CN108773941B - A kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water - Google Patents
A kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/52—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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- 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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- C—CHEMISTRY; METALLURGY
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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Abstract
The invention belongs to field of waste water treatment, and in particular to a kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water includes the following steps: step 1, and ferrous sulfate, lanthanide series compound, active carbon and water are mixed, and configuration forms medicament；Step 2, medicament is added into waste water, metal powder is then added, aqueous slkali is added and adjusts pH to 10-11, is stirred to react 60min or more, obtains reaction solution；Step 3, Polyferric Sulfate and polyacrylamide are added in reaction solution, supernatant is extracted after coagulating sedimentation, obtains supernatant and waste residue；Step 4, supernatant is added to the processing of comprehensive wastewater biochemical system, obtains relief liquor；Step 5, filter residue is added to filters pressing in filter press and obtains solid waste, as fixed-end forces.The present invention utilizes the reproducibility of elemental metals and ferrous ion, under alkaline condition, phosphorus drop nitrogen is dropped in the way of absorption and coagulation precipitating, is aided with biochemical system, guarantees that draining reaches national sewage comprehensive emission standard.
Description
Technical field
The invention belongs to field of waste water treatment, and in particular to a kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water.
Background technique
Since the nineties, global electronic industry flourishes, and causes the great attention of various governments, the world.China
Development of the electronics industry after many years, is increasingly becoming the processing factory of world's electronics product manufacturing industry.In electronic product and Xiang Guanjin
In the production and removal process for belonging to product, a large amount of electronics waste water is generated.The ingredient of electronics waste water is different, contained pollutant
Type and content have differences.Electronics industry waste water not only contains heavy metal, also contains acidic materials and alkaline matter.In waste water
Heavy metal ion to have the characteristics that toxic effect long, not biodegradable, and can be enriched in vivo, organism function is made to wad a quilt with cotton
Disorderly serious harm is generated in face of ecological environment and human health；Flushing waste water after Electronics Factory's pickling, not only containing a large amount of acid
Property substance, and phosphorus content is up to 3000-5000mg/L, and total nitrogen content is up to 1000-3000mg/L.
For this high-salt wastewater, if being handled using general halophilic bacteria, since salt figure is excessively high, bacterium is caused
Mortality, and high phosphorus high-nitrogen waste water, using halophilic bacteria processing, P elements treatment effect is bad；For this purpose, publication number
A kind of processing method of high-salt wastewater is disclosed for the Chinese invention patent of CN101928087A, successively the following steps are included: (1)
Alkali is added in the high-salt wastewater, adjusting its pH is 10-11.5, is then precipitated and be separated by solid-liquid separation the removal high-salt wastewater
In most calcium, magnesium hardness；The alkali is NaOH or NaOH and Na2CO3；(2) to adding alkali except the high-salt wastewater after hard
Carry out micro-filtration processing；Micro-filtration processing use membrane aperture for 0.1-1 μm of hollow-fibre membrane, the operation pressure that the micro-filtration is handled
Power is -0.005--0.02MPa, operation temperature is 20-50 DEG C, pH 10-11.5, and the permeation flux of microfiltration membranes is 40-100L/
m2·h；(3) acid is added in the high-salt wastewater by micro-filtration processing, adjusting its pH value is 7-9.5；Then vacuum is carried out
Membrane distillation processing, separates the salt in the high-salt wastewater；The vacuum membrane distillation processing uses hollow fiber film assembly, described
The operating condition of vacuum membrane distillation processing are as follows: 50-80 DEG C of feed liquid temperature, feed velocity 0.5-1.2m/s, cold side vacuum degree 0.07-
0.095MPa。
Waste water in this method is evaporated concentration into membrane distillation system, the rate of recovery for producing water can after pretreatment
To reach 95%, membrane distillation producing water water quality is good, can be with direct reuse in production.But not only energy consumption is high for this method, but also phosphorus
Very poor with the controllability of nitrogen, there are security risks.Current factory entrusts micro- useless processing center as danger wastes,
Processing cost is very high, and up to 2000 yuan or more per ton.
Summary of the invention
For the problems of the prior art, the present invention provides a kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water, utilizes
The reproducibility of elemental metals and ferrous ion is dropped phosphorus drop nitrogen in the way of absorption and coagulation precipitating, is aided with life under alkaline condition
Change system guarantees that draining reaches national sewage comprehensive emission standard.
To realize the above technical purpose, the technical scheme is that
A kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water, includes the following steps:
Step 1, ferrous sulfate, lanthanide series compound, active carbon and water are mixed, configuration forms medicament；
Step 2, medicament is added into waste water, metal powder is then added, aqueous slkali is added and adjusts pH to 10-11, stirring
60min or more is reacted, reaction solution is obtained；
Step 3, Polyferric Sulfate and polyacrylamide are added in reaction solution, supernatant is extracted after coagulating sedimentation, obtains supernatant
And waste residue；
Step 4, supernatant is added to the processing of comprehensive wastewater biochemical system, obtains relief liquor, the wastewater biochemical system
Using traditional A/O technique, the processing time is 12-24h；
Step 5, filter residue is added to filters pressing in filter press and obtains solid waste, as fixed-end forces.
The quality proportioning of medicament in the step 1 is as follows: 50 parts of ferrous sulfate, 0.1 part of lanthanide series compound, active carbon 10
Part, 800 parts of water.
The lanthanide series compound uses lanthanum trichloride.
Additional amount of the medicament in waste water in the step 2 is addition 1kg medicament in every 60kg waste water.
The additional amount of metal powder in the step 2 is addition 30g metal powder, the grain of the metal powder in every 60kg waste water
Diameter is 200 mesh, and the metal powder uses iron powder or aluminium powder.
The additional amount of Polyferric Sulfate in the step 3 is that 1-3kg is added in water per ton.
The additional amount of polyacrylamide in the step 3 is that 2-5g is added in water per ton.
Total nitrogen < 50mg/L in supernatant in the step 3, total phosphorus < 1mg/L.
Lanthanide series compound uses lanthanum trichloride, has good catalytic effect, and ferrous ion is promoted to be converted into iron ion
Efficiency, while lanthanide series can form cooperation chelation structure with phosphate radical, promote the complexing power of medicament, effectively improve
The removal rate of phosphorus.
Ferrous ion is converted into iron ion, and while reducing nitrogen content, iron ion can form ligand complex with phosphate radical
Structure achievees the purpose that drop phosphorus.
Active carbon itself has good adsorptivity, can adsorb to sediment and COD organic matter, promotes drop phosphorus drop
The effect of nitrogen, while active carbon of porous structure ammonia itself has adsorption effect, to reduce the total nitrogen content of solution.
Ferrous sulfate is dissolved in water, and in the absorption of active carbon under, ferrous ion is adsorbed to the more of active carbon
In pore structure, the reproducibility of the absorption system of active carbon and ferrous ion is formed to stable absorbing and reducing system, based on activity
The good adsorption power of charcoal, is able to ascend the reproducibility of ferrous ion.
Under alkaline condition, metal powder is added into waste water, and reaction system at this time is as follows:
NO3 -+8Fe(OH)2+6H2O→NH3+8Fe(OH)3+OH-
3NO3 -+2Al+3H2O→3NO2 -+2Al(OH)3
NO2 -+2Al+5H2O→3NH3+2Al(OH)3+OH-
2NO2 -+2Al+4H2O→N2+2Al(OH)3+2OH-
Iron powder, which is put into integral system, to be capable of forming iron powder and reacts with iron ion, and ferrous ion is formed, it is ensured that it is whole also
Originality.With the progress of reaction, the iron ion and hydroxide ion that reaction system generates are capable of forming flocculent deposit, reach flocculation
Effect.
From the above, it can be seen that the present invention has following advantages:
1. the present invention is precipitated using absorption and coagulation under alkaline condition using the reproducibility of elemental metals and ferrous ion
Mode phosphorus drop nitrogen drops, be aided with biochemical system, guarantee that draining reaches national sewage comprehensive emission standard.
2. the combination that the present invention is settled using chemistry redox and physical absorption, effectively reduces phosphorus content and nitrogen contains
Amount, solves the problems, such as that biochemical system is difficult to handle high phosphorus high-nitrogen waste water.
3. processing cost of the present invention greatly reduces processing cost at 300 yuan/ton.
Specific embodiment
The present invention will be described in detail in conjunction with the embodiments, but does not do any restriction to claim of the invention.
Embodiment 1
A kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water, includes the following steps:
Step 1, ferrous sulfate, lanthanide series compound, active carbon and water are mixed, configuration forms medicament；
Step 2, medicament is added into waste water, metal powder is then added, aqueous slkali is added and adjusts pH to 10, is stirred to react
90min obtains reaction solution；
Step 3, Polyferric Sulfate and polyacrylamide are added in reaction solution, supernatant is extracted after coagulating sedimentation, obtains supernatant
And waste residue；
Step 4, supernatant is added to the processing of comprehensive wastewater biochemical system, obtains relief liquor, the wastewater biochemical system
Using traditional A/O technique, the processing time is 12h；
Step 5, filter residue is added to filters pressing in filter press and obtains solid waste, as fixed-end forces.
The quality proportioning of medicament in the step 1 is as follows: 50 parts of ferrous sulfate, 0.1 part of lanthanide series compound, active carbon 10
Part, 800 parts of water.
The lanthanide series compound uses lanthanum trichloride.
Additional amount of the medicament in waste water in the step 2 is addition 1kg medicament in every 60kg waste water.
The additional amount of metal powder in the step 2 is addition 30g metal powder, the grain of the metal powder in every 60kg waste water
Diameter is 200 mesh, and the metal powder uses iron powder.
The additional amount of Polyferric Sulfate in the step 3 is that 1kg is added in water per ton.
The additional amount of polyacrylamide in the step 3 is that 2g is added in water per ton.
Total nitrogen 46mg/L in supernatant in the step 3, total phosphorus 0.9mg/L.
Embodiment 2
A kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water, includes the following steps:
Step 1, ferrous sulfate, lanthanide series compound, active carbon and water are mixed, configuration forms medicament；
Step 2, medicament is added into waste water, metal powder is then added, aqueous slkali is added and adjusts pH to 11, is stirred to react
75min obtains reaction solution；
Step 3, Polyferric Sulfate and polyacrylamide are added in reaction solution, supernatant is extracted after coagulating sedimentation, obtains supernatant
And waste residue；
Step 4, supernatant is added to the processing of comprehensive wastewater biochemical system, obtains relief liquor, the wastewater biochemical system
Using traditional A/O technique, handling the time is for 24 hours；
Step 5, filter residue is added to filters pressing in filter press and obtains solid waste, as fixed-end forces.
The quality proportioning of medicament in the step 1 is as follows: 50 parts of ferrous sulfate, 0.1 part of lanthanide series compound, active carbon 10
Part, 800 parts of water.
The lanthanide series compound uses lanthanum trichloride.
Additional amount of the medicament in waste water in the step 2 is addition 1kg medicament in every 60kg waste water.
The additional amount of metal powder in the step 2 is addition 30g metal powder, the grain of the metal powder in every 60kg waste water
Diameter is 200 mesh, and the metal powder uses aluminium powder.
The additional amount of Polyferric Sulfate in the step 3 is that 2kg is added in water per ton.
The additional amount of polyacrylamide in the step 3 is that 4g is added in water per ton.
Total nitrogen 40mg/L in supernatant in the step 3, total phosphorus 0.5mg/L.
Embodiment 3
A kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water, includes the following steps:
Step 1, ferrous sulfate, lanthanide series compound, active carbon and water are mixed, configuration forms medicament；
Step 2, medicament is added into waste water, metal powder is then added, aqueous slkali is added and adjusts pH to 11, is stirred to react
100min obtains reaction solution；
Step 3, Polyferric Sulfate and polyacrylamide are added in reaction solution, supernatant is extracted after coagulating sedimentation, obtains supernatant
And waste residue；
Step 4, supernatant is added to the processing of comprehensive wastewater biochemical system, obtains relief liquor, the wastewater biochemical system
Using traditional A/O technique, the processing time is 12-24h；
Step 5, filter residue is added to filters pressing in filter press and obtains solid waste, as fixed-end forces.
The quality proportioning of medicament in the step 1 is as follows: 50 parts of ferrous sulfate, 0.1 part of lanthanide series compound, active carbon 10
Part, 800 parts of water.
The lanthanide series compound uses lanthanum trichloride.
Additional amount of the medicament in waste water in the step 2 is addition 1kg medicament in every 60kg waste water.
The additional amount of metal powder in the step 2 is addition 30g metal powder, the grain of the metal powder in every 60kg waste water
Diameter is 200 mesh, and the metal powder uses iron powder or aluminium powder.
The additional amount of Polyferric Sulfate in the step 3 is that 3kg is added in water per ton.
The additional amount of polyacrylamide in the step 3 is that 5g is added in water per ton.
Total nitrogen 42mg/L in supernatant in the step 3, total phosphorus 0.7mg/L.
Performance test:
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example | |
| COD concentration of emission | 240mg/L | 204mg/L | 145mg/L | 450mg/L |
| Nitrogen removal rate | 95.12% | 96.225 | 96.78% | 80.12% |
| Total tp removal rate | 99.94% | 99.93% | 99.99% | 97.23% |
| Cost | 312 yuan/ton | 312 yuan/ton | 312 yuan/ton | 2000 yuan/ton |
Comparative example handles high phosphorus high-nitrogen waste water using routine techniques.
In conclusion the invention has the following advantages that
1. the present invention is precipitated using absorption and coagulation under alkaline condition using the reproducibility of elemental metals and ferrous ion
Mode phosphorus drop nitrogen drops, be aided with biochemical system, guarantee that draining reaches national sewage comprehensive emission standard.
2. the combination that the present invention is settled using chemistry redox and physical absorption, effectively reduces phosphorus content and nitrogen contains
Amount, solves the problems, such as that biochemical system is difficult to handle high phosphorus high-nitrogen waste water.
3. processing cost of the present invention greatly reduces processing cost at 300 yuan/ton.
It is understood that being merely to illustrate the present invention above with respect to specific descriptions of the invention and being not limited to this
Technical solution described in inventive embodiments.Those skilled in the art should understand that still can be carried out to the present invention
Modification or equivalent replacement, to reach identical technical effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (6)
1. a kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water, characterized by the following steps:
Step 1, ferrous sulfate, lanthanide series compound, active carbon and water are mixed, configuration forms medicament；
Step 2, medicament is added into waste water, metal powder is then added, aqueous slkali is added and adjusts pH to 10-11, is stirred to react
60min or more obtains reaction solution；
Step 3, Polyferric Sulfate and polyacrylamide are added in reaction solution, supernatant is extracted after coagulating sedimentation, obtain supernatant and given up
Slag；
Step 4, supernatant is added to the processing of comprehensive wastewater biochemical system, obtains relief liquor, the wastewater biochemical system uses
Traditional A/O technique, processing time are 12-24h；
Step 5, filter residue is added to filters pressing in filter press and obtains solid waste, as fixed-end forces；
The quality proportioning of medicament in the step 1 is as follows: 50 parts of ferrous sulfate, 0.1 part of lanthanide series compound, 10 parts of active carbon,
800 parts of water, wherein the lanthanide series compound uses lanthanum trichloride.
2. a kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water according to claim 1, it is characterised in that: the step
Additional amount of the medicament in waste water in 2 is addition 1kg medicament in every 60kg waste water.
3. a kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water according to claim 1, it is characterised in that: the step
The additional amount of metal powder in 2 is addition 30g metal powder in every 60kg waste water, and the partial size of the metal powder is 200 mesh, the gold
Belong to powder and uses iron powder or aluminium powder.
4. a kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water according to claim 1, it is characterised in that: the step
The additional amount of Polyferric Sulfate in 3 is that 1-3kg is added in water per ton.
5. a kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water according to claim 1, it is characterised in that: the step
The additional amount of polyacrylamide in 3 is that 2-5g is added in water per ton.
6. a kind of processing method of Electronics Factory's high phosphorus high-nitrogen waste water according to claim 1, it is characterised in that: the step
Total nitrogen < 50mg/L in supernatant in 3, total phosphorus < 1mg/L.
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| CN109607726A (en) * | 2018-11-29 | 2019-04-12 | 浙江正洁环境科技有限公司 | A method of degradation phosphonium flame retardant waste water |
| CN109879470A (en) * | 2018-12-24 | 2019-06-14 | 文树龙 | A kind of processing method of high-concentration phosphorus-containing wastewater |
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