CN101519267A - Combined treatment process for high-concentration organic waste water - Google Patents
Combined treatment process for high-concentration organic waste water Download PDFInfo
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- CN101519267A CN101519267A CN200910131316A CN200910131316A CN101519267A CN 101519267 A CN101519267 A CN 101519267A CN 200910131316 A CN200910131316 A CN 200910131316A CN 200910131316 A CN200910131316 A CN 200910131316A CN 101519267 A CN101519267 A CN 101519267A
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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
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Abstract
Aiming at the difference of biodegradable properties of a great amount of organisms in high-concentration organic waste water at present and according to the current situation of the treatment process of high-concentration organic waste water, the invention provides a combined treatment process for high-concentration organic waste water, which has high waste water removing efficiency and wide application range and combines a micro aerobic bacteria treatment process, a chemical oxidation process and an activated sludge process. In the combined treatment process, the micro aerobic bacteria treatment process is firstly adopted to remove most of biodegradable organisms so as to ensure that the object treated by the chemical oxidation process is basically nonbiodegradable organisms; the chemical oxidation process is adopted to improve the biodegradability of the waste water so as to lay a foundation for the subsequent biological treatment; and at last the activated sludge process is used as post treatment so as to ensure the quality of outlet water. The process can be directly applied to different types of high-concentration organic waste water containing high content of oil, sulfur and ammonia, and has the advantages of high removing efficiency, low sludge output and wide application range.
Description
Technical field
The invention belongs to environmental engineering and waste water treatment engineering field, relate in particular to the combination process of a kind of " micro-aerobic bacteria facture+chemical oxidization method+activated sludge process ".This combination process is widely used in comprising dissimilar high concentrated organic wastewaters such as fermentation class trade effluent, sugar production wastewater, dyeing waste water, food processing wastewater, percolate from garbage filling field.
Background technology
Along with the rapid growth of China's economy, the large amount of sewage discharging causes water pollution problems more and more serious.It is predicted, current China trade effluent accounts for more than 70% of total wastewater flow rate, the class of wherein fermenting trade effluent is (as citric acid water, brewing wastewater, antibiotic waste water etc.), sugar production wastewater, dyeing waste water, food processing wastewater (as salad oil processing waste water etc.), percolate from garbage filling field etc. belong to high concentrated organic wastewater, it is characterized by very high concentrations, the COD value generally reaches tens thousand of even hundreds of thousands of mg/L, contained organism kinds is various, except that a large amount of biodegradable materials, may comprise in a large number that also biodegradable material is not (as fermentation class resistates, synthetic detergent, organochlorine pesticide, polychlorobiphenyl, microbiotic, the internal secretion Interferon, rabbit, organophosphorus pesticide, tensio-active agent, organic dye or the like), these hard-degraded substance biodegradabilities are poor, be not easy to be degraded by Institute of Micro-biology, even manyly also has a bigger bio-toxicity, very big though content is low to environment and human health influence, in case causing environment, the discharging meeting has a strong impact on.
At present, difficult degradation or the high concentrated organic wastewater that contains toxic organic compound can adopt single chemical oxidization method to handle.As application number is 200510100249.0, name is called a kind of method for the treatment of polyvinyl alcohol waste water by catalytic oxidizing process, publication number is the patent of invention of CN1944281A, it adopts the Fenton agent treated through pretreated poly-alcohol wastewater, reaction is carried out at normal temperatures, speed is fast, effective, and for example application number is 02144567.2, name is called the method that a kind of Catalytic Wet Oxidation is handled high phenolic wastewater, has the patent of invention that publication number is CN1498861A, employing has the precious metal and the rare-earth metal catalyst of high catalytic activity, improve the Catalytic Wet Oxidation reaction efficiency greatly, improve wastewater biodegradability, application number is 200510026670.1 for another example, name is called a kind of method of catalytic oxidation treatment of high concentration waste water, publication number is the patent of invention of CN1876577A, first before the catalysis through in the catalyzed oxidation tower, participating in suitable air and waste water after the dioxide peroxide oxidation again, solid catalyst constitutes triphase catalytic oxidation, be used to handle high chroma, the high concentrated organic wastewater of supersalinity, easy and simple to handle, non-secondary pollution, no dregs generate.Application number is 200410014620.7, name is called the pretreatment process of high density, indegradable industrial effluent, publication number is the patent of invention of CN1680199A, at pH is that 2～4 o'clock employing chemical oxidations, photodissociation oxidation and little electrolytic decomposition are handled, at pH is 6～7 o'clock dissolved air flotation scum silica frost, at pH is 8～9 o'clock coagulation precipitation separations, can improve the wastewater biological degradability greatly.Though directly adopt chemical oxidation can obtain the ideal treatment effect, have the higher deficiency of processing cost, thereby influenced the widespread use of chemical oxidization method.
For reducing running cost, adopt chemical oxidization method more and more to come into one's own as the combination process of aftertreatment as pre-treatment, biological process.As application number is 200410040058.5, name is called the method for ultrasonically catalyzing oxidation-biological treatment organic wastewater with difficult degradation thereby, publication number is the patent of invention of CN1594146A, application number is 200410022411.7, name is called ozone+biochemical process processing and contains Sweet natural gas frostproofer waster water process, publication number is the patent of invention of CN1689992A, application number is 200310122764.X, name is called organic wastewater treatment process, publication number is the patent of invention of CN1631818A, application number is 02136127.4, name is called the method and the device of catalyzed oxidation-biochemical combination treatment organic wastewater with difficult degradation thereby, publication number is the patent of invention of CN1468816A, application number is 200610041550.3, name is called the tetravalent manganese compound oxidation, chemical precipitation, the coking waste water treatment method of biochemical associating, publication number is the patent of invention of CN1927744A, application number is 03146091.7, name is called a kind of integrated technology and device that oil-field well-drilling waste water is handled that be used for, publication number is the patent of invention of CN1569695A, application number is 200610034589.2, name is called the multiple combined technique that high concentration hard-degraded organic waste water is handled, publication number is the patent of invention of CN101041531A, and application number is 03131943.2, name is called high density organic nitrogen compound Waste Water Treatment and treatment process thereof, publication number is the patent of invention of CN1480412A, they all adopt chemical oxidization method (to comprise ultrasonic method as pre-treatment, the ozone method, tetravalence manganese method, iron-carbon micro-electrolysis, Fenton oxidation style etc.), and ensureing effluent quality as aftertreatment with aerobic or anaerobic process, more single chemical oxidization method has reduced running cost.Yet, still there is the higher defective of processing cost in this combination process when handling many high concentrated organic wastewaters, this mainly is because many high concentrated organic wastewaters contain a large amount of biodegradable materials toward contact except that containing hardly degraded organic substance, and because oxygenant can not be realized selective oxidation, when adopting chemical oxidization method as pre-treatment except that hardly degraded organic substance is oxidized, a large amount of oxygenants are consumed on the biodegradable material, thereby make the oxidant consumption amount well beyond actual requirement.
This feature at high concentrated organic wastewater, the employing Biological Pretreatment fully removes biodegradable organic and then the most rational combination process of design is beyond doubt handled in employing " chemical oxidization method+biological process ", and it can reduce the running cost of chemical oxidation and whole technology to greatest extent.As application number is 200310103223.2, name is called a kind of treatment process of high concentrated organic wastewater, publication number is that the patent of invention of CN1611457A has adopted " anaerobic biofilter-Fenton reagent oxidation one contact oxidation method " combination process, it fully removes biodegradable organic by anaerobic process, making the chemical oxidization method process object is refractory organic basically, and chemical oxidization method is mainly used in the raising biodegradability, for subsequent biological treatment lays the foundation, thereby has minimum chemical oxidation cost and technology running cost.But, anaerobic process still has some weak point during as pre-treatment, for example, anaerobion is low to the affinity of oil content, high concentration sulfate anaerobism product has higher toxicity to methanogen, or the like, the limitation of anaerobic process has determined the application of " anaerobic process+chemical oxidization method+biological treatment " combination process in high concentrated organic wastewater is handled to have certain limitation.
In fact, except that anaerobic process, many is that the biologic treating technique of process object is developed already with the high concentrated organic wastewater, wherein new bio treatment technology such as yeast facture and micro-aerobic bacteria facture can both directly apply to high-sulfur or high oil type high concentrated organic wastewater, obtained treatment effect preferably, can be used as the substitute technology of anaerobic process in some occasion, range of application is wider.As application number is 200510130318.2, name is called a kind of multistage yeast hypoxemia treatment process and method of handling high concentrated organic wastewater, publication number is the patent of invention of CN1807285A, application number is 200510130317.8, name is called Yeast low oxygen SBR process and the device at high concentrated organic wastewater, publication number is the patent of invention of CN1807284A, application number is 200510123100.4, name is called the method for little oxygen hydrolysis acidifying pre-treatment organic wastewater containing sulfate of high concentration, publication number is the patent of invention of CN1803670A, and application number is 200710106974.8, name is called micro-aerobic bacteria treatment method for high concentrated organic wastewater, and publication number is patent of invention of CN101058464A or the like.Wherein micro-aerobic bacteria treatment method because of process object (to remove organism, the nitre nitrogen or the nitrite nitrogen of no significant quantity in the target waste water, microorganism only absorbs ammonia nitrogen and is used for the synthetic cell material and can not utilizes nitre nitrogen or nitrite nitrogen) difference is different from the oxygen biological treatment of holding concurrently (to remove nitre nitrogen or nitrite nitrogen, must exist the nitre nitrogen of significant quantity or nitrite nitrogen and organism that the oxygen denitrification of holding concurrently could take place in the target waste water simultaneously, as application number is 200410034973.3, name is called a kind of efficient wastewater treating process, publication number is the CN1689993A patent of invention), it is to handle main body with the micro-aerobic bacteria, microbial metabolism is complete under little aerobic condition, can be as the biodegradable organic in the thorough removal high concentrated organic wastewater of aerobic treatment method, the aeration cost be aerobic condition about 5% in addition lower, saved running cost, sludge yield is lower, and to compare the scope of application wider with anaerobic technique.
By the foregoing invention patent as can be seen, current biological wastewater treatment technology distance costs one effect when handling high concentrated organic wastewater is taken into account, adapt to wide requirement and also have certain distance, develop a kind of novel combined treatment process for high-concentration organic waste water, and make it efficient, economical, adapt to dissimilar waste water widely and have very realistic meanings.
Summary of the invention
The present invention is directed in the current high concentrated organic wastewater organic biodegradability this characteristics that differ greatly, and, provide a kind of more efficient, economical and adapt to wide high concentrated organic wastewater " micro-aerobic bacteria facture+chemical oxidization method+activated sludge process " combined treatment process according to the present situation of present high concentrated organic wastewater treatment technology.This technology comprises following three phases: at first adopt the micro-aerobic bacteria facture to remove most biodegradable organics under little aerobic condition, making the chemical oxidization method process object is refractory organic basically; Adopt the biodegradability of chemical oxidization method raising waste water subsequently, for subsequent biological treatment lays the foundation; Adopt activated sludge process to ensure effluent quality at last as aftertreatment.This technology is carried out the stage degraded at the difference of the biodegradable degree of organism in the high concentrated organic wastewater, and the micro-aerobic bacteria facture is applied to the pre-treatment of combination process, farthest reduced the running cost of chemical oxidization method, the design of whole combination process is tending towards rationally, has the efficient of removal height, advantage of wide range of application.
The invention is characterized in that the stage that described a kind of combined treatment process for high-concentration organic waste water is carried out high-enriched organics at organic biodegradability difference in the high concentrated organic wastewater removes, most biodegradable organics are at first removed by the micro-aerobic bacteria facture of low operating cost in the waste water, make that residual organic composition mainly is a refractory organic in the fs water outlet, adopt suitable chemical oxidization method (as ultrasonic method according to the waste water quality characteristics then, the ozone method, Fenton oxidation style etc.) biodegradability of raising waste water, and adopt activated sludge process to ensure effluent quality as aftertreatment, saved the running cost of chemical oxidation to greatest extent, satisfied high concentrated organic wastewater handle in cost-effect take into account, adapt to wide requirement.
Feature of the present invention is that also described a kind of combined treatment process for high-concentration organic waste water adopts the micro-aerobic bacteria facture as pre-treatment, under little aerobic condition, utilize the selectivity advantage of micro-aerobic bacteria to carry out the TCA circulation, the efficient biological easily biodegradable organics that decomposes in the high concentrated organic wastewater, metabolic process is complete, thorough, and the BOD clearance can reach more than 95%.
The object of the present invention is to provide a kind of applied range, remove the high high concentrated organic wastewater treatment process of efficient, to solve the deficiency of existing technology.Patent compared with prior art of the present invention has the following advantages:
(1) technological design is reasonable, and working cost is low: the stage of carrying out high-enriched organics at organic biodegradability difference in the high concentrated organic wastewater is removed, and has at utmost reduced the running cost of chemical oxidation.Simultaneously, this process using micro-aerobic bacteria method is fully removed biodegradable organic, can be as the biodegradable organic in the thorough removal high concentrated organic wastewater of aerobic treatment method, and the aeration cost be only for aerobic condition about 5% in addition lower.This combination process has satisfied the requirement that cost-effect is taken into account, working cost is low in the high concentrated organic wastewater processing.
(2) applied widely: the present invention is applicable to the dissimilar high concentrated organic wastewater that comprises high oil, high-sulfur, high ammonia.
(3) organic removal rate height: waste water after this art breading the COD clearance up to 99%.
(4) sludge yield is low: the present invention adopt the micro-aerobic bacteria method as pre-treatment can degrading high concentration organic waste water in most biodegradable materials, the sludge quantity that this stage produced accounts for the overwhelming majority of whole technology, the aerobic method that is lower than under the similarity condition is handled, and handles near anaerobic process.
Description of drawings
Accompanying drawing has provided process flow sheet of the present invention.
Wherein 1 little aerobic reactor 2 is that settling tank 3 is chemical oxidation pond (tower)
4 is that middle pond 5 is second pond for activated sludge tank 6
Embodiment
Describe principle of work of the present invention and embodiment in detail below in conjunction with accompanying drawing
A kind of combined treatment process for high-concentration organic waste water of the present invention fully combines the advantage of chemistry and biological treatment, strengthen the interim removal effect of high-enriched organics, as shown in Figure 1, waste water enters 1 little aerobic reactor, mixed solution enters 3 chemical oxidation pond (tower) through 2 settling tank post precipitation supernatant liquors, pond in the middle of mixture flows into 4 after the oxidation, middle pond water outlet enters 5 activated sludge tanks, mixed solution is qualified discharge after 6 second ponds precipitation is removed suspended solids, and part 6 second ponds bottom mud returns 5 activated sludge tanks.
Embodiment 1
Certain high-sulfur wastewater from fermentation industry, its water quality characteristic is as shown in table 1, the present invention inoculates micro-aerobic bacteria and carries out batch and cultivate in little aerobic reactor, this fermentation waste water that directly feeds not diluted after MLSS reaches 8g/L begins continuous processing, dissolved oxygen content is between 0-0.5mg/L in the controlling reactor, hydraulic detention time 3d, mixed solution passes through the ozonizer oxidation through settling tank post precipitation supernatant liquor, ozone and waste water duration of contact are 60～120min, after waste water after the ozone oxidation is by middle pond, enter activated sludge tank, reaction zone temperature is a normal temperature, control hydraulic detention time 10h, and dissolved oxygen concentration is greater than 2mg/L, sludge concentration 3g/L, sludge retention time 12d, mud 40% refluxes, and the activated sludge tank water outlet is qualified discharge after the second pond precipitation is removed suspended solids.Every effluent index is as shown in table 1
The desired value of certain wastewater from fermentation industry of table 1 before and after combination process of the present invention is handled
| COD(mg/L) | BOD(mg/L) | Reducing sugar (mg/L) | TN(mg/L) | TP(mg/L) | |
| Before the processing | 71134 | 52090 | 66722 | 1386 | 223 |
| After the processing | 100 | 20 | 5 | 50 | 12 |
Certain food processing wastewater, its water quality characteristic is as shown in table 2, at first in little aerobic reactor, inoculate micro-aerobic bacteria and carry out the batch cultivation, this fermentation waste water that directly feeds not diluted after MLSS reaches 4g/L begins continuous processing, dissolved oxygen content is between 0-0.5mg/L in the controlling reactor, hydraulic detention time 3d, mixed solution enters Fenton reagent oxidation reactor through settling tank post precipitation supernatant liquor, according to H
2O
2/ COD (W/W)=4.0, Fe
2+/ H
2O
2(W/W)=0.08 ratio adds Fe
2+And H
2O
2Pond in the middle of entering behind the reaction 130min, middle pond water outlet (pH is 7.5) enters activated sludge tank, reaction zone temperature is a normal temperature, hydraulic detention time 10h, and dissolved oxygen concentration is greater than 2mg/L, sludge concentration 3g/L, sludge retention time 10d, mud 20% refluxes, and the activated sludge tank water outlet is qualified discharge after the second pond precipitation is removed suspended solids.Every effluent index is as shown in table 2
The desired value of certain food processing wastewater of table 2 before and after combination process of the present invention is handled
| COD(mg/L) | BOD(mg/L) | Oil (mg/L) | TN(mg/L) | TP(mg/L) | |
| Before the processing | 8659 | 3651 | 8.8 | 24 | 18 |
| After the processing | 50 | 12 | 0 | 2 | 1 |
Claims (1)
1, a kind of combined treatment process for high-concentration organic waste water, it is characterized in that: this technology is composed in series by micro-aerobic bacteria facture, chemical oxidization method, activated sludge process, the stage that it carries out high-enriched organics based on organic biodegradability difference in the high concentrated organic wastewater is removed, adopt the micro-aerobic bacteria facture to remove biodegradable organic earlier, improve the biodegradability of waste water subsequently by chemical oxidization method, adopt activated sludge process to ensure effluent quality at last as aftertreatment.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173539A (en) * | 2011-03-15 | 2011-09-07 | 浙江环科环境研究院有限公司 | Device and process for processing high-salt non-biodegradable toxic industrial waste water |
| CN102583774A (en) * | 2012-02-13 | 2012-07-18 | 重庆大学 | Method utilizing natural manganese ore-microorganisms for co-treatment of micro pollutants difficult to degrade |
| CN102642926A (en) * | 2012-04-28 | 2012-08-22 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor |
| CN103043846A (en) * | 2011-10-12 | 2013-04-17 | 中国石油化工股份有限公司 | Acrylic fiber waste water treatment method |
| CN103449667A (en) * | 2013-08-30 | 2013-12-18 | 中国地质大学（武汉） | Method for treating restaurant wastewater by using aerobic microorganism and ozone combined technology |
| CN105923938A (en) * | 2016-07-18 | 2016-09-07 | 胡勇飞 | SBR sewage treatment system and use method thereof |
| CN115466008A (en) * | 2022-08-26 | 2022-12-13 | 华中科技大学 | Combined treatment method and process for coking phenol-cyanogen sewage |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100334017C (en) * | 2005-03-10 | 2007-08-29 | 华东理工大学 | BCB combination process of treating organic waste water |
| CN1803670A (en) * | 2005-12-15 | 2006-07-19 | 南京大学 | Method for pretreatment of sulphate-contained high concentration organic wastewater by micro-aerobic hydrolysis and acidification |
| CN1994936B (en) * | 2006-12-05 | 2011-06-29 | 南开大学 | Method for processing and resuing carbinol waste water for circulated cooling water |
| CN101058464A (en) * | 2007-05-16 | 2007-10-24 | 北京师范大学 | Micro-aerobic bacteria treatment method for high concentrated organic wastewater |
| CN101311131B (en) * | 2007-05-23 | 2010-06-23 | 中国科学院沈阳应用生态研究所 | Sewage handling method and uses thereof |
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2009
- 2009-04-14 CN CN2009101313163A patent/CN101519267B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173539A (en) * | 2011-03-15 | 2011-09-07 | 浙江环科环境研究院有限公司 | Device and process for processing high-salt non-biodegradable toxic industrial waste water |
| CN102173539B (en) * | 2011-03-15 | 2012-07-04 | 浙江环科环境研究院有限公司 | Device and process for processing high-salt non-biodegradable toxic industrial waste water |
| CN103043846A (en) * | 2011-10-12 | 2013-04-17 | 中国石油化工股份有限公司 | Acrylic fiber waste water treatment method |
| CN102583774A (en) * | 2012-02-13 | 2012-07-18 | 重庆大学 | Method utilizing natural manganese ore-microorganisms for co-treatment of micro pollutants difficult to degrade |
| CN102583774B (en) * | 2012-02-13 | 2014-06-11 | 重庆大学 | Method utilizing natural manganese ore-microorganisms for co-treatment of micro pollutants difficult to degrade |
| CN102642926A (en) * | 2012-04-28 | 2012-08-22 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor |
| CN102642926B (en) * | 2012-04-28 | 2013-07-03 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor |
| CN103449667A (en) * | 2013-08-30 | 2013-12-18 | 中国地质大学（武汉） | Method for treating restaurant wastewater by using aerobic microorganism and ozone combined technology |
| CN105923938A (en) * | 2016-07-18 | 2016-09-07 | 胡勇飞 | SBR sewage treatment system and use method thereof |
| CN115466008A (en) * | 2022-08-26 | 2022-12-13 | 华中科技大学 | Combined treatment method and process for coking phenol-cyanogen sewage |
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