CN103011521A - Biological treatment method and biological treatment apparatus for strongly alkaline printing and dyeing wastewater - Google Patents
Biological treatment method and biological treatment apparatus for strongly alkaline printing and dyeing wastewater Download PDFInfo
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- CN103011521A CN103011521A CN2012105693708A CN201210569370A CN103011521A CN 103011521 A CN103011521 A CN 103011521A CN 2012105693708 A CN2012105693708 A CN 2012105693708A CN 201210569370 A CN201210569370 A CN 201210569370A CN 103011521 A CN103011521 A CN 103011521A
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Abstract
The invention relates to a biological treatment method and a biological treatment apparatus for strongly alkaline printing and dyeing wastewater. The biological treatment method comprises the following steps that 1) the strongly alkaline printing and dyeing wastewater is pumped in an adjusting tank and kept for one day in the adjusting tank; 2) effluent discharged from the adjusting tank is introduced into a selection tank and kept for one day 3 hours in the selection tank; 3) a mud-water mixed liquid of the selection tank flows into an aeration tank and kept for 24-48 hours in the aeration tank; and 4) an aerated mixed liquid flows into a final sedimentation tank, effluent is discharged out after the mud and water are separated in the final sedimentation tank, and the mud in the final sedimentation tank is returned to the selection tank and the aeration tank through a mud return pipe or is discharged out through a mud discharging pipe. The biological treatment method and the biological treatment apparatus for strongly alkaline printing and dyeing wastewater has the advantages of good treatment effect, low cost, capability of reducing secondary pollutions, no need of adjusting a pH value, etc.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment and device, be specifically related to a kind of bioremediation and device of strong basicity dyeing waste water, belong to the technology for treating industrial waste water field.
Background technology
In general, biological process is disposed of sewage has strict requirement to pH, should be controlled between 6 ~ 9, for this reason, for guaranteeing the normal operation of biochemical treatment, usually needs acid adding adjusting in water inlet.But adding a large amount of acid has not only increased processing cost, has also increased the salinity of water body; In addition, the acid adding equipment claimed is investment and routine maintenance greatly, and storage strong acid also is very large potential safety hazard.Simultaneously, the strong acid that mostly is owing to adding such as sulfuric acid, also has influence on operator's safety and Health.
Studies show that some microorganism can survive in extreme alkaline environment, mainly is that intracellular pH is neutral because their cytolemma can guarantee that extraneous pH is in the situation of 10-13.Usually can be at pH〉microorganism that survives under 9 the condition is referred to as halophile.In past 20 years, there has been a large amount of halophiles to begin to be applied in the industry.Therefore, the how to do well technological design, preferred halophile can directly be processed the strong basicity dyeing waste water, and tool is of great significance.
Therefore, for solving the problems of the technologies described above, necessaryly provide a kind of bioremediation and device with structure improved strong basicity dyeing waste water, to overcome described defective of the prior art.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind for the treatment of effect good, cost is low, the bioremediation that can reduce secondary pollution and need not to regulate the strong basicity dyeing waste water of pH value.
Another object of the present invention is to provide a kind of biological treatment device of strong basicity dyeing waste water.
For realizing above-mentioned the first purpose, the technical scheme that the present invention takes is: a kind of bioremediation of strong basicity dyeing waste water, and it comprises following processing step: 1), the strong basicity dyeing waste water is pumped in the equalizing tank, and stopped one day in equalizing tank; 2), the equalizing tank water outlet is sent into and is selected in the pond, and stops 3 hours in selecting the pond; 3), select the pond muddy water mixed solution to flow in the aeration tank, and in the aeration tank, stopped 24 ~ 48 hours; 4), the aeration mixed solution flows into final deposition pool, and water outlet effluxes after final deposition pool carries out mud-water separation, and mud is again sent into by mud return line and selected pond and aeration tank internal reflux in the final deposition pool, perhaps discharges by the mud vent pipe.
The bioremediation of strong basicity dyeing waste water of the present invention further is: the pH of described strong basicity dyeing waste water is between 10 ~ 12.5; COD
CrConcentration is between 1000 ~ 3000mg/L.
For realizing above-mentioned the second purpose, the technical scheme that the present invention takes is: a kind of biological treatment device of strong basicity dyeing waste water, and it comprises equalizing tank, selects pond, aeration tank and final deposition pool; Wherein, described equalizing tank, select pond, aeration tank to be connected with final deposition pool to connect and form an integrated form treatment unit; The bottom of described final deposition pool is provided with a mud return line and a mud vent pipe.
The bioremediation of strong basicity dyeing waste water of the present invention and device further are set to: be connected with an air access tube on described aeration tank.
The bioremediation of strong basicity dyeing waste water of the present invention and device also are set to: described selection pond is anoxic bioselection pond.
Compared with prior art, the present invention has following beneficial effect: the bioremediation of strong basicity dyeing waste water of the present invention and device have that treatment effect is good, and cost is low, can reduce secondary pollution and need not to regulate the plurality of advantages such as pH value.
Description of drawings
Fig. 1 is the process flow sheet of the bioremediation of strong basicity dyeing waste water of the present invention.
Embodiment
See also shown in the Figure of description 1, the present invention is a kind of bioremediation and device of strong basicity dyeing waste water, and it is comprised of several parts such as equalizing tank 1, selection pond 2, aeration tank 3 and final deposition pools 4.
Wherein, described equalizing tank 1, select pond 2, aeration tank 3 to be connected with final deposition pool to connect successively and form an integrated form treatment unit.
Described selection pond 2 is anoxic bioselection pond 2.On described aeration tank 3, be connected with an air access tube 31, pass into air by this air access tube 31.The bottom of described final deposition pool 4 is provided with a mud return line 41 and a mud vent pipe 42.
The bioremediation of strong basicity dyeing waste water of the present invention and the principle of device are as follows: in aeration tank 3, the organism of waste water produces carbonic acid gas in the decomposition course of alkaline-resisting microorganism, and carbon dioxide solubility becomes weak acid behind water, can neutralize with highly basic, and concrete reaction formula is as follows:
Organism+O
2→ CO
2+ H
2O;
CO
2 + OH
-→ HCO
3 -；
HCO
3 -+ OH
-→CO
3 2-+H
2O。
After the aerobe processing, pH of mixed meets discharging standards between 7-9.
Adopt the method for above-mentioned biological treatment device processing strong basicity dyeing waste water as follows:
1), the strong basicity dyeing waste water is pumped in the equalizing tank 1, and equalizing tank 1 interior stop one day.Wherein, the pH of described strong basicity dyeing waste water is between 10 ~ 11, even between 10 ~ 12.5; COD
CrConcentration is between 1000 ~ 3000mg/L.The pH of strong basicity dyeing waste water and being proportionate property of COD, i.e. COD
CrHigher, pH is also higher.
2), equalizing tank 1 water outlet is sent into and is selected in the pond 2, and is selecting pond 2 interior stops 3 hours.Wherein, the purpose in described selection pond 2 is to make microorganism obtain screening through high alkalinity organic waste water, and makes mud obtain decrement, and alkaline hydrolysis then occurs the unconformable microorganism of part, as the nutrition of other microorganism, also can reach the purpose of mud decrement.
3), select pond 2 muddy water mixed solutions to flow in the aeration tank 3, and the 3 interior stops 24 ~ 48 hours in the aeration tank.Wherein, complete hybrid activated sludge process or oxidation ditch are adopted in described aeration tank 3, and namely the strong basicity dyeing waste water is wanted and can be mixed with aeration tank 3 interior mud rapidly, to reach the purpose of dilution.Described aeration tank 3 interior sewage hydraulic detention times should be according to influent COD
CrConcentration and water outlet require and decide, and general control was at 24 ~ 48 hours.
4), the aeration mixed solution flows into final deposition pool 4, and water outlet effluxes after final deposition pool 4 carries out mud-water separation, and final deposition pool 4 interior mud are again sent into by mud return line 41 and selected pond 2 and aeration tank 3 internal reflux, perhaps discharge by mud vent pipe 42.
For the bioremediation of verifying strong basicity dyeing waste water of the present invention and the validity of device, the applicant has carried out two experiments.
Experiment one: the test waste water of this experiment is the dyeing waste water of certain printing and dyeing mill, and waste water directly enters in the equalizing tank, and the water-quality guideline when entering treatment system is as follows: COD
CrBe 2000mg/L, 1000 times of colourities, the engineering water yield are 5000m
3/ d, temperature is 20 ~ 35 ℃, and aeration gas-water ratio: 20:1 in the aeration tank, pH are 12, and the residence time of equalizing tank is about one day, and selecting the residence time in pond is 3h, the residence time of aeration tank is 24h; The effluent quality index of system is as follows after processing: COD
CrBe 150 ~ 200mg/L, 30 ~ 50 times of colourities, pH is 7 ~ 8.
Experiment two: the test waste water of this experiment is the dyeing waste water of certain printing and dyeing mill, and waste water enters in the equalizing tank through after the simple process of printing and dyeing mill, and the water-quality guideline when entering treatment system is as follows: COD
CrBe 2500mg/L, 500 times of colourities, pH is 11, the engineering water yield is 3000m
3/ d, temperature is 20 ~ 40 ℃, aeration gas-water ratio: 25:1 in the aeration tank, the residence time of equalizing tank is about one day, and selecting the residence time in pond is 3h, and the residence time of aeration tank is 36h; The effluent quality index of system is as follows after processing: COD
CrBe 100 ~ 150mg/L, 30 ~ 50 times of colourities, pH is 7.5 ~ 8.5.
Above-mentioned experiment can be carried out sewage disposal on the basis of not regulating wastewater pH, reaches easy and simple to handle, the purpose of cost.This experiment also has organism (COD
Cr) and the clearance of colourity higher, can efficiently remove the pollutent in the waste water, reach and purify water, reduce the characteristics of effluent index.
Above embodiment only is the preferred embodiment of this creation, not in order to limiting this creation, all in this creation spirit and principle within make any modification, be equal to replacement, improvement etc., all should be included within the protection domain of this creation.
Claims (5)
1. the bioremediation of a strong basicity dyeing waste water is characterized in that: comprise following processing step:
1), the strong basicity dyeing waste water is pumped in the equalizing tank, and in equalizing tank, stopped one day;
2), the equalizing tank water outlet is sent into and is selected in the pond, and stops 3 hours in selecting the pond;
3), select the pond muddy water mixed solution to flow in the aeration tank, and in the aeration tank, stopped 24 ~ 48 hours;
4), the aeration mixed solution flows into final deposition pool, and water outlet effluxes after final deposition pool carries out mud-water separation, and mud is again sent into by mud return line and selected pond and aeration tank internal reflux in the final deposition pool, perhaps discharges by the mud vent pipe.
2. the bioremediation of strong basicity dyeing waste water as claimed in claim 1, it is characterized in that: the pH of described strong basicity dyeing waste water is between 10 ~ 12.5; COD
CrConcentration is between 1000 ~ 3000mg/L.
3. the biological treatment device of a strong basicity dyeing waste water is characterized in that: comprise equalizing tank, select pond, aeration tank and final deposition pool; Wherein, described equalizing tank, select pond, aeration tank to be connected with final deposition pool to connect and form an integrated form treatment unit; The bottom of described final deposition pool is provided with a mud return line and a mud vent pipe.
4. the biological treatment device of strong basicity dyeing waste water as claimed in claim 3 is characterized in that: be connected with an air access tube on described aeration tank.
5. the biological treatment device of strong basicity dyeing waste water as claimed in claim 4, it is characterized in that: described selection pond is anoxic bioselection pond.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105693708A CN103011521A (en) | 2012-12-25 | 2012-12-25 | Biological treatment method and biological treatment apparatus for strongly alkaline printing and dyeing wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105693708A CN103011521A (en) | 2012-12-25 | 2012-12-25 | Biological treatment method and biological treatment apparatus for strongly alkaline printing and dyeing wastewater |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101659494A (en) * | 2008-08-27 | 2010-03-03 | 郑明兰 | Method for treating sugar production wastewater |
| CN101723557A (en) * | 2009-12-09 | 2010-06-09 | 河南师范大学 | Micro-organism treatment process for printing and dyeing waste water |
| CN102515427A (en) * | 2011-12-07 | 2012-06-27 | 浙江省环境保护科学设计研究院 | Printing and dyeing waste water treatment system and process with low yield of sludge |
| CN202400930U (en) * | 2011-12-07 | 2012-08-29 | 浙江省环境保护科学设计研究院 | Low-sludge-yield printing and dyeing wastewater treatment system |
| CN102674640A (en) * | 2012-06-06 | 2012-09-19 | 广西大学 | Washing bleaching and dyeing wastewater treatment method |
-
2012
- 2012-12-25 CN CN2012105693708A patent/CN103011521A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101659494A (en) * | 2008-08-27 | 2010-03-03 | 郑明兰 | Method for treating sugar production wastewater |
| CN101723557A (en) * | 2009-12-09 | 2010-06-09 | 河南师范大学 | Micro-organism treatment process for printing and dyeing waste water |
| CN102515427A (en) * | 2011-12-07 | 2012-06-27 | 浙江省环境保护科学设计研究院 | Printing and dyeing waste water treatment system and process with low yield of sludge |
| CN202400930U (en) * | 2011-12-07 | 2012-08-29 | 浙江省环境保护科学设计研究院 | Low-sludge-yield printing and dyeing wastewater treatment system |
| CN102674640A (en) * | 2012-06-06 | 2012-09-19 | 广西大学 | Washing bleaching and dyeing wastewater treatment method |
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Application publication date: 20130403 |