, comprising the following steps: uniformly mixing a modifier-modified zeolite, an adsorbent resin, a polysilicate metal salt, and layered aluminosilicate minerals to obtain the auxiliary agent for slaughterhouse wastewater treatment.

[0017] This invention proposes a wastewater treatment method, comprising the following steps: adding the wastewater treatment adjuvant or the wastewater treatment adjuvant prepared by the aforementioned preparation method to the wastewater in the slaughterhouse.

[0018] The working principle and beneficial effects of this invention are as follows: In this invention, compounds containing phenyl and carboxyl groups are selected as modifiers to modify zeolite, an adsorbent porous material. The hydrophilic hydroxyl groups on the surface of the zeolite are connected to the carboxyl groups at one end of the modifier through hydrogen bonds, thereby exposing the lipophilic phenyl groups of the modifier on the surface of the modified zeolite. By modifying the hydrophilic groups on the surface of the zeolite into lipophilic groups and adding components such as adsorbent resin, polysilicate metal salt, and layered aluminosilicate minerals, a slaughterhouse wastewater treatment adjuvant is prepared. By designing and optimizing the amount of each component added to the wastewater treatment adjuvant, the effect of removing organic matter by the wastewater treatment adjuvant is enhanced. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] The parameters of the raw materials used in the following examples and comparative examples are as follows: The weight-average molecular weight of polymethyl methacrylate is 100,000. The number-average molecular weight of polyacrylamide is 8,000,000. The number average molecular weight of polyvinylpyridine is 60,000. Polyaluminum silicate: Item No. 0031121, Manufacturer: Zhengzhou Jingfan Environmental Protection Technology Co., Ltd. Zeolite: NaY synthetic zeolite, bulk density 0.3 g / mL, relative crystallinity 90%, cell constant 24.64 μm, SiO2 / Al2O3 ratio 5.0, specific surface area 650 m² 2 The particles, with a D50 particle size of 5.2 μm and a pore volume of 0.36 mL / g, were purchased from Zibo Runxin Chemical Technology Co., Ltd. The particle size of montmorillonite is 325 mesh. The grain size of pyrophyllite is 1250 mesh; The particle size of the kaolinite is 800 mesh.

[0021] Example 1 An auxiliary agent for treating slaughterhouse wastewater, the preparation method of which includes the following steps: S1. Dissolve 5 parts of 5-phenylpentanoic acid in 700 parts of dimethyl sulfoxide, add 100 parts of zeolite, mix evenly, and dry to obtain modifier-modified zeolite. S2. Mix 40 parts of modified zeolite, 10 parts of polymethyl methacrylate, 10 parts of polyacrylamide, 10 parts of polyvinylpyridine, 10 parts of polyaluminum silicate, 5 parts of montmorillonite, 3 parts of pyrophyllite, and 2 parts of kaolinite in a mixer to obtain an auxiliary agent for slaughterhouse wastewater treatment.

[0022] Example 2 An auxiliary agent for treating slaughterhouse wastewater, the preparation method of which includes the following steps: S1. Dissolve 1 part of 5-phenylpentanoic acid in 700 parts of dimethyl sulfoxide, add 100 parts of zeolite, mix evenly, and dry to obtain modifier-modified zeolite. S2. Mix 60 parts of modified zeolite, 20 parts of polymethyl methacrylate, 20 parts of polyacrylamide, 10 parts of polyvinylpyridine, 20 parts of polyaluminum silicate, 10 parts of montmorillonite, 5 parts of pyrophyllite, and 5 parts of kaolinite in a mixer to obtain an auxiliary agent for slaughterhouse wastewater treatment.

[0023] Example 3 An auxiliary agent for treating slaughterhouse wastewater, the preparation method of which includes the following steps: S1. Dissolve 0.5 parts of 5-phenylpentanoic acid and 4.5 parts of 12-phenyldodecanic acid in 700 parts of dimethyl sulfoxide, add 100 parts of zeolite, mix evenly, and dry to obtain modifier-modified zeolite. S2. Mix 40 parts of modified zeolite, 10 parts of polymethyl methacrylate, 10 parts of polyacrylamide, 10 parts of polyvinylpyridine, 10 parts of polyaluminum silicate, 5 parts of montmorillonite, 3 parts of pyrophyllite, and 2 parts of kaolinite in a mixer to obtain an auxiliary agent for slaughterhouse wastewater treatment.

[0024] Example 4 Compared to Example 1, Example 4 replaces 5-phenylpentanoic acid with an equal amount of 12-phenyldodecanic acid, otherwise it is the same as Example 1.

[0025] Example 5 Compared to Example 3, Example 5 replaces 12-phenyldodecanoic acid with an equal amount of 15-phenylpentadecanoic acid, otherwise it is the same as Example 1.

[0026] Example 6 Compared to Example 3, Example 6 replaces 12-phenyldodecanoic acid with an equal amount of 18-phenyloctadecanoic acid, otherwise it is the same as Example 3.

[0027] Example 7 Compared to Example 5, Example 7 replaces 5-phenylpentanoic acid with an equal amount of 7-phenylheptanoic acid, otherwise it is the same as Example 5.

[0028] Example 8 Compared to Example 5, Example 8 replaces 5-phenylpentanoic acid with an equal amount of 9-phenylnonanoic acid, otherwise it is the same as Example 5.

[0029] Example 9 The difference between Example 9 and Example 7 is that 7-phenylheptanoic acid is 1 part and 15-phenylpentadecanoic acid is 4 parts, while the rest is the same as in Example 7.

[0030] Example 10 Compared with Example 7, Example 10 differs in that 4 parts of 7-phenylheptanoic acid and 1 part of 15-phenylpentadecanoic acid are used, while the rest is the same as in Example 7.

[0031] Example 11 Compared with Example 7, Example 11 differs in that 7-phenylheptanoic acid is 4.5 parts and 15-phenylpentadecanoic acid is 0.5 parts, while the rest is the same as in Example 7.

[0032] Comparative Example 1 An auxiliary agent for slaughterhouse wastewater treatment, the preparation method of which includes the following steps: mixing 40 parts of zeolite, 10 parts of polymethyl methacrylate, 10 parts of polyacrylamide, 10 parts of polyvinylpyridine, 10 parts of polyaluminum silicate, 5 parts of montmorillonite, 3 parts of pyrophyllite, and 2 parts of kaolinite in a mixer until homogeneous, thereby obtaining the auxiliary agent for slaughterhouse wastewater treatment.

[0033] Test case The slaughterhouse wastewater treatment adjuvants from Examples 1-11 and Comparative Example 1 were added to the slaughterhouse wastewater at a ratio of 2 g:1 L. After 3 days of treatment, the COD content in the wastewater before and after treatment was detected according to the method in HJ828-2017, and the SS content in the wastewater before and after treatment was detected according to the method in GB / T 11901-1989. The removal rate was calculated according to the following formula: Removal rate (%) = (before treatment - after treatment) ÷ before treatment × 100; The results are shown in Table 1.

[0034] Table 1. Test results of the effect of the auxiliary agents for slaughterhouse wastewater treatment in Examples 1-11 and Comparative Example 1 on the wastewater treatment capacity of slaughterhouses.

[0035] Compared with Comparative Example 1, the modified zeolite in Example 1, which was modified with compounds containing phenyl and carboxyl groups, showed that the COD and SS removal rates of the slaughterhouse wastewater treated by the auxiliary agent prepared in Example 1 were higher than those in Comparative Example 1. This indicates that the modification of zeolite with compounds containing phenyl and carboxyl groups can improve the removal efficiency of organic matter by the auxiliary agent for slaughterhouse wastewater treatment.

[0036] The COD and SS removal rates of the slaughterhouse wastewater treatment adjuvant prepared in Example 3 were higher than those in Examples 1 and 4. This indicates that the organic matter removal effect of the slaughterhouse wastewater treatment adjuvant can be improved by using a combination of a first organic compound containing phenyl and carboxyl groups and a second organic compound containing phenyl and carboxyl groups in a mass ratio of 1:9 to 9:1.

[0037] The COD and SS removal rates of the slaughterhouse wastewater treatment adjuvant prepared in Example 7 were higher than those in Examples 3, 5, 6 and 8, indicating that by limiting the compounds containing phenyl and carboxyl groups to 7-phenylheptanoic acid and 15-phenylpentadecanoic acid, the removal effect of the slaughterhouse wastewater treatment adjuvant can be enhanced.

[0038] The COD and SS removal rates of the slaughterhouse wastewater treatment adjuvants prepared in Examples 9 and 10 were higher than those in Examples 7 and 11, indicating that limiting the mass ratio of 7-phenylheptanoic acid to 15-phenylpentadecanoic acid to 1:4 to 4:1 can enhance the removal effect of organic matter by the slaughterhouse wastewater treatment adjuvants.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An auxiliary agent for slaughterhouse wastewater treatment, characterized in that: The invention comprises the following components in parts by weight: 40-60 parts of a modifier-modified zeolite, 30-50 parts of an adsorptive resin, 10-20 parts of a polysilicate metal salt and 10-20 parts of a layered aluminum silicate mineral. The modifier in the modifier-modified zeolite is an organic substance containing phenyl and carboxyl groups.

2. The auxiliary agent for slaughterhouse wastewater treatment according to claim 1, characterized in that: The organic matter containing phenyl and carboxyl groups includes a first organic matter containing phenyl and carboxyl groups and a second organic matter containing phenyl and carboxyl groups in a mass ratio of 1:9 to 9:1, the first organic matter containing phenyl and carboxyl groups includes one of 5-phenylpentanoic acid, 7-phenylheptanoic acid, and 9-phenylnonanoic acid, and the second organic matter containing phenyl and carboxyl groups includes one of 12-phenyldodecanoic acid, 15-phenylpentadecanoic acid, and 18-phenyloctadecanoic acid.

3. The auxiliary agent for slaughterhouse wastewater treatment according to claim 2, characterized in that: The first organic substance containing phenyl groups and carboxyl groups is 7-phenylheptanoic acid, and the second organic substance containing phenyl groups and carboxyl groups is 15-phenylpentadecanoic acid.

4. The auxiliary agent for slaughterhouse wastewater treatment according to claim 3, characterized in that: The mass ratio of the first organic matter containing phenyl groups and carboxyl groups to the second organic matter containing phenyl groups and carboxyl groups is 1:4-4:

1.

5. The auxiliary agent for slaughterhouse wastewater treatment according to claim 1, characterized in that: The raw materials of the modifier-modified zeolite include the modifier and zeolite in a mass ratio of 1 to 5:

100.

6. The auxiliary agent for slaughterhouse wastewater treatment according to claim 1, characterized in that: The adsorptive resin includes one or more of polymethyl methacrylate, polyacrylamide, polyvinyl pyridine, and styrene-divinylbenzene copolymer.

7. The auxiliary agent for slaughterhouse wastewater treatment according to claim 1, characterized in that: The layered aluminum silicate minerals include one or more of montmorillonite, pyrophyllite, kaolinite, hydromica and chlorite.

8. An auxiliary agent for slaughterhouse wastewater treatment according to any one of claims 1 to 7, characterized in that: The preparation method of the modifier-modified zeolite comprises the following steps: The modifier is dissolved in dimethyl sulfoxide, and the zeolite is added and mixed evenly, filtered, and dried to obtain the modifier-modified zeolite.

9. The method for preparing an auxiliary agent for slaughterhouse wastewater treatment according to any one of claims 1 to 8, characterized in that: The following steps are involved: The modifier-modified zeolite, the adsorbent resin, the polysilicate metal salt and the layered aluminum silicate mineral are uniformly mixed to obtain an auxiliary agent for slaughterhouse wastewater treatment.

10. A method for treating sewage, characterized in that: The following steps are involved: The auxiliary agent for treating slaughterhouse wastewater according to any one of claims 1 to 8 or the auxiliary agent for treating slaughterhouse wastewater prepared by the preparation method according to claim 9 is added to the slaughterhouse wastewater.

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