CN109455802A - The processing method of waste water - Google Patents
The processing method of waste water Download PDFInfo
- Publication number
- CN109455802A CN109455802A CN201811518327.2A CN201811518327A CN109455802A CN 109455802 A CN109455802 A CN 109455802A CN 201811518327 A CN201811518327 A CN 201811518327A CN 109455802 A CN109455802 A CN 109455802A
- Authority
- CN
- China
- Prior art keywords
- waste water
- processing method
- precipitation reaction
- oxidant
- precipitating reagent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
Abstract
The present invention provides a kind of processing methods of waste water.The processing method includes: so that waste water and precipitating reagent and oxidant is carried out precipitation reaction under conditions of being heated and pressurizeed, and is purified water and sediment, and the COD of waste water is 500~20000mg/L.Under the conditionity of pressurization and oxidant, the system current potential of oxidant is higher than the system current potential of oxidant under normal pressure, thus in the processing method of above-mentioned waste water, most of organic matter in waste water can be oxidized degradation, to be conducive to be greatly reduced the COD value in waste water.Contain a certain amount of foreign ion in waste water simultaneously, the precipitating reagent in waste water is added and precipitation reaction occurs for above-mentioned foreign ion, so as to reduce the content of foreign ion in waste water.In conclusion the content of the foreign ion in the COD and waste water of waste water can be substantially reduced using the processing method of waste water provided by the present application.
Description
Technical field
The present invention relates to sewage treatment fields, in particular to a kind of processing method of waste water.
Background technique
Organic matter, nitrogen, phosphorus are the principal elements for causing water eutrophication, raising and the country with Public Environmental Awareness
The limitation standard of discharge index is increasingly stringenter outside, exploiting economy, efficient sewage disposal technology are always water pollution control
The hot spot of engineering field.
For the waste water of high chemical oxygen demand (COD) and high BOD (BOD), existing method mostly uses the precipitation method
It is handled.But since the ingredient of such waste water is complex, thus after precipitating reagent is handled, the indices for the treatment of fluid without
Method meets existing environmental protection standard, and process flow is complex.
On this basis, need to research and develop a kind of processing method of waste water for being capable of handling high COD and high BOD.
Summary of the invention
The main purpose of the present invention is to provide a kind of processing methods of waste water, can not be to high COD to solve the prior art
The problem of sewage is effectively treated.
To achieve the goals above, the present invention provides a kind of wastewater treatment method, the processing method include: heating and
Under conditions of pressurization, so that waste water and precipitating reagent and oxidant is carried out precipitation reaction, be purified water and sediment, the COD of waste water
For 500~20000mg/L.
Further, the temperature of precipitation reaction is 110~250 DEG C；Preferably, the temperature of precipitation reaction is 150~200
℃。
Further, the pressure of precipitation reaction is 0.48~4.6MPa, and partial pressure of oxygen is 0.1~1.0MPa；Preferably, it precipitates
The pressure of reaction process is 0.8~2.2MPa, and wherein partial pressure of oxygen is 0.2~0.6MPa.
Further, the reaction time of precipitation reaction is 0.5~3h.
Further, precipitating reagent be selected from calcium hydroxide, potassium hydroxide, sodium hydroxide, magnesium hydroxide, calcium oxide, magnesia,
One of lithia and lithium hydroxide are a variety of；Preferably, oxidant is selected from the group of hydrogen peroxide, oxygen and sodium peroxydisulfate composition
One of or it is a variety of.
Further, processing method further include: during precipitation reaction, be added also into the product system of precipitation reaction
Former agent and/or flocculant；Preferably, reducing agent is selected from one of group of ferrous sulfate, iron-carbon alloy and iron powder composition or more
Kind；Preferably, flocculant is selected from one of group of active carbon, bodied ferric sulfate and polyaluminium sulfate composition or a variety of.
Further, in terms of waste water per ton, the additional amount of precipitating reagent is 0.1~10kg.
Further, in terms of waste water per ton, the additional amount of precipitating reagent is 2~8kg/t.
Further, after precipitation reaction completion, processing method further includes being added into the product system of precipitation reaction
The pH value of product system is adjusted to 7~10, is purified water by pH adjusting agent；Preferably, pH adjusting agent is selected from sulfuric acid or salt
Acid.
Further, waste water is selected from one of industrial wastewater, garbage leachate and sanitary sewage or a variety of.
It applies the technical scheme of the present invention, under the conditionity of pressurization and oxidant, the system current potential of oxidant is higher than normal
The system current potential of oxidant is depressed, thus in the processing method of above-mentioned waste water, most of organic matter in waste water can be oxidized drop
Solution, to be conducive to be greatly reduced the COD value in waste water.Contain a certain amount of foreign ion in waste water simultaneously, is added in waste water
Precipitating reagent and above-mentioned foreign ion occur precipitation reaction, so as to reduce the content of foreign ion in waste water.In conclusion adopting
The content of the foreign ion in the COD and waste water of waste water can be substantially reduced with the processing method of waste water provided by the present application.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
As described in background technique, the method for existing sewage treatment can not carry out the sewage of upper high COD effective
The problem of processing.In order to solve the above-mentioned technical problem, this application provides a kind of wastewater treatment method, which includes:
Under conditions of being heated and pressurizeed, so that waste water and precipitating reagent and oxidant is carried out precipitation reaction, be purified water and sediment, give up
The COD of water is 500~20000mg/L.
It can be seen from background technology that the processing method of existing waste water can not be handled the higher waste water of COD value.Adding
Under pressure and the conditionity of oxidant, the system current potential of oxidant is higher than the system current potential of oxidant under normal pressure, thus above-mentioned waste water
Processing method in, most of organic matter in waste water can be oxidized degradation, to be conducive to be greatly reduced the COD in waste water
Value.Contain a certain amount of foreign ion in waste water simultaneously, the precipitating reagent in waste water is added and above-mentioned foreign ion generation precipitating is anti-
It answers, so as to reduce the content of foreign ion in waste water.In conclusion can using the processing method of waste water provided by the present application
Substantially reduce the content of the foreign ion in the COD and waste water of waste water.
Preferably, waste water includes but is not limited to one of industrial wastewater, garbage leachate and sanitary sewage or a variety of.
The impurity in the COD and waste water of waste water can be substantially reduced using the processing method of waste water provided by the present application
The content of ion.In a preferred embodiment, the temperature of precipitation reaction is 110~250 DEG C.The temperature packet of precipitation reaction
Above range is included but be not limited to, and is limited the efficiency for being conducive to further increase precipitating within the above range, and then is advantageous
In the degree of purification for improving waste water.It is highly preferred that the temperature of precipitation reaction is 150~200 DEG C.
In a preferred embodiment, the pressure of precipitation reaction be 0.48~4.6MPa, partial pressure of oxygen be 0.1~
1.0MPa.Under the action of pressurization and oxygen, system current potential is higher than the oxygen under condition of normal pressure, this makes exhausted big portion in waste water
Divide the meeting oxidative degradation such as organic matter, to play the role of reducing COD.The pressure of precipitation reaction includes but is not limited to above-mentioned model
It encloses, and is limited the eduction rate for being conducive to further increase precipitating within the above range, and then further increase purified water
Degree of purification.
In order to further decrease the COD value in waste water system, it is highly preferred that the pressure of precipitation reaction process be 0.8~
2.2MPa, wherein partial pressure of oxygen is 0.2~0.6MPa.
In a preferred embodiment, the reaction time of precipitation reaction is 0.5~3h.The reaction time of precipitation reaction
Including but not limited to above range, and limited and be conducive to make foreign ion in waste water fully to occur to sink within the above range
Form sediment reaction, and then the degree of purification of raising purified water.
In the processing method of above-mentioned waste water, precipitating reagent and oxidant can select precipitating reagent and oxidation commonly used in the art
Agent.
In a preferred embodiment, precipitating reagent include but is not limited to calcium hydroxide, potassium hydroxide, sodium hydroxide,
One of magnesium hydroxide, calcium oxide, magnesia, lithia and lithium hydroxide are a variety of.The type of precipitating reagent includes but unlimited
In above-mentioned several, and above-mentioned several precipitating reagents have stronger alkalinity in water, thus are conducive to using above-mentioned several precipitating reagents
Improve the efficiency of precipitating and the degree of precipitating.
In a preferred embodiment, oxidant includes but is not limited to what hydrogen peroxide, oxygen and sodium peroxydisulfate formed
One of group is a variety of.The type of oxidant includes but is not limited to above-mentioned several, and above-mentioned several oxidants are with stronger
Oxidation susceptibility, thus be conducive to the ratio that the organic matter of decomposition is oxidized in waste water using above-mentioned several oxidants, thus into one
Step reduces the COD value of waste water.
In a preferred embodiment, above-mentioned processing method further include: during precipitation reaction, to precipitation reaction
Product system in reducing agent and/or flocculant is added.The reducing agent of addition can be by remaining oxidant reduction, and flocculant
Be conducive to further decrease the content of the suspended matter in precipitation reaction system, while it is heavy further to make foreign ion that flocculation occur
It forms sediment, to be conducive to improve the degree of purification of purified water.
Preferably, reducing agent includes but is not limited to one of group of ferrous sulfate, iron-carbon alloy and iron powder composition or more
Kind.Preferably, flocculant includes but is not limited to one of group of active carbon, bodied ferric sulfate and polyaluminium sulfate composition or more
Kind.
In a preferred embodiment, in terms of waste water per ton, the additional amount of precipitating reagent is 0.1~10kg.Precipitating reagent
Additional amount include but is not limited to above range, and limited be conducive within the above range improve deposition efficiency.More preferably
Ground, in terms of waste water per ton, the additional amount of precipitating reagent is 2~8kg/t.
In a preferred embodiment, after precipitation reaction completion, above-mentioned processing method further includes anti-to precipitating
PH adjusting agent is added in the product system answered, the pH value of above-mentioned product system is adjusted to 7~10, is purified water；Preferably,
PH adjusting agent includes but is not limited to sulfuric acid or hydrochloric acid.
The application is described in further detail below in conjunction with specific embodiment, these embodiments should not be understood as limitation originally
Apply for range claimed.
Embodiment 1
This patent is shown in Table 1 using waste component.
Table 1
| Element | Heavy metal (Pb meter), ppm | COD, mg/L |
| Numerical value | 5 | 1200 |
The processing method of waste water is as follows:
1) it takes 800mL that there is the waste water of above-mentioned composition, 1g calcium hydroxide, 1g active carbon, 1g seven is added in Xiang Shangshu waste water
Aqueous ferrous sulfate obtains primary purifying water, and wherein the temperature of pressurized treatments is 180 DEG C, and pressure is 1.4~1.5MPa, partial pressure of oxygen
For 0.5MPa, reaction time 2h.
2) pH of above-mentioned primary purifying water is adjusted to 9.5 using sulfuric acid, is purified water.After processing, above-mentioned nuisance
Matter removal effect is shown in Table 2.
Embodiment 2
With the difference of embodiment 1 are as follows: the temperature of precipitation reaction is 120 DEG C.Removal effect is shown in Table 2.
Embodiment 3
With the difference of embodiment 1 are as follows: the reaction time of precipitation reaction is 15min.Removal effect is shown in Table 2.
Embodiment 4
With the difference of embodiment 1 are as follows: oxidant is hydrogen peroxide.Removal effect is shown in Table 2.
Comparative example 1
With the difference of embodiment 1 are as follows: without being heated and pressurizeed processing in precipitation process.Removal effect is shown in Table 2.
Table 2
| Heavy metal (Pb meter), ppm | COD, mg/L | |
| Embodiment 1 | 0.03 | 50 |
| Embodiment 2 | 0.04 | 230 |
| Embodiment 3 | 0.1 | 300 |
| Embodiment 4 | 0.03 | 45 |
| Comparative example 1 | 1.5 | 1000 |
It can be seen from the above description that the above embodiments of the present invention realized the following chievements:
Comparing embodiment 1 to 4 and comparative example 1 using the processing method of waste water provided by the present application it is found that be conducive to substantially
Reduce the impurity ion content and COD value in waste water.
Comparing embodiment 1 and 2 is it is found that the limit temperature of precipitation reaction is conducive to substantially in the preferred range of the application
Reduce the impurity ion content and COD value in waste water.
Comparing embodiment 1 and 3 is conducive to it is found that the reaction time of precipitation reaction is limited in the preferred range of the application
Impurity ion content and COD value in waste water is greatly reduced.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of wastewater treatment method, which is characterized in that the treating method comprises: under conditions of being heated and pressurizeed, making institute
It stating waste water and precipitating reagent and oxidant carries out precipitation reaction, be purified water and sediment, the COD of the waste water is 500~
20000mg/L。
2. processing method according to claim 1, which is characterized in that the temperature of the precipitation reaction is 110~250 DEG C；
Preferably, the temperature of the precipitation reaction is 150~200 DEG C.
3. processing method according to claim 1 or 2, which is characterized in that the pressure of the precipitation reaction be 0.48~
4.6MPa, partial pressure of oxygen are 0.1~1.0MPa；
Preferably, the pressure of the precipitation reaction process is 0.8~2.2MPa, and wherein partial pressure of oxygen is 0.2~0.6MPa.
4. processing method according to any one of claim 1 to 3, which is characterized in that when the reaction of the precipitation reaction
Between be 0.5~3h.
5. processing method according to any one of claim 1 to 3, which is characterized in that the precipitating reagent is selected from hydroxide
One of calcium, potassium hydroxide, sodium hydroxide, magnesium hydroxide, calcium oxide, magnesia, lithia and lithium hydroxide are a variety of；
Preferably, the oxidant is selected from one of group of hydrogen peroxide, oxygen and sodium peroxydisulfate composition or a variety of.
6. processing method according to any one of claim 1 to 3, which is characterized in that the processing method further include:
During precipitation reaction, reducing agent and/or flocculant are added in the product system of Xiang Suoshu precipitation reaction；
Preferably, the reducing agent is selected from one of group of ferrous sulfate, iron-carbon alloy and iron powder composition or a variety of；
Preferably, the flocculant is selected from one of group of active carbon, bodied ferric sulfate and polyaluminium sulfate composition or a variety of.
7. processing method according to claim 1 or 2, which is characterized in that in terms of waste water per ton, the addition of the precipitating reagent
Amount is 0.1~10kg.
8. processing method according to claim 7, which is characterized in that in terms of waste water per ton, the additional amount of the precipitating reagent
For 2~8kg/t.
9. processing method according to claim 1 or 2, which is characterized in that after precipitation reaction completion, the place
Reason method further includes that pH adjusting agent is added into the product system of the precipitation reaction, and the pH value of the product system is adjusted to
7~10, obtain the purified water；Preferably, the pH adjusting agent is selected from sulfuric acid or hydrochloric acid.
10. processing method according to claim 1 or 2, which is characterized in that the waste water is selected from industrial wastewater, rubbish seeps
Drip one of liquid and sanitary sewage or a variety of.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811518327.2A CN109455802A (en) | 2018-12-12 | 2018-12-12 | The processing method of waste water |
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|---|---|---|---|
| CN201811518327.2A CN109455802A (en) | 2018-12-12 | 2018-12-12 | The processing method of waste water |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54108462A (en) * | 1978-02-14 | 1979-08-25 | Toray Ind Inc | Method of treating waste water |
| US5370801A (en) * | 1987-02-13 | 1994-12-06 | Conor Pacific Environmental Technologies, Inc. | Method for treating polluted material |
| CN101168465A (en) * | 2006-10-25 | 2008-04-30 | 中国科学院大连化学物理研究所 | Catalysis wet-type oxidation degradation method for dyestuff contaminant |
| CN104609622A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Treatment method of spent lye from ethylene production |
| CN104876363A (en) * | 2015-05-27 | 2015-09-02 | 华南理工大学 | Catalytic wet oxidation method for up-to-standard discharge of refuse leachate |
| CN105164063A (en) * | 2013-04-18 | 2015-12-16 | 西门子能源公司 | Wet air oxidation process using recycled copper, vanadium or iron catalyst |
| CN105174547A (en) * | 2015-09-25 | 2015-12-23 | 浙江奇彩环境科技有限公司 | Treatment method of organic waste water |
| CN105585102A (en) * | 2016-01-07 | 2016-05-18 | 沈阳化工研究院有限公司 | Treating process of penicillin production wastewater |
-
2018
- 2018-12-12 CN CN201811518327.2A patent/CN109455802A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54108462A (en) * | 1978-02-14 | 1979-08-25 | Toray Ind Inc | Method of treating waste water |
| US5370801A (en) * | 1987-02-13 | 1994-12-06 | Conor Pacific Environmental Technologies, Inc. | Method for treating polluted material |
| CN101168465A (en) * | 2006-10-25 | 2008-04-30 | 中国科学院大连化学物理研究所 | Catalysis wet-type oxidation degradation method for dyestuff contaminant |
| CN105164063A (en) * | 2013-04-18 | 2015-12-16 | 西门子能源公司 | Wet air oxidation process using recycled copper, vanadium or iron catalyst |
| CN104609622A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Treatment method of spent lye from ethylene production |
| CN104876363A (en) * | 2015-05-27 | 2015-09-02 | 华南理工大学 | Catalytic wet oxidation method for up-to-standard discharge of refuse leachate |
| CN105174547A (en) * | 2015-09-25 | 2015-12-23 | 浙江奇彩环境科技有限公司 | Treatment method of organic waste water |
| CN105585102A (en) * | 2016-01-07 | 2016-05-18 | 沈阳化工研究院有限公司 | Treating process of penicillin production wastewater |
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Application publication date: 20190312 |