CN106673255A - Wastewater treatment method and wastewater treatment device - Google Patents
Wastewater treatment method and wastewater treatment device Download PDFInfo
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- CN106673255A CN106673255A CN201611199135.0A CN201611199135A CN106673255A CN 106673255 A CN106673255 A CN 106673255A CN 201611199135 A CN201611199135 A CN 201611199135A CN 106673255 A CN106673255 A CN 106673255A
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 62
- 239000000701 coagulant Substances 0.000 claims abstract description 54
- 238000005345 coagulation Methods 0.000 claims abstract description 48
- 230000015271 coagulation Effects 0.000 claims abstract description 48
- 239000000203 mixture Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000005189 flocculation Methods 0.000 claims abstract description 31
- 230000016615 flocculation Effects 0.000 claims abstract description 31
- 239000002351 wastewater Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000000926 separation method Methods 0.000 claims abstract description 26
- 230000001112 coagulating effect Effects 0.000 claims description 47
- 238000004062 sedimentation Methods 0.000 claims description 45
- 238000010521 absorption reaction Methods 0.000 claims description 44
- 239000010802 sludge Substances 0.000 claims description 43
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 40
- 230000008569 process Effects 0.000 claims description 34
- 238000003756 stirring Methods 0.000 claims description 29
- 239000002250 absorbent Substances 0.000 claims description 24
- 230000002745 absorbent Effects 0.000 claims description 24
- 238000003672 processing method Methods 0.000 claims description 15
- 238000000746 purification Methods 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 7
- DKFCNIGGENJIJN-UHFFFAOYSA-L aluminum;iron(2+);sulfate Chemical compound [Al+3].[Fe+2].[O-]S([O-])(=O)=O DKFCNIGGENJIJN-UHFFFAOYSA-L 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 5
- 239000000440 bentonite Substances 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- 239000000571 coke Substances 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 31
- 238000001179 sorption measurement Methods 0.000 abstract description 22
- 230000008901 benefit Effects 0.000 abstract description 13
- 239000003463 adsorbent Substances 0.000 abstract description 10
- 239000008213 purified water Substances 0.000 abstract description 10
- 239000008394 flocculating agent Substances 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 description 32
- 231100000719 pollutant Toxicity 0.000 description 32
- 238000002156 mixing Methods 0.000 description 27
- 239000010893 paper waste Substances 0.000 description 15
- 239000010865 sewage Substances 0.000 description 13
- 239000003814 drug Substances 0.000 description 12
- 239000000126 substance Substances 0.000 description 12
- 229920002401 polyacrylamide Polymers 0.000 description 10
- 239000000084 colloidal system Substances 0.000 description 8
- 238000005273 aeration Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000000356 contaminant Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 150000003384 small molecules Chemical class 0.000 description 6
- 238000003911 water pollution Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000010668 complexation reaction Methods 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000536 complexating effect Effects 0.000 description 3
- 230000003311 flocculating effect Effects 0.000 description 3
- 239000000413 hydrolysate Substances 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 231100001234 toxic pollutant Toxicity 0.000 description 1
- 239000003403 water pollutant 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F1/28—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
-
- 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
- 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
-
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a wastewater treatment method and a wastewater treatment device. The wastewater treatment method comprises the following steps: carrying out first-time coagulation treatment on wastewater by adopting a first coagulant to obtain a first mixture; to carrying out physical adsorption treatment on the first mixture by adopting a physical adsorbent to obtain a second mixture; carrying out second-time coagulation treatment on the second mixture by adopting a second coagulant to obtain a third mixture; carrying out a flocculation treatment on the third mixture by adopting a flocculating agent to obtain a fourth mixture; and carrying out solid-liquid separation on the fourth mixture to obtain purified water. By taking advantage of the wastewater treatment method disclosed by the invention, the purifying effect of the wastewater can be remarkably improved, and the method has the advantages of low cost and easiness in operation.
Description
Technical field
The present invention relates to field of waste water treatment, in particular to a kind of method of wastewater treatment and processing meanss.
Background technology
On June 25th, 2008, national environmental protection portion have approved《Pulp and paper industry pollution discharge standard》(GB3544-
2008) have adjusted discharge standard system.New standard improves the requirement of slurry papermaking enterprise Sewage Water Emissions, simultaneously for needs
The region of special protection then defines the special emission limit of water pollutant.At present country's papermaking enterprise generally adopts biochemical treatment side
Method, its water outlet still contains a certain amount of pollutant, is difficult to only with the conventional tertiary treatment technology effluent quality such as coagulating sedimentation
Reach the requirement of new standard, therefore the further treatment technique for paper waste becomes the focus of research.Existing paper waste
Further treatment technique mainly has the technologies such as coagulant sedimentation, adsorbent absorption method, advanced oxidation processes.
Wherein coagulation is one of at present the most frequently used advanced treatment process, often with precipitation, the link such as filter and be connected, to Jing lifes
Waste water after change is processed carries out advanced treating, while the indexs such as colloidal suspended substance, CODcr are removed, also removes a part of color
Degree.The technique has preferable removal effect to water-borne glue body and hydrophobic Organic substance, but for hydrophilic dissolubility has
Machine thing, removal effect is not good.
Absorption method is, using porous solid matter, to make one or more material in waste water be adsorbed to the surface of solids
And the method for removing, it can be used for the purpose such as deodorization and organics removal, colloid, microorganism and residual chlorine.It is characterized in processing effect
It is really good, CODCR can be reduced to very low, and equipment is simple, but regeneration is needed after adsorption saturation, operation inconvenience and operating cost compared with
Height, generally as the subsequent treatment means of coagulation treatment method.
High-level oxidation technology includes Fenton oxidation method, photocatalytic oxidation, electrochemical oxidation technology, Ozonation
Deng, with response speed it is fast, treatment effeciency is high, to toxic pollutant destruction thoroughly, non-secondary pollution, applied widely, easy behaviour
The advantages of making.The mainly Fenton oxidation method of practical application in current industry.The construction cost of high-level oxidation technology and process
Relatively costly, wherein Fenton is starched in sheet type manufacturing enterprises actual motion case different, and ton cost of water treatment is 1.5~5.0
Unit, or even can be higher.These high-level oxidation technology operation difficulties are relatively large, and of a relatively high govern of operating cost is given up in papermaking
Water depth process aspect commercial Application, it is actually rare in the practical application of actual paper waste advanced treating.
As shown in the above, at present for the process of paper waste has the purification defect such as thorough, processing cost height.
The content of the invention
The present invention is intended to provide a kind of method of wastewater treatment and processing meanss, to solve prior art in for paper waste
Process purification not thoroughly, the high problem of processing cost.
To achieve these goals, according to an aspect of the invention, there is provided a kind of method of wastewater treatment, it include with
Lower step：Coagulating treatment is carried out to waste water using the first coagulant, the first mixture is obtained；Using physical absorbent to
One mixture carries out physical absorption process, obtains the second mixture；The second mixture is carried out using the second coagulant secondary mixed
It is solidifying to process, obtain the 3rd mixture；Flocculation treatment is carried out to the 3rd mixture using flocculant, the 4th mixture is obtained；And
Solid-liquid separation is carried out to the 4th mixture, water is purified.
Further, the first coagulant and the second coagulant be each independently selected from polyaluminium aluminium iron sulfate coagulant,
One or more in aluminium polychlorid coagulant and poly-ferric chloride coagulant.
Further, the first coagulant is polyaluminium aluminium iron sulfate coagulant, and the second coagulant is mixed for aluminium polychlorid
Solidifying agent.
Further, physical absorbent is one or more in activated carbon, activated coke and bentonite.
Further, flocculant is PAM flocculant.
Further, the dosage of the first coagulant is 300~1000mg/L, and the dosage of preferably the second coagulant is
100~200mg/L, the dosage of preferred physical absorbent is 20~100mg/L, the dosage of preferred flocculant is 0.5~
1.5mg/L。
Further, in the step of coagulating treatment, hydraulic detention time is 2~5min；It is preferred that physical absorption is processed
The step of in, hydraulic detention time be 15~25min；It is preferred that in the step of second coagulation is processed, hydraulic detention time is 2~
5min；It is preferred that in the step of flocculation treatment, hydraulic detention time is 4~8min.
Further, in the step of solid-liquid separation, solid-liquid separation is carried out by the way of sloping plate deposition；It is preferred that solid-liquid separation
During, upflow velocity is 10~15m/h.
Further, in the step of solid-liquid separation, while obtaining sludge；Processing method is further comprising the steps of：By part
Sludge is back in the first mixture carries out physical absorption process.
Further, before the step of carrying out a coagulation, the step of biochemical treatment is carried out to waste water is also included.
According to a further aspect in the invention, a kind of wastewater treatment equipment is additionally provided, it includes being sequentially connected in series the one of setting
Secondary coagulating basin, physical absorption pond, second coagulation pond, flocculation basin and sedimentation tank.
Further, wastewater treatment equipment also includes biochemistry pool, and biochemistry pool is connected with a coagulating basin, and biochemistry pool is located at
The upstream of coagulating basin.
Further, sedimentation tank is inclined-plate clarifying basin.
Further, sedimentation tank is provided with sludge outlet, and sludge outlet is connected with physical absorption pond.
Further, sludge outlet is arranged on the bottom of sedimentation tank.
Further, wastewater treatment equipment also includes mud discharging pipeline, mud discharging pipeline and sludge outlet and physics
Pipeline connection between adsorption tank.
Further, sedimentation tank is additionally provided with treated water outlet, and treated water outlet is arranged on the top of sedimentation tank.
Further, wastewater treatment equipment also includes：First stirring slurry, the first stirring slurry is arranged in a coagulating basin；
Second stirring paddle, the second stirring paddle is arranged in physical absorption pond；3rd stirring paddle, the 3rd stirring paddle is arranged on second coagulation pond
In；And the 4th stirring paddle, the 4th stirring paddle is arranged in flocculation basin.
The method of wastewater treatment that the present invention is provided, combines coagulating treatment, physical absorption and flocculation treatment.Specifically：
Using a coagulating treatment, the pollutant such as colloid, float in waste water can be made by the hydrolysis of the first coagulant
Product is swept and is caught, and forms flco, and most of hydrophobicity and macromolecule contaminant can be removed in the stage in waste water.Further
Processed using physical absorption, the hydrolyzate of the coagulant of part first continues and the mutual complexation of physical absorbent, condense formed compared with
Big flocculating body improves coagulation effect, while the adsorption of physical absorbent makes waste water be difficult to little point that coagulation is removed on last stage
Sub- pollutant, hydrophilic pollutant are effectively removed.The second mixture Jing after physical absorption goes successively to second coagulation, contains
The flco for having physical absorbent further increases in this stage, and mixed heavy effect is further strengthened.3rd mixture is entered
After flocculated stage, flco further mutually condenses, and solid-liquid separation is finally realized in solid-liquid separation process, is purified water.
Above-mentioned processing method takes full advantage of the advantage of each medicament, waste water can be included into float, colloid, hydrophobicity
All kinds of impurity such as pollutant, small molecule, hydrophilic, dissolved pollutant are fully removed.Meanwhile, physical absorption is processed and is placed in one
After secondary coagulating treatment, before second coagulation process and flocculation treatment, coagulant hydrolysate can be utilized with physical absorbent
Complexing, borrows the flco gradually grown up, and can further improve the removal effect of Pollutants in Wastewater, and can effectively carry
The effect of high solid-liquid separation.Additionally, compared to the first coagulating sedimentation mode that again physical absorption is processed, the present invention is arranged such, nothing
The process sections such as physical absorption filter tank need to be again built, adsorbent can be obtained by separating in the coagulating sedimentation stage, greatly save investment
With occupation of land.In a word, using the method for wastewater treatment that the present invention is above-mentioned, the clean-up effect of waste water can be significantly improved, and with low
Cost, easy-operating advantage.
Description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and the present invention's shows
Meaning property embodiment and its illustrated for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the schematic diagram of wastewater treatment equipment according to an embodiment of the present；
Wherein, above-mentioned accompanying drawing includes the following drawings labelling：
10th, a coagulating basin；11st, the first stirring slurry；20th, physical absorption pond；21st, the second stirring paddle；30th, second coagulation
Pond；31st, the 3rd stirring paddle；40th, flocculation basin；41st, the 4th stirring paddle；50th, sedimentation tank；501st, sludge outlet；502nd, purified water goes out
Mouthful.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.The present invention is described in detail below in conjunction with embodiment.
As described by background section, it is poor, high cost scarce to there is clean-up effect in existing method of wastewater treatment
Fall into.
In order to solve this problem, the invention provides a kind of method of wastewater treatment, it is comprised the following steps：Using first
Coagulant carries out a coagulating treatment to waste water, obtains the first mixture；Thing is carried out to the first mixture using physical absorbent
Reason adsorption treatment, obtains the second mixture；Second coagulation process is carried out to the second mixture using the second coagulant, the 3rd is obtained
Mixture；Flocculation treatment is carried out to the 3rd mixture using flocculant, the 4th mixture is obtained；And the 4th mixture is carried out
Solid-liquid separation, is purified water.
Using a coagulating treatment, the pollutant such as colloid, float in waste water can be made by the hydrolysis of the first coagulant
Product is swept and is caught, and forms flco, and most of hydrophobicity and macromolecule contaminant can be removed in the stage in waste water.Further
Processed using physical absorption, the hydrolyzate of the coagulant of part first continues and the mutual complexation of physical absorbent, condense formed compared with
Big flocculating body improves coagulation effect, while the adsorption of physical absorbent makes waste water be difficult to little point that coagulation is removed on last stage
Sub- pollutant, hydrophilic pollutant are effectively removed.The second mixture Jing after physical absorption goes successively to second coagulation, contains
The flco for having physical absorbent further increases in this stage, and mixed heavy effect is further strengthened.3rd mixture is entered
After flocculated stage, flco further mutually condenses, and solid-liquid separation is finally realized in solid-liquid separation process, is purified water.
Above-mentioned processing method takes full advantage of the advantage of each medicament, waste water can be included into float, colloid, hydrophobicity
All kinds of impurity such as pollutant, small molecule, hydrophilic, dissolved pollutant are fully removed.Meanwhile, physical absorption is processed and is placed in one
After secondary coagulating treatment, before second coagulation process and flocculation treatment, coagulant hydrolysate can be utilized with physical absorbent
Complexing, borrows the flco gradually grown up, and can further improve the removal effect of Pollutants in Wastewater, and can effectively carry
The effect of high solid-liquid separation.Additionally, compared to the first coagulating sedimentation mode that again physical absorption is processed, the present invention is arranged such, nothing
The process sections such as physical absorption filter tank need to be again built, adsorbent can be obtained by separating in the coagulating sedimentation stage, greatly save investment
With occupation of land.In a word, using the method for wastewater treatment that the present invention is above-mentioned, the clean-up effect of waste water can be significantly improved, and with low
Cost, easy-operating advantage.When especially processing paper waste, the purified water of output meets the discharge standard of GB3544-2008.
What is adopted in above-mentioned coagulating treatment step can be the arbitrary coagulant in this area.In one kind preferred embodiment
In, the first coagulant and the second coagulant are each independently selected from polyaluminium aluminium iron sulfate coagulant, aluminium polychlorid coagulation
One or more in agent and poly-ferric chloride coagulant.It is highly preferred that the first coagulant is polyaluminium aluminium iron sulfate coagulation
Agent, the second coagulant is aluminium polychlorid coagulant.
Polyaluminium aluminium iron sulfate (PAFCS) is the new and effective coagulant researched and developed in recent years, and aluminium polychlorid is compared in form
(PAC), poly-ferric chloride (PFC) is more complicated, and the double salt of a large amount of high poly- complexation bodies is produced after hydrolysis, the coagulation effect in water process
Fruit is applied PAFCS in paper waste advanced treating, to pollutant such as colloid, float considerably beyond other simple ions
Removal effect it is fairly obvious.And PAFCS is adopted a coagulation stage, and PAC is adopted in the second coagulation stage, it is on the one hand favourable
In the clearance for improving pollutant, be on the one hand conducive to cost-effective.
The physical absorbent that above-mentioned physical absorption is adopted in processing can be physical absorbent commonly used in the art.In one kind
In preferred embodiment, physical absorbent is one or more in activated carbon, activated coke and bentonite.More preferably physics is inhaled
Attached dose is activated carbon.More hydrophilic dissolved pollutant and small molecule contaminants, this partial contamination thing are usually contained in waste water
Removed by the stronger adsorption of Powdered Activated Carbon, therefore, it is possible to the clearance for further improving pollutant.
After being especially combined PAFCS and activated carbon, the most pollutant in waste water can be removed effectively.More
Especially, Jing after a coagulating treatment, further to add after Powdered Activated Carbon, the mutual network of hydrolyzate of burgy and PAFSC
Close, be more beneficial for the formation of alumen ustum.And flco condensed upon and formed around burgy after larger alumen ustum, sedimentation velocity is very fast, can be with
Save the medicament usage amount of follow-up flocculant.
The purpose of above-mentioned flocculation treatment is that the flco that earlier stage is formed further flocculates, in order to the solid-liquid point in later stage
From process.In a preferred embodiment, flocculant is PAM (polyacrylamide) flocculant.It is highly preferred that flocculant is
PAM flocculant, the Flocculating Effect of Flocculant is obvious, and cost is relatively low.
According to the species and containing filth amount of waste water, those skilled in the art can be carried out for the added amount of chemical in each stage
Adjustment.In a preferred embodiment, the dosage of the first coagulant be 300~1000mg/L, preferably the second coagulant
Dosage be 100~200mg/L, the dosage of preferred physical absorbent is 20~100mg/L, the dosage of preferred flocculant
For 0.5~1.5mg/L.Respectively throughout the reason stage adds above-mentioned consumption two-stage nitration medicament, on the one hand can improve useless water purification
Effect, on the one hand can also save medicament, reduces cost.Above-mentioned dosage is the addition of the medicament relative to per liter of process object
Amount, for example, the dosage of the second coagulant is that 100~200mg/L is mixed equivalent to second added in second mixture of 1L
The amount of solidifying agent is 100~200mg.
In a preferred embodiment, in the step of coagulating treatment, hydraulic detention time is 2~5min；It is excellent
In the step of selecting physical absorption to process, hydraulic detention time is 15~25min；It is preferred that in the step of second coagulation is processed, waterpower
The time of staying is 2~5min；It is preferred that in the step of flocculation treatment, hydraulic detention time is 4~8min.Under the process time, give up
Water purification is better.
In addition to time and added amount of chemical, the wastewater treatment of each step is carried out preferably under conditions of stirring, such as：One
In secondary coagulating treatment, blender mixing speed is 280r/min.In physical absorption process step, blender mixing speed is
280r/min.In second coagulation process step, blender mixing speed 280r/min, hydraulic detention time is 3min.At flocculation
In reason step, blender mixing speed 200r/min.
Preferably, in the step of solid-liquid separation, solid-liquid separation is carried out by the way of sloping plate deposition.Solid-liquid separation is in precipitation
Carry out in pond (such as plus sand high speed pellets pond), because the alumen ustum that the technique is produced is larger, and contain physical absorbent, sludge sinks
Drop speed, so sedimentation tank can keep higher upflow velocity, and water outlet is as clear as crystal, stable effluent quality.It is excellent
During selecting solid-liquid separation, upflow velocity is 10~15m/h.
In a preferred embodiment, in the step of above-mentioned solid-liquid separation, while obtaining sludge；Processing method is also wrapped
Include following steps：Partial sludge is returned, adding carries out physical absorption process into the first mixture.In view of clarifier sludge
In the adsorbent containing unadsorbed saturation, therefore by the way that precipitating sludge is back to into front end, make residual pharmacy continue to play a role,
High concentration coagulant adsorbent environment is defined, the removal of pollutant is not only contributed to, a large amount of medicaments can also be saved.
Excellent clean-up effect can be realized using the above-mentioned processing method of the present invention.In a kind of preferred embodiment
In, before the step of carrying out a coagulation, also include the step of biochemical treatment is carried out to waste water.This is conducive to further improvement
Clean-up effect.
In actual application, above-mentioned biochemical treatment step is carried out in biochemical system.Preferably, partial sludge is returned
The biological tank front end of biochemical system is flow to, physical absorbent is contained in sludge, biological tank adds physical absorbent and on the one hand can carry
High sludge activity, improves sludge settling performance, is conducive to second pond solid-liquid separation.Can also improve simultaneously non-degradable COD or
The clearance of TOC, particularly can effectively remove the colourity and stink of paper-making pulping waste water, reduce the foamed phenomenon of Aeration tank,
Improve the disposal ability of biochemical system.
And specifically, it is preferable to by 10% sludge reflux to physical absorption process step, 90% is back to biochemical treatment step.
In addition, according to a further aspect in the invention, a kind of wastewater treatment equipment is additionally provided, as shown in figure 1, the device bag
Include a coagulating basin 10, physical absorption pond 20, second coagulation pond 30, flocculation basin 40 and the sedimentation tank 50 being arranged in series.
In the device, a coagulating basin 10 is used to carry out waste water coagulating treatment；Physical absorption pond 20 is used for one
The first mixture that secondary coagulating treatment is obtained carries out physical absorption process；Second coagulation pond 30 is used for the obtained to physical absorption
Two mixture carry out second coagulation process；The 3rd mixture that flocculation basin 30 is used to obtain second coagulation carries out flocculation treatment；
The 4th mixture that sedimentation tank 50 is used to obtain flocculation treatment carries out solid-liquid separation, to be purified water.An above-mentioned coagulation
Pond 10, physical absorption pond 20, second coagulation pond 30, flocculation basin 40 and sedimentation tank 50 are joined directly together by pipeline, by upper one dress
Put and obtain product and be fed directly to next device being processed.
Above-mentioned processing meanss take full advantage of the advantage of each functional pool, waste water can be included into float, colloid, hydrophobic
All kinds of impurity such as contact scar thing, small molecule, hydrophilic, dissolved pollutant are fully removed.Meanwhile, physical absorption is processed and is placed in
After coagulating treatment, before second coagulation process and flocculation treatment, can be using coagulant hydrolysate and physical absorbent
Complexing, borrow the flco gradually grown up, can further improve the removal effect of Pollutants in Wastewater, and can be effective
Improve the effect of solid-liquid separation.Additionally, compared to the first coagulating sedimentation mode that again physical absorption is processed, the present invention is arranged such,
Without the need for building the process sections such as physical absorption filter tank again, adsorbent can be obtained by separating in the coagulating sedimentation stage, greatly save throwing
Money and occupation of land.In a word, using the method for wastewater treatment that the present invention is above-mentioned, the clean-up effect of waste water can be significantly improved, and is had
Inexpensive, easy-operating advantage. especially process after paper waste, the purified water of output meets the discharge mark of GB3544-2008
It is accurate.
In a preferred embodiment, wastewater treatment equipment also includes biochemistry pool, biochemistry pool and a coagulating basin 10
Connection, and biochemistry pool is located at the upstream of a coagulating basin 10.This sewage can first be carried out biochemical treatment, be conducive to further changing
Kind clean-up effect.
In a preferred embodiment, sedimentation tank 50 is inclined-plate clarifying basin.The sedimentation effect of such sedimentation tank is more preferably.
In a preferred embodiment, sedimentation tank 50 is provided with sludge outlet 501, and sludge outlet 501 is inhaled with physics
Attached pond 20 connects.So the sludge of part can be passed through in physical absorption pond and be reused.In view of sedimentation tank 50
Adsorbent containing unadsorbed saturation in sludge, therefore by the way that precipitating sludge is back to into front end, make residual pharmacy continue to play
Effect, defines high concentration coagulant adsorbent environment, not only contributes to the removal of pollutant, can also save a large amount of medicaments.
In a preferred embodiment, sludge outlet 501 is arranged on the bottom of sedimentation tank 50.So can directly by
The sludge being precipitated out is discharged.
In a preferred embodiment, wastewater treatment equipment also include mud discharging pipeline, mud discharging pipeline with
Pipeline connection between sludge outlet 501 and physical absorption pond 20.This partial sludge can also be passed directly into biochemistry pool and carry out profit
With.
In a preferred embodiment, sedimentation tank 50 is additionally provided with treated water outlet 502, and treated water outlet 502 sets
Put at the top of sedimentation tank 50.So, the top that purified water can be directly from sedimentation tank 50 overflows.
In a preferred embodiment, wastewater treatment equipment also includes：First stirring slurry 11, the first stirring slurry 11 sets
Put in a coagulating basin 10；Second stirring paddle 21, the second stirring paddle 21 is arranged in physical absorption pond 20；3rd stirring paddle
31, the 3rd stirring paddle 31 is arranged in second coagulation pond 30；And the 4th stirring paddle 41, the 4th stirring paddle 41 is arranged on flocculation basin
In 40.To improve the stability and efficiency of each pond purified treatment.
In addition, the purified water Jing after above-mentioned process is entered can arrange outward after sterilization pool process.
Beneficial effects of the present invention are further illustrated by the following examples：
Embodiment 1
The paper waste through biochemical treatment is processed in accordance with the following steps：
Primary coagulating basin：PAFCS dosage 1000mg/L, blender mixing speed be 280r/min, hydraulic detention time
For 3min.
Adsorption tank：Powdered Activated Carbon dosage 20mg/L, blender mixing speed is 280r/min, and hydraulic detention time is
20min。
Two-stage coagulation pond：PAC dosage 200mg/L, blender mixing speed 280r/min, hydraulic detention time is
3min。
Flocculation basin：PAM dosage 0.5mg/L, blender mixing speed 200r/min, hydraulic detention time is 6min.
Sedimentation tank：Upflow velocity span of control 15m/h.
Chemical sludge backflow allocative decision：10% is back to adsorption tank, and 90% is back to biological tank aeration zone front end.
Water outlet meets：CODCr≤50mg/L、BOD5≤10mg/L、SS≤10mg/L、NH3-N≤5mg/L、T-N≤10mg/
The requirement of L, T-P≤special emission limit of 0.5mg/L countries water pollution discharge standard pollutant.
Embodiment 2
The paper waste through biochemical treatment is processed in accordance with the following steps：
Primary coagulating basin：PAFCS dosage 300mg/L, blender mixing speed is 280r/min, and hydraulic detention time is
5min。
Adsorption tank：Powdered Activated Carbon dosage 100mg/L, blender mixing speed be 280r/min, hydraulic detention time
For 25min.
Two-stage coagulation pond：PAC dosage 100mg/L, blender mixing speed 280r/min, hydraulic detention time is
2min。
Flocculation basin：PAM dosage 1.5mg/L, blender mixing speed 200r/min, hydraulic detention time is 8min.
Sedimentation tank：Upflow velocity span of control 10m/h.
Chemical sludge backflow allocative decision：10% is back to adsorption tank, and 90% is back to biological tank aeration zone front end.
Water outlet meets：CODCr≤50mg/L、BOD5≤10mg/L、SS≤10mg/L、NH3-N≤5mg/L、T-N≤10mg/
The requirement of L, T-P≤special emission limit of 0.5mg/L countries water pollution discharge standard pollutant.
Embodiment 3
The paper waste through biochemical treatment is processed in accordance with the following steps：
Primary coagulating basin：PAFCS dosage 800mg/L, blender mixing speed is 250r/min, and hydraulic detention time is
2min。
Adsorption tank：Powdered Activated Carbon dosage 60mg/L, blender mixing speed is 250r/min, and hydraulic detention time is
15min。
Two-stage coagulation pond：PAC dosage 150mg/L, blender mixing speed 250r/min, hydraulic detention time is
5min。
Flocculation basin：PAM dosage 0.5mg/L, blender mixing speed 200r/min, hydraulic detention time is 4min.
Sedimentation tank：Upflow velocity span of control 12m/h.
Chemical sludge backflow allocative decision：10% is back to adsorption tank, and 90% is back to biological tank aeration zone front end.
Water outlet meets：CODCr≤50mg/L、BOD5≤10mg/L、SS≤10mg/L、NH3-N≤5mg/L、T-N≤10mg/
The requirement of L, T-P≤special emission limit of 0.5mg/L countries water pollution discharge standard pollutant.
Embodiment 4
The paper waste through biochemical treatment is processed in accordance with the following steps：
Primary coagulating basin：PAC dosage 800mg/L, blender mixing speed is 250r/min, and hydraulic detention time is
2min。
Adsorption tank：Bentonite dosage 60mg/L, blender mixing speed is 250r/min, and hydraulic detention time is
15min。
Two-stage coagulation pond：PFC dosage 150mg/L, blender mixing speed 250r/min, hydraulic detention time is
5min。
Flocculation basin：PAM dosage 0.5mg/L, blender mixing speed 200r/min, hydraulic detention time is 4min.
Sedimentation tank：Upflow velocity span of control 12m/h.
Chemical sludge backflow allocative decision：10% is back to adsorption tank, and 90% is back to biological tank aeration zone front end.
Water outlet meets：CODCr≤50mg/L、BOD5≤10mg/L、SS≤10mg/L、NH3-N≤5mg/L、T-N≤10mg/
The requirement of L, T-P≤special emission limit of 0.5mg/L countries water pollution discharge standard pollutant.
Embodiment 5
The paper waste through biochemical treatment is processed in accordance with the following steps：
Primary coagulating basin：PAC dosage 280mg/L, blender mixing speed is 250r/min, and hydraulic detention time is
2min。
Adsorption tank：Bentonite dosage 18mg/L, blender mixing speed is 250r/min, and hydraulic detention time is
15min。
Two-stage coagulation pond：PFC dosage 80mg/L, blender mixing speed 250r/min, hydraulic detention time is 5min.
Flocculation basin：PAM dosage 0.4mg/L, blender mixing speed 200r/min, hydraulic detention time is 4min.
Sedimentation tank：Upflow velocity span of control 15m/h.
Chemical sludge backflow allocative decision：10% is back to adsorption tank, and 90% is back to biological tank aeration zone front end.
Water outlet meets：CODCr≤50mg/L、BOD5≤10mg/L、SS≤10mg/L、NH3-N≤5mg/L、T-N≤10mg/
The requirement of L, T-P≤special emission limit of 0.5mg/L countries water pollution discharge standard pollutant.
Degree of purification comparative result in embodiment 1 to 5 is as follows：The degree of purification of the sewage in embodiment 1 to 3 is higher than real
The degree of purification of sewage in example 4 is applied, the degree of purification of the sewage in embodiment 4 is higher than the degree of purification of sewage in embodiment 5.
Comparative example 1
The paper waste through biochemical treatment is processed in accordance with the following steps：
Primary coagulating basin：PAC dosage 280mg/L, blender mixing speed is 250r/min, and hydraulic detention time is
2min。
Two-stage coagulation pond：PFC dosage 80mg/L, blender mixing speed 250r/min, hydraulic detention time is 5min.
Flocculation basin：PAM dosage 0.4mg/L, blender mixing speed 200r/min, hydraulic detention time is 4min.
Sedimentation tank：Upflow velocity span of control 15m/h.
Chemical sludge backflow allocative decision：10% is back to adsorption tank, and 90% is back to biological tank aeration zone front end.
Water outlet is unsatisfactory for：CODCr≤50mg/L、BOD5≤10mg/L、SS≤10mg/L、NH3-N≤5mg/L、T-N≤
The requirement of 10mg/L, T-P≤special emission limit of 0.5mg/L countries water pollution discharge standard pollutant.
From data above, carry out at sewage by the way of two-stage coagulation is in combination with physical absorption in the present invention
Reason, disclosure satisfy that the discharge standard of GB3544-2008.And the mode in comparative example only with second coagulation carries out sewage disposal,
The discharge standard of GB3544-2008 cannot be met.
Particularly, the degree of purification of the sewage in embodiment 1 to 3 shows profit higher than the degree of purification of sewage in embodiment 4
With PAFCS as the first coagulant, PAC as the second coagulant, activated carbon as physical absorbent when, it is net for sewage
Change more thorough.The degree of purification of the sewage in embodiment 4 shows the medicine for adopting higher than the degree of purification of sewage in embodiment 5
It is more thorough for dirty water purification when the dosage of agent is particular range.
In a word, the wastewater treatment mode effect specific as follows that the present invention is provided：
1st, NEW TYPE OF COMPOSITE ferro-aluminum inorganic polymer coagulant can be given full play to into the excellent of each medicament in combination with activated carbon
Gesture.PAFCS is to float, colloid, hydrophobic contaminant high treating effect but not high to hydrophilic small molecule clearance, former
Water, substantially without macromole and hydrophobic contaminant presence, greatly facilitates activated carbon to small molecule, hydrophilic after PAFCS process
Property, dissolved pollutant remove, the chemical adsorption of activated carbon is played to ultimate attainment, fully supplements the deficiency of PAFCS, and both
Mutually promoting most pollutant in paper waste of efficiently remove.
2nd, Powdered Activated Carbon and the mutual complexation of PAFCS hydrolyzate are added, is conducive to formation and the pollutant of coagulation alumen ustum
Removal, while increased flco weight containing Powdered Activated Carbon in flco so that sedimentation tank is maintained higher upper up-flow
Speed, not only sedimentation effect is good but also reduces precipitation pool volume, saves and takes up an area.
3rd, activated carbon adsorption section is arranged at before the flocculation basin of coagulating basin rear end, compared to the activated carbon adsorption again of first coagulating sedimentation
The mode of process, without the need for building the process sections such as activated carbon filter again, activated carbon can be obtained by separating in the coagulating sedimentation stage, significantly
Investment is saved and has taken up an area.
4th, novelty by adjusting clarifier sludge is partly refluxed to adsorption tank front end, forms high concentration adsorbent ring
Border, not only contributes to the removal of pollutant, can also save medicament.
5th, preferably, during the mud discharging containing big carbon content active that will be produced in advanced treatment process, by excess sludge
Being back to biochemical system biological tank front end can form PACT biological activated carbon methods, not only enhance biochemical treatment section and process effect
Really, improving contaminant removal efficiency improves sludge character, and takes full advantage of the surplus value of chemical sludge, saves medicine consumption.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (18)
1. a kind of method of wastewater treatment, it is characterised in that the treating method comprises following steps：
Coagulating treatment is carried out to the waste water using the first coagulant, the first mixture is obtained；
Physical absorption process is carried out to first mixture using physical absorbent, the second mixture is obtained；
Second coagulation process is carried out to second mixture using the second coagulant, the 3rd mixture is obtained；
Flocculation treatment is carried out to the 3rd mixture using flocculant, the 4th mixture is obtained；And
Solid-liquid separation is carried out to the 4th mixture, water is purified.
2. processing method according to claim 1, it is characterised in that first coagulant and second coagulant are each
From the one kind in polyaluminium aluminium iron sulfate coagulant, aluminium polychlorid coagulant and poly-ferric chloride coagulant
Or it is various.
3. processing method according to claim 2, it is characterised in that first coagulant is polyaluminium aluminium iron sulfate
Coagulant, second coagulant is aluminium polychlorid coagulant.
4. processing method according to claim 1, it is characterised in that the physical absorbent be activated carbon, activated coke and
One or more in bentonite.
5. processing method according to claim 1, it is characterised in that the flocculant is PAM flocculant.
6. processing method according to any one of claim 1 to 5, it is characterised in that first coagulant is added
Measure as 300~1000mg/L, preferably the dosage of second coagulant is 100~200mg/L, preferably the physical absorbent
Dosage be 20~100mg/L, preferably the dosage of the flocculant is 0.5~1.5mg/L.
7. processing method according to claim 6, it is characterised in that
In the step of coagulating treatment, hydraulic detention time is 2~5min；
It is preferred that in the step of physical absorption is processed, hydraulic detention time is 15~25min；
It is preferred that in the step of second coagulation is processed, hydraulic detention time is 2~5min；
It is preferred that in the step of flocculation treatment, hydraulic detention time is 4~8min.
8. processing method according to claim 7, it is characterised in that heavy using swash plate in the step of the solid-liquid separation
The mode in shallow lake carries out the solid-liquid separation；It is preferred that during the solid-liquid separation, upflow velocity is 10~15m/h.
9. processing method according to any one of claim 1 to 5, it is characterised in that in the step of the solid-liquid separation,
Obtain sludge simultaneously；The processing method is further comprising the steps of：The part sludge is back in first mixture
Carry out the physical absorption process.
10. processing method according to any one of claim 1 to 5, it is characterised in that carrying out a coagulation
Before step, also include the step of biochemical treatment is carried out to the waste water.
11. a kind of wastewater treatment equipments, it is characterised in that including coagulating basin (10), a physical absorption being sequentially connected in series setting
Pond (20), second coagulation pond (30), flocculation basin (40) and sedimentation tank (50).
12. wastewater treatment equipments according to claim 11, it is characterised in that the wastewater treatment equipment also includes biochemistry
Pond, the biochemistry pool is connected with a coagulating basin (10), and the biochemistry pool is located at the upper of a coagulating basin (10)
Trip.
13. wastewater treatment equipments according to claim 11, it is characterised in that the sedimentation tank (50) is sloping plate deposition
Pond.
14. wastewater treatment equipments according to any one of claim 11 to 13, it is characterised in that the sedimentation tank (50)
Sludge outlet (501) is provided with, the sludge outlet (501) connects with the physical absorption pond (20).
15. wastewater treatment equipments according to claim 14, it is characterised in that the sludge outlet (501) is arranged on institute
State the bottom of sedimentation tank (50).
16. wastewater treatment equipments according to claim 14, it is characterised in that the wastewater treatment equipment also includes sludge
Discharge pipe line, the pipeline between the mud discharging pipeline and the sludge outlet (501) and the physical absorption pond (20) connects
It is logical.
17. wastewater treatment equipments according to claim 14, it is characterised in that the sedimentation tank (50) is additionally provided with purification
Water out (502), the treated water outlet (502) is arranged on the top of the sedimentation tank (50).
18. wastewater treatment equipments according to any one of claim 11 to 13, it is characterised in that the wastewater treatment dress
Putting also includes：
First stirring slurry (11), first stirring slurry (11) is arranged in a coagulating basin (10)；
Second stirring paddle (21), second stirring paddle (21) is arranged in the physical absorption pond (20)；
3rd stirring paddle (31), the 3rd stirring paddle (31) is arranged in the second coagulation pond (30)；And
4th stirring paddle (41), the 4th stirring paddle (41) is arranged in the flocculation basin (40).
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| CN109928476A (en) * | 2019-04-26 | 2019-06-25 | 中创水务科技环保(广东)有限公司 | A kind of landfill leachate pretreatment system and its technique |
| CN114105356A (en) * | 2021-11-18 | 2022-03-01 | 中国轻工业长沙工程有限公司 | Deep treatment process for papermaking by using waste paper |
| CN115043545A (en) * | 2022-07-15 | 2022-09-13 | 南开大学 | Magnetic flocculation coupling photocatalysis water purification method and magnetic flocculation coupling photocatalysis water purification device |
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