CN113331037A - Soilless culture biogas slurry treatment system and method - Google Patents
Soilless culture biogas slurry treatment system and method Download PDFInfo
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- CN113331037A CN113331037A CN202110646899.4A CN202110646899A CN113331037A CN 113331037 A CN113331037 A CN 113331037A CN 202110646899 A CN202110646899 A CN 202110646899A CN 113331037 A CN113331037 A CN 113331037A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G31/00—Soilless cultivation, e.g. hydroponics
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
- A01C23/001—Sludge spreaders, e.g. liquid manure spreaders
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
- A01C23/007—Metering or regulating systems
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G18/00—Cultivation of mushrooms
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/15—Leaf crops, e.g. lettuce or spinach
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/60—Flowers; Ornamental plants
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Abstract
The invention discloses a soilless culture biogas slurry treatment system which comprises a collection part, a filtering part and a culture part, wherein the collection part is used for collecting and precipitating crude biogas slurry, a liquid outlet of the collection part is communicated with an inlet of the filtering part through a pipeline and conveys the biogas slurry into the filtering part, and an outlet of the filtering part is connected with the culture part and conveys the filtered biogas slurry to a substrate layer of the culture part. The soil cultivation biogas slurry treatment system can treat biogas slurry, can utilize nutrient components of the biogas slurry to carry out soilless culture substrate for crop cultivation, can reduce biogas slurry treatment energy consumption, improve biogas slurry treatment economy, improve energy utilization efficiency, and has good market application prospect.
Description
Technical Field
The invention relates to the field of biogas slurry treatment. More particularly, the invention relates to a soilless culture biogas slurry treatment system and a method.
Background
The biomass anaerobic fermentation process has great development prospect in rural areas and pastoral areas in China and is a main treatment mode for the large-scale livestock and poultry raising excrement in China. However, the existing anaerobic fermentation process in the market has low solid content and lacks of an effective biogas slurry treatment and disposal technology, so that a large amount of generated biogas slurry is difficult to be effectively absorbed and utilized. If the waste water is directly discharged into the environment, the pathogenic microorganisms, organic pollutants and the like contained in the waste water can cause remarkable secondary pollution. The traditional biogas slurry treatment means mainly prepares organic fertilizer, but the process has long time consumption, low energy utilization rate and difficult control of the quality of finished products, and the industrialized production mode has relatively complex process and more intermediate links, thus easily causing the increase of treatment cost.
Disclosure of Invention
In order to realize further utilization of anaerobic fermentation biogas slurry and reduce the influence on the environment, the invention provides a soilless culture biogas slurry treatment system which comprises a collection part, a filtering part and a culture part, wherein the collection part is used for collecting and precipitating crude biogas slurry, a liquid outlet of the collection part is communicated with an inlet of the filtering part through a pipeline and used for conveying the biogas slurry into the filtering part, and an outlet of the filtering part is connected to the culture part and used for conveying the filtered biogas slurry to a substrate layer of the culture part.
According to a preferred embodiment of the invention, the soilless culture biogas slurry treatment system is characterized in that the culture part is vertically inclined at a certain angle in the longitudinal direction, and the outlet of the filter part is connected to the top end of the culture part and faces the substrate layer of the culture part.
According to a preferred embodiment of the soilless culture biogas slurry treatment system, the filtering part comprises four filtering layers which are sequentially installed along the flowing and filtering direction of biogas slurry, and the size of filtering particles of each filtering layer is gradually reduced along the flowing and filtering direction of the biogas slurry.
According to a preferred embodiment of the invention, the bottom of the collecting part is provided with a biogas residue outlet which is connected with a biogas fermentation tank through a pipeline.
According to a preferred embodiment of the invention, the soilless culture biogas slurry treatment system is characterized in that the cultivation part comprises a first cultivation part, a second cultivation part and a third cultivation part which are sequentially connected through a pipeline, the first cultivation part, the second cultivation part and the third cultivation part are transversely arranged in parallel, the first cultivation part, the second cultivation part and the third cultivation part are vertically and obliquely arranged, the upper end of the first cultivation part is connected to the outlet of the filtering part through a pipeline, the lower end of the first cultivation part is connected to the top end of the second cultivation part through a pipeline, and the lower end of the second cultivation part is connected to the top end of the third cultivation part through a pipeline.
According to a preferred embodiment of the invention, the lower end of the third cultivation part is connected to a collection tank through a pipeline, and a water quality detection unit is arranged in the collection tank to monitor the water quality in the collection tank.
According to a preferred embodiment of the invention, the soilless culture biogas slurry treatment system is characterized in that the filter part comprises a filter shell and four filter layers arranged in the filter shell;
the collecting pool is connected with a space in the filtering shell below the lowest filtering layer through a pipeline, and a solenoid valve and a water pump are arranged on the pipeline between the collecting pool and the space;
the control unit is simultaneously connected with the water quality detection unit and the water quality electromagnetic valve,
when the water quality detection unit detects that the water quality of the water in the collection tank does not reach the standard, the control unit controls the electromagnetic valve and the water pump to be automatically opened so as to convey the water in the collection tank to a space below a filter layer positioned at the lowest position in the filter shell for secondary filtration.
According to a preferred embodiment of the invention, when the water quality detection unit detects that the water quality of the water in the collection tank reaches the standard, the control unit can open and control the electromagnetic valve and the water pump to be opened according to instructions so as to pump the water in the collection tank into a space below the lowest filter layer in the filter shell and backwash the filter part.
The invention also provides a method for treating the biogas slurry for soil cultivation, which comprises the following steps:
step one, after the crude biogas slurry is precipitated by the collecting part, the obtained biogas slurry is conveyed into the filtering part;
secondly, conveying the biogas slurry filtered by the filtering part to the top end of the cultivation part which is obliquely arranged, and pouring the biogas slurry onto a substrate at the bottom of the cultivation part;
and step three, conveying the biogas slurry flowing out through the substrate at the bottom of the cultivation part into the collection pool.
According to a preferred embodiment of the invention, the soilless culture biogas slurry treatment method comprises the steps that the culture part comprises a first culture part, a second culture part and a third culture part which are sequentially connected through a pipeline, the first culture part, the second culture part and the third culture part are horizontally arranged in parallel, the first culture part, the second culture part and the third culture part are vertically arranged in an inclined mode, the lower end of the first culture part is connected to the top end of the second culture part through a pipeline, and the lower end of the second culture part is connected to the top end of the third culture part through a pipeline.
The invention at least comprises the following beneficial effects: the system for treating the biogas slurry for the soil cultivation can treat the biogas slurry, can also carry out nutrition treatment on the soilless cultivation substrate by utilizing the nutrient components of the biogas slurry, can improve the energy utilization efficiency, reduce the energy consumption of biogas slurry treatment, and simultaneously improve the economy of biogas slurry treatment, and has good market application prospect.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of a soilless culture biogas slurry treatment system in the invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
As shown in fig. 1, an embodiment of the present invention provides a soilless culture biogas slurry treatment system, which includes a collection portion 1, a filtration portion 2 and a culture portion 3, wherein the collection portion 1 is used for collecting and precipitating crude biogas slurry, a liquid outlet of the collection portion is communicated with an inlet of the filtration portion 2 through a pipeline, the biogas slurry is conveyed into the filtration portion 2, an outlet of the filtration portion 2 is connected to the culture portion 3, and the filtered biogas slurry is conveyed to a substrate layer of the culture portion 3.
Based on the traditional biogas slurry treatment means, organic fertilizers are mainly prepared, and the process not only consumes a large amount of energy and causes the reduction of energy utilization rate, the cutting process is complex, the intermediate links are many and causes the increase of treatment cost, but the biogas slurry generated by anaerobic fermentation has rich nutrient elements required by plants such as nitrogen, phosphorus, potassium and the like, which are just required by the growth of a plurality of plants, so the embodiment provides a new method for treating the biogas slurry by combining soilless culture, wherein the crude biogas slurry is firstly stood and precipitated in the collection part 1, the stood and purified biogas slurry is conveyed to the filtering part 2 for further filtering, solid residues in the slurry are filtered and removed, and finally the filtered biogas slurry is conveyed to the substrate layer of the culture part 3, the nutrient cost is input into the substrate layer, and the substrate absorbs the nutrient elements in the biogas slurry, the matrix can also play a further purifying effect on the biogas slurry, and compared with the traditional biogas slurry treatment mode: a large amount of energy and processes are consumed to treat the biogas slurry to obtain the organic fertilizer, and then the organic fertilizer is used for fertilizing plants to supplement nutrients.
For the watering convenience, will cultivation portion 3 sets up and is vertical slope, the exit linkage of filter house 2 in the top of cultivation portion 3, and towards the matrix layer of cultivation portion 3. Therefore, manual irrigation is not needed, biogas slurry can directly flow down from the top end of the cultivation part 3, and the substrate at the lower end of the cultivation part 3 is automatically irrigated, so that the substrate is fully covered, and more energy and time are saved.
In another preferred embodiment, the filtering part 2 comprises four filtering layers 21 which are sequentially installed along the flowing and filtering direction of the biogas slurry, the size of the filtering particles of each filtering layer is gradually reduced along the flowing and filtering direction of the biogas slurry, the biogas slurry is sequentially filtered, and gaps among the filtering particles are reduced along the gradual reduction of the size of the filtering particles, so that dregs with smaller sizes in the biogas slurry can be filtered. And in order to prevent the filtering particles of different filtering layers 21 from being washed disorderly along with the long-term washing of the biogas slurry, a filter screen can be arranged between two adjacent filtering layers 21, and the mesh size of the filter screen is between the sizes of the filtering particles of the two filtering layers 21.
In order to fully utilize the solid biogas residue part in the crude biogas slurry without causing waste, a biogas residue outlet is arranged at the bottom of the collecting part 1 and is connected with a biogas fermentation tank 4 through a pipeline. Discharging biogas residues generated by standing, precipitating and separating to a biogas fermentation tank 4 for further treatment, wherein the biogas fermentation tank 4 can adopt a conventional biogas fermentation tank.
Considering the factors of product diversification, economic applicability and the like, in another embodiment of the present application, the cultivation part 3 is provided as a plurality of plates connected in series, so that a variety of plants can be planted, each plate is used for planting a plant, the variety is diversified, economic benefits are improved, economic utility of the whole system is improved, and space is saved, if a single cultivation part is adopted, the vertical inclination is arranged, if a large number of plants are desired, the height of the cultivation part is too high, which results in large occupied area and inconvenient construction, and here below, the number of plates of the cultivation part 3 can be adjusted according to actual conditions, and a specific scheme is provided below:
In order to reduce the conveying cost of the biogas slurry, the whole transportation process is realized by utilizing the gravity action of the biogas slurry without the help of external power, and the following design is carried out: the upper end of the first cultivating portion 31 is connected to the outlet of the filter portion 2 through a pipe, the lower end of the first cultivating portion 31 is connected to the top end of the second cultivating portion 32 through a pipe, and the lower end of the second cultivating portion 32 is connected to the top end of the third cultivating portion 33 through a pipe.
Therefore, the biogas slurry can flow downwards from the top end of the first cultivation part 33 under the action of gravity, when the bottom biogas slurry is accumulated enough, the biogas slurry slowly flows upwards from the bottom of the second cultivation part 32 and then continuously flows downwards from the top end of the fourth cultivation part 33, the whole process is not required to be lifted by a water pump, power is not adopted in the whole process, the flow rate is slow, excessive washing of the matrix is avoided, loss of ingredients in the matrix is avoided, the whole arrangement not only reduces the transportation cost, but also ensures that the matrix absorbs nutrients, and meanwhile, the matrix is not washed.
In another preferred embodiment, the soilless culture biogas slurry treatment system is characterized in that the lower end of the third culture part 33 is connected to the collecting tank 5 through a pipeline, and a water quality detection unit is arranged in the collecting tank 5 to monitor the water quality of the water in the collecting tank 5.
In another preferred embodiment, the filter part 2 comprises a filter housing 22 and four filter layers 21 arranged therein;
the collecting tank 1 is connected with a space below the lowest filtering layer in the filtering shell 22 through a pipeline, and a solenoid valve and a water pump are arranged on the pipeline between the collecting tank and the space;
the control unit is simultaneously connected with the water quality detection unit and the water quality electromagnetic valve,
when the water quality detection unit detects that the water quality of the water in the collecting tank does not reach the standard, the control unit controls the electromagnetic valve and the water pump to be opened so as to pump the water in the collecting tank 1 into a space below the lowest filtering layer in the filtering shell 22 for secondary filtering;
when the water quality detecting unit detects that the water quality of the water in the collecting tank 1 reaches the standard, the control unit can also open and control the electromagnetic valve and the water pump according to instructions so as to pump the water in the collecting tank 1 into a space below a filter layer positioned at the lowest part in the filter shell body 22 to back flush the filter part.
After the biogas slurry is treated by the cultivation part 3, if the water quality of the biogas slurry reaches the standard, the biogas slurry can be normally discharged, if the water quality of the biogas slurry does not reach the standard, the biogas slurry is continuously controlled and conveyed to the filtering part 2 for filtering, and if the water quality of the biogas slurry reaches the standard, the biogas slurry reaching the standard can be used for performing back washing on the filtering layer to prevent the filtering layer from being blocked.
According to a preferred embodiment of the present invention, the soilless culture biogas slurry processing system is characterized in that the bottom substrate of the first cultivation part 31 adopts wood filler for planting mushroom, agaric and other fungus crops, the bottom substrate of the second cultivation part 32 adopts porous substrate for planting salt-tolerant crops such as salt-tolerant flowers and other salt-tolerant crops, and the third cultivation part 33 adopts sponge substrate for planting eggplant, carrot and other edible vegetables.
It should be further emphasized that the order of the first cultivating portion 31, the second cultivating portion 32 and the third cultivating portion 33 may not be adjusted arbitrarily, and as will be described in detail below,
the first cultivation part 31 is used for cultivating fungus crops, the fungus crops show strong salinity tolerance in the cultivation process, can absorb organic matters and salinity in part of culture solution, and do not have a transpiration effect, so that the aim of reducing the conductivity is achieved, the salinity can be reduced within a certain range by changing the planting density of the fungi, and the biogas slurry is further suitable for cultivating salt-tolerant plants.
The second cultivation part 32 is a salt tolerant plant which has a certain effect of reducing salt content during growth, but the effect is not significant due to transpiration. After the biogas slurry enters non-salt-tolerant plants, namely the vegetable cultivation end, the salinity is slightly increased. The effluent is continuously recycled to the third cultivation part 33, so that the effect of reducing the salinity can be achieved to a certain extent.
The biogas slurry in the third cultivating section 33 is absorbed by the crops in the first and second cultivating sections 31 and 32, and can be used for planting edible vegetables with higher economic value,
the opposite sequence can lead the related crops not to adapt to the chemical environment provided by the biogas slurry, lead to poor growth or no growth, and can not achieve the effect of improving the water quality. For example, if edible vegetables are planted in the first planting part 31, the vegetables will wither under the action of high-concentration salt, and if salt-tolerant crops are planted in the first planting part 31, the salt concentration will be increased due to transpiration.
The biogas slurry treatment system does not exclude the need of additionally supplementing external water sources for debugging and stabilizing the system in the initial operation stage, the planting scale of fungi and salt-tolerant plants obviously influences the water quality of yielding water, and the design suggests that the planting quantity and the planting density of the fungi are adjusted according to the actual conductivity.
Table 1 growth of the cultivated fungi and the set crops is given in the following table:
*0 indicates that the plant did not grow or die
TABLE 2 composition of each stage at about 24 weeks of operation
As can be seen from the data in tables 1 and 2, the biogas slurry is suitable for the growth of crops. After the survival rate of the plants is stable, the solid content and the conductivity show a descending trend, and various nutrient substance indexes of the effluent are obviously lower than those of the biogas slurry;
the other embodiment of the invention also provides a soilless culture biogas slurry treatment method, which comprises the following steps:
step one, after the crude biogas slurry is precipitated by the collecting part, the obtained biogas slurry is conveyed into the filtering part;
secondly, conveying the biogas slurry filtered by the filtering part to the top end of the cultivation part which is obliquely arranged, and pouring the biogas slurry onto a substrate at the bottom of the cultivation part;
and step three, conveying the biogas slurry flowing out through the substrate at the bottom of the cultivation part into the collection pool.
According to a preferred embodiment of the invention, the soilless culture biogas slurry treatment method comprises the steps that the culture part comprises a first culture part, a second culture part and a third culture part which are sequentially connected through a pipeline, the first culture part, the second culture part and the third culture part are horizontally arranged in parallel, the first culture part, the second culture part and the third culture part are vertically arranged in an inclined mode, the lower end of the first culture part is connected to the top end of the second culture part through a pipeline, and the lower end of the second culture part is connected to the top end of the third culture part through a pipeline.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. The utility model provides a soilless culture natural pond liquid processing system, its characterized in that, includes collection portion, filter house and cultivation portion, collection portion is used for collecting, deposits crude natural pond liquid, its liquid outlet pass through the pipeline communicate in the import of filter house, carry natural pond liquid extremely in the filter house, the exit linkage of filter house in cultivation portion to the matrix layer of cultivation portion carries through filterable natural pond liquid.
2. A soilless culture biogas slurry processing system according to claim 1, wherein the cultivation part is vertically inclined, and the outlet of the filtering part is connected to the top end of the cultivation part and faces the substrate layer of the cultivation part.
3. The soilless culture biogas slurry treatment system according to claim 2, wherein the filtering part comprises four filtering layers sequentially installed along the flowing and filtering direction of the biogas slurry, and the size of the filtering particles of each filtering layer is gradually reduced along the flowing and filtering direction of the biogas slurry.
4. A soilless culture biogas slurry treatment system according to claim 1, wherein the bottom of the collection part is provided with a biogas residue outlet which is connected to the biogas fermentation tank through a pipeline.
5. The soilless culture biogas slurry processing system according to claim 1, wherein the cultivation part comprises a first cultivation part, a second cultivation part and a third cultivation part which are connected in sequence through pipelines, the first cultivation part, the second cultivation part and the third cultivation part are arranged in parallel, longitudinally or stacked transversely, the first cultivation part, the second cultivation part and the third cultivation part are all arranged in a vertically inclined mode, the upper end of the first cultivation part is connected to the outlet of the filtering part through a pipeline, the lower end of the first cultivation part is connected to the top end of the second cultivation part through a pipeline, and the lower end of the second cultivation part is connected to the top end of the third cultivation part through a pipeline.
6. A soilless culture biogas slurry treating system according to claim 5, wherein the lower end of the third culture part is connected to a collecting tank through a pipeline, and a water quality detecting unit is arranged in the collecting tank to monitor the water quality in the collecting tank.
7. A soilless culture biogas slurry treating system according to claim 6, wherein the filtering part comprises a filtering shell and four layers of filtering layers arranged inside the filtering shell;
the collecting pool is connected with a space in the filtering shell below the lowest filtering layer through a pipeline, and a solenoid valve and a water pump are arranged on the pipeline between the collecting pool and the space;
the control unit is simultaneously connected with the water quality detection unit and the water quality electromagnetic valve,
when the water quality detection unit detects that the water quality of the water in the collection tank does not reach the standard, the control unit controls the electromagnetic valve and the water pump to be opened so as to pump the water in the collection tank into a space below the filter layer positioned at the lowest position in the filter shell for secondary filtration.
8. The soilless culture biogas slurry processing system according to claim 7, wherein when the water quality detecting unit detects that the water quality in the collecting tank does not meet the standard, the control unit controls the electromagnetic valve and the water pump to be automatically opened so as to convey the water in the collecting tank to a space below the lowest filtering layer in the filtering shell for secondary filtering.
When the water quality detecting unit detects that the water quality of the water in the collecting tank does not reach the standard, the control unit can also open and control the electromagnetic valve and the water pump according to the instruction so as to pump the water in the collecting tank into a space below a filter layer positioned at the lowest position in the filter shell to back flush the filter part.
9. A soilless culture biogas slurry treatment method according to any one of claims 1-8, characterized by comprising the steps of:
step one, after the crude biogas slurry is precipitated by the collecting part, the obtained biogas slurry is conveyed into the filtering part;
secondly, conveying the biogas slurry filtered by the filtering part to the top end of the cultivation part which is obliquely arranged, and pouring the biogas slurry onto a substrate at the bottom of the cultivation part;
and step three, conveying the biogas slurry flowing out through the substrate at the bottom of the cultivation part into the collection pool.
10. A soilless culture biogas slurry processing method according to claim 9, wherein the cultivation part comprises a first cultivation part, a second cultivation part and a third cultivation part which are connected in sequence through pipelines, the first cultivation part, the second cultivation part and the third cultivation part are arranged in parallel, the first cultivation part, the second cultivation part and the third cultivation part are all vertically arranged in an inclined manner, the lower end of the first cultivation part is connected to the top end of the second cultivation part through a pipeline, and the lower end of the second cultivation part is connected to the top end of the third cultivation part through a pipeline.
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| CN115818898A (en) * | 2023-01-03 | 2023-03-21 | 华南农业大学 | Biogas slurry desalting system |
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