CN106256788B - A kind of group technology handling the organic wastewater of dibutyl phthalate containing high concentration - Google Patents
A kind of group technology handling the organic wastewater of dibutyl phthalate containing high concentration Download PDFInfo
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- CN106256788B CN106256788B CN201510342115.3A CN201510342115A CN106256788B CN 106256788 B CN106256788 B CN 106256788B CN 201510342115 A CN201510342115 A CN 201510342115A CN 106256788 B CN106256788 B CN 106256788B
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Abstract
The present invention relates to industrial waste water treatments, the method for particularly relating to the organic wastewater of dibutyl phthalate containing high concentration (DBP) caused by ozone oxidation, aerobic and activated carbon adsorption group technology processing maleic anhydride hydrogenation method preparation 1,4-butanediol (BDO) in the process.The characteristics of for DBP content high in waste water, waste water is handled by ozonation technology, improve the biodegradability of organic wastewater, treated, and sewage enters aerobic reaction tank progress advanced treating, effectively remove the content of COD in organic wastewater (COD) and dibutyl phthalate (DBP), harm of the waste water for environment is reduced, activated carbon adsorption finally is carried out to waste water, realizes qualified discharge.Combined treatment technology of the present invention, adequately achieves the improvement of waste water, has significant economic value and social value.
Description
Technical field
The present invention relates to industrial waste water treatments, and in particular to utilizes " ozone oxidation+aerobic+activated carbon adsorption "
Group technology processing maleic anhydride hydrogenation method preparation 1,4- butanediol (BDO) during caused by phthalic acid containing high concentration two
The method of the organic wastewater of butyl ester (DBP).
Background technique
Dibutyl phthalate (DBP) is a kind of environmental hormone substance, is widely used in daily life and production,
It is mainly used in the production of plastic plasticizer, pesticide, printing and dyeing, cosmetics etc., has in soil, water body, atmosphere and organism
The presence of DBP.During maleic anhydride hydrogenation method produces 1,4-butanediol (BDO), using DBP as organic solvent, recycling is not
The cis-butenedioic anhydride of reaction realizes product separation, therefore generates the organic wastewater of the DBP containing high concentration.The photodissociation of DBP under field conditions (factors) and
Hydrolysis rate all very slowly, and is easy to be enriched in vivo, causes the functional variation of nervous centralis and peripheral nervous system,
The serious effect for generating mutagenesis and teratogenicity.If DBP sewage is not up to discharge standard, the biology in water body will lead to
Immunity degradation, fecundity reduction etc., have a negative impact to ecological environment.
The processing method of microbial degradation is mainly used for the removal of DBP in sewage at present, but is dropped using microorganism
The method of solution is only applicable to the lower sewage of pollutant concentration, and the sewage of the DBP containing high concentration can generate inhibition to the growth of thallus
Effect, weakens the degradation efficiency of microorganism.Therefore the industrial wastewater of the DBP containing high concentration is not suitable for directly using microbial degradation
Method processing.
Using Ozonation processing DBP sewage be a kind of efficient water treatment technology, by ozone with it is difficult to degrade in water
Organic matter come into full contact with and react, by larger molecular organics chain rupture open loop, be oxidized to small-molecule substance.Ozonation
Major advantage is to be swift in response, and process is simple, does not have secondary pollution problem.In conjunction with active carbon adsorption, it can effectively remove
Dissolved organic matter in sewage, for high-concentration industrial-water, this group technology can effectively improve the biochemical of waste water
Property, the COD (COD) of sewage is reduced, realizes the advanced treating of sewage, makes sewage qualified discharge.
Patent " a kind of method of micro dibutyl phthalate in oxidation removal drinking water " (ZL 02156734.4) mentions
The method for having supplied the dibutyl phthalate in a kind of oxidation removal drinking water, using ozone as oxidant, in static reaction
Phosphate buffer solution is added in device, ozone is passed through in the reactor, makes the dibutyl phthalate in ozone and water
It is reacted, controls pH in 4.3~9.15 ranges, the reaction time is 0~60min, the O-phthalic after processing in drinking water
The removal rate of dibutyl phthalate is 45.4%~90%.Water containing DBP involved in the patent is drinking water, and water sample concentration is
10mg/L, concentration are lower.And for the processing method of the industrial wastewater of the DBP containing high concentration of chemical field, there are no the relevant technologies
Report.
Summary of the invention
In view of the deficienciess of the prior art, the present invention is intended to provide a kind of Industry Waste that the DBP containing high concentration is effectively treated
The method of water handles DBP waste water using ozone oxidation, aerobic and activated carbon adsorption combination technique, reaching for sewage may be implemented
Mark discharge reduces pollution of the organic wastewater to environment.
To achieve the above objectives, the technical solution adopted by the present invention is that:
The water quality characteristic of the organic wastewater of the DBP containing high concentration are as follows: pH be 2.3~3.6, DBP concentration be 310~
490mg/L, COD concentration are 2900~5000mg/L.
As shown in Figure 1, specifically comprising the following steps:
Step 1 adjusts wastewater pH, takes the organic wastewater of the DBP containing high concentration to be placed in container, is added into organic wastewater
Alkali adjusts its pH to 7~8.
The organic wastewater containing DBP after adjusting pH in step 1 is added in ozone reactor by step 2, ozone oxidation,
Ozone is continually fed into, and ozone amount is 6~8mg/min, reacts 1~3h.
It is step 3, aerobic, so that the waste water containing DBP after reacting in step 2 is entered aerobic reaction tank, sludge concentration 3000
~5000mg/L is aerated using micro-pore aeration method, and oxygen content maintains 2~5mg/L, and the reaction time is 10~20h, heavy by two
It is discharged after the sedimentation of pond.
Step 4, activated carbon adsorption, take in step 3 and are discharged after secondary settling tank sedimentation, and it is living that 500~1500mg/L is added thereto
Property charcoal, adsorb 2~4h.
On the basis of above scheme, alkali described in step 1 is sodium hydroxide or potassium hydroxide.
On the basis of above scheme, the waste water containing DBP in step 4 after activated carbon adsorption, water outlet DBP concentration is less than
0.2mg/L, COD are less than 80mg/L, meet discharge standard requirement.
Compared with prior art, the beneficial effects of the present invention are:
1) present invention can change the molecular structure of the dirty Organic substance in water containing DBP by ozonation technology, make organic
The open loop of object macromolecular, scission of link, are oxidized to small organic molecule, to be easier to remove.
2) in the present invention, by the Aerobic Process for Treatment of microorganism, the COD of the waste water containing DBP is greatly lowered, and is realized containing DBP
The advanced treating of waste water.
3) method that the present invention uses activated carbon adsorption further adsorbs the dissolved organic matter in waste water, guarantees water outlet
Water quality reaches discharge standard.
4) waste water containing DBP after ozone Oxidation Treatment, pollutant concentration are greatly reduced, and reduce the poison to microorganism
Property, the impact to Aerobic Process for Treatment system is reduced, treatment effect is made to be significantly improved.
5) organic wastewater of the DBP containing high concentration is after step 1~4 processing, and water outlet DBP concentration is less than 0.2mg/L, and COD is small
In 80mg/L, meet discharge standard requirement.
Detailed description of the invention
The present invention has following attached drawing:
Process flow chart Fig. 1 of the invention.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Use DBP as solvent during BDO separation and purification using maleic anhydride hydrogenation method preparation 1,4-butanediol (BDO)
Unreacted cis-butenedioic anhydride is recycled, produces the organic wastewater largely containing high concentration DBP, the DBP containing high concentration in the process
Organic wastewater water quality characteristic are as follows: it is 310~490mg/L that pH, which is 2.3~3.6, DBP concentration, COD concentration is 2900~
5000mg/L。
Specifically comprise the following steps:
Step 1 adjusts wastewater pH, takes the organic wastewater of the DBP containing high concentration to be placed in container, alkali is added into waste water, adjusts
Save its pH to 7~8.
The organic wastewater containing DBP after adjusting pH in step 1 is added in ozone reactor by step 2, ozone oxidation,
Ozone is continually fed into, and ozone amount is 6~8mg/min, reacts 1~3h.Such as: through step 1, treated that organic wastewater is added to
In ozone reactor, ozone is continually fed into, and ozone amount is 6~8mg/min, reacts 1~3h.
It is step 3, aerobic, so that the waste water containing DBP after reacting in step 2 is entered aerobic reaction tank, sludge concentration 3000
~5000mg/L is aerated using micro-pore aeration method, and oxygen content maintains 2~5mg/L, and the reaction time is 10~20h, heavy by two
It is discharged after the sedimentation of pond.Such as: through step 2, treated that organic wastewater enters aerobic reaction tank, is aerated using micro-pore aeration method, instead
It is 10~20h between seasonable, is discharged after secondary settling tank settles.
Step 4, activated carbon adsorption, take in step 3 and are discharged after secondary settling tank sedimentation, and it is living that 500~1500mg/L is added thereto
Property charcoal, adsorb 2~4h.Such as: secondary clarifier effluent is taken, active carbon is added thereto, adsorbs 2~4h.
On the basis of above scheme, alkali described in step 1 is sodium hydroxide or potassium hydroxide.
On the basis of above scheme, the waste water containing DBP in step 4 after activated carbon adsorption, water outlet DBP concentration is less than
0.2mg/L, COD are less than 80mg/L, meet discharge standard requirement.
The innovative point of the method for the invention is to realize using ozone oxidation, aerobic and activated carbon adsorption group technology
The advanced treating of the waste water containing DBP reduces harm of the waste water for environment, realizes qualified discharge.
The following are several embodiments.
Embodiment 1
The water quality characteristic of the organic wastewater of DBP containing high concentration in the present embodiment are as follows: pH 3.6, DBP content are 350mg/L,
COD concentration is 3200mg/L, and B/C ratio is 0.2
Specifically comprise the following steps:
Step 1 adjusts wastewater pH, takes the waste water of the DBP containing high concentration to be placed in container, sodium hydroxide is added into waste water,
Adjust its pH to 7.
Waste water containing DBP after adjusting pH in step 1 is added in ozone reactor, ozone amount by step 2, ozone oxidation
For 7mg/min, 3h is reacted.
It is step 3, aerobic, the DBP waste water after reacting in step 2 is entered into aerobic reaction tank, sludge concentration 5000mg/L,
It is aerated using micro-pore aeration method, oxygen content maintains 3mg/L, and reaction time 15h is discharged after secondary settling tank settles.
Step 4, activated carbon adsorption take in step 3 and are discharged after secondary settling tank sedimentation, 1000mg/L active carbon is added thereto,
Adsorb 4h.
After measured, the waste water B/C after ozone oxidation is 0.3, is significantly improved than raw water, by ozone oxidation+aerobic+activity
Group technology treated the DBP waste water of charcoal absorption, effluent COD concentration 58mg/L, DBP concentration are 0.11mg/L.
Embodiment 2
The water quality characteristic of the organic wastewater of DBP containing high concentration in the present embodiment are as follows: pH 2.5, DBP content are 310mg/L,
COD concentration is 4000mg/L, and B/C ratio is 0.21.
Specifically comprise the following steps:
Step 1 adjusts wastewater pH, takes the waste water of the DBP containing high concentration to be placed in container, sodium hydroxide is added into waste water,
Adjust its pH to 8.
Waste water containing DBP after adjusting pH in step 1 is added in ozone reactor, ozone amount by step 2, ozone oxidation
For 7mg/min, 1h is reacted.
It is step 3, aerobic, the DBP waste water after reacting in step 2 is entered into aerobic reaction tank, sludge concentration 3500mg/L,
It is aerated using micro-pore aeration method, oxygen content maintains 2mg/L, and reaction time 17h is discharged after secondary settling tank settles.
Step 4, activated carbon adsorption take in step 3 and are discharged after secondary settling tank sedimentation, 1000mg/L active carbon is added thereto,
Adsorb 2h.
After measured, the waste water B/C after ozone oxidation is 0.32, is significantly improved than raw water ,+aerobic+by ozone oxidation to live
Property charcoal absorption group technology treated DBP waste water, effluent COD concentration 69mg/L, DBP concentration is 0.19mg/L.
Embodiment 3
The water quality characteristic of the organic wastewater of DBP containing high concentration in the present embodiment are as follows: pH 2.3, DBP content are 490mg/L,
COD concentration is 5000mg/L, and B/C ratio is 0.17.
Specifically comprise the following steps:
Step 1 adjusts wastewater pH, takes the waste water of the DBP containing high concentration to be placed in container, potassium hydroxide is added into waste water,
Adjust its pH to 7.
Waste water containing DBP after adjusting pH in step 1 is added in ozone reactor, ozone amount by step 2, ozone oxidation
For 8mg/min, 2h is reacted.
It is step 3, aerobic, the DBP waste water after reacting in step 2 is entered into aerobic reaction tank, sludge concentration 4500mg/L,
It is aerated using micro-pore aeration method, oxygen content maintains 4mg/L, and reaction time 20h is discharged after secondary settling tank settles.
Step 4, activated carbon adsorption take in step 3 and are discharged after secondary settling tank sedimentation, 1000mg/L active carbon is added thereto,
Adsorb 3h.
After measured, the waste water B/C after ozone oxidation is 0.28, is significantly improved than raw water ,+aerobic+by ozone oxidation to live
Property charcoal absorption group technology treated DBP waste water, effluent COD concentration 60mg/L, DBP concentration is 0.12mg/L.
Embodiment 4
The water quality characteristic of the organic wastewater of DBP containing high concentration in the present embodiment are as follows: pH 2.9, DBP content are 400mg/L,
COD concentration is 4200mg/L, and B/C ratio is 0.24.
Specifically comprise the following steps:
Step 1 adjusts wastewater pH, takes the waste water of the DBP containing high concentration to be placed in container, sodium hydroxide is added into waste water,
Adjust its pH to 8.
Waste water containing DBP after adjusting pH in step 1 is added in ozone reactor, ozone amount by step 2, ozone oxidation
For 6mg/min, 3h is reacted.
It is step 3, aerobic, the DBP waste water after reacting in step 2 is entered into aerobic reaction tank, sludge concentration 4000mg/L,
It is aerated using micro-pore aeration method, oxygen content maintains 5mg/L, and reaction time 10h is discharged after secondary settling tank settles.
Step 4, activated carbon adsorption take in step 3 and are discharged after secondary settling tank sedimentation, 1500mg/L active carbon is added thereto,
Adsorb 3h.
After measured, the waste water B/C after ozone oxidation is 0.33, is significantly improved than raw water ,+aerobic+by ozone oxidation to live
Property charcoal absorption group technology treated DBP waste water, effluent COD concentration 65mg/L, DBP concentration is 0.16mg/L.
Embodiment 5
The water quality characteristic of the organic wastewater of DBP containing high concentration in the present embodiment are as follows: pH 3.2, DBP content are 320mg/L,
COD concentration is 2900mg/L, and B/C ratio is 0.22.
Specifically comprise the following steps:
Step 1 adjusts wastewater pH, takes the waste water of the DBP containing high concentration to be placed in container, potassium hydroxide is added into waste water,
Adjust its pH to 7.
Waste water containing DBP after adjusting pH in step 1 is added in ozone reactor, ozone amount by step 2, ozone oxidation
For 7mg/min, 1h is reacted.
It is step 3, aerobic, the DBP waste water after reacting in step 2 is entered into aerobic reaction tank, sludge concentration 3000mg/L,
It is aerated using micro-pore aeration method, oxygen content maintains 4mg/L, and reaction time 12h is discharged after secondary settling tank settles.
Step 4, activated carbon adsorption take in step 3 and are discharged after secondary settling tank sedimentation, 500mg/L active carbon is added thereto, inhale
Attached 2h.
After measured, the waste water B/C after ozone oxidation is 0.31, is significantly improved than raw water ,+aerobic+by ozone oxidation to live
Property charcoal absorption group technology treated DBP waste water, effluent COD concentration 73mg/L, DBP concentration is 0.19mg/L.
Comparative example 1
The water quality characteristic of the organic wastewater of DBP containing high concentration in this comparative example are as follows: pH 3.3, DBP content are 360mg/L,
COD concentration is 4100mg/L, and B/C ratio is 0.24.
Specifically comprise the following steps:
Step 1 adjusts wastewater pH, takes the waste water of the DBP containing high concentration to be placed in container, sodium hydroxide is added into waste water,
Adjust its pH to 7.
Waste water containing DBP after adjusting pH in step 1 is added in ozone reactor, ozone amount by step 2, ozone oxidation
For 7mg/min, 3h is reacted.
It is step 3, aerobic, the DBP waste water after reacting in step 2 is entered into aerobic reaction tank, sludge concentration 5000mg/L,
It is aerated using micro-pore aeration method, oxygen content maintains 3mg/L, and reaction time 15h is discharged after secondary settling tank settles.
DBP waste water after ozone oxidation+aerobic combination process, effluent COD concentration 191mg/L, DBP concentration are
0.8mg/L.Compared with Example 1, it is handled without activated carbon adsorption, DBP wastewater effluent DBP concentration is greater than 0.2mg/L, COD
Greater than 80mg/L, qualified discharge cannot achieve.
Comparative example 2
The water quality characteristic of the organic wastewater of DBP containing high concentration in the present embodiment are as follows: pH 2.3, DBP content are 390mg/L,
COD concentration is 4100mg/L, and B/C ratio is 0.21.
Specifically comprise the following steps:
Step 1 adjusts wastewater pH, takes the waste water of the DBP containing high concentration to be placed in container, potassium hydroxide is added into waste water,
Adjust its pH to 7.
Waste water containing DBP after adjusting pH in step 1 is added in ozone reactor, ozone amount by step 2, ozone oxidation
For 8mg/min, 2h is reacted.
Step 3, activated carbon adsorption take ozone oxidation in step 2 to be discharged, and 1000mg/L active carbon, absorption are added thereto
3h。
Through ozone oxidation+activated carbon adsorption group technology treated DBP waste water, effluent COD concentration 410mg/L, DBP
Concentration is 30mg/L.Compared with Example 3, without Aerobic Process for Treatment, DBP wastewater effluent DBP concentration is greater than 0.2mg/L, and COD is big
In 80mg/L, qualified discharge cannot achieve.
The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (2)
1. a kind of group technology for handling the organic wastewater of dibutyl phthalate containing high concentration, it is characterised in that including walking as follows
It is rapid:
Step 1 adjusts wastewater pH, takes the organic wastewater of the DBP containing high concentration to be placed in container, alkali is added into organic wastewater, adjusts
Save its pH to 7~8；
The organic wastewater containing DBP after adjusting pH in step 1 is added in ozone reactor, ozone by step 2, ozone oxidation
It is continually fed into, ozone amount is 6~8mg/min, reacts 1~3h；
It is step 3, aerobic, so that the waste water containing DBP after reacting in step 2 is entered aerobic reaction tank, is aerated using micro-pore aeration method,
Reaction time is 10~20h, is discharged after secondary settling tank settles；
Step 4, activated carbon adsorption take in step 3 and are discharged after secondary settling tank sedimentation, active carbon is added thereto, adsorb 2~4h；
The water quality characteristic of the organic wastewater of the DBP containing high concentration described in step 1 are as follows: pH is that 2.3~3.6, DBP concentration is 310
~490mg/L, COD concentration are 2900~5000mg/L；
Sludge concentration is 3000~5000mg/L, oxygen when being aerated using micro-pore aeration method in waste water containing DBP described in step 3
Content maintains 2~5mg/L；
Active carbon described in step 4 is 500~1500mg/L；
The waste water containing DBP in step 4 after activated carbon adsorption, water outlet DBP concentration are less than 0.2mg/L, and COD is less than 80mg/L,
Meet discharge standard requirement.
2. the group technology of the processing organic wastewater of dibutyl phthalate containing high concentration as described in claim 1, feature
Be: alkali described in step 1 is sodium hydroxide or potassium hydroxide.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693569A (en) * | 2009-10-16 | 2010-04-14 | 上海联喆控制设备有限公司 | Device for catalyzing and oxidating ozone effectively |
| CN102329041A (en) * | 2011-06-23 | 2012-01-25 | 环境保护部华南环境科学研究所 | Method for treating naphthalene-containing wastewater by using ozone-membrane bioreactor (MBR) combined process |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693569A (en) * | 2009-10-16 | 2010-04-14 | 上海联喆控制设备有限公司 | Device for catalyzing and oxidating ozone effectively |
| CN102329041A (en) * | 2011-06-23 | 2012-01-25 | 环境保护部华南环境科学研究所 | Method for treating naphthalene-containing wastewater by using ozone-membrane bioreactor (MBR) combined process |
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