CN101077816A - Highly effective sterilization metallurgy sewage treatment method - Google Patents
Highly effective sterilization metallurgy sewage treatment method Download PDFInfo
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- CN101077816A CN101077816A CNA2007100620818A CN200710062081A CN101077816A CN 101077816 A CN101077816 A CN 101077816A CN A2007100620818 A CNA2007100620818 A CN A2007100620818A CN 200710062081 A CN200710062081 A CN 200710062081A CN 101077816 A CN101077816 A CN 101077816A
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- water
- reverse osmosis
- sterilise
- sewage
- metallurgy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The metallurgical effluent treating process with high bactericidal efficiency belongs to the field of waste water treating technology, and aims at raising the bactericidal efficiency of metallurgical effluent treating process. The process includes the following steps: 1, recovering effluent and preparing intermediate water; 2. the primary sterilizing with oxidant disinfectant; 3. ultrafiltering and secondary sterilizing with non-oxidant disinfectant; and 4. reverse osmosis desalting. The process can ensure the normal running of the reverse osmosis system, prolong its chemical cleaning period, lower metallurgical effluent treating cost and reduce environmental pollution caused by the exhausted waste detergent solution.
Description
Technical field
The present invention relates to a kind of water treatment method, particularly in the processing and recycling process of metallurgy industry industrial sewage, improve the method for sterilization effect, belong to technical field of waste water processing.
Background technology
Water is important and valuable resource, and along with the quickening of process of industrialization, the water resources disparities between supply and demand become increasingly conspicuous.Metallurgy industry is the water rich and influential family, in process of production, a large amount of industrial sewage dischargings is arranged on the one hand, and environment is polluted, and need again on the other hand to consume a large amount of de-salted waters, so environmental pollution and water consumption problem is all very outstanding.For alleviating the disparities between supply and demand of water resources, begin to adopt two embrane method (ultrafiltration+reverse osmosis) Technologies to handle metallurgic sewage in recent years, make it to reach the purpose that recycles, Fig. 1 is seen in its technical process, it utilizes metallurgic sewage to do the water source, with the reverse osmosis process is core, through ultrafiltration remove suspended substance, colloidalmaterial, turbidity material, bacterium, organism in the water source make produce water turbidity less than 1NTU, SDI less than 3, squeeze into reverse osmosis membrane assembly with high-pressure pump again, 97% ion is filtered off in reverse osmosis membrane assembly water, thereby produces de-salted water.According to current technology, when ultrafiltration moves, add oxidizing bactericide (clorox) continuously and carry out sterilization, this technology finds to exist following point in operational process: because metallurgic sewage water quality composition complexity, every index fluctuation is bigger, bacterial species and quantity are more, the single sterilization requirement that can not satisfy reverse osmosis with the clorox method for disinfection, water is seriously polluted to reverse osmosis in causing in operational process, the matting cycle shortens, the shortest in one month, had a strong impact on the normal operation of reverse osmosis.
Summary of the invention
Problem to be solved by this invention is to overcome the defective of prior art and metallurgy sewage treatment method that a kind of efficient sterilizing is provided, this method is utilized oxidizing bactericide and non-oxidizable sterilant to unite and is added, improve sterilization effect, thereby guarantee the normal operation of reverse osmosis.
The method of the invention is solved by following technical scheme:
A kind of metallurgy sewage treatment method of efficient sterilizing, its special feature is: described method is undertaken by following operation:
A. reclaim sewage, produce middle water: the sewage of getting the metallurgy industry water drain reaches the middle water requirement of water suspension less than 100mg/l through flocculation, post precipitation;
B. a sterilization: water in above-mentioned is filtered through 1mm grid filtration device, add oxidizing bactericide and carry out sterilization and disinfection, dosage is 2～3mg/l;
C. uf processing and re-sterilise: with water among the step B after uf processing, reach SDI less than 3, add non-oxidizable sterilant at the product jellyfish pipe of ultrafiltration and carry out re-sterilise, the time of adding be per 5～8 days once, added 60 minutes, dosage is 30～50mg/l at every turn;
D. reverse osmosis desalination is handled: the water after ultrafiltration and re-sterilise processing enters reverse osmosis unit and carries out desalting treatment.
The metallurgy sewage treatment method of above-mentioned efficient sterilizing, the oxidizing bactericide of a described germicidal treatment are clorox, and the non-oxidizable sterilant that re-sterilise is handled is an isothiazolinone.
The metallurgy sewage treatment method of above-mentioned efficient sterilizing, described non-oxidizable sterilant adopts the impact type dosing method.
The problem that the inventive method is at metallurgic sewage water quality composition complexity, bacterial species and quantity is more, existing method for disinfection can not satisfy reverse osmosis sterilization requirement is improved, it adopts oxidizing bactericide and non-oxidizable sterilant to unite to add to carry out germ-resistant method, obviously improved sterilization effect.Adopt this method can guarantee the normal operation of reverse osmosis system, prolong the matting cycle of reverse osmosis, reduce the cleaning charge usefulness of reverse osmosis membrane, reduce the consumption of scavenging solution and the environmental pollution caused by discharge of cleaning waste liquid.Trial run shows that after employing the inventive method, the Chemical Cleaning for Reverse Osmosis cycle was extended for five～six months by original 1 month, can save the matting expense of considerable number every year, greatly reduced the running cost that metallurgic sewage is handled.
Description of drawings
Fig. 1 is the process flow sheet of prior art
Fig. 2 is a process flow sheet of the present invention.
Embodiment
Referring to Fig. 2, processing method of the present invention is described in further detail below in conjunction with accompanying drawing:
The inventive method is suitable for metallurgy industry and handles the industrial sewage use, principal feature is to adopt oxidizing bactericide (clorox) and non-oxidizable sterilant (isothiazolinone) to unite to add to carry out sterilization, to guarantee the normal steady running of reverse osmosis, the effect of its key step is as follows:
1. recovery sewage, produce middle water: the sewage of getting the metallurgy industry water drain is gone into settling tank, add flocculation agent ferrous sulfate or PAC, make tiny suspended substance, colloidal particle in the sewage of recovery flocculate bigger particle and sedimentation, add-on is adjusted according to the water quality that reclaims sewage.Through flocculation, precipitation, make it go out water suspension less than 100mg/l.
2. carry out sterilization for the first time in middle water treatment procedure: for guaranteeing the normal operation of ultra-filtration equipment, need quantitatively to add the oxidizing bactericide clorox with volume pump in middle water treatment procedure and carry out sterilization and disinfection, dosage is 2～3mg/l.Clorox decomposes rapidly in water, and its detailed process is as follows:
NaCLO can resolve into HCLO rapidly in water
NaCLO+H
2O＝HCLO+NaOH
HCLO can resolve into H in water
+And CLO
-
HCLOH
++CLO
-
NaCLO, HCLO, CLO
-, always be collectively referred to as chlorine residue (in mg/l), the germ-killing efficiency of chlorine residue is directly proportional with the concentration of undecomposed HCLO, HCLO compares CLO
-Germ-killing efficiency high 100 times, the ratio of the HCLO that do not dissociate reduces with pH value and increases (seeing Table 1).CLO
-Be more weak sterilant, because it has electric charge, be difficult for diffusing into cytolemma, HCLO then can comparatively fast enter cytolemma and cause high toxicity.
Table 1:HCLO, CLO
-Relation with pH value
| PH value | 5.0 | 5.3 | 5.6 | 6.0 | 7.0 | 7.5 | 8.0 | 9.0 | 9.5 | |
| 0℃ | ω(HOCl)％ | 100 | 100 | 100 | 98 | 83 | 60 | 30 | 5 | 0 |
| ω (OC1- -)％ | 0 | 0 | 0 | 2 | 17 | 40 | 70 | 95 | 100 | |
| 20℃ | ω(HOCl)％ | 100 | 100 | 98 | 96 | 73 | 50 | 20 | 2 | 0 |
| ω (OCl- -)％ | 0 | 0 | 2 | 4 | 27 | 50 | 80 | 98 | 100 | |
Bacterium, microbial contamination appear in reverse osmosis system equipment inwall in actual motion, have influenced the normal operation of system, have shortened the matting cycle (the shortest in 1 month) of reverse osmosis, and the PH of metallurgical industry water wasting 〉=7.5 are difficult to guarantee sterilization effect like this.
3. uf processing and sterilization once more: the function of ultrafiltration is the water inlet requirement that biological pollutant, particulate matter, colloidalmaterial, turbidity, the bacterium in the water satisfied reverse osmosis in removing.But since ultra-filtration membrane in last process not the rejection of killing bacteria can not reach 100%, killing bacteria breeding in the higher sewage of water quality complexity, water temperature is very not fast, some linear bacteriums can pass the filter core of film silk and security personnel's strainer, arrive reverse osmosis unit, the polluted membrane system.For guaranteeing that the next procedure reverse osmosis system gets normally operation, adopt volume pump to add non-oxidizable sterilant and guarantee sterilization effect in ultrafiltration product jellyfish pipe impact type.Theoretical foundation is as follows:
The sterilization mechanism of non-oxide bactericide of iso-thiazolinone: work the effect of killing livestock by the key that disconnects bacterium.Isothiazolinone can promptly suppress its growth with after microorganism contacts.And this process of inhibition is irreversible, thereby causes the death of bacterium or microorganism.It can penetrate the microbial film that is attached on the equipment surface rapidly, and the microorganism under the microbial film is effectively controlled.And the good performance of killing livestock is all arranged in the pH value scope of broad, and lasting medicine is water miscible, can be in the same place with some composite reagents.Its energy and NaCLO are compatible with each other in water.
Non-oxidizable sterilant adopts the impact type dosing method, and this is the method that a kind of interruption adds medicament, and it adds a large amount of medicaments at short notice, and this dosing method is convenient to operation and maintenance, helps controlling the concentration that adds of medicament, can guarantee sterilization effect.The dosing interval time changes according to water temperature to be adjusted, and is generally 5～8 days once, adds 60 minutes at every turn, and dosage is 30～50mg/l.
4. reverse osmosis desalination is handled: enter reverse osmosis unit through the product of the ultrafiltration behind re-sterilise water and carry out desalting treatment, the pre-de-salted water of its one-level reverse osmosis produced water, two-pass reverse osmosis produce water desalination water and can satisfy different water of productive use needs respectively.
Several embodiment below are provided:
Embodiment 1:
A. reclaim sewage, produce middle water: the sewage of getting the metallurgy industry water drain reaches the middle water requirement of water suspension less than 100mg/l through flocculation, post precipitation;
B. a sterilization: water in above-mentioned is filtered through 1mm grid filtration device, add the oxidizing bactericide clorox and carry out sterilization and disinfection, main effect suppresses growing of bacterium, microorganism.Dosage is 2mg/l.
C. uf processing and re-sterilise: the middle water that step B is handled is after uf processing, reach SDI less than 3, add non-oxidizable bactericide of iso-thiazolinone at the product jellyfish pipe of ultrafiltration and carry out re-sterilise, with reduce the bacterium in the feed water by reverse osmosis, the content of microorganism prolongs the matting cycle of reverse osmosis.26 ℃ of water temperatures, the time of adding be per 8 days once, added 60 minutes at every turn, dosage is 30mg/l, handles back product water through ultrafiltration and re-sterilise and enters reverse osmosis.
D. reverse osmosis desalination is handled: the water after ultrafiltration and re-sterilise processing enters reverse osmosis unit and carries out desalting treatment.
Embodiment 2:
A. reclaim sewage, produce middle water: the sewage of getting the metallurgy industry water drain reaches the middle water requirement of water suspension less than 100mg/l through flocculation, post precipitation;
B. a sterilization: water in above-mentioned is filtered through 1mm grid filtration device, add the oxidizing bactericide clorox and carry out sterilization and disinfection, main effect suppresses growing of bacterium, microorganism.Dosage is 3mg/l.
C. uf processing and re-sterilise: the middle water that step B is handled is after uf processing, reach SDI less than 3, add non-oxidizable bactericide of iso-thiazolinone at the product jellyfish pipe of ultrafiltration and carry out re-sterilise, with reduce the bacterium in the feed water by reverse osmosis, the content of microorganism prolongs the matting cycle of reverse osmosis.29 ℃ of water temperatures, the time of adding be per 6 days once, added 60 minutes at every turn, dosage is 40mg/l, handles back product water through ultrafiltration and re-sterilise and enters reverse osmosis.
D. reverse osmosis desalination is handled: the water after ultrafiltration and re-sterilise processing enters reverse osmosis unit and carries out desalting treatment.
Embodiment 3:
A. reclaim sewage, produce middle water: the sewage of getting the metallurgy industry water drain reaches the middle water requirement of water suspension less than 100mg/l through flocculation, post precipitation;
B. a sterilization: water in above-mentioned is filtered through 1mm grid filtration device, add the oxidizing bactericide clorox and carry out sterilization and disinfection, main effect suppresses growing of bacterium, microorganism.Dosage is 2.5mg/l.
C. uf processing and re-sterilise: with water among the step B after uf processing, reach SDI less than 3, add non-oxidizable bactericide of iso-thiazolinone at the product jellyfish pipe of ultrafiltration and carry out re-sterilise, with reduce the bacterium in the feed water by reverse osmosis, the content of microorganism prolongs the matting cycle of reverse osmosis.31 ℃ of water temperatures, the time of adding be per 5 days once, added 60 minutes at every turn, dosage is 50mg/l, handles back product water through ultrafiltration and re-sterilise and enters reverse osmosis.
D. reverse osmosis desalination is handled: the water after ultrafiltration and re-sterilise processing enters reverse osmosis unit and carries out desalting treatment.
Claims (3)
1. the metallurgy sewage treatment method of an efficient sterilizing, it is characterized in that: described method is undertaken by following operation:
A. reclaim sewage, produce middle water: the sewage of getting the metallurgy industry water drain reaches the middle water requirement of water suspension less than 100mg/l through flocculation, post precipitation;
B. a sterilization: water in above-mentioned is filtered through 1mm grid filtration device, add oxidizing bactericide and carry out sterilization and disinfection, dosage is 2～3mg/l;
C. uf processing and re-sterilise: with water among the step B after uf processing, reach SDI less than 3, add non-oxidizable sterilant at the product jellyfish pipe of ultrafiltration and carry out re-sterilise, the time of adding be per 5～8 days once, added 60 minutes, dosage is 30～50mg/l at every turn;
D. reverse osmosis desalination is handled: the water after ultrafiltration and re-sterilise processing enters reverse osmosis unit and carries out desalting treatment.
2. the metallurgy sewage treatment method of efficient sterilizing according to claim 1, it is characterized in that: the oxidizing bactericide of a described germicidal treatment is a clorox, the non-oxidizable sterilant that re-sterilise is handled is an isothiazolinone.
3. the metallurgy sewage treatment method of efficient sterilizing according to claim 1 and 2 is characterized in that: described non-oxidizable sterilant employing impact type dosing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100620818A CN100534930C (en) | 2007-06-05 | 2007-06-05 | Highly effective sterilization metallurgy sewage treatment method |
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|---|---|---|---|
| CNB2007100620818A CN100534930C (en) | 2007-06-05 | 2007-06-05 | Highly effective sterilization metallurgy sewage treatment method |
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| CN101077816A true CN101077816A (en) | 2007-11-28 |
| CN100534930C CN100534930C (en) | 2009-09-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698605A (en) * | 2012-06-06 | 2012-10-03 | 山东招金膜天有限责任公司 | Dry-state preservation method for ultra-filtration membrane component |
| CN106007059A (en) * | 2016-06-22 | 2016-10-12 | 成都丽雅纤维股份有限公司 | Reverse osmosis production method for demineralized water and device |
| US9617170B2 (en) | 2012-04-20 | 2017-04-11 | Kemira Oyj | Water treatment |
| CN112624391A (en) * | 2020-11-13 | 2021-04-09 | 浙江恒洋热电有限公司 | Economic raw water sterilization and algae removal process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073133A (en) * | 2011-10-26 | 2013-05-01 | 中国石油化工股份有限公司 | Low-microbial-contamination wastewater deep recycling process |
-
2007
- 2007-06-05 CN CNB2007100620818A patent/CN100534930C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9617170B2 (en) | 2012-04-20 | 2017-04-11 | Kemira Oyj | Water treatment |
| CN102698605A (en) * | 2012-06-06 | 2012-10-03 | 山东招金膜天有限责任公司 | Dry-state preservation method for ultra-filtration membrane component |
| CN106007059A (en) * | 2016-06-22 | 2016-10-12 | 成都丽雅纤维股份有限公司 | Reverse osmosis production method for demineralized water and device |
| CN112624391A (en) * | 2020-11-13 | 2021-04-09 | 浙江恒洋热电有限公司 | Economic raw water sterilization and algae removal process |
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| Publication number | Publication date |
|---|---|
| CN100534930C (en) | 2009-09-02 |
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Free format text: CORRECT: ADDRESS; FROM: 056015 INTELLECTUAL PROPERTY DIVISION, HANDAN IRON + STEEL TECHNOLOGY CENTER, NO.232,FUXING ROAD,FUXING DISTRICT, HANDAN CITY, HEBEI PROVINCE TO: 050000 NO.40, YUHUA WEST ROAD, SHIJIAZHUANG CITY, HEBEI PROVINCE |
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Effective date of registration: 20100329 Address after: Yuhua city of Shijiazhuang province Hebei 050000 West Road No. 40 Patentee after: Hebei Iron & Steel Co., Ltd. Address before: 056015 intellectual property department, Handan Iron and Steel Technology Center, Fuxing Road, Fuxing District, Hebei, Handan 232, China Patentee before: Handan Iron & Steel Co., Ltd. |
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Granted publication date: 20090902 Termination date: 20120605 |