CN101058464A - Micro-aerobic bacteria treatment method for high concentrated organic wastewater - Google Patents
Micro-aerobic bacteria treatment method for high concentrated organic wastewater Download PDFInfo
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- CN101058464A CN101058464A CNA2007101069748A CN200710106974A CN101058464A CN 101058464 A CN101058464 A CN 101058464A CN A2007101069748 A CNA2007101069748 A CN A2007101069748A CN 200710106974 A CN200710106974 A CN 200710106974A CN 101058464 A CN101058464 A CN 101058464A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a disposing method of high-density organic waste water through micro-aerobic bacteria, which is characterized by the following: operating the technique under micro-aerobic condition (1um dissolved oxygen density); oxidizing the organics (CO2 and H2O) completely; disposing high-sulfur typed high-oil typed organic waste water which can't be disposed by anaerobic technique directly through designing and controlling the microbe host and operating parameter; utilizing the present waste water disposed structure completely; reducing investment and operating cost.
Description
Technical field
The present invention relates to environmental engineering and waste water treatment engineering field, relate in particular to a kind of be not response feature with the anoxic denitrification, be superior microorganism with the micro-aerobic bacteria, the efficient thoroughly micro-aerobic bacteria treatment method for high concentrated organic wastewater of degradable organic pollutant under extremely low oxyty.This method is specially adapted to high oil type or the high-sulfur type high concentrated organic wastewater that anaerobic treatment process can not directly be handled.
Background technology
High concentrated organic wastewater is distributed widely in industrial circles such as fermentation industry, food-processing industry, chemical engineering industry, and its principal character is the COD very high concentrations, reaches tens thousand of even hundreds of thousands of mg/L.According to statistics, the alcohol industry waste water about 1 of the annual discharging of China, 2,000,000 t, monosodium glutamate trade effluent 250～4,000,000 t, citric acid industry waste water 1,100,000 t, wastewater from starch industry 1,6,000,000 t, therefore the pollution level that the in a single day direct discharging of these high concentrated organic wastewaters is caused, must purify it to discharging standards and could discharge far above low-concentration organic waste water.
High concentrated organic wastewater adopts anaerobic technique to handle usually, and have advantages such as the excess sludge generation is few, load is high, product is recyclable, yet, because anaerobion is low to the affinity of oil content, the anaerobism product hydrogen sulfide of high concentration sulfate has higher microorganism toxicity, anaerobic technique can not be used for directly handling high oil type or high-sulfur type high concentrated organic wastewater usually, and needs to increase such as pre-treatment or aided processes such as oil removing, desulfurization.For example application number is 00131326.6, name is called vertical twisty biochemistry reactor anerobic sowage technology process, publication number is the patent of invention of CN1288865A, it is different and require the different anaerobic technique processes of forming according to the sewage kind with vertical twisty biochemistry reactor, thereby it has adopted biogas stirring and circulation blow-removing hydrogen sulfide technology to be applied to the high-sulfur high concentrated organic wastewater with the restraining effect of reduction hydrogen sulfide.These assist measures have increased processing cost on the one hand, on the other hand as easy as rolling off a log stability and the effect that influences subsequent disposal of pretreating effect.On the other hand, conventional aerobic biological treatment process (more than the general 2-4mg/L of dissolved oxygen) in water inlet BOD5 concentration greater than 1,000mg/L can't carry out because of anoxic often, all there are certain limitation in its running cost higher (every removals 1kg COD needs power consumption 13-18kwh) simultaneously, so conventional anaerobism or aerobic process when being applied to these special high concentrated organic wastewaters.
Utilize yeast to the adaptability of high osmotic pressure environment and the yeast treatment technology of developing can be used as the selection of the high concentrated organic wastewater that anaerobic technique can not directly handle to a certain extent.This comprises two aspects: (1) aerobic yeast treatment technology.As application number is 01110557.7, name is called method for treating waste water produced in salad oil production and device, publication number is that the application for a patent for invention of 1380262A discloses a kind of yeast that adopts the nature seed selection handle high density salad oil processing waste water continuously under aerobic condition, after removing most of oil and COD, utilize again conventional aerobe facture as end processing use water treatment process up to standard.This technical requirements moves under aerobic condition and since waste strength when higher the mass transfer coefficient of oxygen lower, thereby the needed power consumption of this technology is higher.(2) little aerobic treatment technology.As application number is 200510130317.8, name is called high concentrated organic wastewater Yeast low oxygen SBR process and device, publication number is the patent of invention of CN1807284, and application number is 200510130318.2, name is called a kind of multistage yeast hypoxemia treatment process and method of handling high concentrated organic wastewater, and publication number is that the patent of invention of CN1807285 all is to be 0-0.5mg/L under to handle high concentrated organic wastewater as superior microorganism in oxyty with yeast.Yet because yeast shows as the anaerobic hydrolysis-acidification feature as its metabolism of oxygen animalcule of holding concurrently under little aerobic condition, be about to macromole matrix and become small-molecule substance, and be not thorough removal organism, thereby the characteristics of little aerobic treatment technology of double oxygen animalcule (comprising hold concurrently oxygen bacterium and yeast) are that the COD clearance is lower, only be 15～30% (environmental sciences, 2005,26 (3): 106-111) or 70% (environmental science and technology, 2006,29 (11): 96-98), water outlet COD level is everlasting more than thousands of mg/L, still is high concentrated organic wastewater, thereby does not really solve the difficult treatment of these high concentrated organic wastewaters.
In the biological fermentation field, by specified microorganisms biological fermentation effect under given conditions, can and obtain specific product (as organism or intermediate product) with the organic matter transformation in the high concentrated organic wastewater, thereby can reduce organic concentration in the high concentrated organic wastewater to a certain extent.As application number is 99119084.X, name is called the method for the organic waste water production biotic pesticide that utilize monosodium glutamate industry generation, Granted publication number is a kind of method of utilizing the industrial high concentrated organic wastewater of monosodium glutamate to produce the bacillus thuringiensis biotic pesticide for the application for a patent for invention of 1120664C discloses, it utilizes the monosodium glutamate trade effluent and cultivates bacillus thuringiensis in batches through the bacillus thuringiensis of domestication is a large amount of in fermentor tank, and it is good and to the liquid or solid-state microbial pesticide of the malicious biological nontoxic of height or little poison to obtain insecticidal effect after fermented liquid is suitably handled.Because the more pretreatment process of this Technology Need, be reflected under the aseptic condition and carry out, processing cost is higher, and its drainage water still has higher Pollutant levels and (is produced as main purpose with specific meta-bolites, organic removal rate is lower), thereby still need aftertreatment just can make the water outlet qualified discharge.
This shows that still there is deficiency in existing biological wastewater treatment technology when handling high concentrated organic wastewater (especially anaerobic treatment process can not directly handle high oil, high-sulfur type high concentrated organic wastewater).Develop a kind of novel high concentrated organic wastewater biologic treating technique, and make it to adapt to special high concentrated organic wastewater and have lower, the treatment effect of investment running cost preferably characteristics have very realistic meanings.
Summary of the invention
The present invention is directed to some high concentrated organic wastewater and can not adopt that anaerobic technique is directly handled, there is insufficient present situation in other treatment technology, to provide a kind of be superior microorganism with the micro-aerobic bacteria, operation under little aerobic condition, can the exhaustive oxidation organism (product is CO
2And H
2O) micro-aerobic bacteria treatment method.By design and the control to factors such as wastewater treatment microbial main body and operating parameterss, the art of this patent can directly be handled the high concentrated organic wastewater that anaerobic techniques such as high-sulfur type, high oil type can not directly be handled.
The invention is characterized in, the little aerobic treatment method of described high concentrated organic wastewater microorganism is based on the selectivity advantage of micro-aerobic bacteria under little aerobic condition (1 μ M oxyty), with the micro-aerobic bacteria is to handle main body, by the efficient organic composition that decomposes in the high concentrated organic wastewater of the circulation of the TCA under little aerobic condition, metabolic process with fully, bio-oxidation is a feature completely, belongs to typical aerobic metabolic process (metabolic characteristics that is different from double oxygen animalcule under absolute anaerobion and the little aerobic condition).
Feature of the present invention also is, the little aerobic treatment method of described high concentrated organic wastewater microorganism is moved under the conventional aerobic microbiological metabolic activity and all relatively poor little aerobic condition of growing, and compare with aerobic treatment process can reduce significantly the oxygen supply level (the aeration cost for the latter about 5% in addition lower), thereby be different from conventional aerobic treatment.
In addition, feature of the present invention also is, the little aerobic treatment method of described high concentrated organic wastewater microorganism and bacterium are that the conventional anoxic denitrification denitrification process (dissolved oxygen 0-0.5mg/L) of superior microorganism also exists the different of essence, predominant bacteria is respectively micro-aerobic bacteria and double oxygen bacterium in two kinds of treatment processs, and the organic removal of the latter is the prerequisite that exists for oxidation state nitrogen (comprising nitrate and nitrite), is main purpose with the denitrogenation; Micro-aerobic bacteria treatment method not with the prerequisite that exists for of oxidation state nitrogen, is a main purpose with the oxidation of organic compounds then.
Main purpose of the present invention is to overcome the shortcoming that exists when existing biological treatment is handled some high concentrated organic wastewater, provides a kind of less investment, running cost is low, technology is simple, speed of response is fast, the high concentrated organic wastewater New Method for Processing of applied range.Compared with prior art the art of this patent has the following advantages:
1, efficient height: the present invention adopts micro-aerobic bacteria, under condition of suspension culture, the high density organic composition is had higher removal efficient (the BOD clearance can reach more than 95% when one-level was handled).
2, save cost: traditional aerobic treatment process is not suitable for high concentrated organic wastewater, it is huge to consume energy, shortcomings such as complex process, the investment that anaerobic technique exists at some high concentrated organic wastewater of processing is big, processing cost height, comparatively speaking, the art of this patent has lower investment and running cost.
3, structures are few, and operation is simple: this patent lacks than conventional anaerobic-aerobic treatment process structures, does not need pretreatment process.
4, wide accommodation: be applicable to waste water types such as the incompetent high-sulfur type of some anaerobic treatment process, high oil type.
5, simple: as can to continue to use treatment facility, after adjusting operating mode, add novel bacterial, and can adjust operating parameters according to the variation of processing feature.
6, surplus sludge volume is few: sludge yield and anaerobic technique are close, far below aerobic process.
Embodiment
Below describe principle of work of the present invention and embodiment in detail:
The method that micro-aerobic bacteria of the present invention is handled high concentrated organic wastewater can make full use of existing wastewater treatment structures, and only needing increases the little air pipe network, and tells the part air demand from follow-up aerobic treatment section and get final product, and does not need extra energy consumption.In the microbial cultivation process that the art of this patent is implemented, at first in structures, add corresponding high concentrated organic wastewater, inoculate the microorganism provenance, under little aerobic condition, be cultured to certain microbial biomass, and then feed waste water begins high concentrated organic wastewater under little aerobic condition continuous treating processes.Be to shorten the microorganism culturing cycle, also can adopt in batches or the continuous mode screening adapts to water quality, micro-aerobic bacteria that settleability is good, after be used further to the enlarged culturing of microorganism in the water treatment building.
Embodiment 1
Certain high-sulfur wastewater from fermentation industry, its water quality characteristic is as shown in table 1, and the prior art type needed to increase the pretreatment desulfurizing operation before biologic treatment process.The present invention is the microbe inoculation source in original structures, in batches cultivates micro-aerobic bacteria, and this fermentation waste water that directly feeds not diluted after MLSS reaches 16g/L begins continuous processing, and one-level every effluent index of carrying out a biological disposal upon is as shown in table 1.
The desired value of certain wastewater from fermentation industry of table 1 before and after micro-aerobic bacteria is handled
| BOD Cr(mg/L) | Reducing sugar (mg/L) | ?TN(mg/L) | ?TP(mg/L) | |
| Before the processing | 72090 | ?62790 | ?1461 | ?224 |
| After the processing | 1004 | ?0 | ?488 | ?134 |
Embodiment 2
Certain oily(waste)water, its feature sees Table 2, is typical high oil type high concentrated organic wastewater, and existing treatment process all adopts " oil removing operation+biological treatment ".The present invention adopts batch to cultivate screening scheme acquisition micro-aerobic bacteria with this waste water of not diluted as substratum, obtains to be used for on-the-spot microorganism provenance after little aerobic cultivation of 50L fermentor tank.The microorganism provenance is added to (being the anaerobism post originally) in the structures that add such organic waste water, and start-up period is 15 days, and the waste water that feeds not diluted then begins continuous processing, and one-level biological treatment effluent index is shown in Table 2.
The desired value of certain oily(waste)water of table 2 before and after micro-aerobic bacteria is handled
| COD Cr(mg/L) | Oil (mg/L) | ?TN(mg/L) | ?TP(mg/L) | |
| Before the processing | 12011 | ?3659 | ?1061 | ?256 |
| After the processing | 300 | ?20 | ?305 | ?114 |
Claims (2)
1, a kind of micro-aerobic bacteria treatment method for high concentrated organic wastewater, it is characterized in that: based on the selectivity advantage of micro-aerobic bacteria under little aerobic environment, reactive system is controlled under little aerobic condition, by design and control to factors such as wastewater treatment microbial main body and operating parameterss, formation is that the degradation flora of superior microorganism is handled high oil type or the high-sulfur type high concentrated organic wastewater that high concentrated organic wastewater, particularly anaerobic technique can't directly be handled with the micro-aerobic bacteria.
2, micro-aerobic bacteria treatment method for high concentrated organic wastewater as claimed in claim 1 is characterized in that: be superior microorganism with the micro-aerobic bacteria, (1 μ M oxyty) operation under little aerobic condition, (product is CO to the organism in can the exhaustive oxidation high concentrated organic wastewater
2And H
2O).
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| CNA2007101069748A CN101058464A (en) | 2007-05-16 | 2007-05-16 | Micro-aerobic bacteria treatment method for high concentrated organic wastewater |
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| CNA2007101069748A CN101058464A (en) | 2007-05-16 | 2007-05-16 | Micro-aerobic bacteria treatment method for high concentrated organic wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519267B (en) * | 2009-04-14 | 2011-08-24 | 北京师范大学 | Combined treatment process for high-concentration organic waste water |
-
2007
- 2007-05-16 CN CNA2007101069748A patent/CN101058464A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 蓝惠霞等: "微氧条件下培养降解五氯酚的好氧颗粒污泥", 《中国造纸》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519267B (en) * | 2009-04-14 | 2011-08-24 | 北京师范大学 | Combined treatment process for high-concentration organic waste water |
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Application publication date: 20071024 |