CN211847929U - Straw and high ammonia nitrogen material combined dry anaerobic fermentation system - Google Patents
Straw and high ammonia nitrogen material combined dry anaerobic fermentation system Download PDFInfo
- Publication number
- CN211847929U CN211847929U CN201921611891.9U CN201921611891U CN211847929U CN 211847929 U CN211847929 U CN 211847929U CN 201921611891 U CN201921611891 U CN 201921611891U CN 211847929 U CN211847929 U CN 211847929U
- Authority
- CN
- China
- Prior art keywords
- anaerobic fermentation
- fermentation tank
- ammonia nitrogen
- biogas
- straw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a straw and high ammonia nitrogen material combined dry anaerobic fermentation system, which comprises a biomass crusher, wherein the biomass crusher is connected to a stage anaerobic fermentation tank through a straw conveying system; the anaerobic fermentation tank is connected to the mixing feeder and the biogas utilization unit; the mixing feeder is connected to the solid-liquid separator through a stage anaerobic fermentation tank, and the stage anaerobic fermentation tank is connected to the biogas utilization unit; the solid-liquid separator is communicated to the biogas liquid pool; the biogas liquid pool is communicated to an ammonia stripping tower, wherein the ammonia stripping tower is connected to a stage anaerobic fermentation tank. The utility model adopts the combined dry anaerobic fermentation technology, firstly utilizes the straw to carry out anaerobic bacteria propagation culture, and then carries out mixed fermentation with the excrement, thus realizing the high-concentration fermentation of the high ammonia nitrogen material; a dry anaerobic fermentation tank is adopted. The dry anaerobic fermentation tank is of plug flow type (non-complete mixing type), and the materials are gradually fermented in the moving process of the fermentation tank. Along with the anaerobic fermentation, ammonia nitrogen in the excrement is gradually released, and the concentration of the ammonia nitrogen is gradually improved.
Description
Technical Field
The utility model relates to an anaerobic fermentation system, in particular to dry anaerobic fermentation system is united with high ammonia nitrogen material to straw.
Background
As a big agricultural country, China has the top of the world in agricultural waste output. A large amount of straws and livestock and poultry manure are produced every year, and if the straws and the livestock and poultry manure are not properly treated, serious pollution is caused to rural environment. The anaerobic fermentation treatment of the agricultural wastes can simultaneously generate the biogas and the organic fertilizer, and has the advantages of reduction, harmlessness and recycling.
Among various anaerobic fermentation processes, the dry anaerobic fermentation pretreatment is simple, the occupied area is small, the biogas amount is small, and the method is an ideal method for treating agricultural wastes. However, the dry process employs a higher fermentation concentration, so that the accumulation of harmful substances in the fermentation tank is more serious than that in the wet anaerobic fermentation. Taking dry anaerobic fermentation of chicken manure as an example, the initial concentration with a solid content of 20% is generally adopted, and the ammonia nitrogen concentration after fermentation can reach more than 8000mg/l, which exceeds the tolerance range of anaerobic zymophyte to ammonia nitrogen, thus easily causing the methane content of the biogas to be reduced, even completely inhibiting the activity of anaerobic bacteria; the existing full-mixing anaerobic fermentation technology can only carry out low-concentration fermentation when treating high ammonia nitrogen materials. The material is diluted by adding water, and a large amount of biogas slurry is discharged. The existing dry anaerobic fermentation technology is easy to generate ammonia nitrogen inhibition and is difficult to treat high ammonia nitrogen materials such as pig manure, chicken manure and the like.
In order to solve the problems, the applicant develops a dry anaerobic fermentation system combining straws and high ammonia nitrogen materials.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art's defect, provide a dry process anaerobic fermentation system is united with high ammonia nitrogen material to straw.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model relates to a straw and high ammonia nitrogen material combined dry anaerobic fermentation system, which comprises a biomass crusher, wherein the biomass crusher is connected to a stage anaerobic fermentation tank through a straw conveying system;
the stage anaerobic fermentation tank is connected to the mixing feeder and the biogas utilization unit;
the mixing feeder is connected to a solid-liquid separator through a stage anaerobic fermentation tank, wherein,
the stage anaerobic fermentation tank is connected to the biogas utilization unit.
As a preferred technical proposal of the utility model, the solid-liquid separator is communicated to the biogas liquid pool;
the biogas liquid pool is communicated to an ammonia stripping tower, wherein,
the ammonia stripping tower is connected to the stage anaerobic fermentation tank.
As an optimized technical proposal of the utility model, the solid-liquid separator is connected to a biogas residue composting unit.
As an optimized technical proposal of the utility model, the ammonia stripping tower is connected to the biogas liquid irrigation unit.
As an optimized technical scheme of the utility model, the mixed feeder is connected with excrement and urine receiving tank
The utility model discloses the beneficial effect who reaches is: the utility model adopts the combined dry anaerobic fermentation technology, firstly utilizes the straw to carry out anaerobic bacteria propagation culture, and then carries out mixed fermentation with the excrement, thus realizing the high-concentration fermentation of the high ammonia nitrogen material; a dry anaerobic fermentation tank is adopted. The dry anaerobic fermentation tank is of plug flow type (non-complete mixing type), and the materials are gradually fermented in the moving process of the fermentation tank. Along with the anaerobic fermentation, ammonia nitrogen in the excrement is gradually released, and the concentration of the ammonia nitrogen is gradually improved. Even if ammonia nitrogen inhibition occurs, the ammonia nitrogen inhibition only occurs at the end stage of anaerobic reaction, most organic matters are converted into methane at the time, and the aim of anaerobic fermentation is basically achieved; the method comprises the following steps of (1) adopting a level-1 anaerobic fermentation tank and a level-2 anaerobic fermentation tank, wherein the level-1 tank adopts pure straw fermentation to enable anaerobic bacteria to be proliferated in advance, and then the anaerobic bacteria and excrement are mixed and enter the level-2 tank, so that the breeding of the anaerobic bacteria is ahead of the release of ammonia nitrogen of the excrement, and most organic matters are converted into methane by the anaerobic bacteria before the ammonia nitrogen is inhibited; ammonia nitrogen is used for blowing off, so that the ammonia nitrogen concentration in the biogas slurry is reduced, and then the biogas slurry is recycled, so that not only are strains provided for a 1-level anaerobic fermentation tank, but also the biogas slurry discharge amount of the whole system is reduced, and the pressure for dissolving the biogas slurry is reduced.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1. a biomass crusher; 2. a straw conveying system; 3. a grade 1 anaerobic fermentation tank; 4. 2-stage anaerobic fermentation tank; 5. a mixing feeder; 6. a feces receiving tank; 7. a biogas utilization unit; 8. a solid-liquid separator; 9. a biogas slurry pool; 10. an ammonia stripping tower; 11. a biogas residue composting unit; 12. biogas slurry irrigation unit.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
Examples
As shown in fig. 1, the utility model provides a straw and high ammonia nitrogen material combined dry anaerobic fermentation system, which comprises a biomass crusher 1, wherein the biomass crusher 1 is connected to a stage 1 anaerobic fermentation tank 3 through a straw conveying system 2, so as to convey the straws treated by the essential oil biomass crusher 1 into the stage 1 anaerobic fermentation tank 3;
the 1-stage anaerobic fermentation tank 3 is connected to a mixing feeder 5 and a biogas utilization unit 7; the mixing feeder 5 is connected to a solid-liquid separator 8 through a 2-stage anaerobic fermentation tank 4, wherein the 2-stage anaerobic fermentation tank 4 is connected to a biogas utilization unit 7.
Further, the solid-liquid separator 8 is communicated to a biogas liquid pool 9; the biogas liquid pool 9 is communicated to an ammonia stripping tower 10, wherein the ammonia stripping tower 10 is connected to the 1-stage anaerobic fermentation tank 3.
The solid-liquid separator 8 is connected to a biogas residue composting unit 11, the ammonia stripping tower 10 is connected to a biogas liquid irrigation unit 12, and the mixing feeder 5 is connected to a feces receiving tank 6.
Specifically, the implementation steps are as follows:
(1) the straws enter a biomass crusher 1 to be crushed, and the crushed particle size is below 4 cm.
(2) The straw conveying system 2 consists of a belt conveyor and a feeding screw and conveys straws into the 1-stage anaerobic fermentation tank 3. The feeding screw is a stainless steel shaftless screw conveyor, is arranged on the wall surface of the anaerobic fermentation tank, the front end of the screw inclines downwards at an angle of 45 degrees and extends below the liquid level of the anaerobic fermentation tank, and biogas is prevented from escaping from the screw.
(3) When the straw feeding, the return biogas slurry to the feed inlet of the 1-stage anaerobic fermentation tank 3, the straw: the biogas slurry ratio is 1: 1. The ammonia nitrogen concentration of the biogas slurry is lower than 2000mg/l, and the average ammonia nitrogen concentration of the material is lower than 1000 mg/l. If the adopted straws are dry, water is added to adjust the average water content to be less than 75 percent.
(4) The level 1 anaerobic fermentation tank 3 is a dry anaerobic fermentation tank and adopts side stirring. The fermentation temperature is medium temperature (36-38 deg.C), and the material retention time is 10-15 days. And (4) conveying the biogas generated by the fermentation tank into a biogas utilization unit for supplying heat, generating power or purifying the biogas.
(5) The manure is first poured into a manure receiving pit. The volume of the feces receiving groove should be designed to be above 1/2 of daily treatment capacity.
(6) The manure is uniformly delivered to the mixing feeder by a screw conveyor. Meanwhile, the contents of the 1-stage fermentation tank are proportionally conveyed to the mixing feeder to be used as the strains for the fecal fermentation. The two materials are uniformly stirred in a mixing feeder and pumped into a 2-stage anaerobic fermentation tank. Strain: the proportion of the excrement is equal to or more than 1/3.
(7) The 2-stage anaerobic fermentation tank 4 is a dry anaerobic fermentation tank and adopts side stirring. The fermentation temperature is medium temperature (36-38 deg.C), and the material retention time is 20-25 days. And (4) conveying the biogas generated by the fermentation tank into a biogas utilization unit for supplying heat, generating power or purifying the biogas.
(8) After the materials pass through the 2-stage anaerobic fermentation tank to produce biogas, the biogas is pumped to a solid-liquid separator for dehydration. Producing biogas residue and biogas slurry. Controlling the water content of the biogas residues to be 75-80%, and sending the biogas residues into a biogas residue composting unit. Discharging the biogas slurry into a biogas slurry tank for temporary storage.
(8) With the progress of 2-level anaerobic fermentation, a large amount of nitrogen in the excrement is converted into ammonia nitrogen, so the ammonia nitrogen content in the biogas slurry can reach 6000-. Limestone is added into the biogas slurry, the pH value is adjusted to 11-12, and then the biogas slurry is pumped to an ammonia stripping tower. And meanwhile, blowing air to the bottom of the stripping tower for gas-liquid exchange, wherein the gas-liquid ratio is 5000: 1. After stripping, the ammonia nitrogen removal rate is about 80%, and the ammonia nitrogen concentration is reduced to below 2000 mg/l.
(9) The biogas slurry quantitatively flows back to the 1-stage anaerobic fermentation tank (step 3), and the surplus biogas slurry enters the biogas slurry irrigation unit 12 and is returned to the field for utilization.
The utility model adopts the combined dry anaerobic fermentation technology, firstly utilizes the straw to carry out anaerobic bacteria propagation culture, and then carries out mixed fermentation with the excrement, thus realizing the high-concentration fermentation of the high ammonia nitrogen material; a dry anaerobic fermentation tank is adopted. The dry anaerobic fermentation tank is of plug flow type (non-complete mixing type), and the materials are gradually fermented in the moving process of the fermentation tank. Along with the anaerobic fermentation, ammonia nitrogen in the excrement is gradually released, and the concentration of the ammonia nitrogen is gradually improved. Even if ammonia nitrogen inhibition occurs, the ammonia nitrogen inhibition only occurs at the end stage of anaerobic reaction, most organic matters are converted into methane at the time, and the aim of anaerobic fermentation is basically achieved; the method comprises the following steps of (1) adopting a level-1 anaerobic fermentation tank and a level-2 anaerobic fermentation tank, wherein the level-1 tank adopts pure straw fermentation to enable anaerobic bacteria to be proliferated in advance, and then the anaerobic bacteria and excrement are mixed and enter the level-2 tank, so that the breeding of the anaerobic bacteria is ahead of the release of ammonia nitrogen of the excrement, and most organic matters are converted into methane by the anaerobic bacteria before the ammonia nitrogen is inhibited; ammonia nitrogen is used for blowing off, so that the ammonia nitrogen concentration in the biogas slurry is reduced, and then the biogas slurry is recycled, so that not only are strains provided for a 1-level anaerobic fermentation tank, but also the biogas slurry discharge amount of the whole system is reduced, and the pressure for dissolving the biogas slurry is reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A dry anaerobic fermentation system combining straws and high ammonia nitrogen materials is characterized by comprising a biomass crusher (1), wherein,
the biomass crusher (1) is connected to a level 1 anaerobic fermentation tank (3) through a straw conveying system (2);
the 1-stage anaerobic fermentation tank (3) is connected to a mixing feeder (5) and a biogas utilization unit (7);
the mixing feeder (5) is connected to a solid-liquid separator (8) through a 2-stage anaerobic fermentation tank (4), wherein,
the 2-stage anaerobic fermentation tank (4) is connected to the biogas utilization unit (7).
2. The system for straw and high ammonia nitrogen material combined dry anaerobic fermentation according to claim 1, wherein the solid-liquid separator (8) is communicated to a biogas liquid pool (9);
the biogas liquid pool (9) is communicated to an ammonia stripping tower (10), wherein,
the ammonia stripping tower (10) is connected to the stage 1 anaerobic fermentation tank (3).
3. The straw and high ammonia nitrogen material combined dry anaerobic fermentation system according to claim 1 or 2, characterized in that the solid-liquid separator (8) is connected to a biogas residue composting unit (11).
4. The system for the combined dry anaerobic fermentation of straw and high ammonia nitrogen material according to claim 2, characterized in that the ammonia stripping tower (10) is connected to a biogas slurry irrigation unit (12).
5. The system for the combined dry anaerobic fermentation of straw and high ammonia nitrogen materials as claimed in claim 1, wherein the mixing feeder (5) is connected with a manure receiving tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921611891.9U CN211847929U (en) | 2019-09-26 | 2019-09-26 | Straw and high ammonia nitrogen material combined dry anaerobic fermentation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921611891.9U CN211847929U (en) | 2019-09-26 | 2019-09-26 | Straw and high ammonia nitrogen material combined dry anaerobic fermentation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211847929U true CN211847929U (en) | 2020-11-03 |
Family
ID=73130386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921611891.9U Active CN211847929U (en) | 2019-09-26 | 2019-09-26 | Straw and high ammonia nitrogen material combined dry anaerobic fermentation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211847929U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114853164A (en) * | 2022-05-17 | 2022-08-05 | 中节能工程技术研究院有限公司 | Combined treatment method and treatment device for white spirit vinasse and high-concentration brewing wastewater |
| CN114853165A (en) * | 2022-05-17 | 2022-08-05 | 中节能工程技术研究院有限公司 | Combined treatment method of white spirit distiller's grains with high rice husk content and high-concentration brewing wastewater |
-
2019
- 2019-09-26 CN CN201921611891.9U patent/CN211847929U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114853164A (en) * | 2022-05-17 | 2022-08-05 | 中节能工程技术研究院有限公司 | Combined treatment method and treatment device for white spirit vinasse and high-concentration brewing wastewater |
| CN114853165A (en) * | 2022-05-17 | 2022-08-05 | 中节能工程技术研究院有限公司 | Combined treatment method of white spirit distiller's grains with high rice husk content and high-concentration brewing wastewater |
| CN114853165B (en) * | 2022-05-17 | 2023-12-19 | 中节能工程技术研究院有限公司 | Combined treatment method for distilled spirit vinasse with high rice hull content and high-concentration brewing wastewater |
| CN114853164B (en) * | 2022-05-17 | 2024-03-01 | 中节能工程技术研究院有限公司 | Combined treatment method and treatment device for distilled spirit vinasse and high-concentration brewing wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102703514B (en) | Kitchen waste disposal method and anaerobic fermentation reaction device | |
| Callaghan et al. | Co-digestion of waste organic solids: batch studies | |
| KR100966279B1 (en) | Manufacture system of compost and liquid fertilizer from livestock excretion | |
| CN105713928A (en) | Kitchen waste treating technology | |
| CN108998359B (en) | Anaerobic reactor for producing biogas by mixed fermentation of pig manure and straws | |
| CN104662157A (en) | Method for implementing zero emission biogas slurry in pure straw anaerobic digestion | |
| CN102352380A (en) | Food residue and sludge mixing anaerobic treatment method and system | |
| CN101973682A (en) | Wet and dry coupling anaerobic fermentation process method | |
| CN211847929U (en) | Straw and high ammonia nitrogen material combined dry anaerobic fermentation system | |
| CN104098236A (en) | New wastewater treatment process of large livestock feeding farm | |
| CN107285822A (en) | A kind of dead livestock and poultry harmless treatment process | |
| WO2012018908A2 (en) | Digester for high solids waste | |
| CN114058482A (en) | Anaerobic digestion system for improving biogas production efficiency | |
| CN102010113B (en) | Anaerobic solid reactor | |
| CN102154372B (en) | Method for producing methane by means of fermentation with jet mixing technology | |
| CN102732564A (en) | Method for comprehensive treatment on high-water content organic waste | |
| KR101289053B1 (en) | Sludge Reduction by Combined Fermentation and Reconstruction Method | |
| CN108774081A (en) | A kind of resource utilization method of feces of livestock and poultry | |
| CN215328056U (en) | Torpedo type anaerobic reactor | |
| KR19990000316A (en) | Livestock Manure Properties Fermentation Treatment Apparatus and Method | |
| CN210573440U (en) | Scenic spot ecological toilet management station | |
| CN209759268U (en) | Sludge treatment system | |
| CN113430101A (en) | Efficient cooperative resource utilization method for livestock and poultry manure and silage straws | |
| CN114378105A (en) | Kitchen waste and cellulose biomass synergistic multi-stage treatment system and method | |
| CN202658153U (en) | Anaerobic fermentation reaction device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |