CN104961275A - Arsenic removing water purification treatment method - Google Patents
Arsenic removing water purification treatment method Download PDFInfo
- Publication number
- CN104961275A CN104961275A CN201510375882.4A CN201510375882A CN104961275A CN 104961275 A CN104961275 A CN 104961275A CN 201510375882 A CN201510375882 A CN 201510375882A CN 104961275 A CN104961275 A CN 104961275A
- Authority
- CN
- China
- Prior art keywords
- arsenic
- water
- arsenic removal
- treating method
- purifying treating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses an arsenic removing water purification treatment method and belongs to the technical field of water purification treatment. Arsenic in water exists in two main valence states including tervalence (arsenite ions) and pentavalence (arsenate ions), wherein the pentavalent arsenic can be removed by an iron salt flocculating agent, but the tervalent arsenic cannot be removed by the iron salt flocculating agent. According to the process, potassium hypermanganate is used for pre-oxidizing, and the iron salt flocculating agent and an auxiliary flocculating agent are added together; the arsenic in raw water is removed by a coagulant sedimentation method; finally, tiny floc, which is not settled and is adsorbed by the flocculating agents, is further intercepted by quartz sand filtering or an immersing type ultrafiltration membrane, so that the content of the arsenic in the output water reaches 0.1 microgram per liter.
Description
Technical field
The present invention relates to clean water treatment technical field, particularly a kind of water purifying treating method former water of low-temperature and low turbidity being carried out to arsenic removal.
Background technology
Arsenic pollutes and is mainly divided into natural origin and artificial two kinds, source; Natural origin refers to the weathering containing arsenic rock ore deposit and soil, and containing the drip washing of arsenic minerals, the transition of geology and the dissolving etc. of underground rock mineral enter in natural water; Artificial source refers to the use containing arsenic agricultural chemicals, the exploitation of arsenide and smelting, the pollution of trade effluent to the natural water body above-mentioned arsenic pollution source severe contaminations such as process hides, weaving, wood working, glass, paint pigment and pottery underground water and earth's surface drinking water source, cause Arsenic in Drinking Water content overproof serious, add that Drinking Water in China auxiliary facility of being correlated with is relatively backward, cause people's long-term drinking height arsenic water of some rural areas and remote districts, again and again endemic arsenic poisoning event occurs.
The crowd drinking high arsenic water can produce various toxicity symptom, comprise acute, subacute and chronic three kinds of forms, acute poisoning only has several minutes to a few hours latent period, the arsenicalism that long-term exposure causes in low dosage containing arsenic tap water is also more common, arsenicalism can cause the diseases such as various cancer, myocardial atrophy, diabetes, hypertension, coronary heart disease, human immune system's weakening, domestic Investigation on Data shows, long-term drinking arsenic concentration is in the crowd of 0.6mg/L water, and arseniasis morbidity is up to 47.2%; In the crowd of long-term drinking arsenic concentration 0.3 ~ 0.6mg/L water, arseniasis morbidity reaches 28.3%; Long-term drinking arsenic concentration is in the crowd of 0.1 ~ 0.3mg/L water, and arseniasis morbidity reaches 21.7%; Long-term drinking arsenic concentration is in the crowd of below 0.1mg/L water, and arseniasis morbidity reaches 15.9%; In arsenicalism patient, canceration rate is up to 15%, and therefore, the Removal of Arsenic in Drinking Water technology of research efficient economy safety seems and is even more important
Removal of Arsenic in Drinking Water technology has a lot, and at present according to pertinent literature report, mainly containing that development is comparatively ripe is following several: coagulation/precipitator method, absorption method, ion exchange method, membrane technique and biotechnology.But the high and clearance of arsenic removal water purifying treating method cost of the prior art still has much room for improvement.
Summary of the invention
In order to make up above deficiency, the invention provides the arsenic removal water purifying treating method that a kind of cost is low, clearance is high.
Technical scheme of the present invention is:
A kind of arsenic removal water purifying treating method, is characterized in that, comprise step:
1) oxygenant is added in the line mixer installed on raw water pipeline, and Homogeneous phase mixing;
2) in described line mixer, Ferric Salt Flocculants is added and Homogeneous phase mixing;
3) fully react in Cemented filling to flocculation basin after mixing, form alumen ustum; Coagulant aids is added in described flocculation basin;
4) after step 3) is fully reacted, the water in described flocculation basin and alumen ustum through distribution reservoir uniformly distributing to settling tank;
5) clear water on described settling tank top is collected by water leg;
6) filtration step 5) clear water collected, to remove small flco, complete arsenic removal clean water treatment.
Preferably, in step 1), described oxygenant is potassium permanganate.The present invention uses Ferric Salt Flocculants can only remove pentavalent arsenic ion, and can not remove trivalent arsenic ion, must be pentavalent arsenic ion trivalent arsenic ionic oxide formation, could remove the arsonium ion in water completely.Potassium permanganate oxidation ability is strong, can quick and complete oxidation trivalent arsenic ion.
Preferably, step 2) in, described Ferric Salt Flocculants is polymeric ferric sulfate flocculant.Empirical tests, employing Ferric Salt Flocculants removes the arsonium ion in former water, and removal effect is good, and bodied ferric sulfate as flocculation agent time, the input amount of flocculation agent is minimum, flocculation reaction shortest time and produce alumen ustum large, be easy to precipitation process in settling tank, low to precipitation burden requirement.
Preferably, the dosage of described Ferric Salt Flocculants is 8-12 mg/L.Ferric Salt Flocculants dosage is 8-12 mg/L and enough arsenic removal process, adding less, reduces costs.
Preferably, in step 3), described coagulant aids is polyacrylamide.
Preferably, the dosage of described coagulant aids is 1-2 mg/L.Add the formation that coagulant aids can increase flco fast.
Preferably, in step 3), the flocculation reaction time is 35-40 min.When using molysite flocculation arsenic removal, flocculation reaction speed is fast, and the alumen ustum produced is comparatively large, is easy to later stage precipitation process.
Preferably, in step 4), described settling tank is tube settler.
Preferably, in step 4), the precipitation load of described settling tank is 3-5 m
3/ (m
2h).Within the scope of this, the effect of thorough arsenic removal can be reached.
Preferably, in step 5), quartz sand filter media or submerged ultrafiltration is adopted to filter.
There are trivalent (arsenite ion) and pentavalent (arsenate ion) two kinds of main valence states in the arsenic in water, wherein pentavalent arsenic can be removed by Ferric Salt Flocculants, and trivalent arsenic then can not be removed.This technique passes through Potassium Permanganate Preoxidation, Ferric Salt Flocculants and coagulant aids multi-step dosage, coagulant sedimentation is utilized to remove arsenic in former water, finally retain the small flco not precipitating to fall to be flocculated agent absorption with quartz sand filtration or submerged ultrafiltration further, make arsenic content in effluent quality reach 0.1 ug/L.
By pre-oxidation treatment, rapidly the trivalent arsenic in water can be oxidized to pentavalent arsenic, its ion-reaction equation is:
5AsO
3 3-+2MnO
4-+6H
+=5AsO
4 3-+2Mn
2++3H
2O
Beneficial effect of the present invention is:
Arsenic removal water purifying treating method of the present invention, completes the removal to arsonium ion in the former water of low-temperature and low turbidity by the Ferric Salt Flocculants that cost is very low.Former Water jet cleaning is 0.3-0.6 mg/L, and after the inventive method process, arsenic content reaches 0.1 below ug/L.
Meanwhile, the inventive method is by selecting suitable flocculation agent, and the alumen ustum effect of removing arsenic that flocculation produces is very good.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the process flow sheet of arsenic removal water purifying treating method of the present invention.
Embodiment
In following examples, the water quality parameter of former water to be dealt with is: former water temp 0-5 DEG C, raw water turbidity <1 NTU, former water arsenic concentration 0.3-0.6 mg/L.
Embodiment 1
As shown in Figure 1, a kind of arsenic removal water purifying treating method, comprises step:
1) pass into pending former water to raw water pipeline, and add potassium permanganate, Homogeneous phase mixing in the line mixer installed on raw water pipeline according to trivalent arsenic content;
2) in line mixer, polymeric ferric sulfate flocculant is added, Homogeneous phase mixing; Wherein, the dosage of polymeric ferric sulfate flocculant is 10 mg/L;
3) fully react in Cemented filling to flocculation basin after mixing, form alumen ustum; In flocculation basin, add polyacrylamide coagulant aids, along with the carrying out of reaction, alumen ustum is increasing, after carrying out the flocculation reaction of 40 min, forms large alumen ustum in flocculation basin; Wherein, the dosage of coagulant aids is 1.5 mg/L;
4) after step 3) is fully reacted, the water in flocculation basin and alumen ustum through distribution reservoir uniformly distributing to tube settler;
5) carry out after uniform water distribution through distribution reservoir, water and alumen ustum enter settling tank (precipitation load 4 m by the bottom of tube settler
3/ (m
2h)), water and alumen ustum are from bottom to top through inclined tube, and the flowing of water in inclined tube is more stable, macrobead alumen ustum toward declining, is gathered in the bottom of settling tank, be discharged by shore pipe, and clear water can be gathered in the top of settling tank, catchmented by water leg, enter quartz sand filter tank;
6), after water enters quartz sand filter tank (filter core is quartz sand filter core), some little flcos (cannot be removed by precipitation) are removed after quartz sand filtration, complete arsenic removal clean water treatment; If desired, also sterilizing agent can be added in the pipeline of filtering basin and clean water basin.
When the liquid level in quartz sand filter tank is elevated to certain altitude, back flushing is carried out to filtrate, oppositely intake from filter tank rising pipe, discharge from blow-off pipe.
Former water is after the process of the present embodiment method, and arsenic content reaches 0.1 below ug/L, turbidity <1 NTU.
Embodiment 2
As shown in Figure 1, a kind of arsenic removal water purifying treating method, comprises step:
1) pass into pending former water to raw water pipeline, and add potassium permanganate, Homogeneous phase mixing in the line mixer installed on raw water pipeline according to trivalent arsenic content;
2) in line mixer, polymeric ferric sulfate flocculant is added, Homogeneous phase mixing; Wherein, the dosage of polymeric ferric sulfate flocculant is 12 mg/L;
3) fully react in Cemented filling to flocculation basin after mixing, form alumen ustum; In flocculation basin, add polyacrylamide coagulant aids, along with the carrying out of reaction, alumen ustum is increasing, after carrying out the flocculation reaction of 40 min, forms large alumen ustum in flocculation basin; Wherein, the dosage of coagulant aids is 2 mg/L;
4) after step 3) is fully reacted, the water in flocculation basin and alumen ustum through distribution reservoir uniformly distributing to tube settler;
5) carry out after uniform water distribution through distribution reservoir, water and alumen ustum enter settling tank (precipitation load 5 m by the bottom of tube settler
3/ (m
2h)), water and alumen ustum are from bottom to top through inclined tube, and the flowing of water in inclined tube is more stable, macrobead alumen ustum toward declining, is gathered in the bottom of settling tank, be discharged by shore pipe, and clear water can be gathered in the top of settling tank, catchmented by water leg, enter quartz sand filter tank;
6), after water enters quartz sand filter tank (filter core is quartz sand filter core), some little flcos (cannot be removed by precipitation) are removed after quartz sand filtration, complete arsenic removal clean water treatment; If desired, also sterilizing agent can be added in the pipeline of filtering basin and clean water basin.
When the liquid level in quartz sand filter tank is elevated to certain altitude, back flushing is carried out to filtrate, oppositely intake from filter tank rising pipe, discharge from blow-off pipe.
Former water is after the process of the present embodiment method, and arsenic content reaches 0.1 below ug/L, turbidity <1 NTU.
Embodiment 3
As shown in Figure 1, a kind of arsenic removal water purifying treating method, comprises step:
1) pass into pending former water to raw water pipeline, and add potassium permanganate, Homogeneous phase mixing in the line mixer installed on raw water pipeline according to trivalent arsenic content;
2) in line mixer, polymeric ferric sulfate flocculant is added, Homogeneous phase mixing; Wherein, the dosage of polymeric ferric sulfate flocculant is 8 mg/L;
3) fully react in Cemented filling to flocculation basin after mixing, form alumen ustum; In flocculation basin, add polyacrylamide coagulant aids, along with the carrying out of reaction, alumen ustum is increasing, after carrying out the flocculation reaction of 35 min, forms large alumen ustum in flocculation basin; Wherein, the dosage of coagulant aids is 1.0 mg/L;
4) after step 3) is fully reacted, the water in flocculation basin and alumen ustum through distribution reservoir uniformly distributing to tube settler;
5) carry out after uniform water distribution through distribution reservoir, water and alumen ustum enter settling tank (precipitation load 3 m by the bottom of tube settler
3/ (m
2h)), water and alumen ustum are from bottom to top through inclined tube, and the flowing of water in inclined tube is more stable, macrobead alumen ustum toward declining, is gathered in the bottom of settling tank, be discharged by shore pipe, and clear water can be gathered in the top of settling tank, catchmented by water leg, enter quartz sand filter tank;
6), after water enters quartz sand filter tank (filter core is quartz sand filter core), some little flcos (cannot be removed by precipitation) are removed after quartz sand filtration, complete arsenic removal clean water treatment; If desired, also sterilizing agent can be added in the pipeline of filtering basin and clean water basin.
When the liquid level in quartz sand filter tank is elevated to certain altitude, back flushing is carried out to filtrate, oppositely intake from filter tank rising pipe, discharge from blow-off pipe.
Former water is after the process of the present embodiment method, and arsenic content reaches 0.1 below ug/L, turbidity <1 NTU.
Embodiment 4
As shown in Figure 1, a kind of arsenic removal water purifying treating method, comprises step:
1) pass into pending former water to raw water pipeline, and add potassium permanganate, Homogeneous phase mixing in the line mixer installed on raw water pipeline according to trivalent arsenic content;
2) in line mixer, polymeric ferric sulfate flocculant is added, Homogeneous phase mixing; Wherein, the dosage of polymeric ferric sulfate flocculant is 9 mg/L;
3) fully react in Cemented filling to flocculation basin after mixing, form alumen ustum; In flocculation basin, add polyacrylamide coagulant aids, along with the carrying out of reaction, alumen ustum is increasing, after carrying out the flocculation reaction of 38 min, forms large alumen ustum in flocculation basin; Wherein, the dosage of coagulant aids is 1.8 mg/L;
4) after step 3) is fully reacted, the water in flocculation basin and alumen ustum through distribution reservoir uniformly distributing to tube settler;
5) carry out after uniform water distribution through distribution reservoir, water and alumen ustum enter settling tank (precipitation load 4.5 m by the bottom of tube settler
3/ (m
2h)), water and alumen ustum are from bottom to top through inclined tube, and the flowing of water in inclined tube is more stable, macrobead alumen ustum toward declining, is gathered in the bottom of settling tank, be discharged by shore pipe, and clear water can be gathered in the top of settling tank, catchmented by water leg, enter quartz sand filter tank;
6), after water enters filtering basin, some little flcos (cannot be removed by precipitation) are removed after submerged ultrafiltration filters, and complete arsenic removal clean water treatment; If desired, also sterilizing agent can be added in the pipeline of filtering basin and clean water basin.
When the liquid level in filter tank is elevated to certain altitude, back flushing is carried out to filtrate, oppositely intake from filter tank rising pipe, discharge from blow-off pipe.
Former water is after the process of the present embodiment method, and arsenic content reaches 0.1 below ug/L, turbidity <1 NTU.
Embodiment 5
As shown in Figure 1, a kind of arsenic removal water purifying treating method, comprises step:
1) pass into pending former water to raw water pipeline, and add potassium permanganate, Homogeneous phase mixing in the line mixer installed on raw water pipeline according to trivalent arsenic content;
2) in line mixer, poly ferric chloride flocculant agent is added, Homogeneous phase mixing; Wherein, the dosage of poly ferric chloride flocculant agent is 10 mg/L;
3) fully react in Cemented filling to flocculation basin after mixing, form alumen ustum; In flocculation basin, add polyacrylamide coagulant aids, along with the carrying out of reaction, alumen ustum is increasing, after carrying out the flocculation reaction of 40 min, forms large alumen ustum in flocculation basin; Wherein, the dosage of coagulant aids is 1.5 mg/L;
4) after step 3) is fully reacted, the water in flocculation basin and alumen ustum through distribution reservoir uniformly distributing to tube settler;
5) carry out after uniform water distribution through distribution reservoir, water and alumen ustum enter settling tank (precipitation load 4 m by the bottom of tube settler
3/ (m
2h)), water and alumen ustum are from bottom to top through inclined tube, and the flowing of water in inclined tube is more stable, macrobead alumen ustum toward declining, is gathered in the bottom of settling tank, be discharged by shore pipe, and clear water can be gathered in the top of settling tank, catchmented by water leg, enter quartz sand filter tank;
6), after water enters quartz sand filter tank (filter core is quartz sand filter core), some little flcos (cannot be removed by precipitation) are removed after quartz sand filtration, complete arsenic removal clean water treatment; If desired, also sterilizing agent can be added in the pipeline of filtering basin and clean water basin.
When the liquid level in quartz sand filter tank is elevated to certain altitude, back flushing is carried out to filtrate, oppositely intake from filter tank rising pipe, discharge from blow-off pipe.
Former water is after the process of the present embodiment method, and arsenic content reaches about 10 ug/L, turbidity <1 NTU.
Claims (10)
1. an arsenic removal water purifying treating method, is characterized in that, comprises step:
1) oxygenant is added in the line mixer installed on raw water pipeline, and Homogeneous phase mixing;
2) in described line mixer, Ferric Salt Flocculants is added and Homogeneous phase mixing;
3) fully react in Cemented filling to flocculation basin after mixing, form alumen ustum; Coagulant aids is added in described flocculation basin;
4) after step 3) is fully reacted, the water in described flocculation basin and alumen ustum through distribution reservoir uniformly distributing to settling tank;
5) clear water on described settling tank top is collected by water leg;
6) filtration step 5) clear water collected, to remove small flco, complete arsenic removal clean water treatment.
2. arsenic removal water purifying treating method as claimed in claim 1, it is characterized in that: in step 1), described oxygenant is potassium permanganate.
3. arsenic removal water purifying treating method as claimed in claim 1, is characterized in that: step 2) in, described Ferric Salt Flocculants is polymeric ferric sulfate flocculant.
4. arsenic removal water purifying treating method as described in claim 1 or 3, is characterized in that: the dosage of described Ferric Salt Flocculants is 8-12 mg/L.
5. arsenic removal water purifying treating method as claimed in claim 1, it is characterized in that: in step 3), described coagulant aids is polyacrylamide.
6. arsenic removal water purifying treating method as described in claim 1 or 5, is characterized in that: the dosage of described coagulant aids is 1-2 mg/L.
7. arsenic removal water purifying treating method as claimed in claim 1, it is characterized in that: in step 3), the flocculation reaction time is 35-40 min.
8. arsenic removal water purifying treating method as claimed in claim 1, it is characterized in that: in step 4), described settling tank is tube settler.
9. arsenic removal water purifying treating method as described in claim 1 or 8, is characterized in that: in step 4), and the precipitation load of described settling tank is 3-5 m
3/ (m
2h).
10. arsenic removal water purifying treating method as claimed in claim 1, is characterized in that: in step 5), adopts quartz sand filter media or submerged ultrafiltration to filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510375882.4A CN104961275A (en) | 2015-07-01 | 2015-07-01 | Arsenic removing water purification treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510375882.4A CN104961275A (en) | 2015-07-01 | 2015-07-01 | Arsenic removing water purification treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104961275A true CN104961275A (en) | 2015-10-07 |
Family
ID=54215405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510375882.4A Pending CN104961275A (en) | 2015-07-01 | 2015-07-01 | Arsenic removing water purification treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104961275A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105254076A (en) * | 2015-11-16 | 2016-01-20 | 苏州南风优联环保工程有限公司 | Simple and efficient nickel-containing wastewater treating process |
| CN105502757A (en) * | 2015-12-09 | 2016-04-20 | 重庆远达水务有限公司 | Industrial treatment method of high-concentration arsenic-containing wastewater |
| CN106242121A (en) * | 2016-09-05 | 2016-12-21 | 吉林市润成膜科技有限公司 | A kind of composite drug preparation method removing arsenic in water |
| CN106430697A (en) * | 2016-08-03 | 2017-02-22 | 吴小慧 | Method for treating tin-plating sewage |
| CN107055691A (en) * | 2017-01-24 | 2017-08-18 | 鄂尔多斯市蒙健螺旋藻业有限责任公司 | A kind of continous way arsenic removing apparatus |
| CN114349214A (en) * | 2022-01-04 | 2022-04-15 | 湖南云河信息科技有限公司 | Efficient arsenic removal process and device for underground water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0811234B2 (en) * | 1993-09-17 | 1996-02-07 | 壽化工機株式会社 | Dearsenic treatment method for water containing arsenic |
| CN1733616A (en) * | 2004-08-11 | 2006-02-15 | 北京精密单因子水工程技术有限公司 | Arsenic comprising groundwater processing method |
| CN102167457A (en) * | 2011-03-17 | 2011-08-31 | 天津大学 | Arsenic removal method through combination of oxychlorination, ferric salt flocculation and microfiltration |
-
2015
- 2015-07-01 CN CN201510375882.4A patent/CN104961275A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0811234B2 (en) * | 1993-09-17 | 1996-02-07 | 壽化工機株式会社 | Dearsenic treatment method for water containing arsenic |
| CN1733616A (en) * | 2004-08-11 | 2006-02-15 | 北京精密单因子水工程技术有限公司 | Arsenic comprising groundwater processing method |
| CN102167457A (en) * | 2011-03-17 | 2011-08-31 | 天津大学 | Arsenic removal method through combination of oxychlorination, ferric salt flocculation and microfiltration |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105254076A (en) * | 2015-11-16 | 2016-01-20 | 苏州南风优联环保工程有限公司 | Simple and efficient nickel-containing wastewater treating process |
| CN105502757A (en) * | 2015-12-09 | 2016-04-20 | 重庆远达水务有限公司 | Industrial treatment method of high-concentration arsenic-containing wastewater |
| CN106430697A (en) * | 2016-08-03 | 2017-02-22 | 吴小慧 | Method for treating tin-plating sewage |
| CN106242121A (en) * | 2016-09-05 | 2016-12-21 | 吉林市润成膜科技有限公司 | A kind of composite drug preparation method removing arsenic in water |
| CN107055691A (en) * | 2017-01-24 | 2017-08-18 | 鄂尔多斯市蒙健螺旋藻业有限责任公司 | A kind of continous way arsenic removing apparatus |
| CN107055691B (en) * | 2017-01-24 | 2023-09-19 | 鄂尔多斯市蒙健螺旋藻业有限责任公司 | Continuous arsenic removal device |
| CN114349214A (en) * | 2022-01-04 | 2022-04-15 | 湖南云河信息科技有限公司 | Efficient arsenic removal process and device for underground water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104961275A (en) | Arsenic removing water purification treatment method | |
| CN102417253B (en) | In-depth treatment zero-discharge recovery equipment for heavy metal waste water | |
| CN204824453U (en) | Desulfurization pretreatment of water device that gives up | |
| CN103951114B (en) | A kind of heavy metal wastewater thereby tertiary treatment and deep purifying reuse technology | |
| CN103241860A (en) | Combined treatment device and process for acid-washing wastewater of stainless steel | |
| CN106380016A (en) | Steel pickling wastewater treatment and reuse method and device | |
| CN102774991A (en) | Arsenic-removing device and method for gallium arsenide wafer production and processing waste water | |
| CN203922907U (en) | The external dephosphorization algae removal of a kind of landscape water body purifying processing device | |
| CN203922951U (en) | A kind of fluorine-contained wastewater treatment system | |
| CN205115201U (en) | Reverse osmosis desalination system | |
| CN207726791U (en) | A kind of water treatment system using sedimentation basin body refuse reflow treatment low temperature and low turbidity water | |
| CN102040300A (en) | Water treatment device applicable to various water sources | |
| CN202265468U (en) | Equipment for deeply treating and recovering heavy metal waste water with zero discharge | |
| CN202576135U (en) | Device for producing drinking water through coal mine water | |
| CN104829011A (en) | Method for deep phosphorus removal for phosphorus-containing sewage | |
| CN209259867U (en) | Water treatment system with high salt | |
| CN204778988U (en) | Remove arsenic water purification unit | |
| CN204569609U (en) | Industrial sewage pretreatment system | |
| CN108483715A (en) | A kind of processing method of Electroplating Wastewater, nickel | |
| CN205528261U (en) | Stainless steel pickling wastewater treatment device | |
| CN104003553A (en) | Equipment for removing lead in wastewater of lead storage battery | |
| CN211770669U (en) | Paint sewage treatment plant | |
| CN204588885U (en) | Comprehensive wastewater treatment unit | |
| CN208603898U (en) | A kind of graphite waste water treatment system | |
| CN107162289A (en) | A kind of AEC electric flocculations Waste Water Treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151007 |