CN114213162A - Submerged plant recycling treatment method and device - Google Patents

Submerged plant recycling treatment method and device Download PDF

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Publication number
CN114213162A
CN114213162A CN202111510545.3A CN202111510545A CN114213162A CN 114213162 A CN114213162 A CN 114213162A CN 202111510545 A CN202111510545 A CN 202111510545A CN 114213162 A CN114213162 A CN 114213162A
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tank
submerged plant
filtrate
composting
full
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李魁晓
赵丽君
蒋勇
刘学峰
阜崴
田雅琦
贺赟
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Beijing Drainage Group Co Ltd
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Beijing Drainage Group Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F11/00—Other organic fertilisers
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F29/00—Cutting apparatus specially adapted for cutting hay, straw or the like
    • A01F29/005—Cutting apparatus specially adapted for cutting hay, straw or the like for disintegrating and cutting up bales of hay, straw or fodder
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F29/00—Cutting apparatus specially adapted for cutting hay, straw or the like
    • A01F29/06—Cutting apparatus specially adapted for cutting hay, straw or the like having rotating knives with their cutting edges on a cylinder surface, e.g. of the helical-type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/14—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing operating with only one screw or worm
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/20—Liquid fertilisers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/06—Nutrients for stimulating the growth of microorganisms
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Environmental Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Botany (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Molecular Biology (AREA)
  • Fertilizers (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention belongs to the field of submerged plant resource utilization, and discloses a submerged plant resource treatment method and device. The device comprises a feeding device, a cutting crusher, a screw press, a pressing liquid storage tank and a composting device, and optionally further comprises a submersible sewage pump and a hydrolysis acidification tank; the feeding equipment, the cutting crusher and the screw press are connected in sequence; the screw press is provided with a filtrate outlet pipeline and a filter residue outlet pipeline; a filtrate outlet pipeline is connected with the squeezed liquid storage pool; the filter residue outlet pipeline is connected with the composting equipment; the submersible sewage pump is arranged in the pressing liquid storage tank and used for sending the filtrate flowing into the pressing liquid storage tank from the screw press into the hydrolysis acidification tank. The invention forms submerged plant resources into a closed loop with sustainable development, and accords with the concepts of circular economy and green sustainable development.

Description

Submerged plant recycling treatment method and device
Technical Field
The invention belongs to the field of submerged plant resource utilization, and particularly relates to a submerged plant resource treatment method and device.
Background
Submerged plants are plant groups of whole plant bodies submerged under water, belong to large-scale herbaceous plants, and are widely applied to water ecological restoration engineering in recent years, and the purpose of reducing water eutrophication is achieved by regularly harvesting and removing nutrient substances such as nitrogen and phosphorus in the system. Research shows that the harvesting amount of the submerged plant can reach 1-3kg/m in the season of vigorous growth of the plant31 ten thousand m in storage capacity3The yield of the submerged plants in the lake can reach 200-600 tons in one year, and the subsequent resource utilization gradually becomes a hot spot. The main current modes of use are feed development and composting. However, for safety reasons, submerged plants harvested from natural water bodies with good water quality can be used for feed development, and the problem of subsequent treatment of submerged plants harvested from reclaimed water bodies (such as wetland parks) (the water rate is generally 80-90%, the submerged plants cannot be directly used for composting, and the composting process is suitable for substances with low water content (60% -70%) is not solved well.
Therefore, at present, a method and a device for recycling submerged plants are urgently needed to be provided to solve the problem of the subsequent treatment of the submerged plants harvested in the reclaimed water area.
Disclosure of Invention
The invention aims to provide a method and a device for recycling submerged plants, aiming at the defects of the prior art. The invention forms submerged plant resources into a closed loop of sustainable development, and accords with the concepts of circular economy and green sustainable development.
In order to achieve the above object, the present invention provides a submerged plant resource treatment apparatus, which comprises a feeding device, a cutting crusher, a screw press, a pressing liquid storage tank and a composting device, and optionally further comprises a submersible sewage pump and a hydrolysis acidification tank;
the feeding equipment, the cutting crusher and the screw press are connected in sequence;
the screw press is provided with a filtrate outlet pipeline and a filter residue outlet pipeline;
the filtrate outlet pipeline is connected with the squeezed liquid storage pool;
the filter residue outlet pipeline is connected with the composting equipment;
the submersible sewage pump is arranged in the squeezing liquid storage tank and used for sending the filtrate flowing into the squeezing liquid storage tank from the screw press into the hydrolysis acidification tank.
The invention provides a resource treatment method for submerged plants, which adopts the resource treatment device for the submerged plants, and comprises the following steps:
s1: crushing and dehydrating the submerged plant to obtain filtrate and filter residue;
s2: composting the filter residue to prepare organic nutrient soil;
s3: directly taking the filtrate as a liquid fertilizer or a liquid carbon source; optionally, before the filtrate is used as a liquid carbon source, the filtrate is subjected to hydrolytic acidification treatment.
The technical scheme of the invention has the following beneficial effects:
the invention can recycle organic fertilizer and liquid carbon source generated after the resource treatment of submerged plants harvested from reclaimed water areas (such as wetland parks) to wetland parks terrestrial plants and subsurface flow wetland, thereby reducing the fertilizer application amount of the wetland parks and solving the problem of low denitrification efficiency caused by the carbon source deficiency of the reclaimed water replenishing subsurface flow wetland, so that the submerged plant resources form a closed loop of sustainable development and accord with the concepts of circular economy and green sustainable development.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 is a schematic view showing a submerged plant recycling apparatus provided in embodiment 1 of the present invention.
Fig. 2 shows a process flow chart of a submerged plant recycling method provided in embodiment 1 of the present invention.
The reference numerals are explained below:
1-a feeding bin; 2-a feeder; 3-cutting the crusher; 4-a screw press; 5-filtrate outlet line; 6-residue outlet line; 7-squeezing liquid storage pool; 8-a submersible sewage pump; 9-a hydrolysis acidification tank; 10-liquid carbon source discharge line; 11-a conveyor belt; 12-full-automatic aerobic composting tank; 13-a blower; 14-a feed inlet; 15-a breather pipe; 16-bottom air inlet; 17-a material production port; 18-stirrer.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the invention, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides a resource treatment device for submerged plants, which comprises feeding equipment, a cutting crusher, a screw press, a pressing liquid storage tank, composting equipment, a submersible sewage pump and a hydrolysis acidification tank, wherein the submersible sewage pump is arranged in the feeding equipment;
the feeding equipment, the cutting crusher and the screw press are connected in sequence;
the screw press is provided with a filtrate outlet pipeline and a filter residue outlet pipeline;
the filtrate outlet pipeline is connected with the squeezed liquid storage pool;
the filter residue outlet pipeline is connected with the composting equipment;
the submersible sewage pump is arranged in the squeezing liquid storage tank and used for sending the filtrate flowing into the squeezing liquid storage tank from the screw press into the hydrolysis acidification tank.
According to the invention, preferably, the feeding device comprises a feeding bin and a feeder; the feeding bin, the feeder and the cutting crusher are connected in sequence.
According to the invention, preferably, the feeder is a belt feeder.
According to the present invention, preferably, the hydrolysis acidification tank is provided with a liquid carbon source discharge line.
According to the invention, preferably, the composting device comprises a conveyor belt, a fully automatic aerobic composting tank and a blower; the full-automatic aerobic composting tank comprises a feeding hole, a vent pipe, a bottom air inlet, a production hole, an online dissolved oxygen monitoring probe and a stirrer;
the filter residue outlet pipeline is connected with the feed inlet of the full-automatic aerobic composting tank through the conveyor belt; the blower is connected with an air inlet at the bottom of the full-automatic aerobic composting tank;
the vent pipe is arranged on the upper part of the wall of the full-automatic aerobic composting tank; the material production port is arranged at the lower part of the wall of the full-automatic aerobic composting tank; the agitator set up in inside the full-automatic good oxygen compost jar, the puddler of agitator connect in the top in the full-automatic good oxygen compost jar.
The online dissolved oxygen monitoring probe is used for detecting the DO concentration in the full-automatic aerobic composting tank;
according to the invention, the volume of the fully automatic aerobic composting tank is preferably 4-8m3。
The invention provides a resource treatment method for submerged plants, which adopts the resource treatment device for the submerged plants, and comprises the following steps:
s1: crushing and dehydrating the submerged plant to obtain filtrate and filter residue;
s2: composting the filter residue to prepare organic nutrient soil;
s3: directly taking the filtrate as a liquid fertilizer or a liquid carbon source; optionally, before the filtrate is used as a liquid carbon source, the filtrate is subjected to hydrolytic acidification treatment.
In the invention, the filtrate has high content of carbon, nitrogen and phosphorus, and the disposal mode can be actually divided into three types: 1. if the carbon content of the submerged plant is higher, the submerged plant can be used as a liquid carbon source; 2. if the carbon content of the submerged plant is high, but the biochemical components of the submerged plant are low (the COD in the filtrate is within the range of 10-30, and the BOD is within the range of 20-60%), the submerged plant can be hydrolyzed and acidified to convert the difficultly degraded macromolecular substances into easily degraded micromolecular substances and then be used as a liquid carbon source of the subsurface flow wetland; 3. if the nitrogen and phosphorus content of the submerged plant is higher, the submerged plant can be directly used as a liquid fertilizer.
According to the present invention, it is preferred that the water cut of the submerged plant is related to the dead time after fishing, typically 80-95%.
According to the present invention, preferably, the submerged plant is at least one of eel grass, malayan eyeweed, asparagus, curly pondweed, hornwort, watercress foxtail and perforatic tard. In the present invention, the texture of the above submerged plants is judged by visual inspection, touch, grinding and the like. It is found that the bitter herbs, the potamogeton malabaricum, the potamogeton tarragon and the potamogeton crispus have relatively similar texture and relatively high fiber content, and are difficult to grind by a mortar, while the goldfish algae, the argus spicata and the potamogeton crispus have relatively soft texture and low fiber content. In terms of composting, the first 3 submerged plants are beneficial to ventilation and feeding of the compost, and the last 3 submerged plants are more easily rotten.
In the invention, the optimum initial water content for composting treatment is 60-70%. Crushing dehydration is one of the modes of pretreatment of solid wastes, the size and the shape of the solid can be controlled through crushing, the water content of the solid can be reduced through dehydration, and the method is more favorable for recycling and reducing the solid wastes.
In the invention, in the high-temperature aerobic composting process, the optimum variation range of the organic matter content is 20-80%, and the organic matter content is not suitable when the organic matter content is too large or too small. When the organic matter content is less than 20%, enough heat cannot be generated to maintain the temperature required in the composting process, and harmless treatment is affected. Meanwhile, the organic matter content is too low, so that the growth and the propagation of composting microorganisms are limited, and the failure of the composting process is finally caused. When the organic matter content is more than 80 percent, the requirement on ventilation volume is high, so that the complete aerobic treatment is not achieved to generate stink, and the aerobic composting process cannot be smoothly carried out. The previous practice proves that in the composting process, a proper amount of inorganic matters and the like are needed to increase the porosity of the compost and provide an environment for ventilation and nutrient supply. According to the invention, preferably, the water content of the filter residue is 60-70%, the organic matter content is 40-60% (slightly lower than that before the pressing dehydration treatment), and the total nutrient content is more than 5%, so that the compost treatment requirement is met.
According to the invention, the composting step may preferably be a composting step of a corresponding volume of filter residue using a composting bag, as shown in fig. 1.
According to the invention, the period of the composting is preferably 7-10d, suitably adjusted according to the common general knowledge in the field during winter.
According to the invention, preferably, DO in the full-automatic aerobic composting tank is more than or equal to 2mg/L, and the blower is started to aerate when the dissolved oxygen is insufficient, so that the aerobic state in the full-automatic aerobic composting tank is ensured.
According to the present invention, preferably, the filtrate has a COD: TN ranges from 10 to 30, BOD: when the COD range is 20-60%, before the filtrate is used as a liquid carbon source, carrying out hydrolytic acidification treatment on the filtrate to change macromolecules into small molecules, and then using the small molecules as the liquid carbon source.
In the invention, the step of hydrolytic acidification treatment can be carried out according to technical specification of hydrolytic acidification reactor sewage treatment engineering HJ 2047-2015.
The invention is further illustrated by the following examples.
Example 1
The embodiment provides a resource treatment device for submerged plants, as shown in fig. 2, the device comprises a feeding device, a cutting crusher 3, a screw press 4, a pressing liquid storage tank 7, a composting device, a submersible sewage pump 8 and a hydrolysis acidification tank 9;
the feeding equipment comprises a feeding bin 1 and a feeder 2; the feeder 2 is a belt feeder;
the feeding bin 1, the feeding machine 2, the cutting crusher 3 and the screw press 4 are connected in sequence;
the screw press 4 is provided with a filtrate outlet line 5 and a residue outlet line 6;
the filtrate outlet pipeline 5 is connected with the squeezed liquid storage tank 7; the submersible sewage pump 8 is arranged in the pressing liquid storage tank 7 and is used for sending the filtrate which flows into the pressing liquid storage tank 7 from the screw press 4 into the hydrolysis acidification tank 9. The hydrolysis acidification tank 9 is provided with a liquid carbon source discharge pipeline 10.
The composting device comprises a conveyor belt 11, a full-automatic aerobic composting tank 12 and a blower 13; the full-automatic aerobic composting tank 12 comprises a feeding hole 14, a vent pipe 15, a bottom air inlet 16, a material producing hole 17, an online dissolved oxygen monitoring probe (not shown) and a stirrer 18;
the filter residue outlet pipeline 6 is connected with a feed inlet 14 of the full-automatic aerobic composting tank 12 through the conveyor belt 11; the blower 13 is connected with a bottom air inlet 16 of the full-automatic aerobic composting tank 12;
the vent pipe 15 is arranged on the upper part of the wall of the full-automatic aerobic composting tank 12; the material production port 17 is arranged at the lower part of the wall of the full-automatic aerobic composting tank 12; the stirrer 18 is arranged inside the full-automatic aerobic composting tank;
the online dissolved oxygen monitoring probe (not shown) is used for detecting the DO concentration in the fully-automatic aerobic composting tank 12;
the volume of the full-automatic aerobic composting tank 12 is 6m3。
The method for recycling submerged plants by using the device for recycling submerged plants according to the embodiment has a process flow as shown in fig. 2, wherein the water content of the submerged plants is 80-95%, and the submerged plants are at least one of sowthistle tasselflower, malus malabarica, potamogeton crispus, goldfish algae, argus spicata and potamogeton pectinatus.
The method comprises the following steps:
s1: crushing and dehydrating the submerged plant by using the device to obtain filtrate and filter residue;
s2: the water content of the filter residue is 70%, the organic matter content is 40-60%, the total nutrient content is more than 5%, and composting treatment is carried out on the filter residue with the corresponding volume by utilizing composting equipment to prepare organic nutrient soil which is used for fertilizing forest trees; the period of the composting treatment is 7-10 days. DO in the full-automatic aerobic composting tank 12 is more than or equal to 2mg/L, and the blower 13 is started to aerate when the dissolved oxygen is insufficient, so that the aerobic state in the full-automatic aerobic composting tank 12 is guaranteed.
S3: COD of the filtrate: TN ranges from 10 to 30, BOD: the COD range is 20-60%, the filtrate is subjected to hydrolytic acidification treatment, and macromolecular substances which are difficult to degrade are converted into micromolecular substances which are easy to degrade, and then the micromolecular substances are used as a liquid carbon source of the subsurface flow wetland; the step of hydrolytic acidification treatment can be carried out according to technical specification of hydrolytic acidification reactor sewage treatment engineering HJ 2047-2015.
The use effect of the organic nutrient soil prepared by the method of the embodiment was tested according to the plant detection method in the soil agrochemical analysis, and the organic nutrient soil of the embodiment was applied to the lawn at a use amount of 50g/m2After 1 month of use, empty is comparedThe indexes of the grass after using the organic nutrient soil of the embodiment are shown in table 1.
The application effect of the liquid carbon source prepared by the method in the embodiment in the subsurface wetland replenished with reclaimed water is detected according to the water quality monitoring method in the fourth edition of the Water and wastewater monitoring method, and the detection result is shown in table 2. Blank set was no liquid carbon source applied.
Therefore, the organic nutrient soil and the liquid carbon source prepared by the method have good use effect and meet practical requirements.
TABLE 1
Figure BDA0003405158930000081
TABLE 2
Figure BDA0003405158930000082
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. The submerged plant resource treatment device is characterized by comprising feeding equipment, a cutting crusher, a screw press, a pressing liquid storage tank and composting equipment, and optionally further comprising a submersible sewage pump and a hydrolysis acidification tank;
the feeding equipment, the cutting crusher and the screw press are connected in sequence;
the screw press is provided with a filtrate outlet pipeline and a filter residue outlet pipeline;
the filtrate outlet pipeline is connected with the squeezed liquid storage pool;
the filter residue outlet pipeline is connected with the composting equipment;
the submersible sewage pump is arranged in the squeezing liquid storage tank and used for sending the filtrate flowing into the squeezing liquid storage tank from the screw press into the hydrolysis acidification tank.
2. The resource treatment device for the submerged plant according to claim 1, wherein the feeding equipment comprises a feeding bin and a feeder; the feeding bin, the feeder and the cutting crusher are connected in sequence.
3. The resource treatment device for the submerged plant according to claim 2, wherein the feeder is a belt feeder.
4. The submerged plant resource treatment device according to claim 1, wherein the hydrolysis acidification tank is provided with a liquid carbon source discharge pipeline.
5. The submerged plant resource treatment device according to claim 1, wherein the composting apparatus comprises a conveyor belt, a fully automatic aerobic composting tank and an air blower; the full-automatic aerobic composting tank comprises a feeding hole, a vent pipe, a bottom air inlet, a production hole, an online dissolved oxygen monitoring probe and a stirrer;
the filter residue outlet pipeline is connected with the feed inlet of the full-automatic aerobic composting tank through the conveyor belt; the blower is connected with an air inlet at the bottom of the full-automatic aerobic composting tank;
the vent pipe is arranged on the upper part of the wall of the full-automatic aerobic composting tank; the material production port is arranged at the lower part of the wall of the full-automatic aerobic composting tank; the stirrer is arranged inside the full-automatic aerobic composting tank;
and the online dissolved oxygen monitoring probe is used for detecting the DO concentration in the full-automatic aerobic composting tank.
6. A submerged plant resource treatment apparatus as claimed in claim 5, wherein the volume of said fully automatic aerobic composting tank is 4-8m3。
7. A method for treating a submerged plant as a resource, characterized in that the method comprises the steps of:
s1: crushing and dehydrating the submerged plant to obtain filtrate and filter residue;
s2: composting the filter residue to prepare organic nutrient soil;
s3: directly taking the filtrate as a liquid fertilizer or a liquid carbon source; optionally, before the filtrate is used as a liquid carbon source, the filtrate is subjected to hydrolytic acidification treatment.
8. The method for recycling a submerged plant according to claim 1, wherein the water content of the submerged plant is 80-95%;
preferably, the submerged plant is at least one of eel grass, malayan eyeweed, asparagus cochinchinensis, curly pondweed, goldfish algae, argyrophyllum spicatum and perforatic tarragon.
9. The method for recycling a submerged plant according to claim 1, wherein,
the water content of the filter residue is 60-70%, the organic matter content is 40-60%, and the total nutrient content is more than 5%;
the period of the composting treatment is 7-10 d;
DO in the full-automatic aerobic composting tank is more than or equal to 2mg/L, and the blower is started to aerate when the dissolved oxygen is insufficient, so that the aerobic state in the full-automatic aerobic composting tank is guaranteed.
10. The method for recycling submerged plants according to claim 1, wherein the filtrate contains COD: TN ranges from 10 to 30, BOD: and when the COD range is 20-60%, carrying out hydrolytic acidification treatment on the filtrate before the filtrate is used as a liquid carbon source.
CN202111510545.3A 2021-12-10 2021-12-10 Submerged plant recycling treatment method and device Pending CN114213162A (en)

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李章海等: "《有机肥条垛型堆积发酵技术与应用 第1版》", 30 June 2015, 中国科学技术大学出版社 *

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