CN1295034A - Recovery and treatment method of waste water containing high-concentration benzene dicarboxylic acid - Google Patents
Recovery and treatment method of waste water containing high-concentration benzene dicarboxylic acid Download PDFInfo
- Publication number
- CN1295034A CN1295034A CN 99122367 CN99122367A CN1295034A CN 1295034 A CN1295034 A CN 1295034A CN 99122367 CN99122367 CN 99122367 CN 99122367 A CN99122367 A CN 99122367A CN 1295034 A CN1295034 A CN 1295034A
- Authority
- CN
- China
- Prior art keywords
- waste water
- recovery
- filtrate
- containing high
- dicarboxylic acid
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 16
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 title claims description 22
- 238000000034 method Methods 0.000 title claims description 10
- 238000011084 recovery Methods 0.000 title claims description 5
- KKEYFWRCBNTPAC-UHFFFAOYSA-N benzene-dicarboxylic acid Natural products OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 title claims description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000706 filtrate Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000010865 sewage Substances 0.000 claims abstract description 7
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 125000000129 anionic group Chemical group 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims description 2
- 229920000620 organic polymer Polymers 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims 1
- 235000011116 calcium hydroxide Nutrition 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 238000005189 flocculation Methods 0.000 description 5
- 230000016615 flocculation Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 150000003022 phthalic acids Chemical class 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Waste water with COD value as high as 10000 mg/L is first pH regulated with hydrochloric acid solution to about 3.3, mixed with composite polyaluminum chloride and organic polyacrylamide flucculent while fast stirring, and press-filtered in plate-frame filter to separate filter residue, which is reused as raw material, and filtrate, which is pH regulated with NaOH solution or lime water to 6-7. The filtrate has COD reduced to below 2000 mg/L meaning an over 80 % eliminating rate, and is exhausted for mixing with domestic sewage before biochemical treatment.
Description
The invention belongs to recovery and treatment method of waste water containing high-concentration benzene dicarboxylic acid.
Phthalic acid is the petrochemical industry important source material, its factory effluent belongs to high concentrated organic wastewater, waste water ph is about 4.5, the COD value is up to more than the 10000mg/L, directly processing not only will be wasted a large amount of phthalic acid raw materials, and be difficult to because of its biodegradability is low to handle, can't bear its too high biological load because of secondary biochemical treatment simultaneously and refuse it and directly enter the municipal sewage plant.
But the invention provides the method for wastewater treatment of a kind of economy and efficient recovery phthalic acid raw material, its ultimate principle is to add about acid adjustment pH3.3 a large amount of phthalic acids in the waste water are separated out, be the milkiness shape, under the flocculation agitation condition, add compound polymeric aluminum or anion-polyacrylamide flocculation agent then and make and separate out emulsion and be gathered into closely knit and big flocculation particle, improve its deposition dehydrating performance.Adopt filter press to strengthen solid-liquid separation then, isolated phthalic acid filter residue can directly be reclaimed as raw material, and filtrate is again through transferring pH to mix raising biodegradability, qualified discharge after biochemical treatment with sanitary sewage to neutral back.Concrete operation method is as follows: at first about the pH to 3.3 with concentrated hydrochloric acid accent waste water phthalic acid is separated out, under stirring fast, add compound polymeric aluminum flocculating agent or anionic organic polymer polyacrylamide flocculant then, stir soon to stir slowly again in 1 minute and directly pump into plate-and-frame filter press after 3-5 minute and carry out press filtration, the phthalic acid filter residue directly reclaims, filtrate is adjusted pH to neutral with sodium hydroxide solution or lime slurry again, carry out biochemical treatment, qualified discharge again with after sanitary sewage mixes.Fig. 1 is seen in its technical process.
Below in conjunction with example the present invention is elaborated.
Embodiment one
Get phthalic acid waste water 400mL in beaker, the pH of this water is 4.5, COD is 11000mg/L, transferring pH with the hydrochloric acid of 1+1 is 3.3, there is a large amount of phthalic acids from waste water, to separate out, the anion-polyacrylamide flocculation agent 10mL that under 250 rev/mins stirring velocity, adds 0.2% concentration, stirred soon 1 minute, slowly stirred under 30 rev/mins speed 3 minutes then, through press filtration, filter residue reclaims, the pH of filtrate is 3.5, COD is 2005mg/L, transfers the pH to 6.0 of filtrate and sanitary sewage to be mixed into the aeration tank through Wastewater Treated by Activated Sludge Process with the sodium hydroxide solution of 5% concentration, and water outlet reaches national grade one discharge standard.
Embodiment two
Get phthalic acid waste water 1L in beaker, the pH of this water is 4.3, COD is 12000mg/L, transferring pH with the hydrochloric acid of 1+1 is 3.3, there is a large amount of phthalic acids from waste water, to separate out, the anion-polyacrylamide flocculation agent 18mL that under 250 rev/mins stirring velocity, adds 0.2% concentration, stirred soon 1 minute, slowly stirred under 30 rev/mins speed 3 minutes then, through press filtration, filter residue reclaims, the pH of filtrate is 3.4, COD is 2100mg/L, and the sodium hydroxide solution with 5% transfers pH to 6.0 back of filtrate to be mixed into the aeration tank through Wastewater Treated by Activated Sludge Process with sanitary sewage, and water outlet reaches national grade one discharge standard.
Claims (1)
1, a kind of recovery and treatment method of waste water containing high-concentration benzene dicarboxylic acid is characterized in that this method comprises the steps:
A, at first transfer about the pH to 3.3 of waste water with hydrochloric acid soln and make it to separate out the emulsion throw out
B, under stirring fast, add compound polymeric aluminum or anionic organic polymer polyacrylamide flocculant then, stir soon after 1 minute and stirred slowly again 3-5 minute, through the plate-and-frame filter press press filtration, the phthalic acid decorating film that press filtration goes out can be used as raw material and is reclaimed then.
C, filtrate are adjusted about pH to 6-7 with sodium hydroxide solution or milk of lime and back the mixing with sanitary sewage are carried out biochemical treatment, qualified discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122367 CN1295034A (en) | 1999-11-04 | 1999-11-04 | Recovery and treatment method of waste water containing high-concentration benzene dicarboxylic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122367 CN1295034A (en) | 1999-11-04 | 1999-11-04 | Recovery and treatment method of waste water containing high-concentration benzene dicarboxylic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1295034A true CN1295034A (en) | 2001-05-16 |
Family
ID=5282467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99122367 Pending CN1295034A (en) | 1999-11-04 | 1999-11-04 | Recovery and treatment method of waste water containing high-concentration benzene dicarboxylic acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1295034A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337934C (en) * | 2004-10-29 | 2007-09-19 | 中国石油化工股份有限公司 | High concentration m-phthalic acid production waste water processing method |
| CN101941769A (en) * | 2010-09-10 | 2011-01-12 | 常州大学 | Method for pre-treating alkali PTA wastewater by using combined flocculating agent |
| CN105439330A (en) * | 2016-01-15 | 2016-03-30 | 芜湖林诺环保科技有限公司 | Small sewage treatment device and control method thereof |
| CN108773967A (en) * | 2018-05-11 | 2018-11-09 | 绍兴永丰纺织印染有限公司 | Flocking waste water short route treatment process |
| CN110981027A (en) * | 2019-12-25 | 2020-04-10 | 浙江五水环境工程有限公司 | Treatment equipment and treatment method for phthalic acid wastewater in industrial sewage |
-
1999
- 1999-11-04 CN CN 99122367 patent/CN1295034A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337934C (en) * | 2004-10-29 | 2007-09-19 | 中国石油化工股份有限公司 | High concentration m-phthalic acid production waste water processing method |
| CN101941769A (en) * | 2010-09-10 | 2011-01-12 | 常州大学 | Method for pre-treating alkali PTA wastewater by using combined flocculating agent |
| CN101941769B (en) * | 2010-09-10 | 2012-11-28 | 常州大学 | Method for pre-treating alkali PTA wastewater by using combined flocculating agent |
| CN105439330A (en) * | 2016-01-15 | 2016-03-30 | 芜湖林诺环保科技有限公司 | Small sewage treatment device and control method thereof |
| CN108773967A (en) * | 2018-05-11 | 2018-11-09 | 绍兴永丰纺织印染有限公司 | Flocking waste water short route treatment process |
| CN110981027A (en) * | 2019-12-25 | 2020-04-10 | 浙江五水环境工程有限公司 | Treatment equipment and treatment method for phthalic acid wastewater in industrial sewage |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |