CN100486910C - Treatment method for decoloring sewerage - Google Patents
Treatment method for decoloring sewerage Download PDFInfo
- Publication number
- CN100486910C CN100486910C CNB2006101521656A CN200610152165A CN100486910C CN 100486910 C CN100486910 C CN 100486910C CN B2006101521656 A CNB2006101521656 A CN B2006101521656A CN 200610152165 A CN200610152165 A CN 200610152165A CN 100486910 C CN100486910 C CN 100486910C
- Authority
- CN
- China
- Prior art keywords
- sewage
- treatment method
- chlorine
- decoloration treatment
- decoloration
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Inorganic materials Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims abstract description 14
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000460 chlorine Substances 0.000 claims abstract description 12
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 12
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920005610 lignin Polymers 0.000 claims abstract description 11
- 239000010865 sewage Substances 0.000 claims description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 6
- 238000006460 hydrolysis reaction Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 abstract description 8
- -1 hypochlorite ions Chemical class 0.000 abstract description 3
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 15
- 238000004042 decolorization Methods 0.000 description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000000975 dye Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 description 3
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 description 3
- 235000012141 vanillin Nutrition 0.000 description 3
- 238000005904 alkaline hydrolysis reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OOCCDEMITAIZTP-QPJJXVBHSA-N (E)-cinnamyl alcohol Chemical compound OC\C=C\C1=CC=CC=C1 OOCCDEMITAIZTP-QPJJXVBHSA-N 0.000 description 1
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- DYUQAZSOFZSPHD-UHFFFAOYSA-N Phenylpropyl alcohol Natural products CCC(O)C1=CC=CC=C1 DYUQAZSOFZSPHD-UHFFFAOYSA-N 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000005691 oxidative coupling reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
This invention discloses a method for decoloring wastewater. The method comprises: (1) introducing chlorine into wastewater, and hydrolyzing to form hypochlorous acid; (2) partly converting hypochlorous acid into hypochlorite ions in an alkaline condition; (3) reacting hypochlorite ions with lignin molecules in wastewater to form CO2 and H2O. When treating wastewater after biochemical treatment by this method, the color degree can be reduced by 30-40 times with a decoloring rate up to 80%, and COD and BOD5 of the wastewater can be obviously reduced.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, refer in particular to a kind of sewage water treatment method that sewage after biochemical treatment is further decoloured.
Background technology
The principal pollutant that cause papermaking wastewater to have serious colourity are xylogen, and xylogen is present in the papermaking natural fiber---in timber, dogstail, reed, the cotton stalk, in pulping and papermaking processes, xylogen is dissolved into sewage from raw material.Because itself is Vandyke brown xylogen, so papermaking wastewater has very heavy colourity, pulping sewage is called black liquor again, is because wherein contain a large amount of xylogen.In the sewage of papermaking stage casing, content of lignin approximately be in the paper making raw material content of lignin 20%, so the color of papermaking stage casing sewage is also quite heavy.
Xylogen is a kind of natural high moleculer eompound, and its molecular structure is quite complicated, mainly mixes owing to its biosynthetic process morely and causes.When with acid, alkali, salt or high-temperature water, microorganism and natural fiber material generation chemistry and biochemical reaction, the xylogen macromole promptly is subjected to destruction in various degree, people can only be by the chemical structure after the xylogen macromole is decomposed by part, come " piecing together ", " deduction " molecular structure of xylogen of virgin state.More common viewpoint thinks that xylogen is two or three pair of random oxidative coupling of monohydroxy styryl carbinol of some amount and the macromolecular compound (polymkeric substance) that produces.Exist a large amount of phenyl ring in the lignin molecule structure, unsaturated terminal chain (generally containing three carbon atoms), phenolic hydroxyl group, carbonyl, ether etc. are arranged on its molecular side chain, so xylogen belongs to the difficult biochemical organic pollutant that colourity is arranged again.Papermaking wastewater is being carried out in the process of biochemical treatment, long duration of action (reaction times generally reaches 36～48 hours) by anaerobism, hold concurrently oxygen and aerobic microbiological, can be degraded (comprising the less xylogen of molecular weight " fragment ") by biochemical material in the sewage, but remaining pollutent then mainly is the bigger lignin molecule of undegradable molecular weight " fragment ", promptly contains the phenylpropyl alcohol alkane of phenyl ring and has not isoplastic benzene compounds.Because so the xylogen bio-refractory is after the biochemical treatment, although COD, BOD
5Have significantly and descend, but it is still heavier that the bio-chemical effluent look becomes, in order thoroughly to solve the colourity problem of bio-chemical effluent, methods such as chemical coagulation and precipitation commonly used, charcoal absorption, ozone decolorization, electrolytic oxidation decolouring, these treatment process ubiquity cost height, need are defectives such as flushing, energy consumption height repeatedly, have limited it and have promoted the use of.
Summary of the invention
At above-mentioned present situation, the object of the present invention is to provide that a kind of cost is low, energy consumption is low, convenient operation and management, can realize the decoloration treatment method of the sewage of control automatically.
For achieving the above object, the decoloration treatment method of a kind of sewage of the present invention, comprise following process: at first chlorine is thrown in the sewage, behind the chlorine leach with water generation hydrolysis reaction, generate hypochlorous acid, hypochlorous acid is converted into hypochlorite in alkaline water quality environment lower section, and the lignin molecule generation chemical reaction in hypochlorite and the sewage makes lignin molecule be oxidized to CO
2And H
2O.
Further, described sewage is the sewage through preliminary biochemical treatment.
Further, the injected volume of described chlorine is every 1m
3Sewage 150--300g.
Further, the described chlorine input sewage afterreaction time is 1-2 hours.
Further, described sewage is the sewage after preliminary biochemical treatment of paper mill or dye processing plant or pigment factory or tannery's discharging.
Further, described sewage is the sewage of paper mill or the direct discharging in dye processing plant or pigment factory or tannery.
Further, the pH value of sewage is 6.5～7.5 in described chemical reaction process.
Further, described chlorine is liquid, and the micropore reliever quantitatively is released in the sewage with the microbubble form to water from micropore in the described liquid chlorine warp.
Further, described liquid chlorine adopts mode of jet quantitatively to be released in the sewage.
Adopt the sewage after aforesaid method is handled biochemical treatment, when effluent color dilution after the biochemical treatment was 150～200 times, after the inventive method was handled, colourity dropped to 30～40 times, and percent of decolourization reaches 80%, simultaneously, also makes the COD (chemical oxygen demand (COD)) and the BOD of bio-chemical effluent
5(five-day BOD) obviously reduces, and be as shown in the table:
In addition, adopt aforesaid method, method costs such as traditional chemical coagulation and precipitation, charcoal absorption, ozone decolorization, electrolytic oxidation decolouring are low than adopting, and need not complicated treatment facility, no scum silica frost and waste active carbon produce, convenient operation and management can realize automatic control, and the inventive method also is applicable to be handled the degree of depth decolouring of sewage after biochemical treatment of dischargings such as dyestuff, pigment, tannery.And, with liquid chlorine adopt mode of jet or through in the micropore reliever quantitatively be released in the sewage with the microbubble form to water from micropore, can make the meltage of liquid chlorine in sewage more even, further improve percent of decolourization.
Embodiment
The decoloration treatment method of sewage of the present invention, comprise following process: adopt mode of jet or middle micropore reliever liquid chlorine to be invested in the sewage after biochemical treatment of paper mill discharging at normal temperatures, with water generation hydrolysis reaction, generate hypochlorous acid behind the chlorine leach, its reaction formula is:
CL
2+H
2O＝＝HOCL+CL
-+H
+
HOCL→H
+OCL
-
Hypochlorous acid (HOCL) is a kind of strong oxidizer, is converted into hypochlorite (0CL in alkaline water quality environment lower section
-), hypochlorite and the lignin molecule generation chemical reaction that residues in the bio-chemical effluent progressively are oxidized to CO to the carbon on the unsaturated chain on the phenyl ring, hydrogen
2And H
2O in the real reaction process, destroys phenyl ring earlier, and then carbon, hydroxide are generated CO
2And H
2O, concrete reaction process is as follows: at first make the oxidation of phenyl ring alkaline hydrolysis:
In above-mentioned reaction process, the phenyl ring alkaline hydrolysis is Vanillin and multiple other products, and Vanillin is further by hypochlorous acid oxidization then, and reaction process is as follows:
After above-mentioned reaction, Vanillin is oxidized to CO
2And H
2O, at this moment most lignin molecules and other look class material have been oxidized to CO in the sewage
2And H
2O, the colourity of sewage descends significantly.In above-mentioned reaction process, the pH value of sewage is controlled between 6.5～7.5, and the reaction times is 1-2 hours, every 1m
3Adding the liquid chlorine amount in the bio-chemical effluent is 150--300g, can be less than or equal to 50 times (extension rate methods) for benchmark according to bio-chemical effluent colourity size and decolouring back effluent color dilution in actual implementation process, is adjusted;
In throwing in the liquid chlorine process, can adopt the jet that has certain pressure promptly to spray the formation negative pressure through adapter bonnet and make liquid chlorine be dissolved in the sewage current, or the micropore reliever quantitatively discharges liquid chlorine and liquid chlorine is diffused in the sewage with the microbubble form to water from micropore in the warp with sump pump pump pressure or liquid level difference.
When bio-chemical effluent colourity was 150～200 times, after the inventive method was handled, colourity dropped to 30～40 times, and percent of decolourization reaches 80%, simultaneously, also makes the COD (chemical oxygen demand (COD)) and the BOD of bio-chemical effluent
5(five-day BOD) obviously reduces, and be as shown in the table:
In addition, adopt aforesaid method, method costs such as traditional chemical coagulation and precipitation, charcoal absorption, ozone decolorization, electrolytic oxidation decolouring are low than adopting, and need not complicated treatment facility, no scum silica frost and waste active carbon produce, convenient operation and management can realize automatic control, and the inventive method is applicable to also that the sewage to dischargings such as dyestuff, pigment, tanneries directly decolours and handles and the degree of depth decolouring of above-mentioned sewage after biochemical treatment handled.
Claims (7)
1, a kind of decoloration treatment method of sewage, it is characterized in that, comprise following process: at first chlorine is thrown in the sewage, behind the chlorine leach with water generation hydrolysis reaction, generate hypochlorous acid, hypochlorous acid is converted into hypochlorite in alkaline water quality environment lower section, and the lignin molecule generation chemical reaction in hypochlorite and the sewage makes lignin molecule be oxidized to CO
2And H
2O, the injected volume of described chlorine are every 1m
3Sewage 150--300g, it is 1-2 hours that chlorine drops into the sewage afterreaction time.
2, the decoloration treatment method of sewage as claimed in claim 1 is characterized in that, described sewage is the sewage through preliminary biochemical treatment.
3, the decoloration treatment method of sewage as claimed in claim 2 is characterized in that, described sewage is the sewage after preliminary biochemical treatment of paper mill or dye processing plant or pigment factory or tannery's discharging.
4, the decoloration treatment method of sewage as claimed in claim 1 is characterized in that, described sewage is the sewage of paper mill or the direct discharging in dye processing plant or pigment factory or tannery.
5, the decoloration treatment method of sewage as claimed in claim 1 is characterized in that, the pH value of sewage is 6.5～7.5 in described chemical reaction process.
6, the decoloration treatment method of sewage as claimed in claim 1 is characterized in that, described chlorine is liquid, and the micropore reliever quantitatively is released in the sewage with the microbubble form to water from micropore in the described liquid chlorine warp.
7, the decoloration treatment method of sewage as claimed in claim 6 is characterized in that, described liquid chlorine adopts mode of jet quantitatively to be released in the sewage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101521656A CN100486910C (en) | 2006-09-15 | 2006-09-15 | Treatment method for decoloring sewerage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101521656A CN100486910C (en) | 2006-09-15 | 2006-09-15 | Treatment method for decoloring sewerage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1915854A CN1915854A (en) | 2007-02-21 |
| CN100486910C true CN100486910C (en) | 2009-05-13 |
Family
ID=37736956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101521656A Expired - Fee Related CN100486910C (en) | 2006-09-15 | 2006-09-15 | Treatment method for decoloring sewerage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100486910C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314755A (en) * | 2014-06-23 | 2016-02-10 | 高嵩 | Method being suitable for treatment of bleaching-and-dyeing and papermaking sewages |
-
2006
- 2006-09-15 CN CNB2006101521656A patent/CN100486910C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 絮凝－ClO2 氧化法处理造纸废水. 王九思等.甘肃科学学报，第14卷第2期. 2002 |
| 絮凝－ClO2 氧化法处理造纸废水. 王九思等.甘肃科学学报，第14卷第2期. 2002 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1915854A (en) | 2007-02-21 |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shandong Swan Water Engineering Co., Ltd. Assignor: Pang Pengyuan Contract fulfillment period: 2009.6.15 to 2016.9.14 Contract record no.: 2009370000433 Denomination of invention: Treatment method for decoloring sewerage Granted publication date: 20090513 License type: Exclusive license Record date: 20091015 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.6.15 TO 2016.9.14; CHANGE OF CONTRACT Name of requester: SHANDONG SWAN WATER ENGINEERING CO., LTD. Effective date: 20091015 |
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| ASS | Succession or assignment of patent right |
Owner name: SHANDONG SWAN WATER ENGINERRING CO.,LTD. Free format text: FORMER OWNER: PANG PENGYUAN Effective date: 20100804 |
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Effective date of registration: 20151012 Address after: Kang Hong Lu 250101 Shandong province Ji'nan city high tech Development Zone No. 1892 Siyuan water industry Patentee after: Pang Pengyuan Address before: 250100, Shandong, Ji'nan province high tech Zone on the eastern side of Feng Lu Patentee before: Shandong Swan Water Engineering Co., Ltd. |
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