CN101418316A - Method for producing marsh gas through mixed anaerobic fermentation of blue algae and sludge - Google Patents
Method for producing marsh gas through mixed anaerobic fermentation of blue algae and sludge Download PDFInfo
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- CN101418316A CN101418316A CNA2008101944518A CN200810194451A CN101418316A CN 101418316 A CN101418316 A CN 101418316A CN A2008101944518 A CNA2008101944518 A CN A2008101944518A CN 200810194451 A CN200810194451 A CN 200810194451A CN 101418316 A CN101418316 A CN 101418316A
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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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
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The invention provides a method for producing biogas by the anaerobic fermentation of mixed blue algae and sludge, which belongs to the technical field of environmental protection purification and waste resource treatment. In the method, the blue algae and the sludge are mixed for the anaerobic fermentation to produce the biogas, and the whole process is completed in an anaerobic reactor; the blue algae and the sludge are mixed in the rector, N2 is introduced to form the anaerobic state, and the blue algae and the sludge are fermented at a temperature of between 35 and 37 DEG C; and in the rector, the blue algae is discontinuously and periodically added, the degradation condition of the material is observed, at the same time, the organic matter concentration of the discharged material and the concentrations of CH4 and CO2 in gas generated from fermentation are measured until the reactor is stably operated. The biogas generated is subjected to desulphurization treatment and supplied to users for combustion or collected for power generation; and the dregs generated are used as a fertilizer for farmlands. The method for producing the biogas by the anaerobic fermentation of the mixed blue algae and the municipal sludge has the advantages of having the effect of answering multiple purposes, thoroughly eliminating algae toxins, combining the blue algae utilization and the treatment of the sludge from a municipal sewage plant, and solving organic pollution problems in both the rural and urban areas.
Description
Technical field
The method of a kind of blue-green algae and mud producing marsh gas through mixed anaerobic fermentation belongs to environmental purification, changing waste into resources processing technology field.
Background technology
A large amount of breedings of eutrophic water body algae cause the outburst of wawter bloom, bringing for the surface water quality and the ecosystem seriously influences: the water quality dirt is smelly, transparency descends, sensory properties worsens, and causes the rapid reduction of water body dissolved oxygen concentration simultaneously, causes hydrobiont because of the anoxic mass mortality, the most worryingly be, when the decline of some algae (mainly being microcystic aeruginosa) broken wall, its cytolysis meeting causes the endotoxic release of born of the same parents, has brought difficulty for the resource utilization of blue-green algae.Result of study shows that the main target organ of Microcystin (MCs) is a liver, mainly show as and make the congested enlargement of liver, can cause hepatorrhagia and necrosis when serious, its mechanism of toxication is by suppressing the activity of phosphoprotein phosphatase in the liver cell, bring out the cytokeratin hyperphosphorylation, cause the hepatocyte of mammal microfilament to decompose, break and hemorrhage; Find according to another investigation, in the tap water among the existence of MCs and the crowd sickness rate of primary hepatocarcinoma and large bowel cancer very big dependency is arranged; Find that in current research MCs is also quite obvious for the toxic action of mouse lung.
In by the end of May, 2007, the big area outburst again of jiangsu wuxi Taihu Lake area blue-green algae, and the outburst of Taihu Lake blue-green algae causes nearly 2,000,000 residents' of Wuxi City tap water crisis, the blue-green algae problem in lake enters the public's sight line once more.After the Taihu Lake blue-green algae breaks out, directly salvage blue-green algae as emergency schedule, as not dealing carefully with, the blue algae water that salvages comes back to Tai Lake by seepage, runoff easily and causes secondary pollution, therefore, how disposing increasing blue algae water has become important and the urgent realistic problem.
The greatest problem that blue algae water harmless treatment and recycling, especially industrialization development run into is that the salvaging amount is big, water content height, dehydration, detoxification difficulty.Moisture in the blue algae water is up to more than 97%, and conventional dewatering is difficult to blue-green algae is separated, and removes moisture with spray-drying process and costs dearly.It is very many that blue-green algae is developed to the link that protective foods, feed, amino acid fertilizer relate to, and not only relates to dehydration, detoxification, also relates to the dynamic change of beneficiating ingredient.The dehydration detoxification should grasp any degree and just can develop food, feed and fertilizer, and how or the like these product market competitivenesses all are the problems that remains to be explored.
Recycling should be the primary selection that blue-green algae is handled.If 5-10 ton blue algae water is watered in every mu of nonirrigated farmland, forest land, the blue-green algae of salvaging every day only needs 150-300 mu soil (to salvage 1500 tons of reckonings every day) to be used for handling.Utilize mode to compare with other, direct returning to farmland is most economical way, but not safest way, because contain the algae toxin in the blue-green algae, these algae toxin to the influence of seed, root, stem, leaf how, in soil to clear up rule still not clear, though peasant along the lake has the tradition of utilizing water bloom to make fertilizer, this tradition has reasonableness, but may not have science.Utilize in the mode numerous, safest way is biomass such as blue algae water and mud to be produced biogas, marsh gas power generation or directly burnt by anaerobically fermenting as fermentation raw material together be used, biogas residue and biogas liquid is the field also, perhaps the natural pond slag is developed to feed or organic fertilizer.The present invention is exactly will be by blue-green algae and municipal sludge producing marsh gas through mixed anaerobic fermentation technology, accomplish the effect of achieving many things at one stroke, utterly destroyed the algae toxin, the treating sludge that has solved blue-green algae outlet and municipal sewage plant combines, and solves the organic contamination problem in rural area and city.
Summary of the invention
The method that the purpose of this invention is to provide a kind of blue-green algae and mud producing marsh gas through mixed anaerobic fermentation.The Taihu Lake blue-green algae pollutes does not at present also have terms of settlement completely; the blue-green algae that salvages from the water body of Taihu Lake might pollute Taihu Lake once again; at this present situation; the objective of the invention is to obtain that a kind of automatization control, working cost are low, non-secondary pollution, convenient management, have the new technology of preparing of higher biogas yield; and, realize the innoxious and recycling treatment of blue-green algae with its mass-producing industrialization.
Technical scheme of the present invention: the method for a kind of blue-green algae and mud producing marsh gas through mixed anaerobic fermentation, it is characterized in that whole process is finished with blue-green algae and mud producing marsh gas through mixed anaerobic fermentation in anaerobic reactor, in reactor, blue-green algae and mud are mixed, feed N then
2Cause anaerobic state, 35～37 ℃ of fermentations in reactor, are regularly added blue-green algae by phased manner, observe the corruption situation of raw material, measure the organic concentration of discharge material and the CH in the fermentation generation gas simultaneously
4, CO
2Concentration enters steady operational status until reactor;
Used mud is selected one or more in granule sludge, digested sludge, the excess sludge for use;
Select for use the butt weight ratio of blue-green algae and mud to be: blue-green algae: granule sludge is 5～6: 1, blue-green algae: digested sludge is 5: 1, blue-green algae: excess sludge is 4: 1;
The biogas that produces is through desulphurization treatment and supplied user burning or centralized power generation; The natural pond slag that produces, as fertilizer sources imposes on the farmland.
Beneficial effect of the present invention:
1) self power consumption is low, only consume the energy 10%～15% that self produces winter, and conventional wet will consume the energy about 30%.
2) can directly handle blue-green algae, save the pre-treatment cost more than 50% than conventional wet.
3) influence of interference-free material of fermentation such as plastics, wooden unit, sandstone etc. need not to spend manpower and equipment detects it before fermentation.
4) biogas quality height, sulphur content is lower than wet method biogas, at 50～300ppm, can directly use fermented product gas efficiency height for methane fuelled engine without gas washing.
5) set up the solid fermentation chamber of moudle type, be convenient to enlarge and produce.
6) the fermentation residuum does not have the natural pond liquid of wet-fermentation, and without processed, the fermentation residuum is through simply sieving and the compost of short period of time promptly can be used as garden fertilizer or farm crop fertilizer, thereby storage and aftertreatment expense are low, are worth high.
7) water loss reduces more than 80% compared with wet method, does not almost have sewage discharge.
8) initial investment of blue algae fermentation technology, operation cost and Environmental costs reduce more than 30% all far below Wet technique.
Along with the Taihu Lake basin rapid economic development, TAIHU LAKE is polluted serious day by day, and body eutrophication causes blue-green algae to breed the initiation algal bloom in a large number, and feedwater ecology and water surrounding are brought major disaster; While, the disposal of municipal wastewater treatment plant excess sludge also became a great problem along with the increase of the face that focuses on of municipal wastewater, and not only expense is big for sludge disposal improperly, and causes secondary pollution easily.Adopt anaerobic fermentation technology to handle blue-green algae and sludged waste material, not only can obtain clean energy---biogas, and reach the purpose that low expense is administered blue-green algae pollution and mud, for the Sustainable development that realizes national economy provides safeguard.Simultaneously, along with the raising of rapid economic development and living standards of the people, the energy shortage problem will become the significant problem of the sustainable development that hinders national economy, must give enough attention, and adopt an effective measure and put forth effort to solve.Therefore, the technology of the present invention is significant for the energy, environment and the ecological problem of alleviating 21 century, and produces many interests, and huge market outlook are arranged.
Description of drawings
The biogas technology route is produced in Fig. 1 blue-green algae and mud mixed fermentation.
The cumulative gas of Fig. 2 blue-green algae and sludge anaerobic fermentation.
The methane content of Fig. 3 blue-green algae and sludge anaerobic fermentation.
Embodiment
Embodiment 1: the influence of blue-green algae and mud different material comparison anaerobically fermenting methane production
In the marsh gas fermentation processes, select suitable material ratio can digest blue-green algae to greatest extent on the one hand, improve the blue-green algae utilization ratio; Can significantly reduce the remaining natural pond slag of fermenting process on the other hand, effectively reduce second environmental pollution.
Fig. 2, Fig. 3 are respectively blue-green algae and granule sludge, digested sludge, excess sludge carry out anaerobically fermenting according to different material ratios cumulative gas and methane content situation.As seen from the figure, when the ratio of blue-green algae and granule sludge, digested sludge, excess sludge amount of dry matter was respectively 5-6:1,5:1,4:1, it is the highest that gas production rate and methane content all reach.With different mixed anaerobically fermentings, the C/N in the fermented liquid is than different with a kind of mud and blue-green algae, thereby causes gas production rate and methane content difference.Material ratio when different mud and blue-green algae hybrid anaerobic fermentation reach high yield tolerance and methane content is different, and this is because different mud bacterial classifications are formed and the different cause of methanogenesis activity.
Blue-green algae and mud hybrid anaerobic fermentation aerogenesis speed are very fast, first day gas production rate has accounted for about 35% of total gas production, its reason should be that the raw material that experiment is adopted is the blue-green algae that reached nine months staging life, partly or entirely stripping of nutritive ingredient, seed sludge nutrition supply abundance, fermentation reaction starts fast.The independent three kinds of mud that do not add blue-green algae respectively anaerobically fermenting gas production rate then seldom, less than 1/5 of mixed fermentation group, and the main component in the gas is N
2With a small amount of CO
2But the material of biological utilisation seldom in this explanation inoculum.And the blue-green algae anaerobically fermenting lacks certain inoculum separately, and its aerogenesis effect is not good yet.The cumulative gas of anaerobically fermenting and methane content were higher than other experimental group and control group far away when blue-green algae and granule sludge were 6:1 at material ratio, and maximum gas production rate is 138mL/d, and the gas production rate of unit mass blue-green algae reaches 73mL/gVS, and the product methane content is 50mLCH
4/ gVS, gas production rate is respectively blue-green algae and digested sludge, blue-green algae and excess sludge mixed fermentation 1.5,2.3 times.Therefore, can obtain higher aerogenesis effect with granule sludge as the inoculum of blue algae fermentation.
Embodiment 2: the variation of algae content of toxins in blue-green algae and the mud producing marsh gas through mixed anaerobic fermentation
The degraded situation of algae toxin is the key that solves the blue-green algae problem.Algae toxin degraded is very slow under the nature storage configuration, bibliographical information, and after the Taihu Lake blue-green algae was deposited 3 months naturally, its algae toxin MC-RR, MC-LR far surpassed drinking water standard still up to 38 μ g/kg, 120 μ g/kg.Measured the content of algae toxin before and after the blue-green algae anaerobically fermenting respectively, data see Table 1.
Table 1 blue-green algae and mud hybrid anaerobic fermentation algae toxin change
As shown in Table 1, the algae content of toxins of blue-green algae and granule sludge, digested sludge, excess sludge hybrid anaerobic fermentation group is respectively 366 μ g/L, 356 μ g/L, 244 μ g/L before the fermentation, but after the fermentation ends in the algae-residue algae content of toxins be lower than the detection lower limit 5 μ g/L of instrument, illustrate that the degradation rate of algae toxin under anaerobic state is far longer than the degradation rate that nature is deposited.Therefore, natural pond liquid, the natural pond slag as fertilizer sources that blue algae fermentation can be produced behind the biogas is used for flowers and trees, forest land etc.
Therefore, granule sludge is the best seed sludge of blue-green algae producing methane through anaerobic fermentation.Its TS degradation rate is 16.86%, the VS degradation rate be 13.73% and the COD clearance be 46.38%.The more important thing is that after anaerobic fermentation process finished, the content of blue-green algae algae toxin had been lower than the detection lower limit.This shows, blue-green algae and granule sludge producing marsh gas through mixed anaerobic fermentation not only can realize salvaging innoxious, the minimizing and the resource utilization of back blue-green algae disposal process, can also be with liquid natural pond, the natural pond slag as fertilizer sources behind the biogas fermentation.
Claims (1)
1, the method for a kind of blue-green algae and mud producing marsh gas through mixed anaerobic fermentation is characterized in that whole process is finished with blue-green algae and mud producing marsh gas through mixed anaerobic fermentation in anaerobic reactor, in reactor blue-green algae and mud are mixed, and feeds N then
2Cause anaerobic state, 35～37 ℃ of fermentations in reactor, are regularly added blue-green algae by phased manner, observe the corruption situation of raw material, measure the organic concentration of discharge material and the CH in the fermentation generation gas simultaneously
4, CO
2Concentration enters steady operational status until reactor;
Used mud is selected one or more in granule sludge, digested sludge, the excess sludge for use;
Select for use the butt weight ratio of blue-green algae and mud to be: blue-green algae: granule sludge is 5～6: 1, blue-green algae: digested sludge is 5: 1, blue-green algae: excess sludge is 4: 1;
The biogas that produces is through desulphurization treatment and supplied user burning or centralized power generation; The natural pond slag that produces, as fertilizer sources imposes on the farmland.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823768A (en) * | 2010-04-27 | 2010-09-08 | 同济大学 | Method for preparing flocculant, fertilizer and methane with algae-containing sludge |
| CN101831463A (en) * | 2010-06-04 | 2010-09-15 | 中国科学院青岛生物能源与过程研究所 | Method for preparing biogas by two-phase anaerobic fermentation of oil-extracted algae slag |
| CN102382860A (en) * | 2011-11-15 | 2012-03-21 | 江苏商达水务有限公司 | Method for producing biogas by using cyanobacteria as raw material |
| US8308944B2 (en) | 2009-03-20 | 2012-11-13 | Algal Scientific Corporation | System and method for treating wastewater via phototactic heterotrophic microorganism growth |
| CN102875210A (en) * | 2012-11-06 | 2013-01-16 | 南京农业大学 | Method for co-composting of blue-green algae and polluted bottom sediment |
| CN102994565A (en) * | 2012-12-20 | 2013-03-27 | 淮海工学院 | Method for enhancing anaerobic fermentation of algal waste liquid to generate methane |
| CN105174476A (en) * | 2015-09-28 | 2015-12-23 | 中国科学院城市环境研究所 | Activated sludge and microalgae coupled granular system for waste water treatment and establishment and operation method thereof |
| CN105255950A (en) * | 2015-11-06 | 2016-01-20 | 徐州生物工程职业技术学院 | Method for causing biogas digester to quickly enter into anaerobic state |
| CN105272420A (en) * | 2015-11-13 | 2016-01-27 | 云南云叶化肥股份有限公司 | Organic fertilizer containing blue algae and preparing method of organic fertilizer |
| CN105272446A (en) * | 2015-09-27 | 2016-01-27 | 常州市奥普泰科光电有限公司 | Method for preparing bioorganic fertilizer by using blue algae |
| CN109970496A (en) * | 2017-12-28 | 2019-07-05 | 潘秀艳 | A method of fertilizer is prepared using sludge |
| CN110642472A (en) * | 2019-10-24 | 2020-01-03 | 云南农业大学 | Mixed flocculant and method for treating cyanobacterial bloom by using same |
| CN110819661A (en) * | 2019-11-28 | 2020-02-21 | 湖南大学 | Method for producing volatile short-chain fatty acid by using bloom-forming cyanobacteria |
| CN112094870A (en) * | 2020-09-28 | 2020-12-18 | 南京师范大学 | Method for producing biogas by utilizing blue algae and bottom mud through co-fermentation |
| CN112239270A (en) * | 2020-09-28 | 2021-01-19 | 南京师范大学 | Novel material capable of being used as plant planting matrix, preparation method and application thereof |
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2008
- 2008-11-11 CN CNA2008101944518A patent/CN101418316A/en active Pending
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| US8308944B2 (en) | 2009-03-20 | 2012-11-13 | Algal Scientific Corporation | System and method for treating wastewater via phototactic heterotrophic microorganism growth |
| CN101823768A (en) * | 2010-04-27 | 2010-09-08 | 同济大学 | Method for preparing flocculant, fertilizer and methane with algae-containing sludge |
| CN101831463A (en) * | 2010-06-04 | 2010-09-15 | 中国科学院青岛生物能源与过程研究所 | Method for preparing biogas by two-phase anaerobic fermentation of oil-extracted algae slag |
| CN102382860A (en) * | 2011-11-15 | 2012-03-21 | 江苏商达水务有限公司 | Method for producing biogas by using cyanobacteria as raw material |
| CN102875210A (en) * | 2012-11-06 | 2013-01-16 | 南京农业大学 | Method for co-composting of blue-green algae and polluted bottom sediment |
| CN102994565A (en) * | 2012-12-20 | 2013-03-27 | 淮海工学院 | Method for enhancing anaerobic fermentation of algal waste liquid to generate methane |
| CN102994565B (en) * | 2012-12-20 | 2015-01-07 | 淮海工学院 | Method for enhancing anaerobic fermentation of algal waste liquid to generate methane |
| CN105272446A (en) * | 2015-09-27 | 2016-01-27 | 常州市奥普泰科光电有限公司 | Method for preparing bioorganic fertilizer by using blue algae |
| CN105174476A (en) * | 2015-09-28 | 2015-12-23 | 中国科学院城市环境研究所 | Activated sludge and microalgae coupled granular system for waste water treatment and establishment and operation method thereof |
| CN105174476B (en) * | 2015-09-28 | 2017-08-01 | 中国科学院城市环境研究所 | Activated sludge and microalgae coupling particle system and its structure and operation method for wastewater treatment |
| CN105255950A (en) * | 2015-11-06 | 2016-01-20 | 徐州生物工程职业技术学院 | Method for causing biogas digester to quickly enter into anaerobic state |
| CN105272420A (en) * | 2015-11-13 | 2016-01-27 | 云南云叶化肥股份有限公司 | Organic fertilizer containing blue algae and preparing method of organic fertilizer |
| CN109970496A (en) * | 2017-12-28 | 2019-07-05 | 潘秀艳 | A method of fertilizer is prepared using sludge |
| CN110642472A (en) * | 2019-10-24 | 2020-01-03 | 云南农业大学 | Mixed flocculant and method for treating cyanobacterial bloom by using same |
| CN110819661A (en) * | 2019-11-28 | 2020-02-21 | 湖南大学 | Method for producing volatile short-chain fatty acid by using bloom-forming cyanobacteria |
| CN112094870A (en) * | 2020-09-28 | 2020-12-18 | 南京师范大学 | Method for producing biogas by utilizing blue algae and bottom mud through co-fermentation |
| CN112239270A (en) * | 2020-09-28 | 2021-01-19 | 南京师范大学 | Novel material capable of being used as plant planting matrix, preparation method and application thereof |
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Open date: 20090429 |