CN102515445A - System and method for treatment of high-concentration yeast wastewater - Google Patents
System and method for treatment of high-concentration yeast wastewater Download PDFInfo
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- CN102515445A CN102515445A CN201110457764XA CN201110457764A CN102515445A CN 102515445 A CN102515445 A CN 102515445A CN 201110457764X A CN201110457764X A CN 201110457764XA CN 201110457764 A CN201110457764 A CN 201110457764A CN 102515445 A CN102515445 A CN 102515445A
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Abstract
The invention provides a system for treatment of high-concentration yeast wastewater, which comprises an anaerobic bioreactor, a solid-liquid separation tank and a desulfurization device, wherein the solid-liquid separation tank is fixedly connected with the anaerobic bioreactor, and the desulfurization device is connected with an exhaust port of the anaerobic bioreactor. The solid-liquid separation tank is provided with a sludge backflow pipe and connected with a white water tank, wherein the sludge backflow pipe is used for leading sludge to flow back to the anaerobic bioreactor after solid-liquid separation, and the white water tank provides pressure gas-dissolvable water for the solid-liquid separation tank. The desulfurization device is connected with a biogas storage cabinet which is connected with a gas inlet of the anaerobic bioreactor through a biogas backflow pipe. The anaerobic bioreactor of the system is used for organic degradation to generate biogas which is partially reused in the anaerobic bioreactor to carry sulfide out of the bioreactor, and restraining and toxicity of the sulfide to anaerobic reaction can be relieved while efficient solid-liquid separation can be completed by the aid of the pressure gas-dissolvable water. The treatment system enables the anaerobic reaction to be more smooth, treatment effect is stable, stable biogas yield can be achieved, and comprehensive utilization of resources is realized.
Description
Technical field
The present invention relates to the yeast wastewater process field, be specifically related to a kind of spray-drying tower and utilize the yeast fermentation waste liquid to produce the method for organic fertilizer.
Background technology
Fermentation industry is the second largest pollution industry that is only second to paper industry at present; Yeast is as one of product in the fermentation industry; The features of pollution that has fermentation industry too, water loss is big, the contaminated wastewater substrate concentration is higher, and its staple comprises materials such as sugar, protein, amino acid, pigment, pectin; The improvement of its waste water is a great problem that the environmental protection field of water treatment is generally acknowledged, has had a strong impact on the development of the yeast industry of China.
Because yeast fermentation waste water is rich in abundant organic and multiple inorganic elements, handling through anaerobic biological reactor is a kind of feasible processing mode, and COD can effectively degrade.If walk the way of comprehensive utilization of resources, be an important ring of realizing recycling economy in the sugaring industrial chain.Therefore, constant always about the research of yeast wastewater and comprehensive utilization of relevant industries waste water and recycle in recent years.
Anaerobic biological reactor commonly used at present has UASB (upflow anaerobic sludge blanket process), EGSB (anaerobic expanded granular sludge bed).
Organic loading is high in the UASB reactor drum, and hydraulic detention time is short, no filler, and no mud reflux, but short flow phenomenon possibly appear, and influence processing power, when the concentration of suspension in the water inlet is too high, can cause obstruction.
Be in " swelling state " in EGSB reactor drum endoparticle Sludge Bed; And under the stirring action of high upper reaches speed and aerogenesis; Contacting between waste water and granule sludge is more abundant, and hydraulic detention time is shorter, thereby can improve the organic loading and the processing efficiency of reactor drum greatly.But influenced by the form of granule sludge bigger for the efficient of mud, water, gas three phase separation in the reactor drum; If reactor drum endoparticle sludge crushing; A large amount of mud can take place to wash out; Cause the reactor drum collapse, and the yeast wastewater of high density is because high sulfate radical, high ammonia nitrogen and high conductivity are unfavorable for the growth of granule sludge.
Summary of the invention
The problem that the present invention solves is to provide a kind of treatment system and method for high yeast concentration waste water, and ability good treatment high yeast concentration waste water, and the biogas that can utilize reaction to produce reach the comprehensive utilization of resource.
In order to solve the problems of the technologies described above, technical scheme of the present invention is:
A kind of treatment system of high yeast concentration waste water comprises anaerobic biological reactor, the solid-liquid separation jar that links to each other with said anaerobic biological reactor, and the desulfurizer that links to each other with the venting port of anaerobic biological reactor; Said solid-liquid separation jar is provided with the mud return line that the mud after the solid-liquid separation is back to anaerobic biological reactor, and is connected with the white water tank that pressure air-dissolving water is provided to it; Said desulfurizer is connected with biogas storage cabinet, and said biogas storage cabinet is connected with the inlet mouth of anaerobic biological reactor through the biogas return line.
As preferably, said biogas storage cabinet also links to each other with said white water tank.
As preferably, the water port of said solid-liquid separation jar links to each other with said white water tank.
A kind of high yeast concentration wastewater treatment method may further comprise the steps:
High yeast concentration waste water is carried out anaerobic biological treatment, mud mixture is carried out solid-liquid separation, in mud mixture, add pressure air-dissolving water, utilize air supporting with mud with handle after the water solid-liquid separation, the mud after the separation refluxes and is used for anaerobic biological treatment; The biogas that produces carries out desulfurization, and a part of biogas returns and is used for anaerobic biological treatment after the desulfurization, and the sulfide that anaerobic biological treatment produces is taken out of.
As preferably, some is used to prepare said pressure air-dissolving water the biogas that said anaerobic biological treatment produces.
As preferably, the water outlet part after the said processing is used to prepare said pressure air-dissolving water.
As preferably, during said anaerobic biological treatment, sludge loading is not higher than 0.3KgCOD/ (KgVS.d).
As preferably, during said anaerobic biological treatment, volumetric loading is not higher than 7KgCOD/ (m
3.d).
The present invention provides a kind of treatment system of high yeast concentration waste water; Use the anaerobic biological reactor degradation of organic substances; Produce biogas, and a part of biogas is back to the anaerobe reaction, take the sulfide in the reactor drum out of; Remove its inhibition and toxicity, utilize pressure air-dissolving water can carry out solid-liquid separation efficiently simultaneously anaerobic reaction.This treatment system makes anaerobic reaction more smooth, and treatment effect is stable, can reach stable biogas yield, and resource is fully utilized.
Description of drawings
The synoptic diagram of the high yeast concentration Waste Water Treatment that Fig. 1 is provided for a kind of embodiment of the present invention.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
The high conductivity of high yeast concentration waste water, high ammonia nitrogen and high sulfate radical characteristic have certain influence to biological degradation, and the character that the present invention is directed to high yeast concentration waste water provides a kind of treatment system and treatment process, better the treatment of high concentration yeast wastewater.
Please refer to Fig. 1, the synoptic diagram of the high yeast concentration Waste Water Treatment that Fig. 1 is provided for a kind of embodiment of the present invention.The treatment system of this high yeast concentration waste water comprises anaerobic biological reactor, the solid-liquid separation jar that links to each other with said anaerobic biological reactor, and the desulfurizer that links to each other with the venting port of anaerobic biological reactor.The general reactor drum that anaerobic biological reactor adopts this area to use gets final product; The solid-liquid separation jar can be installed on the top of anaerobic reactor; Be used for solid-liquid separation; The solid-liquid separation jar also is provided with rising pipe and mud return line, and mud return line is connected to anaerobic biological reactor, can reflux after mud and the water sepn and participate in the anaerobe reaction again.
Vitriol in the high yeast concentration waste liquid can be reduced to sulfide behind anaerobic reaction; Therefore desulfurizer is used for removing the sulfide of biogas; Desulfurizer can adopt this area device commonly used; Like bio-desulfurization device, chemical desulfurization device etc., preferably adopt bio-desulfurization device, comprise washing tower, bio-reactor.Desulfurizer is connected with biogas storage cabinet; Biogas storage cabinet is connected with the inlet mouth of anaerobic biological reactor through the biogas return line; Biogas behind the partial desulfurization is back to anaerobic biological reactor; Sulfide in the reactor drum is taken out of, removed inhibition and the toxicity of sulfide, anaerobic reaction is carried out smoothly anaerobic reaction.
The solid-liquid separation jar also is connected with white water tank, and white water tank provides pressure air-dissolving water in order to carry out solid-liquid separation in the solid-liquid separation jar.Preferred biogas storage cabinet also links to each other with white water tank, and the biogas that anaerobic reaction capable of using generates prepares pressure air-dissolving water.The water port of preferred solid-liquid separation jar links to each other with said white water tank, and the water outlet after the processing capable of using prepares pressure air-dissolving water.
The treatment process of high yeast concentration waste liquid provided by the invention may further comprise the steps:
The high yeast concentration waste water of producing discharging sent into carry out anaerobic biological treatment in the anaerobic biological reactor, sludge loading is not higher than 0.3KgCOD/ (KgVS.d) in the controlling reactor, and volumetric loading is not higher than 7KgCOD/ (m
3.d), through anaerobic treatment, most COD Degradation and Transformation are biogas in the waste water.
Send into desulfurizer behind the collecting methane that produces; Remove the sulfide that wherein contains, preferably adopt biological desulfurizing technology, can transfer the hydrogen sulfide in the biogas to elemental sulfur; Biogas after the desulfurization is stored in the biogas storage cabinet; Part biogas returns in the anaerobic biological reactor through the biogas return line, and in order to the sulfide in the reactor drum is taken out of, remaining biogas can be used as the energy and uses.
Simultaneously the mud mixture of mud and waste water is pumped into and carry out mud-water separation in the solid-liquid separation jar, the mud after the separation passes back in the anaerobic biological reactor, and water is then discharged.In mud mixture, add pressure air-dissolving water (plain boiled water) in the solid-liquid separation process, utilize air supporting mud and water sepn.
The preparation of pressure air-dissolving water: preferably use the water outlet preparation after the solid-liquid separation; The water outlet of reactor drum is pumped into white water tank; The biogas through biological desulphurization that gas preferably uses reactor drum to produce, a part of biogas pumps into white water tank, makes the pressure of white water tank maintain the above about 60min of 0.4Mpa.At the initial stage of reactor start-up, if there is not biogas, the preparation of plain boiled water can replace with nitrogen.
The pressure air-dissolving water that makes is discharged into the solid-liquid separation jar through the pressure reduction of white water tank and reactor drum.In the solid-liquid separation jar, along with the release of pressure, the bubble in the pressure air-dissolving water constantly discharges, with the muddy water thorough mixing.Bubble changes from small to big in the process that rises, and is adsorbed on the mud, and mud floats on top.The present invention adopts continuous water inlet, interim water outlet, reach the water outlet time of setting after, through being arranged on the rising pipe draining on the solid-liquid separation jar, mud is back to anaerobic biological reactor through sludge pipe.
Embodiment:
Yichang one treatment plant, every day treatment of high concentration yeast wastewater 1890m
3, its COD concentration 55000-60000ppm, sulfate concentration 4200-4500ppm, total nitrogen 2500-3000ppm, specific conductivity 30-40ms/cm.
Utilize treatment system of the present invention to handle, sludge loading is 0.2KgCOD/ (KgVS.d), and volumetric loading is 6.5KgCOD/ (m
3.d), effluent COD concentration is 21000-22000ppm, and sulfate concentration is 1800-1900ppm, and total nitrogen 2200-2300ppm is higher than factor of created gase, and can reclaim biogas 35000m
3, about 300 tons of day generation steam has made full use of the biogas energy that generates when handling waste water.
More than the treatment system and the method for a kind of high yeast concentration waste water provided by the present invention have been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (8)
1. the treatment system of a high yeast concentration waste water is characterized in that, comprises anaerobic biological reactor, the solid-liquid separation jar that links to each other with said anaerobic biological reactor, and the desulfurizer that links to each other with the venting port of anaerobic biological reactor; Said solid-liquid separation jar is provided with the mud return line that the mud after the solid-liquid separation is back to anaerobic biological reactor, and is connected with the white water tank that pressure air-dissolving water is provided to it; Said desulfurizer is connected with biogas storage cabinet, and said biogas storage cabinet is connected with the inlet mouth of anaerobic biological reactor through the biogas return line.
2. treatment system according to claim 1 is characterized in that, said biogas storage cabinet also links to each other with said white water tank.
3. treatment system according to claim 1 is characterized in that, the water port of said solid-liquid separation jar links to each other with said white water tank.
4. a high yeast concentration wastewater treatment method is characterized in that, may further comprise the steps:
High yeast concentration waste water is carried out anaerobic biological treatment, mud mixture is carried out solid-liquid separation, in mud mixture, add pressure air-dissolving water, utilize air supporting with mud with handle after the water solid-liquid separation, the mud after the separation refluxes and is used for anaerobic biological treatment; The biogas that produces carries out desulfurization, and a part of biogas returns and is used for anaerobic biological treatment after the desulfurization, and the sulfide that anaerobic biological treatment produces is taken out of.
5. treatment process according to claim 4 is characterized in that, some is used to prepare said pressure air-dissolving water the biogas that said anaerobic biological treatment produces.
6. treatment process according to claim 4 is characterized in that, the water outlet part after the said processing is used to prepare said pressure air-dissolving water.
7. according to each described treatment process in the claim 4 to 6, it is characterized in that during said anaerobic biological treatment, sludge loading is not higher than 0.3KgCOD/ (KgVS.d).
8. according to each described treatment process in the claim 4 to 6, it is characterized in that during said anaerobic biological treatment, volumetric loading is not higher than 7KgCOD/ (m
3.d).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112077132A (en) * | 2019-06-14 | 2020-12-15 | 杭州洁洁环保科技有限公司 | Dry type fermentation and biochemical treatment integrated machine for garbage and treatment process |
| CN114045311A (en) * | 2021-10-25 | 2022-02-15 | 中国科学院广州能源研究所 | Method for preparing biogas from citrus pulp |
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| CN112077132A (en) * | 2019-06-14 | 2020-12-15 | 杭州洁洁环保科技有限公司 | Dry type fermentation and biochemical treatment integrated machine for garbage and treatment process |
| CN112077132B (en) * | 2019-06-14 | 2024-03-12 | 杭州洁洁环保科技有限公司 | Dry-type fermentation biochemical treatment integrated machine and treatment process for garbage |
| CN114045311A (en) * | 2021-10-25 | 2022-02-15 | 中国科学院广州能源研究所 | Method for preparing biogas from citrus pulp |
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Application publication date: 20120627 |