CN1923732A - Method of preparing marsh gas from spartina alterniflora - Google Patents
Method of preparing marsh gas from spartina alterniflora Download PDFInfo
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- CN1923732A CN1923732A CNA2006101161453A CN200610116145A CN1923732A CN 1923732 A CN1923732 A CN 1923732A CN A2006101161453 A CNA2006101161453 A CN A2006101161453A CN 200610116145 A CN200610116145 A CN 200610116145A CN 1923732 A CN1923732 A CN 1923732A
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- alterniflora loisel
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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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- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The invention discloses a preparing method of marsh gas based on high-effective anaerobic ferment of interflower-rice-straw in the resource and environmental technological domain, which comprises the following steps: predisposing interflower-rice-straw; adding N element material in the interflower-rice-straw; adjusting the ratio of carbon and nitrogen at 20:1-30:1; putting in the ferment device; seeding; fermenting; finishing one ferment period through 20-60d. The ferment method contains single-phase non-revolving ferment method, single-phase inner-revolving ferment method and solid-liquid ferment method.
Description
Technical field
The invention belongs to the resource and environment technical field, being specifically related to a kind of is the method that fermenting raw materials prepares biogas with spartina alterniflora loisel.
Background technology
Spartina alterniflora loisel (Spartina aterniflora) originates in the U.S., is a kind of plant of sabkha for many years that is grown in the tideland.The spartina alterniflora loisel plant is sturdy tall and big, the root system hypertrophy, floor level generally can reach 1.0～2.0m, root system gos deep into can reaching about 1.5m in the soil, have stronger wind resistance disappear wave, protect the effect at beach shore protection, created land with silt, greening seabeach.China's Coastal Areas often was subjected to natural disasteies such as storm wave, typhoon at that time and attacked, and coastland economy and people's lives and properties are subjected to very big harm.At the beginning of 1980, the spartina alterniflora loisel introduces the coastal beach of China, made major contribution in many-sides such as the improvement of protecting beach shore protection, created land with silt, promotion economy development of coastal area, ecotope and mitigations, but through 20 years of development, the spartina alterniflora loisel forms 50,000 hm in China's Coastal Areas
2Above Alien invasive species advantage group brings a series of negative impact to the coastland.The spartina alterniflora loisel is as the alien species with extremely strong fecundity, its growth is prosperous, breeding is fast, plant Gao Ermi with native country species dog-eat-dog, has changed the view on mud matter light beach and the habitat of native country species, for example the spartina alterniflora loisel occupies the place that intertidal shellfish is cultured, cause the shellfish carelessly can't be free movable in the beach at intensive rice, with Kang Shengchang, even can death by suffocation; Some shellfishes have to migrate to rice carelessly outside the beach; Some harbor districts also because spartina alterniflora loisel's intrusion alluvial is accelerated, influence ship and come in and go out.Summer and autumn the spartina alterniflora loisel fallen leaves along with tidewater drifts about everywhere, enter the algal culture ground in beach or shallow sea, will be to laver, production of marine algas such as sea-tangle and the certain influence of the quality of product generation.
The measure of administering the spartina alterniflora loisel at present has: (1) physical method mainly is manually to reach mechanical removal, and the manpower and materials of consumption are big, inefficiency; (2) chemical process use weedicide, but weedicide can only be removed the face of land usually with top, and is relatively poor for seed in the beach soil and root system effect, and has pollution problem; (3) biological method, the biological control of using animal natural enemy and pathogenic microorganism also is exotic species still in the experimental phase as its natural enemy of Alien invasive species and pathogenic microorganism, has great ecological risk.These measures exist many drawbacks and deficiency, can not fundamentally administer the spartina alterniflora loisel.Spartina alterniflora loisel in the face of huge biomass like this regards them as a kind of Energy resources and carries out the biogas fermentation utilization, and report is not at home and abroad also arranged at present.
Summary of the invention
The object of the present invention is to provide and a kind ofly can improve seabeach space resources economic benefit, ecological benefits and what improve the ecological environment is the method that fermenting raw materials prepares biogas with spartina alterniflora loisel.
What the present invention proposed is the method that fermenting raw materials prepares biogas with spartina alterniflora loisel, and its concrete steps are as follows:
(1) raw material spartina alterniflora loisel's pulverizing pre-treatment;
(2) interpolation contains the N elemental substance in the pre-treatment spartina alterniflora loisel of step (1) gained, mixes, and obtains compound, and the carbon-nitrogen ratio of control compound is 20: 1--30: 1;
(3) gained compound in the step (2) is put in the fermentation unit, and the adding inoculum is inoculated, obtain fermentation raw material, raw material specifically add with vaccination ways according to fermentation process and different, concrete fermentation process comprises three classes: single-phase not circulating fermentation method, single-phase internal recycle fermentation process or solid-liquid two phase fermentation methods etc.;
(4) add water in the fermentation raw material in step (3), add-on is that the water surface is higher than fermentation raw material 5cm at least;
(5) sealing fermentation unit, the air outlet of fermentation unit connects accumulator unit by gas pipe line, and control reaction temperature is carried out fermentation gas at 30-40 ℃, can produce biogas, i.e. target product through 1-2 days; Fermentation was through 20-60 days, but the organic substance of the anaerobic biodegradation among the spartina alterniflora loisel is converted into biogas by action of microorganisms substantially, and when fermentation unit reacts gas production rate every day when reducing significantly, reaction can finish, and carries out new round fermentation.
Among the present invention, the described N of containing elemental substance is one to multiple kinds such as urea, bicarbonate of ammonia or feces of livestock and poultry.
Among the present invention, described inoculum be in natural pond slag, natural pond liquid or the anaerobically digested sludge etc. any.
Among the present invention, in the step (3), when selecting single-phase not circulating fermentation method, the dry weight dosage of inoculum is no less than and adds 20% of raw material spartina alterniflora loisel dry weight.
Among the present invention, in the step (3), when selecting single-phase circulating fermentation method, the dry weight dosage of inoculum is no less than and adds 20% of raw material spartina alterniflora loisel dry weight.
Among the present invention, in the step (3), when selecting solid-liquid two phase fermentation methods, fermentation raw material is not inoculated and directly is added to solid feed management reactor, and liquid microbial management reaction vessel inoculum size is pressed reaction volume and calculated 16000-20000mg/l.
Among the present invention, the pulverizing pre-treatment of described spartina alterniflora loisel's raw material can be taked following ordinary method: with harvested spartina alterniflora loisel's over-ground part, be cut into the segment of 2～3cm by artificial or mechanical means; Perhaps it is carried out pre-treatment etc. by stalk rubbing pulverizer.
Among the present invention,, select the different fermentations method according to the technical qualification and the demand of different user.Can select different fermentation process to have: single-phase not circulating fermentation method, single-phase internal recycle fermentation process, solid-liquid two phase fermentation methods etc.
Single-phase not circulation means: present method is directly mixed raw material and inoculum to be added in the simple biogas reaction unit and is fermented, the dry weight dosage of inoculum is no less than and adds 20% of raw material dry weight, after reaction finishes, need all empty reactor and carry out the new round inoculation that feeds intake.Advantage is directly to utilize original methane-generating pit to utilize the spartina alterniflora loisel, and equipment is simple, and easy handling and management relatively are fit to peasant household and use.
Single-phase internal circulation method: present method is directly mixed raw material and inoculum to be added in the simple biogas reaction unit and is fermented, and the dry weight dosage of inoculum is no less than and adds 20% of raw material dry weight.After reacting beginning, regularly by outer power, such as pump, with the top of the liquid circulation in the reaction unit bottom to reaction unit, the increase microorganism contacts with raw material, to improve reaction efficiency.After reaction finishes, need all empty reactor and carry out the new round inoculation that feeds intake.Advantage is the reaction efficiency height, and fermentation period is short, can improve gas production rate and the volume that reduces reaction unit, relatively is fit to the reasonable user of technical qualification and utilizes the spartina alterniflora loisel to produce biogas.
Solid-liquid two phase fermentation methods: present method reaction unit comprises two reaction vessels, is respectively solid feed Manage Containers and liquid microbial Manage Containers; The solid feed Manage Containers is used to add spartina alterniflora loisel's raw material, does not need when adding raw material to inoculate, and only connects to add raw material and get final product; The liquid microbial Manage Containers is used for the microbial inoculant management, do not add reaction raw materials, only inoculate inoculum and calculate 16000-20000mg/l by reactor volume, in this reactor, add a certain amount of filler during inoculation, as plastic filler, glass sphere filler, slag etc., dam mud in the methane-producing reactor rests in the reactor microorganism to greatest extent.After the reaction beginning, regularly by outer power, as pump, the liquid of solid feed Manage Containers is extracted in the liquid microbial Manage Containers, the spillage with the liquid microbial Manage Containers is back in the solid feed Manage Containers again.The organic matter that is dissolved in the liquid of solid feed Manage Containers can produce biogas in the fermentation of liquid microbial Manage Containers very soon so on the one hand, on the other hand, the liquid microbial Manage Containers is back to the microorganism in the liquid of solid feed Manage Containers, progressively finishes the inoculation of solid feed Manage Containers.After reaction finishes, only need all empty the residue in the solid feed Manage Containers, directly drop into raw material, can carry out new round fermentation, not need again liquid towards microorganism Manage Containers to inoculate.The advantage of this device is to improve the efficient of reaction unit greatly, shortens the fermentation period of raw material, increases gas production rate, simultaneously, reduces the inoculation workload, relatively is fit to the spartina alterniflora loisel that utilizes of the good mass-producing of technical qualification.
Among the present invention, when fermentation unit reacts gas production rate every day when reducing significantly, this day gas production rate is lower than 30% of average daily output tolerance, stopped reaction, the beginning new round that feeds intake again reaction.
Advantage of the present invention: the present invention has fully realized spartina alterniflora loisel's resource utilization, minimizing and innoxious utilization, and the evil of destroying ecotope and harm marine economy is careless---the spartina alterniflora loisel transforms into a kind of energy-source plant.Because be subjected to the influence of natural condition, national spartina alterniflora loisel's unit surface productivity difference is bigger, but according to present research substantially in 2-5kg/ (dry-matter) scope, take the mean according to 3kg/m
2(dry-matter); The whole nation has ten thousand mu of spartina alterniflora loisel's area 80-100 at present, considers multiple factor affecting such as ecological protection, calculates by yield rate 80%, gets 700,000 mu of harvest areas; Natural community is considered in the consideration of comprehensive above two aspects merely, and can gather in the crops spartina alterniflora loisel's biomass resource amount and reach 140,000 tons (dry-matteies) national every year.Can reach 0.2-0.3m according to research spartina alterniflora loisel dry-matter production potential
3/ kg, above raw material altogether can aerogenesis 2800-4200 ten thousand stere biogas, can substitute ten thousand tons of standard coals of 3-5.
Description of drawings
Fig. 1 is embodiment 1 a daily gas discharge curve.
Fig. 2 is embodiment 2 daily gas discharge curves.
Fig. 3 is embodiment 3 daily gas discharge curves.
Embodiment
Further specify the present invention below by embodiment.
Embodiment 1:
Certain man of peasant household utilizes the spartina alterniflora loisel to prepare biogas.
(1) raw material spartina alterniflora loisel's pre-treatment; With harvested spartina alterniflora loisel's over-ground part, be cut into the segment of 2～3cm by artificial or mechanical means;
(2) interpolation contains N elemental substance urea 5kg in the spartina alterniflora loisel 250kg of step (1) gained, mixes, and adjusts the carbon-nitrogen ratio of compound, and making the C/N in the compound is 20: 1;
(3) gained compound in the step (2) is put in 4 cubic metres the common biogas fermentation device, and to add the inoculum water content be 80% anaerobically digested sludge 500kg, obtain fermentation raw material;
(4) add water in the fermentation raw material in step (3), be higher than fermentation raw material 5cm until the water surface;
(5) sealing fermentation unit, the air outlet of fermentation unit connects accumulator unit by gas pipe line, control reaction temperature is 30-35 ℃, carry out fermentation gas, react and promptly began aerogenesis on the 2nd day, reaction has been carried out 36 days, reacts gas production rate every day and reduces significantly, finishes one and takes turns reaction and carry out another and take turns and feed intake and inoculate.
Connect deaphragm gas meter on the escape pipe of accumulator unit in step (5), carry out the metering of biogas volume every day, daily output tolerance the results are shown in Figure 1, and total gas production is 35 cubic metres, and it is 0.26m that the pond holds factor of created gase
3/ m
3D.
Embodiment 2:
Certain small business utilizes the spartina alterniflora loisel to prepare biogas.
(1) raw material spartina alterniflora loisel's pre-treatment; With harvested spartina alterniflora loisel's over-ground part, be cut into the segment of 2～3cm by artificial or mechanical means;
(2) interpolation contains N elemental substance bicarbonate of ammonia 30kg in the spartina alterniflora loisel 1250kg of step (1) gained, mixes, and adjusts the carbon-nitrogen ratio of compound; The C/N that makes compound is 30: 1;
(3) gained compound in the step (2) being put into volume is in 20 cubic metres of single-phase internal recycle fermentation units, and adds inoculum natural pond liquid and inoculate for 5 cubic metres, obtains fermentation raw material;
(4) add water in the fermentation raw material in step (3), be higher than fermentation raw material 20cm until the water surface;
(5) sealing fermentation unit, the air outlet of fermentation unit connects accumulator unit by gas pipe line, control reaction temperature is 60-65 ℃ and carries out fermentation gas, through 43 days, organic substance among the spartina alterniflora loisel is converted into biogas by action of microorganisms, promptly get desired product, when fermentation unit reacts gas production rate every day when reducing significantly, reaction finishes.
Connect deaphragm gas meter on the escape pipe of accumulator unit in step (5), carry out the metering of biogas volume every day, daily output tolerance the results are shown in Figure 2, and total gas production is 293.5 cubic metres, and it is 0.34m that the pond holds factor of created gase
3/ m
3D.
Embodiment 3:
Certain medium-sized enterprise utilizes the spartina alterniflora loisel to prepare biogas.
(1) raw material spartina alterniflora loisel's pre-treatment:, be cut into the segment of 2～3cm by artificial or mechanical means with harvested spartina alterniflora loisel's over-ground part;
(2) solid feed management fermentation unit: the pretreated spartina alterniflora loisel's raw material of 6250kg is added in 100 cubic metres of solid feeds management fermentation units, adds urea 125kg and make that carbon-nitrogen ratio reaches 25: 1 in the mixed solution;
(3) liquid microbial management reaction unit: it is in 20 cubic metres of liquid microbial management reaction units that the polyethylene ball filler of 5 cubic metres of volumes is put into volume, adding inoculum water content is 80% anaerobically digested sludge 2500kg, add a certain amount of water, leave the space of 20cm on reactor top;
(4) sealing fermentation unit, the air outlet of fermentation unit connects accumulator unit by gas pipe line, under natural temperature, carry out fermentation gas, through 43 days, organic substance among the spartina alterniflora loisel is converted into biogas by action of microorganisms, promptly get desired product, when fermentation unit reacts gas production rate every day when reducing significantly, reaction finishes.
Connect deaphragm gas meter on the escape pipe of accumulator unit in step (5), carry out the metering of biogas volume every day, daily output tolerance the results are shown in Figure 3, and total gas production is 1215 cubic metres, and it is 0.28m that the pond holds factor of created gase
3/ m
3D.
Claims (6)
1, a kind of is the method that fermenting raw materials prepares biogas with spartina alterniflora loisel, it is characterized in that concrete steps are as follows:
(1) raw material spartina alterniflora loisel's pulverizing pre-treatment;
(2) interpolation contains the N elemental substance in the pre-treatment spartina alterniflora loisel of step (1) gained, mixes, and obtains compound, and the carbon-nitrogen ratio of control compound is 20: 1--30: 1;
(3) gained compound in the step (2) is put in the fermentation unit, and the adding inoculum is inoculated, obtain fermentation raw material, specifically add with vaccination ways according to fermentation process and different, concrete fermentation process comprises three classes: single-phase not circulating fermentation method, single-phase internal recycle fermentation process or solid-liquid two phase fermentation methods;
(4) add water in the fermentation raw material in step (3), add-on is that the water surface is higher than fermentation raw material 5cm at least;
(5) sealing fermentation unit, the air outlet of fermentation unit connects accumulator unit by gas pipe line, and control reaction temperature is carried out fermentation gas at 30-40 ℃, can produce biogas, i.e. target product through 1-2 days; Fermentation was through 20-60 days, but the organic substance of anaerobic biodegradation is converted into biogas by microbial process substantially among the spartina alterniflora loisel, and when fermentation unit reacts gas production rate every day when reducing significantly, this day gas production rate is lower than 30% o'clock of average daily output tolerance, reaction can finish, and carries out new round fermentation.
2, according to claim 1 is the method that fermenting raw materials prepares biogas with spartina alterniflora loisel, it is characterized in that the described N of containing elemental substance is an one to multiple kind in urea, bicarbonate of ammonia or the feces of livestock and poultry.
3, according to claim 1 is the method that fermenting raw materials prepares biogas with spartina alterniflora loisel, it is characterized in that described inoculum be in natural pond slag, natural pond liquid or the anaerobically digested sludge any.
4, according to claim 1 is the method that fermenting raw materials prepares biogas with spartina alterniflora loisel, it is characterized in that in the step (3), and when selecting single-phase not circulating fermentation method, the dry weight dosage of inoculum is no less than and adds 20% of raw material spartina alterniflora loisel dry weight.
5, according to claim 1 is the method that fermenting raw materials prepares biogas with spartina alterniflora loisel, it is characterized in that in the step (3), and when selecting single-phase circulating fermentation method, the dry weight dosage of inoculum is no less than and adds 20% of raw material spartina alterniflora loisel dry weight.
6, according to claim 1 is the method that fermenting raw materials prepares biogas with spartina alterniflora loisel, it is characterized in that in the step (3), when selecting solid-liquid two phase fermentation methods, fermentation raw material is not inoculated and directly is added to solid feed management reactor, and liquid microbial management reaction vessel inoculum size is pressed reaction volume and calculated 16000-20000mg/l.
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| CNB2006101161453A CN100410194C (en) | 2006-09-18 | 2006-09-18 | Method of preparing marsh gas from spartina alterniflora |
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| CNB2006101161453A CN100410194C (en) | 2006-09-18 | 2006-09-18 | Method of preparing marsh gas from spartina alterniflora |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985636A (en) * | 2010-11-30 | 2011-03-16 | 淮阴师范学院 | Method for preparing marsh gas by fermentation of external invasive plant alternanthera philoxeroides serving as raw material |
| CN104620777A (en) * | 2015-02-06 | 2015-05-20 | 福建农林大学 | Method for determining optimum picking time of perennial energy plants special for marsh gas |
| CN105016799A (en) * | 2015-06-26 | 2015-11-04 | 云南福湾农业科技有限公司 | Biogas slurry fermentation raw material, and method using raw material to ferment biogas slurry |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2267253Y (en) * | 1996-10-28 | 1997-11-12 | 孟祥聚 | Gas producer by gasifying plant |
| CN2603806Y (en) * | 2003-01-14 | 2004-02-18 | 赵可军 | Methane generator |
| CN1742545A (en) * | 2005-09-29 | 2006-03-08 | 南京大学 | Method for controlling foreign spartina alterniflora loisel by biological substitution |
-
2006
- 2006-09-18 CN CNB2006101161453A patent/CN100410194C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985636A (en) * | 2010-11-30 | 2011-03-16 | 淮阴师范学院 | Method for preparing marsh gas by fermentation of external invasive plant alternanthera philoxeroides serving as raw material |
| CN104620777A (en) * | 2015-02-06 | 2015-05-20 | 福建农林大学 | Method for determining optimum picking time of perennial energy plants special for marsh gas |
| CN104620777B (en) * | 2015-02-06 | 2016-08-10 | 福建农林大学 | A kind of method determining perennial biogas dedicated energy plant optimal harvest time |
| CN105016799A (en) * | 2015-06-26 | 2015-11-04 | 云南福湾农业科技有限公司 | Biogas slurry fermentation raw material, and method using raw material to ferment biogas slurry |
| CN105016799B (en) * | 2015-06-26 | 2018-05-15 | 云南福湾农业科技有限公司 | Biogas slurry fermentation raw material and the method using the fermenting raw materials biogas slurry |
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