CN104120151A - Dry anaerobic fermentation technology for preparing biogas from blue algae, reed, and paddy rice straw - Google Patents
Dry anaerobic fermentation technology for preparing biogas from blue algae, reed, and paddy rice straw Download PDFInfo
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- CN104120151A CN104120151A CN201410334984.7A CN201410334984A CN104120151A CN 104120151 A CN104120151 A CN 104120151A CN 201410334984 A CN201410334984 A CN 201410334984A CN 104120151 A CN104120151 A CN 104120151A
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- reed
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- rice straw
- anaerobic fermentation
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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
Abstract
The invention relates to a dry anaerobic fermentation technology for preparing biogas from blue algae, reed, and paddy rice straw. The technology comprises the following steps: (1) grinding the raw materials; (2) subjecting the grinded raw materials to wet fermentation; (3) mixing; (4) subjecting the mixture to dry anaerobic fermentation; (5) purifying the biogas. The technology comprises the specific steps as follows: mixing blue algae with a water content of 90 to 95% and livestock and poultry manure according to a mass ratio of 5:(1-2) to carry out wet fermentation; fetching 1/4 to 1/3 of the stem tip in the upper end section of reeds, grinding, then mixing the grinded reed with grinded paddy rice straw according to a mass ratio of 1:(1-3) so as to obtain a mixed material; mixing the biogas slurry after the wet fermentation and biogas residue (blue algae) with the mixed material according to a mass ratio of (2-2.5):1, then carrying out dry anaerobic fermentation for 20 to 40 d at a temperature of 25 to 55 DEG C so as to obtain the biogas which is taken as a novel energy. The whole technology does not generate any secondary pollution, and converts blue algae, reed and paddy rice straw into resources.
Description
Technical field
The present invention relates to a kind of technique of dry anaerobic fermentation producing methane, relate in particular to the technique of a kind of blue-green algae, reed and rice straw dry anaerobic fermentation producing methane.
Background technology
The bacterium of blue-green algae (Cyanobateria) and tool protokaryon etc. together, Dan Liwei Prokaryota.All blue-green algaes all contain the blue pigment of a kind of special blue-green algae (cyanobacteria), and blue-green algae hence obtains one's name exactly.Along with the degree of body eutrophication in recent years increases the weight of, blue-green algae amount reproduction, and formed one deck blue-greenish colour and had the offscum of stench taste at the water surface annual summer.Large-scale blue algae bloom can cause the deterioration of water quality, exhausts water oxygen gas and cause the death of fish when serious.More seriously, in blue-green algae, some kind (as Microcystis aeruginosa) also can produce toxin (being called for short MC), contains a large amount of MC in about 50% blue-green algae.MC, except directly fish, people and animals being produced murder by poisoning, is also the major incentive of liver cancer.At present, blue-green algae does not have method of disposal timely and effectively after salvaging, and major part is storage on the spot all, produces foul odour, and natural pond liquid is back in river in addition, serious to the secondary pollution of water body.
Reed, the tall grass of aquatic or humidogene for many years, is grown in by irrigation ditch, river levee swampland etc., all has growth all over the world.Nowadays most reed is not all utilized well, has a large amount of reeds to run its course every year, when causing the wasting of resources, also very serious to the secondary pollution of water body.
Rice straw is remaining cauline leaf part after the ripe threshing of paddy rice.In recent years, peasant seldom utilizes rice straw to use as cooking fuel, because do not have again at present effectively comprehensive utilization of resources method, peasant can only directly burn most rice straw in field for rush-harvesting and rush-planting.Severe contamination environment, in addition, also there is very large potential safety hazard.
Accumulate over a long period, blue-green algae after corruption, the reed after decaying and the straw burning remaining incessant after repeated prohibition will bring serious pollution to area surroundings and water quality.
A kind of blue-green algae, reed and rice straw dry anaerobic fermentation producing methane technique, realized the comprehensive resource disposal and utilization to blue-green algae, reed and rice straw.In treating processes, produce without sewage, without the natural pond liquid problem of dissolving, residues can be made into organic fertilizer, substantially realizes zero pollutant discharge.
Summary of the invention
The object of this invention is to provide the technique of a kind of blue-green algae, reed and rice straw dry anaerobic fermentation producing methane.Employing dry method the principle of fermentation, through pulverizing, stir a series of processes such as wet fermentation mixing and anaerobically fermenting, prepares novel energy biogas by blue-green algae, reed and the rice straw with potential hazard.
Technical scheme of the present invention is: the technique of a kind of blue-green algae, reed and rice straw dry method fermentation producing methane, and its concrete steps are as follows:
(1) raw material pulverizing: reed stem nose part and rice straw are ground into respectively to segment; Then by the reed after pulverizing and rice straw in mass ratio for 1:(1～3) to be mixed to get crushed material for subsequent use for ratio;
(2) wet fermentation: be 90～95% blue-green algaes and feces of livestock and poultry 5:(1～2 in mass ratio by quality water ratio) ratio mix the fermentation of wetting;
(3) mix: natural pond liquid that the crushed material that step (1) is obtained produces with wet fermentation, natural pond slag enter mixing device together with in proportion and be uniformly mixed; Wherein natural pond liquid, the total mass of natural pond slag and the mass ratio of crushed material are 2～2.5:1;
(4) dry anaerobic fermentation: the material holding temperature after being uniformly mixed is carried out to dry anaerobic fermentation under 25～55 DEG C of conditions;
(5) marsh gas purifying: the biogas of collecting, after purifying, is stored in gas-holder.
Preferred above-mentioned reed stem tip is divided into the stem apex part that intercepts whole reed length 1/4～1/3; Reed stem nose part and rice straw are ground into respectively the segment that length is 1～5cm.
Preferably above-mentioned feces of livestock and poultry is any one or a few in chicken, duck, goose, pig, ox or sheep excrement.
The wet fermentation condition fermentation of wetting routinely.Preferably the fermentation period of above-mentioned dry anaerobic fermentation is 20～40d.The biogas that fermentation produces is derived from top, anaerobically fermenting pond.The biogas of collecting, after purifying, is stored in gas-holder.
Dry straw powder has good water-absorbent, can fully absorb the moisture in blue-green algae, to reach the requirement to moisture while entering reaction unit, realizes full response process without sewage discharge simultaneously.
Beneficial effect:
1, in dry method fermentation, dry straw powder has good water-absorbent, can fully absorb the moisture in blue-green algae, to reach the requirement to moisture while entering reaction unit, realizes full response process without sewage discharge simultaneously.
2, blue-green algae mix with chicken poultry manure wet fermentation after natural pond liquid, natural pond slag carry out anaerobic dry fermentation with dry straw compound again, ensured the inoculum of dry straw compound anaerobically fermenting.
3, stalk and blue-green algae have been made to biogas, biogas also can be used for follow-up generating or as boiler oil gas of zymotechnique etc., has realized " turning waste into wealth ".
Brief description of the drawings
Fig. 1 is the process flow sheet of dry method fermentation producing methane.
Embodiment
The process flow sheet of following examples producing methane is as shown in Figure 1:
Embodiment 1
The blue-green algae of getting 15kg water ratio 95% mixes with 3kg chicken manure the fermentation of wetting, and obtains natural pond liquid and natural pond slag is for subsequent use after fermentation.
Intercept reed front end 1/4 stem apex part, respectively the reed stem nose part of rice straw and intercepting be ground into the segment that mean length is 1cm, by the rice straw after pulverizing and reed in mass ratio 2:1 ratio to be mixed to get crushed material for subsequent use.
The natural pond slag of getting the above-mentioned crushed material of 9kg gained after above-mentioned wet fermentation enters mixing device together with the liquid of natural pond, and after being uniformly mixed, material enters dry-process anaerobic fermentation device together, and under 35 DEG C of conditions of constant temperature water bath, anaerobic dry fermentation 30d, collects aerogenesis 0.72m
3.
Embodiment 2
The blue-green algae of getting 15kg water ratio 90% mixes with 4kg duck excrement the fermentation of wetting, and obtains natural pond liquid and natural pond slag is for subsequent use after fermentation.
Intercept reed front end 1/3 stem apex part, respectively the reed stem nose part of rice straw and intercepting be ground into the segment that mean length is 2cm, by the rice straw after pulverizing and reed in mass ratio 1:1 ratio to be mixed to get crushed material for subsequent use.
The natural pond slag of getting the above-mentioned crushed material of 8kg gained after above-mentioned wet fermentation enters mixing device together with the liquid of natural pond, and after being uniformly mixed, material enters dry-process anaerobic fermentation device together, and under 25 DEG C of conditions of constant temperature water bath, anaerobic dry fermentation 25d, collects aerogenesis 0.68m
3.
Embodiment 3
The blue-green algae of getting 15kg water ratio 90% mixes with 5kg pig manure the fermentation of wetting, and obtains natural pond liquid and natural pond slag is for subsequent use after fermentation.
Intercept reed front end 1/3 stem apex part, respectively the reed stem nose part of rice straw and intercepting be ground into the segment that mean length is 4cm, by the rice straw after pulverizing and reed in mass ratio 3:1 ratio to be mixed to get crushed material for subsequent use.
The natural pond slag of getting the above-mentioned crushed material of 9kg gained after above-mentioned wet fermentation enters mixing device together with the liquid of natural pond, and after being uniformly mixed, material enters dry-process anaerobic fermentation device together, and under 55 DEG C of conditions of constant temperature water bath, anaerobic dry fermentation 40d, collects aerogenesis 0.62m
3.
Subordinate list 1 each example produces biogas test item degree
Claims (4)
1. the technique of blue-green algae, reed and rice straw dry anaerobic fermentation producing methane, its concrete steps are as follows:
(1) raw material pulverizing: reed stem nose part and rice straw are ground into respectively to segment; Then by the reed after pulverizing and rice straw in mass ratio for 1:(1～3) to be mixed to get crushed material for subsequent use for ratio;
(2) wet fermentation: be 90～95% blue-green algaes and feces of livestock and poultry 5:(1～2 in mass ratio by quality water ratio) ratio mix the fermentation of wetting;
(3) mix: natural pond liquid that the crushed material that step (1) is obtained produces with wet fermentation, natural pond slag enter mixing device together with in proportion and be uniformly mixed; Wherein natural pond liquid, the total mass of natural pond slag and the mass ratio of crushed material are 2～2.5:1;
(4) dry anaerobic fermentation: the material holding temperature after being uniformly mixed is carried out to dry anaerobic fermentation under 25～55 DEG C of conditions; (5) marsh gas purifying: the biogas of collecting, after purifying, is stored in gas-holder.
2. technique according to claim 1, is characterized in that described reed stem tip is divided into the stem apex part that intercepts whole reed length 1/4～1/3; Reed stem nose part and rice straw are ground into respectively the segment that length is 1～5cm.
3. technique according to claim 1, is characterized in that described feces of livestock and poultry is any one or a few in chicken, duck, goose, pig, ox or sheep excrement.
4. technique according to claim 1, is characterized in that the fermentation period of described dry anaerobic fermentation is 20～40d.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556612A (en) * | 2014-12-04 | 2015-04-29 | 山东春藤食品有限公司 | Processing process of pig excrement |
| CN104762332A (en) * | 2015-04-23 | 2015-07-08 | 合肥工业大学 | Method for improving efficiency of blue-green algae or straw anaerobic methane production process |
| CN105603000A (en) * | 2016-01-26 | 2016-05-25 | 安徽大地节能科技有限公司 | Technology for preparing marsh gas from water hyacinth, wheat straw and rice straw |
| CN105967768A (en) * | 2016-06-12 | 2016-09-28 | 江苏三正华禹环境工程有限公司 | Method for preparing organic fertilizer through blue-green algae, reeds and straw |
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| CN101921049A (en) * | 2010-09-21 | 2010-12-22 | 同济大学 | Method and device for producing methane by using dry anaerobic digestion for urban sludge and organic matter |
| CN101935149A (en) * | 2010-04-09 | 2011-01-05 | 河北东旭投资集团有限公司 | Stabilizing device for tin bath hot-end glass strip |
| CN103204718A (en) * | 2013-04-28 | 2013-07-17 | 么向和 | Comprehensive utilization method of livestock and poultry manures and crop straw resources |
| CN103420737A (en) * | 2012-05-23 | 2013-12-04 | 林金宝 | Method for producing saline-alkali soil improving fertilizer by utilization livestock and poultry manure of culturing farms |
| CN103755405A (en) * | 2013-12-26 | 2014-04-30 | 苏州科大微龙信息技术有限公司 | Ferment organic base fertilizer for rice and preparation method thereof |
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2014
- 2014-07-14 CN CN201410334984.7A patent/CN104120151A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935149A (en) * | 2010-04-09 | 2011-01-05 | 河北东旭投资集团有限公司 | Stabilizing device for tin bath hot-end glass strip |
| CN101921049A (en) * | 2010-09-21 | 2010-12-22 | 同济大学 | Method and device for producing methane by using dry anaerobic digestion for urban sludge and organic matter |
| CN103420737A (en) * | 2012-05-23 | 2013-12-04 | 林金宝 | Method for producing saline-alkali soil improving fertilizer by utilization livestock and poultry manure of culturing farms |
| CN103204718A (en) * | 2013-04-28 | 2013-07-17 | 么向和 | Comprehensive utilization method of livestock and poultry manures and crop straw resources |
| CN103755405A (en) * | 2013-12-26 | 2014-04-30 | 苏州科大微龙信息技术有限公司 | Ferment organic base fertilizer for rice and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556612A (en) * | 2014-12-04 | 2015-04-29 | 山东春藤食品有限公司 | Processing process of pig excrement |
| CN104762332A (en) * | 2015-04-23 | 2015-07-08 | 合肥工业大学 | Method for improving efficiency of blue-green algae or straw anaerobic methane production process |
| CN105603000A (en) * | 2016-01-26 | 2016-05-25 | 安徽大地节能科技有限公司 | Technology for preparing marsh gas from water hyacinth, wheat straw and rice straw |
| CN105967768A (en) * | 2016-06-12 | 2016-09-28 | 江苏三正华禹环境工程有限公司 | Method for preparing organic fertilizer through blue-green algae, reeds and straw |
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Application publication date: 20141029 |