CN113072277B - Method for removing pollutant sediment degradation organic matters based on calcium peroxide technology - Google Patents
Method for removing pollutant sediment degradation organic matters based on calcium peroxide technology Download PDFInfo
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- CN113072277B CN113072277B CN202110329417.2A CN202110329417A CN113072277B CN 113072277 B CN113072277 B CN 113072277B CN 202110329417 A CN202110329417 A CN 202110329417A CN 113072277 B CN113072277 B CN 113072277B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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Abstract
The invention provides a method for removing pollutant sediment degradation organic matters based on a calcium peroxide technology, and relates to the technical field of environmental treatment. The method for removing the pollutant sediment degradation organic matters based on the calcium peroxide technology comprises the steps of embedding calcium peroxide and Fe into a slow-release oxygen agent 2+ And the organic chelating agent is added into the polluted bottom mud, and the slow-release oxygen agent slows down the action of calcium peroxide and water, delays the release rate of oxygen, so that the continuous degradation action of microorganisms can fully degrade the organic matters of the polluted bottom mud. The slow-release oxygen agent is used for embedding the calcium peroxide, so that the oxygen is delayed after the slow-release oxygen agent is used, the PH in the polluted sediment can reach a proper value of microorganisms, the polyhydroxyalkanoate can provide a high-quality carbon source for the proliferation of microorganisms, the contact area between the later stage of calcium oxide degradation and water is reduced, after the surface of the modified silica aerogel is converted into hydrophilicity, the buffer is further released to stabilize the PH, meanwhile, the water reaching the spherical calcium oxide is increased, and the oxygen release amount is ensured not to be reduced.
Description
Technical Field
The invention relates to the technical field of environmental treatment, in particular to a method for removing pollutant sediment degradation organic matters based on a calcium peroxide technology.
Background
Sediment is sediment of rivers and lakes, and is an important component of natural water areas. When the water area is polluted, part of pollutants in the water can be stored in the bottom mud through precipitation or particulate matter adsorption, and the pollutants are released again under proper conditions to become a secondary pollution source, and the pollution is called bottom mud pollution.
The solubility of the calcium peroxide in water is very low, the calcium peroxide reacts with water very slowly, is one of the most stable inorganic peroxides, can react with water slowly at a controllable rate and release oxygen when being contacted with an aqueous medium, and provides oxygen for degrading organic matters in polluted bottom mud, but in the actual use process of the calcium peroxide, if the calcium peroxide is directly put into the polluted bottom mud, the PH of the polluted bottom mud is directly raised, so that microorganisms in the polluted bottom mud are influenced by oxygen supply and PH, and the degradation capacity of the microorganisms in the polluted bottom mud is reduced. The existing slow-release oxygen agent for calcium peroxide ensures that the release rate of the calcium peroxide is at a stable value all the time, but after the calcium peroxide is added into the polluted bottom mud, the oxygen content in the polluted bottom mud is increased, so that the number of microorganisms is increased briefly, but the effect of the calcium peroxide and water to release oxygen is influenced by the contact area of water, so that the release amount of oxygen in the later stage of supply of the existing slow-release oxygen agent for calcium peroxide is reduced, the degradation efficiency of microorganisms is reduced, and the actual degradation speed of organic matters in the polluted bottom mud is influenced.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a method for removing pollutant sediment degradation organic matters based on a calcium peroxide technology, which solves the problem that the slow-release oxygen agent for calcium peroxide in the prior art reduces along with the contact area of oxygen release and water, so that the degradation rate of microorganisms with increased quantity is influenced by the reduction of the oxygen release rate.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: a method for removing pollutant sediment degradation organic matters based on calcium peroxide technology comprises embedding calcium peroxide and Fe into a slow-release oxygen agent 2+ And an organic chelating agent is added into the polluted bottom mud, the action of calcium peroxide and water is slowed down by a slow-release oxygen agent, and the release rate of oxygen is retarded to ensure that the continuous degradation action of microorganisms fully degrades the organic matters of the polluted bottom mud;
the slow release oxygen agent comprises the following components in parts by weight: 1 to 3 parts of sodium alginate, 10 to 20 parts of modified silica aerogel, 15 to 25 parts of polyhydroxyalkanoate, 2 to 3 parts of dichloromethane, 1 to 2 parts of buffering agent and 10 to 15 parts of hydrophobic stearic acid;
the preparation process of the slow-release oxygen agent embedded calcium peroxide comprises the following steps: adding sodium alginate, modified silica aerogel, polyhydroxyalkanoate and hydrophobic stearic acid into a stirring device, slowly adding dichloromethane and a buffer after stirring, and fully stirring for standby to prepare a slow-release oxygen agent mixture; step two, pressing the calcium peroxide powder into pellets with the diameter of 1-1.5 mm, step three, embedding the calcium peroxide pellets into a slow-release oxygen agent mixture, and then extruding and granulating.
Preferably, the modified silica aerogel is a trimethylchlorosilane modified silica aerogel.
Preferably, the buffer is potassium dihydrogen phosphate.
Preferably, the organic chelating agent is one of ethylenediamine disuccinic acid, oxalic acid, ethylenediamine tetraacetic acid and citric acid.
Preferably, the pellets made of the calcium peroxide are stored dry.
Preferably, the diameter of the granulated calcium peroxide embedded by the slow-release oxygen agent is 3-4 mm.
(III) beneficial effects
The invention provides a method for removing pollutant sediment degradation organic matters based on a calcium peroxide technology. The beneficial effects are as follows:
according to the invention, the calcium peroxide is embedded by the slow-release oxygen agent, so that the calcium peroxide slowly releases oxygen after being added into the polluted sediment, the PH in the polluted sediment reaches a proper value of microorganisms, the polyhydroxyalkanoate in the slow-release oxygen agent can provide a high-quality carbon source for the proliferation of microorganisms, the contact area between the spherical calcium oxide and water is reduced at the later stage of degradation, and the organic groups on the surface of the modified silica aerogel are degraded and converted into hydrophilicity, so that the buffer is further released to stabilize the PH, and meanwhile, the water reaching the spherical calcium oxide is increased, so that the oxygen release amount is not reduced, and the microorganisms can continuously and efficiently degrade the organic matters in the polluted sediment.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
embodiments of the present invention provideMethod for removing pollutant sediment degradation organic matters based on calcium peroxide technology, and embedding calcium peroxide and Fe into slow-release oxygen agent 2+ And ethylenediamine disuccinic acid is added into the polluted bottom mud, and the slow-release oxygen agent slows down the action of calcium peroxide and water, delays the release rate of oxygen to ensure that the continuous degradation action of microorganisms fully degrades the organic matters of the polluted bottom mud;
the slow release oxygen agent comprises the following components in parts by weight: 1 part of sodium alginate, 10 parts of trimethylchlorosilane modified silica aerogel, 15 parts of polyhydroxyalkanoate, 2 parts of dichloromethane, 1 part of potassium dihydrogen phosphate and 10 parts of hydrophobic stearic acid;
the preparation process of the slow release oxygen agent over-embedded calcium oxide comprises the following steps: firstly, adding sodium alginate, trimethylchlorosilane modified silica aerogel, polyhydroxyalkanoate and hydrophobic stearic acid into a stirring device, slowly adding dichloromethane and potassium dihydrogen phosphate after stirring, and fully stirring for standby to prepare a slow-release oxygen agent mixture; step two, pressing calcium peroxide powder into pellets with the diameter of 1-1.5 mm, step three, embedding the calcium peroxide pellets into a slow-release oxygen agent mixture, extruding and granulating, wherein the diameter of the calcium peroxide pellets is 3-4 mm, the calcium peroxide pellets can be used for degrading halogenated organic matters in polluted bottom mud, under the effects of providing high-quality carbon sources for microorganisms by polyhydroxyalkanoates and supplying calcium peroxide, the existing or added microorganisms in the polluted bottom mud can be rapidly increased, along with the continuous action of the microorganisms, the trimethyl chlorosilane modified silica aerogel is gradually changed from hydrophobicity into hydrophilicity in the degradation process of organic groups of the microorganisms, so that the oxygen supply effect of the calcium peroxide after being placed into the polluted bottom mud for a long time is not hindered by the hydrophobic property of hydrophobic stearic acid, the increased oxygen requirement of microorganisms in the polluted bottom mud can be ensured, and simultaneously, the monopotassium phosphate is further added into the polluted bottom mud along with the increase of the contact area of water, the PH change caused by the increase of the supply can be avoided, and the stability of the microbial degradation condition is ensured.
Embodiment two:
the embodiment of the invention provides a method for removing pollutant sediment degradation organic matters based on a calcium peroxide technology, which embeds a slow-release oxygen agentCalcium peroxide, fe 2+ Oxalic acid is added into the polluted bottom mud, the action of calcium peroxide and water is slowed down by a slow-release oxygen agent, and the release rate of oxygen is retarded to ensure that the continuous degradation action of microorganisms fully degrades the organic matters of the polluted bottom mud;
the slow release oxygen agent comprises the following components in parts by weight: 3 parts of sodium alginate, 12 parts of trimethylchlorosilane modified silica aerogel, 15 parts of polyhydroxyalkanoate, 2 parts of dichloromethane, 1.5 parts of monopotassium phosphate and 12 parts of hydrophobic stearic acid;
the preparation process of the slow release oxygen agent over-embedded calcium oxide comprises the following steps: firstly, adding sodium alginate, trimethylchlorosilane modified silica aerogel, polyhydroxyalkanoate and hydrophobic stearic acid into a stirring device, slowly adding dichloromethane and potassium dihydrogen phosphate after stirring, and fully stirring for standby to prepare a slow-release oxygen agent mixture; step two, pressing calcium peroxide powder into pellets with the diameter of 1-1.5 mm, step three, embedding the calcium peroxide pellets into a slow-release oxygen agent mixture, extruding and granulating, wherein the diameter of the calcium peroxide pellets is 3-4 mm, the calcium peroxide pellets can be used for degrading dye organic matters in polluted bottom mud, under the effects of providing high-quality carbon sources for microorganisms by polyhydroxyalkanoates and supplying calcium peroxide, the existing or added microorganisms in the polluted bottom mud can be rapidly increased, along with the continuous action of the microorganisms, the trimethyl chlorosilane modified silica aerogel is gradually changed from hydrophobicity into hydrophilicity in the degradation process of organic groups of the microorganisms, so that the oxygen supply effect of the calcium peroxide after being placed into the polluted bottom mud for a long time is not hindered by the hydrophobic property of hydrophobic stearic acid, the increased oxygen requirement of microorganisms in the polluted bottom mud can be ensured, and simultaneously, the monopotassium phosphate is further added into the polluted bottom mud along with the increase of the contact area of water, the PH change caused by the increase of the supply can be avoided, and the stability of the microbial degradation condition is ensured.
Embodiment III:
the embodiment of the invention provides a method for removing pollutant sediment degradation organic matters based on a calcium peroxide technology, which comprises the steps of embedding a slow-release oxygen agent into calcium peroxide and Fe 2+ And ethylenediamine tetraacetic acid are added into the polluted bottom mud and slowed down by the slow release oxygen agentThe calcium oxide acts with water to delay the release rate of oxygen so as to lead the continuous degradation of microorganisms to fully degrade the organic matters of the polluted bottom mud;
the slow release oxygen agent comprises the following components in parts by weight: 1 part of sodium alginate, 15 parts of trimethylchlorosilane modified silica aerogel, 15 parts of polyhydroxyalkanoate, 3 parts of dichloromethane, 1 part of potassium dihydrogen phosphate and 10 parts of hydrophobic stearic acid;
the preparation process of the slow release oxygen agent over-embedded calcium oxide comprises the following steps: firstly, adding sodium alginate, trimethylchlorosilane modified silica aerogel, polyhydroxyalkanoate and hydrophobic stearic acid into a stirring device, slowly adding dichloromethane and potassium dihydrogen phosphate after stirring, and fully stirring for standby to prepare a slow-release oxygen agent mixture; step two, pressing calcium peroxide powder into pellets with the diameter of 1-1.5 mm, step three, embedding the calcium peroxide pellets into a slow-release oxygen agent mixture, extruding and granulating, wherein the diameter of the calcium peroxide pellets is 3-4 mm, the calcium peroxide pellets can be used for degrading antibiotic organic matters in polluted bottom mud, under the effects of providing high-quality carbon sources for microorganisms by polyhydroxyalkanoates and supplying calcium peroxide, the existing or added microorganisms in the polluted bottom mud can be rapidly increased, along with the continuous action of the microorganisms, the trimethyl chlorosilane modified silica aerogel is gradually changed from hydrophobicity into hydrophilicity in the degradation process of organic groups of the microorganisms, so that the oxygen supply effect of the calcium peroxide after being placed into the polluted bottom mud for a long time can not be blocked by the hydrophobic property of hydrophobic stearic acid, the increased oxygen requirement of microorganisms in the polluted bottom mud can be ensured, and simultaneously, the monopotassium phosphate is further added into the polluted bottom mud along with the increase of the contact area of water, the PH change caused by the increase of the supply can be avoided, and the stability of the microbial degradation condition is ensured.
Embodiment four:
the embodiment of the invention provides a method for removing pollutant sediment degradation organic matters based on a calcium peroxide technology, which comprises the steps of embedding a slow-release oxygen agent into calcium peroxide and Fe 2+ And citric acid are added into the polluted bottom mud, and the slow-release oxygen agent slows down the action of calcium peroxide and water, delays the release rate of oxygen, so that the continuous degradation of microorganisms can lead the polluted bottom mudFully degrading organic matters;
the slow release oxygen agent comprises the following components in parts by weight: 3 parts of sodium alginate, 20 parts of trimethylchlorosilane modified silica aerogel, 25 parts of polyhydroxyalkanoate, 3 parts of dichloromethane, 2 parts of potassium dihydrogen phosphate and 15 parts of hydrophobic stearic acid;
the preparation process of the slow release oxygen agent over-embedded calcium oxide comprises the following steps: firstly, adding sodium alginate, trimethylchlorosilane modified silica aerogel, polyhydroxyalkanoate and hydrophobic stearic acid into a stirring device, slowly adding dichloromethane and potassium dihydrogen phosphate after stirring, and fully stirring for standby to prepare a slow-release oxygen agent mixture; step two, pressing calcium peroxide powder into pellets with the diameter of 1-1.5 mm, step three, embedding the calcium peroxide pellets into a slow-release oxygen agent mixture, extruding and granulating, wherein the diameter of the calcium peroxide pellets is 3-4 mm, the calcium peroxide pellets can be used for degrading petroleum hydrocarbon organic matters in polluted bottom mud, under the effects of providing high-quality carbon sources for microorganisms by polyhydroxyalkanoates and supplying calcium peroxide, the existing or added microorganisms in the polluted bottom mud can be rapidly increased, along with the continuous action of the microorganisms, the trimethyl chlorosilane modified silica aerogel is gradually changed from hydrophobicity into hydrophilicity in the degradation process of organic groups of the microorganisms, so that the oxygen supply effect of the calcium peroxide after being placed into the polluted bottom mud for a long time can not be blocked by the hydrophobic property of hydrophobic stearic acid, the increased oxygen requirement of microorganisms in the polluted bottom mud can be ensured, and simultaneously, the monopotassium phosphate is further added into the polluted bottom mud along with the increase of the contact area of water, the PH change caused by the increase of the supply can be avoided, and the stability of the microbial degradation condition is ensured.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A method for removing pollutant sediment degradation organic matters based on a calcium peroxide technologyIs characterized in that: embedding slow-release oxygen agent into calcium peroxide and Fe 2+ And an organic chelating agent is added into the polluted bottom mud, the action of calcium peroxide and water is slowed down by a slow-release oxygen agent, and the release rate of oxygen is retarded to ensure that the continuous degradation action of microorganisms fully degrades the organic matters of the polluted bottom mud;
the slow release oxygen agent comprises the following components in parts by weight: 1 to 3 parts of sodium alginate, 10 to 20 parts of trimethylchlorosilane modified silica aerogel, 15 to 25 parts of polyhydroxyalkanoate, 2 to 3 parts of dichloromethane, 1 to 2 parts of buffering agent and 10 to 15 parts of hydrophobic stearic acid;
the preparation process of the slow-release oxygen agent embedded calcium peroxide comprises the following steps: firstly, adding sodium alginate, trimethylchlorosilane modified silica aerogel, polyhydroxyalkanoate and hydrophobic stearic acid into a stirring device, slowly adding dichloromethane and a buffer after stirring, and fully stirring for standby to prepare a slow-release oxygen agent mixture; step two, pressing the calcium peroxide powder into pellets with the diameter of 1-1.5 mm, step three, embedding the calcium peroxide pellets into a slow-release oxygen agent mixture, and then extruding and granulating.
2. The method for removing the degradation organic matters from the polluted bottom mud based on the calcium peroxide technology as claimed in claim 1, which is characterized in that: the buffer is potassium dihydrogen phosphate.
3. The method for removing the degradation organic matters from the polluted bottom mud based on the calcium peroxide technology as claimed in claim 1, which is characterized in that: the organic chelating agent is one of ethylenediamine disuccinic acid, oxalic acid, ethylenediamine tetraacetic acid and citric acid.
4. The method for removing the degradation organic matters from the polluted bottom mud based on the calcium peroxide technology as claimed in claim 1, which is characterized in that: the diameter of the calcium peroxide pellets embedded by the slow-release oxygen agent mixture after granulation is 3-4 mm.
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| CN114455704B (en) * | 2022-03-01 | 2022-12-27 | 南京大学 | Method for deep biological denitrification enhancement and endocrine disrupting toxicity reduction |
| CN116553795B (en) * | 2023-07-10 | 2023-09-01 | 石家庄首创水汇环境治理有限公司 | Bottom mud repairing agent and bottom mud repairing method |
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