CN106745931A - A kind of processing method and system of oil-bearing graphite waste water - Google Patents
A kind of processing method and system of oil-bearing graphite waste water Download PDFInfo
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- CN106745931A CN106745931A CN201510810181.9A CN201510810181A CN106745931A CN 106745931 A CN106745931 A CN 106745931A CN 201510810181 A CN201510810181 A CN 201510810181A CN 106745931 A CN106745931 A CN 106745931A
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Abstract
The present invention relates to a kind of processing method of oil-bearing graphite waste water, using oil, suspended material in coagulating sedimentation and adsorption combined technology treatment oil-bearing graphite waste water.First to adding coagulant in the reaction tank equipped with waste water, 1~2min is stirred under the rotating speed of 120~200r/min, make that waste water and coagulant are quick, be sufficiently mixed, add flocculant, 2~4min of low rate mixing under the rotating speed of 40~80r/min, staticly settle 20~50 minutes, precipitate the oils in waste water, suspension;Supernatant flow in reaction tank is pumped into one-level and inhales the attached tower bottom of coke powder, flowed out from top after being processed through coke powder adsorption, two grades of coke powder adsorption tower bottoms are directly sent into by the road, discharged from top overflow after being processed through coke powder, further remove oil emulsion, the suspension not settled in waste water, waste water is 1~2 hour with the absorption time of contact of coke powder, and discharge clear water flows into clear water reserviors.1mg/L is respectively less than through oil content in the waste water that the method is processed and suspension content, and investment and operating cost are relatively adapted to the application of Practical Project.
Description
Technical field
The present invention relates to water-treatment technology field, the more particularly to a kind of processing method and system of oil-bearing graphite waste water.
Background technology
Water pollution is one of main Environmental Problems that China currently faces, and the governing problem of oily waste water is always puzzlement enterprise
Problem.Technology and it is economical due to, oily waste water is difficult to fully achieve qualified discharge always.Greasy dirt is pollution first
Water body, deteriorates water quality, has a strong impact on the use value of water resource, makes water body animals and plants that deformity to occur and even becomes extinct;Next to that
Pollution air, the oils of part and its analyte enter air under effect of natural environment, pollute and poison water body overhead and
The atmospheric environment of surrounding.These pollutions finally endanger the living space of mankind itself by food chain, biosphere.Therefore, contain
The governing problem of oily waste water is increasingly paid attention to.
, it is necessary to add high temperature aqueous-based core rod lubricant agent to be produced for seamless pipe poling in Seamless Tube Plant hot rolling seamless steel pipe production process
Lubrication, its main component aquadag mixes with shower water in milling train cooling and enters circulation, causes recirculated water to hang
Float content overproof;In cooling procedure is rolled cooling water can also under band a certain amount of lubricating oil, hydraulic oil, in high-temperature water
The effect such as sodium tripolyphosphate, sodium lignin sulfonate, dispersant, anti-settling agent is emulsified in base core rod lubricant agent, is formed more steady
Fixed oil-bearing graphite waste water, is difficult to remove using common horizontal sedimentation tank;Meanwhile, iron oxide is rinsed in the operation of rolling
The materials such as skin, dust, in system operation, can form greasy filth in water, if the recirculated water not to graphitiferous, oil enters
Row effectively treatment, greasy filth etc. can block chilling spray head, and dirt is formed in water wall, seriously reduce cooling effect, influence cold
But the normal of system is used, so as to influence normal production.So, to the treatment of oil-bearing graphite rolling effluent, separate graphite, oil
Fat and metal oxide are the keys of its handling process.
Because oily waste water is big to environmental hazard, many administering methods are developed for many years, but because the species of greasy dirt is more,
The property of pollution source is complicated, and discharge capacity is big, and processing requirement is high, and huge difficulty and pressure is brought to the improvement of oily waste water.
Conventional processing method is divided into Physical, chemical method and bioanalysis at present.Physical is to process oils using physical action, such as
The precipitation method, Bubble-floating Method, filtration method, embrane method etc.;Chemical method processes the oil emulsion in waste water, such as coagulation by the effect being demulsified
The precipitation method, acidization etc.;Bioanalysis is to be removed the micelle shape oil droplet in waste water and dissolved oil using the effect of microorganism, such as
Activated sludge process, biomembrance process, anaerobic bio-treated etc..In actual treatment oily waste water, should be according to handled system
The characteristics of feature and processing method and applicable elements select suitable method.
1st, the U of patent CN 202164193 are disclosed " a kind of printing ink wastewater treatment system ".The patent by printing ink wastewater successively
By acidification reaction pond, air supporting and purified treatment pond.By acidification reaction pond and the synergy of air-floating apparatus, effectively remove
Ink in removal ink waste water, reduces the COD in waste water.Wherein, acidification reaction pond can effectively by the ink in waste water from
Separated out in waste water, air supporting removes impurity to a large amount of micro air bubbles are discharged in waste water by buoyancy.This patent is to emulsification oils treatment
Effect is limited, and air supporting is using equipment is more, easy break-down.
2nd, the U of patent CN 202576032 are disclosed " oily waste water adsorption treatment and indirect regeneration ".The patented invention
A kind of oily waste water adsorption treatment and indirect regeneration.Waste water carries out oil suction by the adsorption filtration tower equipped with polymeric adsorbent
Treatment, after polymeric adsorbent saturation, the regeneration of polymeric adsorbent is carried out using regenerated liquid, and 70 are heated to using the regenerated liquid of alkalescence
Degrees centigrade, makes regenerated liquid be reacted with grease, 40 degrees centigrades is cooled to afterwards, at the aeration of activated sludge
Reason, effectively removes the lubricant component in regenerated liquid.Adsorption stuffing regeneration is difficult and process is complicated in the method, and processing cost is high,
Course of reaction conditional is difficult to control.
3rd, the A of patent CN 102718285 are disclosed " a kind of oil-contaminated water of oil field physics breaking method ".The patent is a kind of
Oil-contaminated water of oil field physics breaking method.Oil-polluted water is specially first passed through into Venturi tube, containing for venturi throat is controlled
Greasy dirt water pressure is less than the saturated vapor pressure of water, then adsorbs free state oil molecule using lipophilic material, oil molecule is assembled shape
Removed after into oil droplet.The method energy consumption is low, floor space is small, it also requires first aeration pretreatment, needs adsorbent after demulsification
Absorption, complex operation, operating cost is high.
4th, the A of patent CN 103265093 are disclosed " a kind of deoiling method of oil-containing solutions ".Patented invention one kind contains
The deoiling method of oil solution.Liquid before the oil removing of oil-containing is feathered except oil column by filling, make the oil before oil removing in liquid by plumage
Hair absorption, to reduce the oil content after the oil removing obtained after oil removing in liquid, when the adsorbance of feather reaches saturation state, stops
Only feed, feather is carried out to scrap treatment.The method equipment is simple, it is easy to operate, but treating capacity is limited, and needs one
Determine to be carried out under acidity condition, and oil-containing feather cannot be disposed effectively, cause secondary pollution.
5th, the A of patent CN 102060350 are disclosed " a kind of oily waste water advanced treatment process method ".The patent is by adsorbing
Constituted with regeneration two systems:Adsorption system is made up of a series of adsorption tower group that multicolumns for realizing parallel running are connected, alternately
Carry out advanced treating to low concentration 30~50mg/L oil-containings water outlet of traditional handicraft, adsorbent be modified coal ash, activated carbon,
The sorbing materials such as expanded graphite;After this group of adsorption tower adsorption saturation, this group of adsorption tower is switched into bioregenerative system is carried out
In-situ regeneration.The method adsorption effect stabilization, high treating effect, but the microbial activity of regenerative process is unstable, during absorption
Between it is more long.
6th, the U of patent CN 202729850 are disclosed " one kind cinder adsorption oily waste water device ".The patent is with inventing
A kind of device of use cinder adsorption oily waste water.Cinder is paved into cinder layer using drive device, oily waste water is inhaled from cinder
Cinder layer is from bottom to top flowed into attached pond, the oil contaminants of oily waste water is effectively adsorbed by cinder, cinder can be by mucking machine
Structure falls drag-out slag car feeding boiler combustion automatically;The oily waste water supernatant water adsorbed by cinder layer flows into overflow groove, then passes through
Precipitation discharge.The method simple structure, easy to operate, operating cost is low, but adsorption effect is undesirable, it is necessary to successive depths
Treatment.
7、《Industrial water and waste water》Disclose " a kind of design of combined oil removing equipment ", author Zou Zhifang, Luo Kuiyuan,
Nie Yanqiu, 2005,36 (2):69-71.This article devises a kind of combined oil removing equipment using integrated approach, and it is comprehensive
The characteristics of vertical baffle point oil process, honeycomb inclined-tube point oil process, magnetic grain media method, combine waste oil circular treatment.
Operation result shows that the content of water outlet oil is less than 1mg/L, and treatment effect is good.But the occupation area of equipment is big, operation is multiple
Miscellaneous, operating cost is high.
8、《Water technology》Disclose " absorption-filtering technique treatment hot rolling turbid circulating water oil removing experimental study ", author
Xiao Zuoyi, Yan Jining, Wang Zhenjiang, Du Jing, 2010,36 (4):115-117.Related articles are directed to Baogang's sheet-steel rolling mill's hot rolling
The water quality characteristic of oily waste water, has carried out the employment and suitability test (E & ST) of adsorption filtration combined treatment technology.Using slag absorption, haydite
During filtrate treatment, water outlet oil content is 1.8~3.5mgL-1(average 2.25mgL-1), suspension (SS) quality is dense
1.8~5.5mgL of degree-1(average 3.07mgL-1).The method is only capable of processing the relatively low waste water of oil content, and water outlet
PH value is high, it is necessary to carry out pH regulations to water with acid.
9、《Chemical industry environmental protection》Disclose " experimental study of oily waste water breaking milk and removing oil and commercial Application ", author Shen Zhigang is old
Ying Rui, 2000,20 (3):31-33.Related articles have carried out treatment experiment to 3 kinds of oily waste waters, demonstrate demulsifier
Effect of demulsification and oil removal, filters out the demulsification medicament of best results and has carried out commercial Application, and oil removal rate is up to 90% or so.Should
Method is applied to original " oil removal-flotation-aeration and sedimentation " PROCESS FOR TREATMENT effect situation not up to standard, complex process.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of processing method and system of oil-bearing graphite waste water.This kind of technique can
Effectively to remove the oils and suspension in oil-bearing graphite waste water, while as the coke powder of coke-oven plant's waste after adsorption saturation
SINTERING PRODUCTION can be directly used in without regeneration, system operation cost is significantly reduced.Oil content and outstanding in processed waste water
Float content is below 1mg/L, meets《GB50050-2007 Code for design of industrial recirculating cooling water treatment》And
《GB13456-2012 steel and iron industry pollution discharge standards》In to suspension and the emission request of petroleum-type.
To achieve the above object, the present invention is realized using following technical scheme:
A kind of processing method of oil-bearing graphite waste water, using in coagulating sedimentation and adsorption combined technology treatment oil-bearing graphite waste water
Oil, suspended material, specifically include following steps:
A) first to 30~50mg/L coagulant is added in the reaction tank equipped with waste water, described coagulant is alum, chlorination
Calcium, activated silicic acid, are 1~3 in mass ratio:2~5:1~2 (preferably 2:3:1), turning in 120~200r/min
Speed 1~2min of lower stirring, make waste water with coagulant quickly, be sufficiently mixed, add the flocculant of 0.1~0.2mg/L,
Described flocculant is cationic-type polyacrylamide, poly dimethyl diene ammonium chloride, is in mass ratio 1~3:1 (preferably 2:
1), 2~4min of low rate mixing under the rotating speed of 40~80r/min, staticly settles 20~50 minutes, makes the oil in waste water
Class, suspension precipitation;
B supernatant flow in reaction tank) is pumped into one-level and inhales the attached tower bottom of coke powder, from top after being processed through coke powder adsorption
Outflow, directly sends into two grades of coke powder adsorption tower bottoms by the road, is discharged from top overflow after being processed through coke powder, further removes
Oil emulsion, the suspension not settled in waste water, waste water are 1~2 hour with the absorption time of contact of coke powder, discharge clear water stream
Enter clear water reserviors.
A kind of processing system of oil-bearing graphite waste water, including reaction tank, dosing pump, flow pump, one-level coke powder adsorption tower, two
Level coke powder adsorption tower and clear water reserviors;Dosing pump is located at and electric mixing device, stirring bar is set in the top of reaction tank, reaction tank
Below the liquid level of reaction tank middle position, under the drinking-water pipe intercalation reaction pond liquid level of flow pump, the outlet pipe connection of flow pump
One-level coke powder adsorption tower bottom water inlet, one-level coke powder adsorption top of tower delivery port connects two grades of coke powder adsorption tower bottom water inlets
Mouthful, two grades of coke powder adsorption top of tower delivery ports connect clear water reserviors.
The dosing pump is the adding apparatus of coagulant and flocculant.
Described one-level coke powder adsorption tower and two grades of coke powder adsorption tower inside are equipped with the dry quenched coke that particle diameter is 0.83~1.65mm
Powder.
Compared with prior art, the beneficial effects of the invention are as follows:
The invention provides a kind of method that coagulating sedimentation and adsorption combined technology process oil-bearing graphite waste water.The oil-containing of Seamless Tube Plant
Graphite waste water is by after present invention treatment, oil content and suspension content are respectively less than 1mg/L in waste water, meet
《GB50050-2007 Code for design of industrial recirculating cooling water treatment》And《GB13456-2012 steel and iron industries water pollutant is arranged
Put standard》In to suspension and the emission request of petroleum-type.Because present invention process can process water and pollutant load ripple
Dynamic oil-bearing graphite waste water, and investment and operating cost are relatively adapted to the application of Practical Project, coke powder cocoa is not after adsorption saturation
SINTERING PRODUCTION is directly used in through regeneration, non-secondary pollution reaches the purpose of the treatment of wastes with processes of wastes against one another.Solve steel industry production in
The a great problem of Seamless Tube Plant oil-bearing graphite wastewater treatment, the sustainable development for enterprise has important practical significance.
Brief description of the drawings
Fig. 1 is the processing system structural representation of oil-bearing graphite waste water.
In figure:1- dosing pumps, 2- electric mixing devices, 3- reaction tanks, 4- flow pumps, 5- one-level coke powder adsorption towers, 6- bis-
Level coke powder adsorption tower, 7- clear water reserviors
Specific embodiment
Specific embodiment of the invention is further illustrated below in conjunction with the accompanying drawings:
As shown in figure 1, a kind of processing method of oil-bearing graphite waste water, including dosing pump 1, electric mixing device 2, reaction
Pond 3, flow pump 4, one-level coke powder adsorption tower 5, two grades of coke powder adsorption towers 6, clear water reserviors 7.Wherein dosing pump 1 is located at anti-
The top in pond 3 is answered, is the adding apparatus of coagulant and flocculant;Electric mixing device 2 drives stirring rod to be rotated, and stirs
Rod is mixed to be placed in below the middle position liquid level of reaction tank 1, and rotating speed can be adjusted, and enable to reaction tank internal liquid fully to mix
Close;Flow pump 4 is the conveying device of waste water, under the drinking-water pipe intercalation reaction pond liquid level of flow pump, can will set flow
Liquid is transported to one-level, two grades of coke powder adsorption towers 5,6;One-level, two grades of coke powder adsorption towers for it is internal equipped with particle diameter be 0.83~
The device of the dry coke quenching coke powder of 1.65mm, from bottom to top by the coke powder in adsorption tower, the pollutant in water is effectively blocked current
Cut, the clear water after filtering is discharged to clear water reserviors 7 by adsorption tower top.
Embodiment 1
A kind of processing method of oil-bearing graphite waste water is as follows:
A. oil content is 149mg/L, the oil-bearing graphite waste water that total suspended matter is 589mg/L is injected in reaction tank 3,
By the coagulant of the addition of dosing pump 1 50mg/L, (alum, calcium chloride, activated silicic acid mass ratio are 3:4:2), in electricity
Dynamic agitating device 2 stirring 1min under the rotating speed of 200r/min, make waste water with coagulant quickly, be sufficiently mixed, then lead to
Cross flocculant (cationic-type polyacrylamide, poly dimethyl diene ammonium chloride mass ratio 3 that dosing pump 1 adds 0.1mg/L:
1), the low rate mixing 2min under the rotating speed of 80r/min, staticly settles 20 minutes.
B. the supernatant flow pump 4 after precipitation is sent into the bottom of one-level coke powder adsorption tower 5, is processed through coke powder adsorption and exchange
Afterwards from top flow out, directly by the road send into two grades of bottoms of coke powder adsorption tower 6, adsorption tower a diameter of 80mm, height 500mm,
Waste water is 1.5 hours with the absorption time of contact of adsorbent, and clear water reserviors 7 are discharged to from top overflow after treatment.
Embodiment 2
Oil content is 149mg/L, the oil-bearing graphite waste water that total suspended matter is 589mg/L is injected in reaction tank, added
(alum, calcium chloride, activated silicic acid mass ratio are 2 to the coagulant of 40mg/L:4:2), under the rotating speed of 160r/min
Stirring 1.5min, make waste water and coagulant quickly, be sufficiently mixed, add the flocculant (cationic poly of 0.2mg/L
Acrylamide, poly dimethyl diene ammonium chloride mass ratio 3:1), the low rate mixing 3min under the rotating speed of 60r/min, quiet
Put precipitation 30 minutes.
Supernatant flow after precipitation is pumped into one-level coke powder adsorption tower bottom, from top after being processed through coke powder adsorption and exchange
Portion is flowed out, and two grades of coke powder adsorption tower bottoms are directly sent into by the road, makes waste water be 1.5 with the absorption time of contact of adsorbent
Hour, from top, overflow is discharged to clear water reserviors after treatment.
Embodiment 3
Oil content is 149mg/L, the oil-bearing graphite waste water that total suspended matter is 589mg/L is injected in reaction tank, added
(alum, calcium chloride, activated silicic acid mass ratio are 3 to the coagulant of 50mg/L:5:1), under the rotating speed of 140r/min
Stirring 2min, make waste water and coagulant quickly, be sufficiently mixed, add the flocculant (cationic poly third of 0.1mg/L
Acrylamide, poly dimethyl diene ammonium chloride mass ratio 3:1), the low rate mixing 4min under the rotating speed of 40r/min, stands
Precipitation 40 minutes.
Supernatant flow after precipitation is pumped into one-level coke powder adsorption tower bottom, from top after being processed through coke powder adsorption and exchange
Portion is flowed out, and two grades of coke powder adsorption tower bottoms are directly sent into by the road, makes waste water be 1 small with the absorption time of contact of adsorbent
When, from top, overflow is discharged to clear water reserviors after treatment.
Embodiment 4
Oil content is 149mg/L, the oil-bearing graphite waste water that total suspended matter is 589mg/L is injected in reaction tank, added
(alum, calcium chloride, activated silicic acid mass ratio are 2 to the coagulant of 30mg/L:3:1), under the rotating speed of 120r/min
Stirring 2min, make waste water and coagulant quickly, be sufficiently mixed, add the flocculant (cationic poly third of 0.2mg/L
Acrylamide, poly dimethyl diene ammonium chloride mass ratio 2:1), the low rate mixing 3min under the rotating speed of 60r/min, stands
Precipitation 50 minutes.
Supernatant flow after precipitation is pumped into one-level coke powder adsorption tower bottom, from top after being processed through coke powder adsorption and exchange
Portion is flowed out, and two grades of coke powder adsorption tower bottoms are directly sent into by the road, makes waste water be 2 small with the absorption time of contact of adsorbent
When, from top, overflow is discharged to clear water reserviors after treatment.
Embodiment 5
Oil content is 149mg/L, the oil-bearing graphite waste water that total suspended matter is 589mg/L is injected in reaction tank, added
(alum, calcium chloride, activated silicic acid mass ratio are 2 to the coagulant of 50mg/L:3:1), under the rotating speed of 200r/min
Stirring 1min, make waste water and coagulant quickly, be sufficiently mixed, add the flocculant (cationic poly third of 0.2mg/L
Acrylamide, poly dimethyl diene ammonium chloride mass ratio 2:1), the low rate mixing 3min under the rotating speed of 60r/min, stands
Precipitation 30 minutes.
Supernatant flow after precipitation is pumped into one-level coke powder adsorption tower bottom, from top after being processed through coke powder adsorption and exchange
Portion is flowed out, and two grades of coke powder adsorption tower bottoms are directly sent into by the road, makes waste water be 2 small with the absorption time of contact of adsorbent
When, from top, overflow is discharged to clear water reserviors after treatment.
Said determination result as shown in table 1, as a result shows that the method can effectively remove the oils and suspension in waste water,
Clearance reaches more than 98%, reaches《GB50050-2007 Code for design of industrial recirculating cooling water treatment》And
《GB13456-2012 steel and iron industry pollution discharge standards》Emission request.
Each embodiment of table 1 is to oils and the removal effect of suspension
Described above is only general principle of the invention, and not the present invention is imposed any restrictions, every it is entered according to the present invention
Row equivalent variations and modification, within the category of the art of this patent protection scheme.
Claims (4)
1. a kind of processing method of oil-bearing graphite waste water, it is characterised in that processed using coagulating sedimentation and adsorption combined technology
Oil, suspended material in oil-bearing graphite waste water, specifically include following steps:
A) first to 30~50mg/L coagulant is added in the reaction tank equipped with waste water, described coagulant is alum, chlorination
Calcium, activated silicic acid, are 1~3 in mass ratio:2~5:1~2,1~2min is stirred under the rotating speed of 120~200r/min,
Make that waste water and coagulant are quick, be sufficiently mixed, add the flocculant of 0.1~0.2mg/L, described flocculant for sun from
Subtype polyacrylamide, poly dimethyl diene ammonium chloride, are 1~3 in mass ratio:1, under the rotating speed of 40~80r/min
2~4min of low rate mixing, staticly settles 20~50 minutes, precipitates the oils in waste water, suspension;
B supernatant flow in reaction tank) is pumped into one-level and inhales the attached tower bottom of coke powder, from top after being processed through coke powder adsorption
Outflow, directly sends into two grades of coke powder adsorption tower bottoms by the road, is discharged from top overflow after being processed through coke powder, further removes
Oil emulsion, the suspension not settled in waste water, waste water are 1~2 hour with the absorption time of contact of coke powder, discharge clear water stream
Enter clear water reserviors.
2. a kind of processing system of oil-bearing graphite waste water, it is characterised in that including reaction tank, dosing pump, flow pump,
Level coke powder adsorption tower, two grades of coke powder adsorption towers and clear water reserviors;Dosing pump is located in the top of reaction tank, reaction tank and sets electronic
Agitating device, stirring bar is located at below the liquid level of reaction tank middle position, under the drinking-water pipe intercalation reaction pond liquid level of flow pump, stream
The outlet pipe connection one-level coke powder adsorption tower bottom water inlet of pump is measured, one-level coke powder adsorption top of tower delivery port connects two grades of coke powders
Absorption tower bottom water inlet, two grades of coke powder adsorption top of tower delivery ports connect clear water reserviors.
3. a kind of processing system of oil-bearing graphite waste water according to claim 1, it is characterised in that the dosing pump
It is the adding apparatus of coagulant and flocculant.
4. a kind of processing system of oil-bearing graphite waste water according to claim 1, it is characterised in that described one-level
Coke powder adsorption tower and two grades of coke powder adsorption tower inside are equipped with the dry coke quenching coke powder that particle diameter is 0.83~1.65mm.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108008106A (en) * | 2017-12-27 | 2018-05-08 | 河南宜测科技有限公司 | A kind of industrial wastewater detection device and its operating method |
CN110759496A (en) * | 2018-07-26 | 2020-02-07 | 宝山钢铁股份有限公司 | Method and system for removing total hardness and COD (chemical oxygen demand) in cation resin regeneration waste liquid |
CN109019820B (en) * | 2017-06-12 | 2021-07-20 | 鞍钢股份有限公司 | Method for treating oil-containing graphite wastewater |
CN113754115A (en) * | 2021-09-09 | 2021-12-07 | 深圳瑞赛环保科技有限公司 | Catalytic filler for PCB (printed Circuit Board) ink wastewater pretreatment, preparation method and treatment method and equipment |
-
2015
- 2015-11-19 CN CN201510810181.9A patent/CN106745931A/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109019820B (en) * | 2017-06-12 | 2021-07-20 | 鞍钢股份有限公司 | Method for treating oil-containing graphite wastewater |
CN108008106A (en) * | 2017-12-27 | 2018-05-08 | 河南宜测科技有限公司 | A kind of industrial wastewater detection device and its operating method |
CN110759496A (en) * | 2018-07-26 | 2020-02-07 | 宝山钢铁股份有限公司 | Method and system for removing total hardness and COD (chemical oxygen demand) in cation resin regeneration waste liquid |
CN113754115A (en) * | 2021-09-09 | 2021-12-07 | 深圳瑞赛环保科技有限公司 | Catalytic filler for PCB (printed Circuit Board) ink wastewater pretreatment, preparation method and treatment method and equipment |
CN113754115B (en) * | 2021-09-09 | 2024-01-23 | 深圳瑞赛环保科技有限公司 | PCB (printed circuit board) ink wastewater pretreatment catalytic filler, preparation method and treatment method and equipment |
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Application publication date: 20170531 |