CN111960520A - Environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water - Google Patents
Environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water Download PDFInfo
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- CN111960520A CN111960520A CN202010741732.1A CN202010741732A CN111960520A CN 111960520 A CN111960520 A CN 111960520A CN 202010741732 A CN202010741732 A CN 202010741732A CN 111960520 A CN111960520 A CN 111960520A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 209
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000012629 purifying agent Substances 0.000 title claims abstract description 46
- 230000000694 effects Effects 0.000 claims abstract description 28
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical class [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 claims abstract description 8
- 239000002738 chelating agent Substances 0.000 claims abstract description 8
- 239000000701 coagulant Substances 0.000 claims abstract description 8
- 239000000645 desinfectant Substances 0.000 claims abstract description 8
- 239000008394 flocculating agent Substances 0.000 claims abstract description 8
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims description 55
- 238000000034 method Methods 0.000 claims description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 33
- 239000002351 wastewater Substances 0.000 claims description 28
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 25
- 229910021536 Zeolite Inorganic materials 0.000 claims description 23
- 239000010457 zeolite Substances 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 22
- 238000002474 experimental method Methods 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 239000011777 magnesium Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 239000001095 magnesium carbonate Substances 0.000 claims description 10
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 10
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 10
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000000395 magnesium oxide Substances 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 6
- 238000003763 carbonization Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 claims description 6
- 239000010459 dolomite Substances 0.000 claims description 6
- 229910000514 dolomite Inorganic materials 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 230000036632 reaction speed Effects 0.000 claims description 6
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 6
- 235000019830 sodium polyphosphate Nutrition 0.000 claims description 6
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 6
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 4
- 229910000395 dimagnesium phosphate Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000010865 sewage Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 238000010000 carbonizing Methods 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 150000001768 cations Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- -1 Na + Chemical class 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003621 irrigation water Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/586—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing ammoniacal nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses an environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water, which relates to the field of water area treatment and comprises the following components in parts by mass: 20-30 parts by mass of modified magnesium oxide; 10-15 parts by mass of hydrogen phosphate; 20-30 parts of potassium chlorate; 15-20 parts by mass of a chelating agent; 10-15 parts of a flocculating agent; 5-10 parts of coagulant aid; 10-15 parts of disinfectant. According to the invention, the environment-friendly water purifying agent is added into the water body, so that the ammonia nitrogen content in the water body can be rapidly reduced, the time is short, the effect is fast, the time efficiency is higher than that of bioremediation, secondary pollution is avoided, the purpose of efficiently removing ammonia nitrogen is achieved, the effect of purifying water quality is achieved, the effect of restoring the ecology of landscape water body is achieved, various relatively stable environments of water environment of the water body are maintained by selecting the appropriate concentration of the environment-friendly water purifying agent, and the water body purifying effect is improved.
Description
Technical Field
The invention relates to the field of water area treatment, in particular to an environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water.
Background
With the development of modern society becoming faster and faster, the people's living standard is continuously improved, and a large amount of domestic sewage, agricultural irrigation water, domestic garbage, industrial wastewater and surface runoff with large pollution load directly flow into the water body, so that the eutrophication degree of the water body is increased, the water body becomes black and smelly, the total nitrogen load of the black and smelly river water body is increased, and the concentration of the ammonia nitrogen in the river is higher.
In practical engineering application, how to reduce the ammonia nitrogen concentration of a water body and improve the water quality of the water body is a key of a method for comprehensively treating black and odorous water bodies, the traditional biological denitrification technology is completed through ammoniation, nitrification, denitrification and assimilation, the traditional biological denitrification technology is mature, the denitrification effect is good, but the defects of long process flow, large occupied area, frequent need of additional carbon sources, high energy consumption, high cost and the like exist, the method comprises a steam stripping method and an air stripping method, the mechanism is that wastewater is adjusted to be alkaline, then air or steam is introduced into a stripping tower, free ammonia in the wastewater is stripped through gas-liquid contact, the method is simple in process, stable in effect, strong in applicability, low in investment, large in energy consumption and secondary pollution, and the common biological denitrification process can be divided into (1) a multistage sludge system: the process can achieve good BOD5 removing effect and denitrification effect, but the process is longer, (2) the single-stage sludge system: the system is in the form of: the system comprises a preposed denitrification system, a postposition denitrification system and an alternate working system, wherein the preposed denitrification biological denitrification process is generally called an A/O process, and has the advantages of simple process flow, few structures, low capital construction cost, no additional carbon source and high effluent quality; the post-denitrification system needs manual carbon source addition, and the nitrogen denitrification effect is higher than that of a pre-positioned system; the alternative working system has good denitrification effect but higher operating cost.
Disclosure of Invention
The invention aims to: in order to solve the problems that the traditional biological denitrification technology is completed through ammoniation, nitrification, denitrification and assimilation, the traditional biological denitrification technology is mature, the denitrification effect is good, but the defects of long process flow, large occupied area, frequent need of additional carbon source, high energy consumption, high cost and the like exist, the method comprises a steam stripping method and an air stripping method, the mechanism is that wastewater is adjusted to be alkaline, then air or steam is introduced into a stripping tower, free ammonia in the wastewater is stripped through gas-liquid contact, the method is simple in process, stable in effect, strong in applicability, low in investment, but high in energy consumption and secondary pollution, and the common biological denitrification process can be divided into (1) a multistage sludge system: the process can achieve good BOD5 removing effect and denitrification effect, but the process is long, (2) the single-stage sludge system: the system is in the form of: the system comprises a preposed denitrification system, a postposition denitrification system and an alternate working system, wherein the preposed denitrification biological denitrification process is generally called an A/O process, and has the advantages of simple process flow, less structures, low capital construction cost, no additional carbon source and high effluent quality; the post-denitrification system needs manual carbon source addition, and the nitrogen denitrification effect is higher than that of a pre-positioned system; the alternative working system has good denitrification effect but higher operating cost, and provides the environment-friendly water purifying agent for comprehensively and rapidly eliminating the ammonia nitrogen in the black and odorous water body.
In order to achieve the purpose, the invention provides the following technical scheme: an environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water comprises the following components in parts by mass: 20-30 parts by mass of modified magnesium oxide; 10-15 parts by mass of hydrogen phosphate; 20-30 parts of potassium chlorate; 15-20 parts by mass of a chelating agent; 10-15 parts of a flocculating agent; 5-10 parts of coagulant aid; 10-15 parts of disinfectant.
Preferably, the preparation method of the modified magnesium oxide comprises the following steps:
s1: the method comprises the following steps of preparing magnesium oxide from dolomite by a secondary carbonization method, and calcining the dolomite to generate magnesium oxide and calcium oxide;
s2: digesting with water to obtain Mg (OH)2 and Ca (OH)2, carbonizing for the first time to make Mg (OH)2 into MgCO3 and Mg (HCO3)2, and making Ca (OH)2 into CaCO 3;
s3: the obtained Mg (HCO3)2 is pyrolyzed into MgCO3 precipitate, and the precipitate is put into water for secondary carbonization, so that the MgCO3 generates Mg (HCO3) 2.
Preferably, the chelating agent is a mixture of sodium tripolyphosphate, sodium polyphosphate and sodium pyrophosphate, wherein the ratio of the sodium tripolyphosphate, the sodium polyphosphate and the sodium pyrophosphate is 1:1: 2.
Preferably, the preparation method of the water purifying agent comprises the following steps:
s1: putting modified magnesium oxide, hydrogen phosphate and potassium chlorate in a certain proportion into a stirrer for mixing and stirring, controlling the temperature to be 30-45 ℃, stirring for two hours, and heating to 50 ℃ after the two hours, wherein the stirring speed is 70 r/min;
s2: adding a certain proportion of solvent which is water into a stirrer, continuously stirring, controlling the temperature to be kept at 50 ℃, stirring for one half hour, and then adding a certain proportion of flocculating agent, coagulant aid and disinfectant into the stirrer;
s3: stirring for half an hour, heating to 90 deg.C at a speed of 10 deg.C every hour, and stopping stirring to reduce the temperature;
s4: and cooling the mixture to room temperature by using a mode of combining air cooling and water cooling, and then taking out the mixture for putting.
Preferably, the method comprises the following steps:
the method comprises the following steps: taking a certain amount of wastewater containing ammonia nitrogen, and estimating the content of ammonia nitrogen in the wastewater;
step two: adding sodium hydroxide or hydrochloric acid to adjust the pH value of the wastewater to be alkaline;
step three: adding a certain amount of environment-friendly water purifying agent, fully stirring, and reacting for a period of time; ammonia nitrogen in the water can be oxidized into nitrogen by the ammonia nitrogen remover, and the ammonia nitrogen is removed in a form of being converted into the nitrogen;
step four: and then adding zeolite powder into the water, and removing ammonia nitrogen through physical surface adsorption of an experimental substrate.
Preferably, in the first step, a certain amount of wastewater containing ammonia nitrogen is taken, the content of ammonia nitrogen in the water is estimated, a 5ml water quality sample of the southeast corner of the river can be taken, then the water quality sample is placed into the water quality ammonia nitrogen determinator to be detected, a result A1 is obtained, then a 5ml water quality sample of the northeast corner of the river is taken to be secondarily detected, a result A2 is obtained, a 10ml water quality sample of the southwest corner of the river is taken and placed into the water quality ammonia nitrogen determinator to be detected, a result B1 is obtained, a 10ml water quality sample of the northwest corner of the river is taken, the determination result is B2, finally a purified water is taken to be a blank test, the result is C, A1, A2, B1 and B2 are estimated, and the average value is the content of ammonia nitrogen in the.
Preferably, sodium hydroxide or hydrochloric acid is added in the second step to adjust the pH of the wastewater to be alkaline, wherein:
s1: when the pH value of the water is 8.0-8.4, the water temperature is 20 ℃, the reaction speed of the water purifying agent is the fastest, because the pH value of the water purifying agent is reduced in the reaction process, when the alkalinity of the wastewater is insufficient, lime needs to be added, and the pH value is maintained to be more than 7.5;
s2: when the temperature is high, the reaction speed of the water purifying agent is high, the water temperature is suitable to be 35 ℃, the activity of the modified magnesium oxide in the water purifying agent is rapidly reduced below 15 ℃, and therefore the water temperature is preferably not lower than 15 ℃.
Preferably, a certain amount of environment-friendly water purifying agent is added in the third step, and the mixture is fully stirred and reacted for a period of time; the ammonia nitrogen in the water can be oxidized into nitrogen by the ammonia nitrogen remover, the ammonia nitrogen is converted into nitrogen to be removed, the optimal reasonable concentration range for treating sewage can be selected by configuring different concentrations, and the configured concentration gradient is as follows: 0.0mg/L, 1.0mg/L, 5.0mg/L, 10mg/L, 50mg/L, 100mg/L, 0.0mg/L is experiment group No. 0, 1.0mg/L is experiment group No. 1, 5.0mg/L is experiment group No. 2, 10mg/L is experiment group No. 3, 50mg/L is experiment group No. 4, 100mg/L is experiment group No. 5, the obtained test data are as follows:
experimental group No. 0: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 6.01mg/L, and the contrast removal rate is 5.80 percent;
experimental group No. 1: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 4.62mg/L, and the comparative removal rate is 27.59%;
experimental group No. 2: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 2.78mg/L, and the contrast removal rate is 56.43 percent;
experimental group No. 3: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 0.61mg/L, and the comparative removal rate is 90.44%;
experimental group No. 4: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 1.38mg/L, and the contrast removal rate is 78.31 percent;
experimental group No. 5: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 2.38mg/L, and the contrast removal rate is 62.70%.
Preferably, in the fourth step, zeolite powder is added into the water again, ammonia nitrogen is removed through physical surface adsorption of an experimental substrate, the zeolite powder is 200-mesh zeolite powder optimized for treatment, 3.0kg and 15 parts of zeolite powder are weighed, the zeolite powder is added into the water after being added into wastewater of experimental groups 0-5 for reaction for a period of time, and data obtained after the experiment is data obtained after the zeolite powder is added.
Compared with the prior art, the invention has the beneficial effects that:
1. the environment-friendly water purifying agent is added into the water body, so that the ammonia nitrogen content in the water body can be quickly reduced, the time is short, the effect is quick, the time efficiency is higher than that of bioremediation, secondary pollution is avoided, the aim of efficiently removing ammonia nitrogen is fulfilled, the water quality is purified, the ecological effect of restoring landscape water bodies is fulfilled, various relatively stable environments of water environment of the water body are kept by selecting proper concentration of the environment-friendly water purifying agent, and the water body purification effect is improved.
2. The zeolite powder is added into the water body, so that the method is non-toxic and harmless, has the characteristics of large porosity, strong absorbability and stable chemical properties, effectively adsorbs the residual ammonia nitrogen in the water body, and further recovers the water body balance state.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction 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 embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships shown, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be specifically understood by those of ordinary skill in the art. The following describes an embodiment of the present invention based on its overall structure.
Example 1
An environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water comprises the following components in parts by mass: 20-30 parts by mass of modified magnesium oxide; 10-15 parts by mass of hydrogen phosphate; 20-30 parts of potassium chlorate; 15-20 parts of a chelating agent; 10-15 parts of a flocculating agent; 5-10 parts of coagulant aid; 10-15 parts of disinfectant.
The preparation method of the water purifying agent comprises the following steps:
s1: putting modified magnesium oxide, hydrogen phosphate and potassium chlorate in a certain proportion into a stirrer for mixing and stirring, controlling the temperature to be 30-45 ℃, stirring for two hours, and heating to 50 ℃ after the two hours, wherein the stirring speed is 70 r/min;
s2: adding a certain proportion of solvent which is water into a stirrer, continuously stirring, controlling the temperature to be kept at 50 ℃, stirring for one half hour, and then adding a certain proportion of flocculating agent, coagulant aid and disinfectant into the stirrer;
s3: stirring for half an hour, heating to 90 deg.C at a speed of 10 deg.C every hour, and stopping stirring to reduce the temperature;
s4: and cooling the mixture to room temperature by using a mode of combining air cooling and water cooling, and then taking out the mixture for putting.
According to the invention, the environment-friendly water purifying agent is added into the water body, so that the ammonia nitrogen content in the water body can be rapidly reduced, the time is short, the effect is fast, the time efficiency is higher than that of bioremediation, secondary pollution is avoided, the purpose of efficiently removing ammonia nitrogen is achieved, the effect of purifying water quality is achieved, the effect of restoring the ecology of landscape water body is achieved, various relatively stable environments of water environment of the water body are maintained by selecting the appropriate concentration of the environment-friendly water purifying agent, and the water body purifying effect is improved.
Example 2
The preparation method of the modified magnesium oxide comprises the following steps:
s1: the method comprises the following steps of preparing magnesium oxide from dolomite by a secondary carbonization method, and calcining the dolomite to generate magnesium oxide and calcium oxide;
s2: digesting with water to obtain Mg (OH)2 and Ca (OH)2, carbonizing for the first time to make Mg (OH)2 into MgCO3 and Mg (HCO3)2, and making Ca (OH)2 into CaCO 3;
s3: the obtained Mg (HCO3)2 is pyrolyzed into MgCO3 precipitate, and the precipitate is put into water for secondary carbonization, so that the MgCO3 generates Mg (HCO3) 2.
In the invention, compared with ordinary magnesium oxide, the modified magnesium oxide can achieve a better wastewater treatment effect, so that the wastewater treatment effect is better, the preparation process is simpler, and the modified magnesium oxide can be quickly put into use.
Example 3
The chelating agent is a mixture of sodium tripolyphosphate, sodium polyphosphate and sodium pyrophosphate, wherein the ratio of the sodium tripolyphosphate, the sodium polyphosphate and the sodium pyrophosphate is 1:1: 2.
In the present invention, a metal atom or ion is allowed to act on a ligand having two or more coordinating atoms to form a complex having a cyclic structure, which is called a chelate, and such a ligand substance capable of forming a chelate is called a chelating agent, also called a complexing agent.
Example 4
The preparation method of the water purifying agent comprises the following steps:
s1: putting modified magnesium oxide, hydrogen phosphate and potassium chlorate in a certain proportion into a stirrer for mixing and stirring, controlling the temperature to be 30-45 ℃, stirring for two hours, and heating to 50 ℃ after the two hours, wherein the stirring speed is 70 r/min;
s2: adding a certain proportion of solvent which is water into a stirrer, continuously stirring, controlling the temperature to be kept at 50 ℃, stirring for one half hour, and then adding a certain proportion of flocculating agent, coagulant aid and disinfectant into the stirrer;
s3: stirring for half an hour, heating to 90 deg.C at a speed of 10 deg.C every hour, and stopping stirring to reduce the temperature;
s4: and cooling the mixture to room temperature by using a mode of combining air cooling and water cooling, and then taking out the mixture for putting.
In the invention, no waste water is produced in the process of preparing the water purifying agent, but waste gas is produced, and the waste gas can be discharged after being treated by a professional waste gas treatment device.
Example 5
The method comprises the following steps:
the method comprises the following steps: taking a certain amount of wastewater containing ammonia nitrogen, and estimating the content of ammonia nitrogen in the wastewater;
step two: adding sodium hydroxide or hydrochloric acid to adjust the pH value of the wastewater to be alkaline;
step three: adding a certain amount of environment-friendly water purifying agent, fully stirring, and reacting for a period of time; ammonia nitrogen in the water can be oxidized into nitrogen by the ammonia nitrogen remover, and the ammonia nitrogen is removed in a form of being converted into the nitrogen;
step four: and then adding zeolite powder into the water, and removing ammonia nitrogen through physical surface adsorption of an experimental substrate.
According to the invention, a large part of macromolecular inorganic compound (the water purifying agent) which is dissolved in water and passes through a frame structure reacts with ammonia nitrogen in wastewater to generate nitrogen (N2), the ammonia nitrogen is converted into nitrogen to be removed, and the other part of ammonia nitrogen is adsorbed on the physical surface of an experimental matrix to remove the ammonia nitrogen, so that the removal rate of the ammonia nitrogen is high, and no secondary pollution is caused.
Example 6
Taking a certain amount of ammonia nitrogen-containing wastewater, estimating the content of ammonia nitrogen in water, taking a water quality sample of 5ml of the northeast corner of the river, placing the water quality sample into a water quality ammonia nitrogen tester for testing to obtain a result A1, then taking a water quality sample of 5ml of the northeast corner of the river for secondary testing to obtain a result A2, taking a water quality sample of 10ml of the southwest corner of the river, placing the water quality sample into the water quality ammonia nitrogen tester for testing to obtain a result B1, then taking a water quality sample of 10ml of the northwest corner of the river, testing the result B2, finally taking purified water for blank testing to obtain a result C, estimating A1, A2, B1 and B2, and taking an average value to obtain the content of ammonia nitrogen in water.
In the invention, water sources of different places of the same river are obtained for testing, so that the test has multiple types, and the final result has credibility.
Example 7
Adding sodium hydroxide or hydrochloric acid to adjust the pH of the wastewater to be alkaline, wherein:
s1: when the pH value of the water is 8.0-8.4, the water temperature is 20 ℃, the reaction speed of the water purifying agent is the fastest, because the pH value of the water purifying agent is reduced in the reaction process, when the alkalinity of the wastewater is insufficient, lime needs to be added, and the pH value is maintained to be more than 7.5;
s2: when the temperature is high, the reaction speed of the water purifying agent is high, the water temperature is suitable to be 35 ℃, the activity of the modified magnesium oxide in the water purifying agent is rapidly reduced below 15 ℃, and therefore the water temperature is preferably not lower than 15 ℃.
In the invention, the wastewater can be optimally treated only by adjusting the water temperature and the PH value to be optimal, the removal rate of ammonia nitrogen can be improved, and no secondary pollution is caused.
Example 8
Adding a certain amount of environment-friendly water purifying agent into the third step, fully stirring, and reacting for a period of time; the ammonia nitrogen in the water can be oxidized into nitrogen by the ammonia nitrogen remover, the ammonia nitrogen is converted into nitrogen to be removed, the optimal reasonable concentration range for treating sewage can be selected by configuring different concentrations, and the configured concentration gradient is as follows: 0.0mg/L, 1.0mg/L, 5.0mg/L, 10mg/L, 50mg/L, 100mg/L, 0.0mg/L is experiment group No. 0, 1.0mg/L is experiment group No. 1, 5.0mg/L is experiment group No. 2, 10mg/L is experiment group No. 3, 50mg/L is experiment group No. 4, 100mg/L is experiment group No. 5, the obtained test data are as follows:
experimental group No. 0: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 6.01mg/L, and the contrast removal rate is 5.80 percent;
experimental group No. 1: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 4.62mg/L, and the comparative removal rate is 27.59%;
experimental group No. 2: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 2.78mg/L, and the contrast removal rate is 56.43 percent;
experimental group No. 3: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 0.61mg/L, and the comparative removal rate is 90.44%;
experimental group No. 4: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 1.38mg/L, and the contrast removal rate is 78.31 percent;
experimental group No. 5: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 2.38mg/L, and the contrast removal rate is 62.70%.
In the present invention, the specific data are shown in Table 1
TABLE 1 variation of ammonia nitrogen content in water
| Test group | Before test (mg/L) | After the test (mg/L) | Removal Rate (%) |
| 0 | 6.38 | 6.01 | 5.80 |
| 1 | 6.38 | 4.62 | 27.59 |
| 2 | 6.38 | 2.78 | 56.43 |
| 3 | 6.38 | 0.61 | 90.44 |
| 4 | 6.38 | 1.38 | 78.37 |
| 5 | 6.38 | 2.38 | 62.70 |
Example 9
And in the fourth step, zeolite powder is added into the water again, ammonia nitrogen is removed through physical surface adsorption of an experimental substrate, the zeolite powder is 200-mesh zeolite powder optimized for treatment, 3.0kg and 15 parts of zeolite powder are weighed, the zeolite powder is added into the water after being added into the wastewater of the experimental group No. 0-5 for reaction for a period of time, and data obtained after the experiment is data obtained after the zeolite powder is added.
The zeolite is an aluminosilicate, the chemical composition of which can be expressed as (M2+ 2M +) O.Al203.mSiO2.nH2O (M is 2-10, n is 0-9), wherein M2+ represents divalent cations such as Ca2+, Sr2+ and the like, M + represents divalent cations such as Na +, K + and the like, and the aluminosilicate is a weak acid type cation exchanger.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. The environment-friendly water purifying agent for comprehensively and quickly eliminating ammonia nitrogen in black and odorous water is characterized by comprising the following components in parts by mass: 20-30 parts by mass of modified magnesium oxide; 10-15 parts by mass of hydrogen phosphate; 20-30 parts of potassium chlorate; 15-20 parts by mass of a chelating agent; 10-15 parts of a flocculating agent; 5-10 parts of coagulant aid; 10-15 parts of disinfectant.
2. The environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water according to claim 1, which is characterized in that: the preparation method of the modified magnesium oxide comprises the following steps:
s1: the method comprises the following steps of preparing magnesium oxide from dolomite by a secondary carbonization method, and calcining the dolomite to generate magnesium oxide and calcium oxide;
s2: digesting with water to obtain Mg (OH)2 and Ca (OH)2, carbonizing for the first time to make Mg (OH)2 into MgCO3 and Mg (HCO3)2, and making Ca (OH)2 into CaCO 3;
s3: pyrolyzing the obtained Mg (HCO3)2 into MgCO3 precipitate, and putting the precipitate into water for secondary carbonization to enable MgCO3 to generate Mg (HCO3) 2;
s4: pyrolyzing, filtering, washing and calcining the MgCO3 to generate modified magnesium oxide.
3. The environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water according to claim 1, which is characterized in that: the chelating agent is a mixture of sodium tripolyphosphate, sodium polyphosphate and sodium pyrophosphate, wherein the ratio of the sodium tripolyphosphate, the sodium polyphosphate and the sodium pyrophosphate is 1:1: 2.
4. The environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water according to claim 1, which is characterized in that the preparation method of the water purifying agent comprises the following steps:
s1: putting modified magnesium oxide, hydrogen phosphate and potassium chlorate in a certain proportion into a stirrer for mixing and stirring, controlling the temperature to be 30-45 ℃, stirring for two hours, and heating to 50 ℃ after the two hours, wherein the stirring speed is 70 r/min;
s2: adding a certain proportion of solvent which is water into a stirrer, continuously stirring, controlling the temperature to be kept at 50 ℃, stirring for one half hour, and then adding a certain proportion of flocculating agent, coagulant aid and disinfectant into the stirrer;
s3: stirring for half an hour, heating to 90 deg.C at a speed of 10 deg.C every hour, and stopping stirring to reduce the temperature;
s4: and cooling the mixture to room temperature by using a mode of combining air cooling and water cooling, and then taking out the mixture for putting.
5. The environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water according to claim 1, which is characterized by comprising the following steps:
the method comprises the following steps: taking a certain amount of wastewater containing ammonia nitrogen, and estimating the content of ammonia nitrogen in the wastewater;
step two: adding sodium hydroxide or hydrochloric acid to adjust the pH value of the wastewater to be alkaline;
step three: adding a certain amount of environment-friendly water purifying agent, fully stirring, and reacting for a period of time; ammonia nitrogen in the water can be oxidized into nitrogen by the ammonia nitrogen remover, and the ammonia nitrogen is removed in a form of being converted into the nitrogen;
step four: and then adding zeolite powder into the water, and removing ammonia nitrogen through physical surface adsorption of an experimental substrate.
6. The environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water according to claim 5, which is characterized in that: taking a certain amount of wastewater containing ammonia nitrogen, estimating the content of ammonia nitrogen in water, taking a water quality sample of 5ml of a river southeast corner, placing the water quality sample into a water quality ammonia nitrogen tester for testing to obtain a result A1, then taking a water quality sample of 5ml of the river northeast corner for secondary testing to obtain a result A2, taking a water quality sample of 10ml of the river southwest corner, placing the water quality sample into the water quality ammonia nitrogen tester for testing to obtain a result B1, taking a water quality sample of 10ml of the river northwest corner, testing the result B2, finally taking purified water for blank test to obtain a result C, estimating the content of ammonia nitrogen in water A1, A2, B1 and B2, and taking the average value to obtain the content of ammonia nitrogen in water.
7. The environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water body according to claim 5, wherein sodium hydroxide or hydrochloric acid is added in the second step to adjust the pH of the waste water to be alkaline, and the method comprises the following steps:
s1: when the pH value of the water is 8.0-8.4, the water temperature is 20 ℃, the reaction speed of the water purifying agent is the fastest, because the pH value of the water purifying agent is reduced in the reaction process, when the alkalinity of the wastewater is insufficient, lime needs to be added, and the pH value is maintained to be more than 7.5;
s2: when the temperature is high, the reaction speed of the water purifying agent is high, the water temperature is suitable to be 35 ℃, the activity of the modified magnesium oxide in the water purifying agent is rapidly reduced below 15 ℃, and therefore the water temperature is preferably not lower than 15 ℃.
8. The environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water according to claim 5, which is characterized in that: adding a certain amount of environment-friendly water purifying agent into the third step, fully stirring, and reacting for a period of time; the ammonia nitrogen in the water can be oxidized into nitrogen by the ammonia nitrogen remover, the ammonia nitrogen is converted into nitrogen to be removed, the optimal reasonable concentration range for treating sewage can be selected by configuring different concentrations, and the configured concentration gradient is as follows: 0.0mg/L, 1.0mg/L, 5.0mg/L, 10mg/L, 50mg/L, 100mg/L, 0.0mg/L is experiment group No. 0, 1.0mg/L is experiment group No. 1, 5.0mg/L is experiment group No. 2, 10mg/L is experiment group No. 3, 50mg/L is experiment group No. 4, 100mg/L is experiment group No. 5, the obtained test data are as follows:
experimental group No. 0: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 6.01mg/L, and the contrast removal rate is 5.80 percent;
experimental group No. 1: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 4.62mg/L, and the comparative removal rate is 27.59%;
experimental group No. 2: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 2.78mg/L, and the contrast removal rate is 56.43 percent;
experimental group No. 3: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 0.61mg/L, and the comparative removal rate is 90.44%;
experimental group No. 4: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 1.38mg/L, and the contrast removal rate is 78.31 percent;
experimental group No. 5: the ammonia nitrogen content in the water before the test is 6.38mg/L, the ammonia nitrogen content in the water after the test is 2.38mg/L, and the contrast removal rate is 62.70%.
9. The environment-friendly water purifying agent for comprehensively and rapidly eliminating ammonia nitrogen in black and odorous water according to claim 8, which is characterized in that: and in the fourth step, zeolite powder is added into the water again, ammonia nitrogen is removed through physical surface adsorption of an experimental substrate, the zeolite powder is 200-mesh zeolite powder optimized for treatment, 3.0kg and 15 parts of zeolite powder are weighed, and the zeolite powder is added into the water after being added into the wastewater of the experimental group No. 0-5 for reaction for a period of time, wherein the data obtained after the experiment is data obtained after the zeolite powder is added.
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