CN110526448A - A kind of processing method of high-concentration phosphorus-containing wastewater - Google Patents
A kind of processing method of high-concentration phosphorus-containing wastewater Download PDFInfo
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
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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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
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Abstract
The invention discloses a kind of processing methods of high-concentration phosphorus-containing wastewater.It the treating method comprises: lye being added into high-concentration phosphorus-containing wastewater, adjusting PH is 7.2-8, so that positive phosphorus root exists in the form of one hydrogen radical of phosphoric acid and dihydrogen phosphate, precipitating reagent is then added, and phosphate radical and precipitating reagent is made to form insoluble chemical compound, filtering；Supercritical water oxidation device is added in filtrate, organic matter, oxygen and water can be thoroughly mixed in the supercritical state as homogeneous phase during the reaction, and it is organic phosphorus to be oxidized to inorganic phosphate radical rapidly, it discharges into liquid phase；Bodied ferric sulfate and anionic polyacrylamide solution are added into the waste water after first supercritical processing, by cohesion and flocculation process, by the heavy removal of phosphate radical.This method uses the method dephosphorization that cooperates with chemical precipitation method of supercritical oxidation, and dephosphorization is thorough rapidly, and dephosphorization range is wider, can handle that high concentration is organic phosphorus and Phos, and total phosphorus content is less than 1mg/L in whole waste water.
Description
Technical field
The present invention relates to technical field of sewage more particularly to a kind of processing methods of high-concentration phosphorus-containing wastewater.
Background technique
Pesticide industry is one of the main industries of China's chemical industry, and 80% is organophosphorus pesticide in China's Pesticidal products,
Its major product has metrifonate, DDVP, Rogor, acephatemet, glyphosate etc..Organophosphorus pesticide wastewater complicated component, pollutant
Concentration is high, and strong toxicity, environmental pollution is extremely serious, is one of waste water more difficult to degrade.Total phosphorus is dense in organophosphorus pesticide waste liquid
Degree is higher, and P elements existence form is complicated, is divided into organic phosphorus and Phos, and phosphorus is mainly with positive microcosmic salt and time Asia in Phos
The form of microcosmic salt exists.Traditional method for removing organic phosphorus or secondary phosphorous salt is first using hypochlorite oxidation or Fenton
Oxidation is translated into positive microcosmic salt, and then positive microcosmic salt is precipitated by way of chemical precipitation.But in pesticide waste liquid
Organic phosphorus extremely difficult degradation, can not be made using chemical oxidization method it is organic phosphorus degradable, moreover, the total phosphorus concentration in pesticide waste liquid
Content is very high, and the conversion of organic phosphorus or secondary phosphorous is positive and is difficult to precipitate completely after microcosmic salt, therefore, in waste water after treatment still
So containing the phosphorus of higher concentration, direct emission still will lead to a degree of environmental pollution, and it is useless to solve high-density phosphorus pesticide
Water harnessing problem has become an outstanding problem for influencing pesticide industry development.
Summary of the invention
It is difficult to completely remove therein organic phosphorus and Phos for the processing method of existing high-density phosphorus agricultural chemicals waste water,
It is difficult to the problem of reaching discharge standard, the present invention provides a kind of processing method of high-concentration phosphorus-containing wastewater.
In order to solve the above technical problems, present invention provide the technical scheme that
A kind of processing method of high-concentration phosphorus-containing wastewater, containing Phos and organic phosphorus in the high-concentration phosphorus-containing wastewater,
The content of the Phos is 1000-10000mg/L, and organic phosphorus content is 1000-5000mg/L, comprising the following steps:
It is 7.2-8 that lye is added in step a, Xiang Suoshu high-concentration phosphorus-containing wastewater and adjusts pH, and precipitating reagent is added and is precipitated,
Filtering, obtains primary treatment liquid；
Step b, by the primary treatment liquid in temperature be 500-650 DEG C, pressure be 22.4-24MPa under conditions of carry out
Supercritical oxidation processing, obtains secondary treatment liquid；
Polymeric ferrous sulphate solution is added in step c, Xiang Suoshu secondary treatment liquid and anionic polyacrylamide solution carries out
Precipitating, filtering.
Compared with the existing technology, the processing method of high-concentration phosphorus-containing wastewater provided by the invention, first to high-density phosphorus
Waste water is pre-processed: the pH for adjusting phosphorus-containing wastewater is 7.2-8, makes the Phos in phosphorus-containing wastewater with one hydrogen radical of phosphoric acid and phosphoric acid
The form of two hydrogen radicals exists, and precipitating reagent is then added, and so that phosphate anion and precipitating reagent is formed insoluble compound precipitating and removes, this
The preprocessing process for walking the phosphorus-containing wastewater of setting can not only make phosphorus-containing wastewater reach the charging standard of supercritical oxidation processing, have
In the liquid phase conducive to release abundant in the form of phosphate organic phosphorus in supercritical oxidation reaction process, moreover it is possible to will be in phosphorus-containing wastewater
Phos carry out certain removal, converted to make can sufficiently to remove supercritical oxidation subsequently through a chemical precipitation
The Phos arrived；By supercritical oxidation handle will in the form of biomass existing for phosphorus oxygen turn to phosphate radical and be sufficiently discharged into liquid phase
In, it lays a good foundation for organic phosphorus abundant removal；Then bodied ferric sulfate and anionic polyacrylamide are added into liquid phase
Solution, the two can form chelate, improve iron ion to the reactivity of phosphate radical, phosphate radical can be made sufficiently to remove, and
The tiny precipitated particles to be formed are made to flocculate to form sediment to greatest extent.The present invention by using multi-step chemical precipitating with
The method that supercritical oxidation mutually cooperates with can effectively remove Phos in high-concentration phosphorus-containing wastewater and organic phosphorus, so that dephosphorization is fast
Fast thoroughly dephosphorization range is wider, and total phosphorus content is less than 1mg/L in final waste water, reaches discharge standard.
Before carrying out pH adjusting to the phosphorus-containing wastewater in step a, needs to carry out phosphorus-containing wastewater total phosphorus, Phos and have
Then the measurement of machine phosphorus content determines the additional amount of precipitating reagent according to the content of Phos.
Preferably, in the high-concentration phosphorus-containing wastewater total phosphorus concentration≤15000mg/L.
Due to organic phosphorous content height, carbon N:P ratio imbalance, it is difficult to which biodegrade, the present invention mention in high-concentration phosphorus-containing wastewater
The processing method of confession is suitble to handle total phosphorus concentration in 15000mg/L high-concentration phosphorus-containing wastewater below, the height that will can wherein contain
The organic phosphorus and Phos of concentration effectively removes, and reaches discharge standard.
Preferably, the added in molar amounts of the precipitating reagent is the amount of inorganic phosphorus substance in the high-concentration phosphorus-containing wastewater
1.5-2 again.
The additional amount of preferred precipitating reagent can remove to greatest extent the Phos in high-concentration phosphorus-containing wastewater, also act as
The effect for adjusting pH makes the waste water for removing Phos reach the charging standard of supercritical oxidation device, reduces phosphorus-containing wastewater to setting
Standby corrosion improves the safety of operation；Meanwhile Phos is removed into the overwhelming majority in advance, it can also reduce subsequent organic phosphorus warp
The removal pressure for the Phos that supercritical oxidation is converted to, to make phosphorus-containing wastewater can be made to reach subsequently through a step precipitation method
Discharge standard.
Preferably, the lye is sodium hydroxide solution, potassium hydroxide solution or calcium hydroxide solution.
Preferably, the precipitating reagent is aluminum sulfate solution, aluminum nitrate solution, ferrum sulfuricum oxydatum solutum, iron nitrate solution, calcium chloride
Solution or calcium hydroxide solution.
It is furthermore preferred that the lye and the precipitating reagent are the calcium hydroxide solution that mass concentration is 8-12%.
Lye and precipitating reagent select mass concentration as the calcium hydroxide solution of 8-12%, can avoid introducing in waste water excessive
Impurity, the calcium hydroxide of preferred concentration is to inorganic phosphate sedimentation effect with higher.
Preferably, in step a, the time of precipitation reaction is 0.5-1.5h.
The preferred precipitation reaction time can make inorganic phosphate radical sufficiently react precipitating with precipitating reagent, reach optimal dephosphorization effect
Fruit.
Optionally, in step b, contained before supercritical oxidation reaction unit is added in the primary treatment liquid according to high concentration
The calorific value of phosphorus waste water carries out modifier treatment, and the substance (such as methanol) of the conventional adjusting calorific value in some this fields is added, makes its calorific value
Reach 3.9-4.5MJ/Kg；The oxidant of supercritical oxidation processing is liquid oxygen, the liquid oxygen and quenched later phosphorous useless
The mass ratio of water is 0.1-0.3:1.
Temperature, the additional amount of pressure and liquid oxygen of preferred supercritical oxidation reaction, can make phosphorous biomass in setting
Thoroughly degrade under the conditions of supercritical oxidation, make it is organic phosphorus be sufficiently released to liquid phase, to realize organic phosphorus maximum conversion, in turn
Be conducive to remove to greatest extent organic phosphorus in phosphorus-containing wastewater.
Preferably, the mass concentration of the polymeric ferrous sulphate solution is 11-11.5%.
The reticular structure for forming ferric sulfate molecular cluster is added in phosphorus-containing wastewater in bodied ferric sulfate, by big in its reticular structure
The ol bridge of amount reacts rapidly formation precipitating with phosphate radical, and the hydrating polymer of iron ion is also by compression double electric layer, absorption electricity
The effects of neutralization, bridging and netting, plays the effect of dephosphorization.Therefore, the addition of bodied ferric sulfate is conducive to organic phosphorus fast of high concentration
Speed removal makes step precipitating remove the Phos that supercritical oxidation converts and is achieved.
Preferably, the additional amount of the polymeric ferrous sulphate solution is 15-20 times of total phosphorus quality in the secondary treatment liquid.
The additional amount of preferred polymeric ferrous sulphate solution can sufficiently remove the Phos that supercritical oxidation converts, and make to give up
Total phosphorus is phosphorous in water is lower than 1mg/L, and it is less to form sludge quantity.
Preferably, in step c, the mass concentration of the anionic polyacrylamide solution is 0.1-0.15%.
Preferably, the mass ratio of institute's anionic polyacrylamide solution and the secondary treatment liquid is 0.5-1:100.
Preferred anionic polyacrylamide solution, small of the non-solubility that bodied ferric sulfate and phosphate radical can be made to be formed
Grain and other suspended matters are condensed, and little particle is made to be bonded as bulky grain, so that the phosphoric acid insoluble matter of precipitating be made thoroughly to be settled out
Come, to reduce the phosphorus content in waste water.
The present invention selects anionic polyacrylamide and bodied ferric sulfate to cooperate, anionic polyacrylamide and polyaluminum sulfate
Chelate is formed by hydrogen bond or electrostatic interaction between iron, the reactivity of iron ion and phosphate radical is improved, is conducive to phosphoric acid
The rapid precipitation of root is conducive to the abundant removal of phosphate radical, and it is molten to avoid traditional precipitating reagent such as ferric sulfate, PFC solution, PAC
The flocculating effects such as liquid are bad, and sludge output is big, to prevent phosphate radical from sufficiently removing, it is necessary to repeatedly the drawbacks of precipitating.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
A kind of processing method of high-concentration phosphorus-containing wastewater:
Step a takes phosphorous agricultural chemicals waste water 10t, and wherein content of inorganic phosphorus is 1245mg/L and organic phosphorous content is for measurement
The calcium hydroxide solution that mass fraction is 10% is added in 2398mg/L, Xiang Suoshu agricultural chemicals waste water, adjusting pH is 7.5, in addition
The calcium hydroxide solution 0.45t that mass fraction is 10% is stated, precipitation reaction 0.5h is carried out, filtering obtains primary treatment liquid；
Step b, by the primary treatment liquid carry out it is quenched, so that its calorific value is reached 3.9-4.5MJ/Kg, then will be quenched after
Waste liquid be added supercritical oxidation reaction unit in, in temperature be 600 DEG C, pressure be 23MPa under conditions of carry out overcritical oxygen
Change reaction, reaction time 3.5h is cooled to 55 DEG C, and water outlet obtains secondary treatment liquid 50t；
The secondary treatment liquid is added in dephosphorization reaction tank step c, and the PFS solution that mass fraction is 11.3% is added
400Kg, the anion PAM solution 500Kg that mass fraction is 0.1% are precipitated, and after filtering, total phosphorus content is in filtrate
0.2mg/L, COD 31.9mg/L, reach discharge standard.
Embodiment 2
A kind of processing method of high-concentration phosphorus-containing wastewater:
Step a takes phosphorous agricultural chemicals waste water 10t, and wherein content of inorganic phosphorus is 6545mg/L and organic phosphorous content is for measurement
The calcium hydroxide solution that mass fraction is 8% is added in 8625mg/L, Xiang Suoshu agricultural chemicals waste water, adjusting pH is 7.2, is added above-mentioned
Mass fraction is 3.52 tons of calcium hydroxide solution of 8%, carries out precipitation reaction 1.5h, and filtering obtains primary treatment liquid；
Step b, by the primary treatment liquid carry out it is quenched, so that its calorific value is reached 3.9-4.5MJ/Kg, then will be quenched after
Waste liquid be added supercritical oxidation reaction unit in, in temperature be 500 DEG C, pressure be 22.4MPa under conditions of carry out it is overcritical
Oxidation reaction, reaction time 3.5h are cooled to 50 DEG C, and water outlet obtains secondary treatment liquid 50000L；
The secondary treatment liquid is added in dephosphorization reaction tank step c, and the PFS solution that mass fraction is 11% is added
1.3t, the anion PAM solution 250Kg that mass fraction is 0.1% are precipitated, and after filtering, total phosphorus content is in filtrate
0.35mg/L, COD 39.4mg/L, reach discharge standard.
Embodiment 3
A kind of processing method of high-concentration phosphorus-containing wastewater:
Step a takes 10 tons of phosphorous agricultural chemicals waste water, and wherein content of inorganic phosphorus is 5630mg/L and organic phosphorous content is for measurement
The calcium hydroxide solution that mass fraction is 12% is added in 6851mg/L, Xiang Suoshu agricultural chemicals waste water, adjusting pH is 8.0, in addition
The calcium hydroxide solution 2.2t that mass fraction is 12% is stated, precipitation reaction 1.0h is carried out, filtering obtains primary treatment liquid；
Step b, by the primary treatment liquid carry out it is quenched, so that its calorific value is reached 3.9-4.5MJ/Kg, then will be quenched after
Waste liquid be added supercritical oxidation reaction unit in, in temperature be 650 DEG C, pressure be 24MPa under conditions of carry out overcritical oxygen
Change reaction, reaction time 3.5h is cooled to 50-60 DEG C, and water outlet obtains secondary treatment liquid 50t；
The secondary treatment liquid is added in dephosphorization reaction tank step c, and the PFS solution that mass fraction is 11.3% is added
1.37t, the anion PAM solution 400Kg that mass fraction is 0.1% are precipitated, and after filtering, total phosphorus content is in filtrate
0.3mg/L, COD 41.8mg/L, reach discharge standard.
Comparative example 1
A kind of processing method of high-concentration phosphorus-containing wastewater:
Step a takes 10 tons of phosphorous agricultural chemicals waste water, and wherein content of inorganic phosphorus is 1245mg/L and organic phosphorous content is for measurement
The calcium hydroxide solution that mass fraction is 10% is added in 2398mg/L, Xiang Suoshu agricultural chemicals waste water, adjusting pH is 7.5, is obtained primary
Treatment fluid；
Step b, by the primary treatment liquid carry out it is quenched, so that its calorific value is reached 3.9-4.5MJ/Kg, then will be quenched after
Waste liquid be added supercritical oxidation reaction unit in, in temperature be 600 DEG C, pressure be 23MPa under conditions of carry out overcritical oxygen
Change reaction, reaction time 3.5h is cooled to 50-60 DEG C, and water outlet obtains 50 tons of secondary treatment liquid；
The secondary treatment liquid is added in dephosphorization reaction tank step c, and the PFS solution that mass fraction is 11.3% is added
585Kg, the anion PAM solution 500Kg that mass fraction is 0.1% are precipitated, and after filtering, total phosphorus content is in filtrate
23.8mg/L, COD 82.5mg/L.
Comparative example 2
A kind of processing method of high-concentration phosphorus-containing wastewater:
Step a takes 10 tons of phosphorous agricultural chemicals waste water, and wherein content of inorganic phosphorus is 1245mg/L and organic phosphorous content is for measurement
The calcium hydroxide solution that mass fraction is 10% is added in 2398mg/L, Xiang Suoshu agricultural chemicals waste water, adjusting pH is 7.5, in addition
0.45 ton of calcium hydroxide solution that mass fraction is 10% is stated, is precipitated, filters, obtains primary treatment liquid；
Step b, by the primary treatment liquid carry out it is quenched, so that its calorific value is reached 3.9-4.5MJ/Kg, then will be quenched after
Waste liquid be added supercritical oxidation reaction unit in, in temperature be 600 DEG C, pressure be 23MPa under conditions of carry out overcritical oxygen
Change reaction, reaction time 3.5h is cooled to 50-60 DEG C, and water outlet obtains 50 tons of secondary treatment liquid；
The secondary treatment liquid is added in dephosphorization reaction tank step c, and the PFC solution that mass fraction is 11.3% is added
400Kg, the anion PAM solution 500Kg that mass fraction is 0.1% are precipitated, and after filtering, total phosphorus content is in filtrate
5.6mg/L, COD 62.7mg/L.
Comparative example 3
A kind of processing method of high-concentration phosphorus-containing wastewater:
Step a takes 10 tons of phosphorous agricultural chemicals waste water, and wherein content of inorganic phosphorus is 1245mg/L and organic phosphorous content is for measurement
The calcium hydroxide solution that mass fraction is 10% is added in 2398mg/L, Xiang Suoshu agricultural chemicals waste water, adjusting pH is 7.5, in addition
0.45 ton of calcium hydroxide solution that mass fraction is 10% is stated, is precipitated, filters, obtains primary treatment liquid；
Step b, by the primary treatment liquid carry out it is quenched, so that its calorific value is reached 3.9-4.5MJ/Kg, then will be quenched after
Waste liquid be added supercritical oxidation reaction unit in, in temperature be 600 DEG C, pressure be 23MPa under conditions of carry out overcritical oxygen
Change reaction, reaction time 3.5h is cooled to 50-60 DEG C, and water outlet obtains 50 tons of secondary treatment liquid；
The secondary treatment liquid is added in dephosphorization reaction tank step c, and the PFS solution that mass fraction is 11.3% is added
400Kg, the cationic PAM solution 500Kg that mass fraction is 0.1% are precipitated, and after filtering, total phosphorus content is in filtrate
2.4mg/L, COD 51.3mg/L.
Quenched substance used is methanol, the oxidation of supercritical oxidation processing in above-described embodiment 1-3 and comparative example 1-3
Agent is liquid oxygen, and the mass ratio of the liquid oxygen and quenched later phosphorus-containing wastewater is 0.1-0.3:1.Supercritical oxidation reaction unit
Treating capacity is 3t/h.
Other in the present invention adjust the combination of lye and precipitating reagent used in pH without using mass fraction in the present invention
Phosphor-removing effect for the calcium hydroxide solution of 8-12% is good, but can achieve imitates technology of the total phosphorus content less than 1mg/L
Fruit.
And it can be seen that by above-mentioned comparative example 2-3 and deposited between bodied ferric sulfate of the present invention and anionic polyacrylamide
In the effect of collaboration dephosphorization, by one of substitution of materials, it is unable to reach the technical effect that total phosphorus content is less than 1mg/L.
And can be seen that in the Phos and organic phosphorus concentration range that limit in the present invention by above-mentioned comparative example 3,
The Phos converted using PFS solution and cationic PAM solution removal supercritical oxidation, can not be such that the total phosphorus in waste water contains
Amount is lower than 1mg/L, but can achieve sewage plant and receive standard, can qualified discharge after sewage plant secondary treatment.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of processing method of high-concentration phosphorus-containing wastewater, Phos and organic phosphorus, institute are contained in the high-concentration phosphorus-containing wastewater
State Phos content be 1000-10000mg/L, organic phosphorus content be 1000-5000mg/L, which is characterized in that including with
Lower step:
Lye is added in step a, Xiang Suoshu high-concentration phosphorus-containing wastewater, adjusting pH is 7.2-8, precipitating reagent is added and is precipitated, mistake
Filter, obtains primary treatment liquid；
The primary treatment liquid in temperature is 500-650 DEG C by step b, and pressure carries out super faces under conditions of being 22.4-24MPa
Boundary's oxidation processes obtain secondary treatment liquid；
Polymeric ferrous sulphate solution is added in step c, Xiang Suoshu secondary treatment liquid and anionic polyacrylamide solution is precipitated,
Filtering.
2. the processing method of high-concentration phosphorus-containing wastewater as described in claim 1, which is characterized in that in step a, the precipitating reagent
Added in molar amounts be 1.5-2 times of amount of inorganic phosphorus substance in the high-concentration phosphorus-containing wastewater.
3. the processing method of high-concentration phosphorus-containing wastewater as claimed in claim 1 or 2, which is characterized in that the lye is hydrogen-oxygen
Change sodium solution, potassium hydroxide solution or calcium hydroxide solution.
4. the processing method of high-concentration phosphorus-containing wastewater as claimed in claim 1 or 2, which is characterized in that the precipitating reagent is sulphur
Sour aluminum solutions, aluminum nitrate solution, ferrum sulfuricum oxydatum solutum, iron nitrate solution, calcium chloride solution or calcium hydroxide solution.
5. the processing method of high-concentration phosphorus-containing wastewater as claimed in claim 4, which is characterized in that the lye and the precipitating
Agent is the calcium hydroxide solution that mass concentration is 8-12%.
6. the processing method of high-concentration phosphorus-containing wastewater as described in claim 1, which is characterized in that in step a, the time of precipitating
For 0.5-1.5h.
7. the processing method of high-concentration phosphorus-containing wastewater as described in claim 1, which is characterized in that in step c, the polymerised sulphur
The mass concentration of sour ferrous solution is 11-11.5%.
8. the processing method of high-concentration phosphorus-containing wastewater as claimed in claim 7, which is characterized in that the polymeric ferrous sulphate solution
Additional amount be 15-20 times of total phosphorus quality in the secondary treatment liquid.
9. the processing method of high-concentration phosphorus-containing wastewater as described in claim 1, which is characterized in that in step c, the anion
The mass concentration of polyacrylamide solution is 0.1-0.15%.
10. the processing method of high-concentration phosphorus-containing wastewater as claimed in claim 9, which is characterized in that the anion pp
The mass ratio of amide solution and the secondary treatment liquid is 0.5-1:100.
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| CN112374642A (en) * | 2020-10-30 | 2021-02-19 | 格林美（江苏）钴业股份有限公司 | Method for removing phosphorus element in raffinate by adopting polymeric ferric sulfate |
| CN113045022A (en) * | 2021-04-21 | 2021-06-29 | 新地环保技术有限公司 | Supercritical water oxidation treatment phosphorus-containing waste and phosphorus recovery method |
| NL2028950A (en) * | 2020-09-04 | 2021-10-06 | Univ Liaoning Technical | Novel compounding method for high-efficiently removing phosphorus |
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| CN111392997B (en) * | 2020-05-19 | 2022-03-01 | 杭州秀澈环保科技有限公司 | Recycling process of organophosphorus sludge |
| NL2028950A (en) * | 2020-09-04 | 2021-10-06 | Univ Liaoning Technical | Novel compounding method for high-efficiently removing phosphorus |
| CN112374642A (en) * | 2020-10-30 | 2021-02-19 | 格林美（江苏）钴业股份有限公司 | Method for removing phosphorus element in raffinate by adopting polymeric ferric sulfate |
| CN113045022A (en) * | 2021-04-21 | 2021-06-29 | 新地环保技术有限公司 | Supercritical water oxidation treatment phosphorus-containing waste and phosphorus recovery method |
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