CN113845225A - System for separating domestic sewage source of villages and towns and recycling waste based on worms - Google Patents

System for separating domestic sewage source of villages and towns and recycling waste based on worms Download PDF

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Publication number
CN113845225A
CN113845225A CN202111286365.1A CN202111286365A CN113845225A CN 113845225 A CN113845225 A CN 113845225A CN 202111286365 A CN202111286365 A CN 202111286365A CN 113845225 A CN113845225 A CN 113845225A
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China
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worm
septic tank
communicated
water
artificial wetland
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CN202111286365.1A
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Chinese (zh)
Inventor
丁杰
杨珊珊
姜珺秋
王堤
彭云清
徐伟
袁芳
钟乐
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China Environmental Protection Water Investment Co ltd
Harbin Institute of Technology
CECEP Engineering Technology Research Institute Co Ltd
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China Environmental Protection Water Investment Co ltd
Harbin Institute of Technology
CECEP Engineering Technology Research Institute Co Ltd
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Priority to CN202111286365.1A priority Critical patent/CN113845225A/en
Publication of CN113845225A publication Critical patent/CN113845225A/en
Pending legal-status Critical Current

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    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/16—Treatment of sludge; Devices therefor by de-watering, drying or thickening using drying or composting beds
    • 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
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/105—Characterized by the chemical composition
    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • 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
    • C05F17/05—Treatments involving invertebrates, e.g. worms, flies or maggots
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F3/00—Fertilisers from human or animal excrements, e.g. manure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/005—Black water originating from toilets
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • 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
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage
    • 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)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Biotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Insects & Arthropods (AREA)
  • Tropical Medicine & Parasitology (AREA)
  • Biochemistry (AREA)
  • Botany (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses a system for separating domestic sewage sources and recycling wastes of villages and towns based on worms, which comprises a biomass solid waste collecting device, a worm septic tank, a worm biological filter and an artificial wetland, wherein the worm biological filter is arranged in the worm septic tank; the biomass solid waste collection device is communicated with the top of the worm septic tank; the worm septic tank is communicated with the household black water through a black water collecting pipeline; the worm septic tank realizes the co-composting effect of worms on the biomass solid waste and the household black water; the worm biofilter is communicated with the water outlet at the bottom of the household grey water and worm septic tank through a three-way valve arranged on a grey water collecting pipeline, so that the organic matters are efficiently removed; the bottom of the worm biofilter is communicated with the artificial wetland through a ditch; the further denitrification and dephosphorization of the artificial wetland reaches the recycling standard. The invention adopts the combined process to realize the in-situ resource ecological treatment and recycling of the domestic waste of the villages and the towns, relieves the problems of organic fertilizer shortage and water resource shortage in the villages and the towns and realizes the recycling of waste resources.

Description

System for separating domestic sewage source of villages and towns and recycling waste based on worms
Technical Field
The invention relates to the technical field of waste treatment, in particular to a system for separating domestic sewage sources of villages and towns and recycling waste based on worms.
Background
At present, waste water and solid waste in villages and small towns are not effectively treated, and waste treatment is one of the problems which are urgently needed to be solved in villages and small towns ecological environment construction. The wastes in villages and small towns mainly comprise solid wastes and domestic sewage, and the domestic sewage consists of black water and grey water. The black water comprises excrement and urine, which only accounts for 1% -2% of the total amount of the domestic sewage, but is a main pollutant of the domestic sewage, wherein carbon, nitrogen, phosphorus and potassium account for more than 60% of the total amount. The ash water generated by daily washing, washing and kitchen water accounts for 50-80% of the total amount of rural domestic sewage, mainly contains organic and inorganic pollutants, and has low pollution degree. In addition, nutrient substance shortage in villages and towns is an important factor influencing sustainable agricultural production, excrement and urine are traditional organic fertilizers in rural areas of Asia, including China, Korea, Vietnam and the like, contain various nutrient substances such as nitrogen, phosphorus, potassium and the like required by plants, and water resource shortage is one of the problems in wide areas. Therefore, it is necessary to effectively separate and recycle domestic waste in villages and small towns, so that not only can the ecological environment of the villages and small towns be improved, but also nutrient substances and water resources required by plant growth can be fully and nearby utilized.
Disclosure of Invention
The invention aims to provide a worm-based system for separating domestic sewage sources and recycling wastes in villages and towns, which solves the problems in the prior art, can realize ecological treatment on the wastes in the villages and the towns, can relieve the problems of organic fertilizer shortage and water resource shortage in the villages and the towns to a certain extent, and realizes recycling of the waste resources in local regions.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a system for separating domestic sewage sources and recycling wastes in villages and towns based on worms, which comprises: a biomass solid waste collection device, a worm septic tank, a worm biofilter and an artificial wetland; the biomass solid waste collection device is communicated with the top of the worm septic tank; the bottom of the worm biofilter is communicated with the artificial wetland through a ditch;
the worm septic tank is communicated with household black water through a black water collecting pipeline; the worm biofilter is communicated with the household grey water through a grey water collecting pipeline;
a three-way valve is arranged on the grey water collecting pipeline; the grey water collecting pipeline is communicated with a water outlet at the bottom of the worm septic tank through the three-way valve.
The worm septic tank is of a round tank structure or a rectangular tank structure; a cover plate covers the top of the worm septic tank, and a feed inlet is formed in the middle of the cover plate; the biomass solid waste collection device is communicated with the interior of the worm septic tank through the feed inlet; the cover plate is also provided with a ventilation opening and is communicated with the ventilation pipeline through the ventilation opening;
a worm bed is arranged in the worm septic tank; auxiliary materials are laid on the worm bed;
the top of the wall of the worm septic tank is also provided with a water inlet, one end of the black water collecting pipeline is arranged at the water inlet, and the other end of the black water collecting pipeline is communicated with the bottom of the household black water toilet.
The worm septic tank part is embedded underground; the wall of the worm septic tank is also provided with a discharge hole; the horizontal height of the discharge hole is flush with the ground; the discharge port is arranged above the worm bed.
The auxiliary materials comprise soil, straws, sawdust and gravels.
The worm biofilter is cylindrical, and water flows vertically downwards;
the worm biofilter is of a three-layer structure, and is sequentially provided with a gravel layer, a worm bed layer and a uniform water distribution layer from the bottom to the top;
the top of the worm biofilter is communicated with one end of the three-way valve; the other end of the three-way valve is communicated with the family grey water bathroom, the washing machine, the washing room and the kitchen through the grey water collecting pipeline.
And a crushing mechanism is arranged in the biomass solid waste collecting device.
The artificial wetland is of a rectangular structure, and the artificial wetland is an undercurrent artificial wetland.
Wetland plants are planted in the artificial wetland; the wetland plants are aquatic emergent aquatic plants.
The invention discloses the following technical effects:
(1) the method separates the solid wastes in villages and towns from the domestic sewage in situ, reduces the cost of waste transportation and is convenient for on-site treatment;
(2) the worm septic tank can simultaneously treat black water and biomass solid waste, and the co-composting treatment product can be used as an agricultural organic fertilizer in villages and small towns nearby, so that the cyclic utilization of substances is realized;
(3) the worm biological filter can efficiently remove the domestic grey water of villages and towns and the effluent of the worm septic tank, and worms can be recovered as the feed of poultry, thus having both ecological benefit and economic benefit;
(4) the worm-based system for separating the domestic sewage source of the villages and the towns and recycling the wastes is simple to operate, does not need special nursing, is convenient to manage, and can feed and take the materials regularly;
(5) the system disclosed by the invention is based on the concept of resource recovery, and can realize sustainable development of regional resources, agriculture and ecological environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of the overall structure of the present invention;
the device comprises a solid waste collecting device 1, a pulverizer 2, a household toilet 3, a bathroom 4, a washing machine 5, a washing room 6, a household kitchen 7, a black water collecting pipeline 8, an ash water collecting pipeline 9, a three-way pipe 10, a ventilation pipeline 11, a worm septic tank 12, a discharge port 13, a water outlet 14, a feed port 15, a worm bed 16, a water inlet 17, auxiliary materials 18, a water distribution layer 19, a worm bed layer 20, a gravel layer 21, a worm biofilter 22, a ditch 23, wetland plants 24 and an artificial wetland 25.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a system for separating domestic sewage sources and recycling wastes in villages and towns based on worms, which comprises: the biomass solid waste collecting device 1, the worm septic tank 12, the worm biofilter 22 and the artificial wetland 25; the biomass solid waste collection device 1 is communicated with the top of the worm septic tank 12; the bottom of the worm biofilter 22 is communicated with the artificial wetland 25 through a ditch 23;
the worm septic tank 12 is communicated with the household black water through a black water collecting pipeline 8; the worm biological filter 22 is communicated with the household grey water through a grey water collecting pipeline 9;
a three-way valve 10 is arranged on the ash water collecting pipeline 9; the ash water collecting pipeline 9 is communicated with a water outlet 14 at the bottom of the worm septic tank 12 through a three-way valve 10;
the worm biological filter 22 is of a three-layer structure and sequentially comprises a gravel layer 21, a worm bed layer 20 and an even water distribution layer 19 from bottom to top.
The worm septic tank 12 is in a round tank structure or a rectangular tank structure; a cover plate covers the top of the worm septic tank 12, and a feed inlet 15 is formed in the middle of the cover plate; the biomass solid waste collection device 1 is communicated with the interior of the worm septic tank 12 through a feed inlet 15; the cover plate is also provided with a ventilation opening and is communicated with the ventilation pipeline 11 through the ventilation opening;
a worm bed 16 is arranged in the worm septic tank 12; auxiliary materials 18 are laid on the worm bed 16;
the top of the wall of the worm septic tank 12 is also provided with a water inlet 17, one end of a black water collecting pipeline 8 is arranged at the water inlet 17, and the other end of the black water collecting pipeline 8 is communicated with the bottom of the household black water toilet 3.
The worm septic tank 12 is partially embedded underground; the wall of the worm septic tank 12 is also provided with a discharge hole 13; the horizontal height of the discharge port 13 is flush with the ground; the outlet 13 opens above the worm bed 16.
The adjuvants 18 include soil, straw, wood chips, gravel, and wetland plants.
The worm biological filter 22 is a circular or rectangular vertical flow structure; the top of the worm biological filter 22 is communicated with one end of the three-way valve 10; the other end of the three-way valve 10 is connected to the domestic greywater shower 4, washing machine 5, washing room 6 and kitchen 7 via a greywater collecting line.
The biomass solid waste collection device 1 is internally provided with a crushing mechanism 2.
The artificial wetland 25 is a rectangular structure, and the artificial wetland 25 is an undercurrent artificial wetland.
Wetland plants 24 are planted in the artificial wetland 25; the wetland plants 24 are aquatic emergent aquatic plants.
In one embodiment of the invention, the multi-stage baffling artificial wetland can further purify water quality, thereby achieving the purpose of sewage reuse or agricultural irrigation.
In one embodiment of the invention, as shown in fig. 1, waste-resource-agricultural recycling in villages and towns is realized in order to treat and recycle waste available in villages and towns in situ. Provides an in-situ source separation and resource utilization system of a worm septic tank, a worm biofilter and an artificial wetland. Firstly, pollutants are separated from a source, and the worm septic tank 12 is mainly used for treating black water and biomass solids (comprising kitchen waste, agricultural wastes, wetland plants and the like) generated in a household toilet; the worm biological filter 22 is used for treating mixed sewage collected by the water outlet 14 of the worm septic tank and the grey water collecting pipeline 9; the artificial wetland 25 is used for deeply purifying the effluent of the worm biofilter 22.
The solid waste collecting device 1 is used for collecting biomass solids and crushing the biomass solids by the crushing mechanism 2; the black water collecting pipeline 8 collects the waste water of the toilet 3; the grey water collecting pipeline 9 collects the waste water of the bathroom 4, the washing machine 5, the washing room 6 and the kitchen 7, and the waste water at the water outlet 14 of the worm septic tank and the grey water collected by the grey water collecting pipeline 9 are connected to enter the worm biofilter 22 through the three-way valve 10.
The worm septic tank 12 adopts a round or rectangular tank bottom and is made of polyethylene plastics; one end of the black water collecting pipeline 8 is connected with the toilet, the black water collecting pipeline 8 is lower than the toilet 3, the bottom of the worm septic tank 12 is provided with a water outlet 14, the middle part of the worm septic tank is provided with a material taking port 13, the material taking port 13 is parallel to the ground, the size of the material taking port is 0.5m by 0.5m, and the upper part of the material taking port is provided with a water inlet 17; the bottom effluent of the worm biofilter 22 enters the artificial wetland 25 through the ditch 23 for further purification.
More specifically, taking a family (3 people) as an example, the specific operation includes the following steps:
(1) the waste water of the household toilet 3 is collected by using a black water collecting pipeline 8, the household living grey water is collected 9 by using a grey water collecting pipeline, and 90 +/-20L of black water and 240 +/-25L of grey water are generated averagely every day. The average COD concentration of the black water is 1200 +/-150 mg/L, the average TN concentration is 120 +/-50 mg/L, and the average TP concentration is 20 +/-10 mg/L. The average concentration of COD in the grey water is 800 +/-100 mg/L, the average concentration of TN is 10 +/-8 mg/L, and the average concentration of TP is 4 +/-3 mg/L.
(2) The wastewater of the household toilet 3 collected in the step (1) enters a worm septic tank 12 through a black water collecting pipeline 8 for worm composting treatment, the household grey water collected in the step (1) enters a worm biological filter 22 through a grey water collecting pipeline 9 for treatment, and the worm biological filter 22 mainly removes suspended substances and organic matters in the wastewater.
And (2) adding rice straw powder into the worm septic tank 12 once every 10 days, wherein 1kg of rice straw powder is added every time, and the grain diameter of the straw powder is 1-3mm, so that the worm composting of black water is facilitated.
And (3) the effluent of the worm septic tank 12 in the step (2) enters a worm biological filter tank for further treatment, most of solids are intercepted by the worm septic tank 12, and the solid interception rate can reach more than 90%.
The density of worms added into the worm septic tank 12 in the step (2) is 3kg worms/m2。
The worm biofilter 22 in the step (2) consists of three layers of filter materials, namely a gravel layer 21, a worm bed layer 20 and a uniform water replenishing layer 19 from the bottom to the top in sequence; the gravel layer 19 is composed of cobbles or gravel, the grain diameter is 3-8cm, the thickness is 50cm, and the gravel layer with larger grain diameter is arranged at the bottommost part; the worm bed layer 20 is formed by mixing wood chips and ceramsite, and the thickness of the worm bed layer is 30 cm; the uniform water-replenishing layer 19 is plastic elastic filler, has the thickness of 5-10cm, has good water permeability and plays the roles of uniformly distributing water and shading light.
The worm biofilter 22 in the step (2) can further retain solid matters and most organic pollutants, worms in the worm bed 20 can prey on the solid matters, bacterial microorganisms and the like, the worms can increase the dissolved oxygen content of the system, the diversity of the microorganisms of the system is improved, and the worm and the microorganisms interact to facilitate the removal of the pollutants.
The density of worms added into the worm biofilter 22 in the step (2) is 0.5kg of worms/m2。
The worm biofilter 22 in the step (2) has good removal effect on suspended substances and COD in the family grey water and the effluent of the worm septic tank 12, the removal rate of TSS is more than 95%, the removal rate of COD is about 80%, and the removal rates of TN and TP are about 50% and 60%.
(3) The effluent of the worm biofilter 22 is further purified by the artificial wetland to achieve the purpose of nitrogen and phosphorus removal, the removal rate of COD by the artificial wetland is more than 90 percent, the removal rate of TN is about 90 percent, and the removal rate of TP is about 95 percent.
And (3) the effluent of the constructed wetland in the step (3) meets the Water quality Standard for Farmland irrigation of the people's republic of China (GB 5084-2021).
In an embodiment of the present invention, the artificial wetland 25 is a rectangular structure, and is a multi-stage baffled artificial wetland, the artificial wetland 25 is planted with aquatic plants 24, and the aquatic plants 24 include aquatic emergent aquatic plants such as reed and calamus.
Furthermore, the multi-stage baffling artificial wetland can form an aerobic and anoxic environment in the system, which is beneficial to removing pollutants. The multi-stage baffling is mainly arranged for guaranteeing the effluent quality, and because the difference of pollutants in the domestic sewage of villages and towns is large, continuous effluent is not realized, and the space-time difference is large.
In one embodiment of the invention, the worm bed 16 is positioned about 10cm above the bottom water outlet 14 of the worm septic tank 12.
In one embodiment of the present invention, the worm biofilter 22 is based on a biofilter with worms added to affect contaminant removal by ingestion, grinding, digestion, excretion, etc. first, the worms may prey on the solid waste organic matter, while the worms may interact with microorganisms to accelerate contaminant removal. In addition, worms may also prey on pathogenic microorganisms. The worm biofilter 22 is cylindrical and is filled with a filler, and the particle size of the filler is reduced from low to high in order to prevent clogging. The vermicular biofilter is characterized in that the packing comprises three layers, wherein the bottom of the packing is a gravel layer 21 with relatively large particle size, the middle of the packing is a vermicular layer 20 which mainly provides a place for vermicular life, and the upper part of the packing is an even water distribution layer 19 which aims at enabling water flow to flow downwards from the top evenly and avoiding the water flow from directly scouring the vermicular.
Based on the characteristics of urban areas in China, domestic waste is separated from the source, and biomass solids, black water and grey water in rural waste are collected and treated independently. The worm septic tank effectively treats the black water by utilizing the predation effect of worms, and in addition, biomass solid wastes (plant wastes, kitchen wastes and the like) in villages and small towns can also be added into the worm septic tank for common treatment, so that organic fertilizers beneficial to plant growth are finally generated and returned to farmlands nearby. The leachate of the worm septic tank and the grey water adopt a worm biological filter to treat main organic substances, and the effluent is further denitrified and dephosphorized by the artificial wetland to reach the sewage agricultural irrigation standard or the reclaimed water reuse standard to be used as toilet flushing water. Plant wastes collected by the artificial wetland can also be added into the worm septic tank for common treatment, so that the cyclic utilization of resources is realized.
Furthermore, the invention focuses on recycling resources, and provides a new processing mode on the basis of the traditional ecological sanitary facility; the system is used as an ecological treatment technology, and the treatment effect is influenced by the low temperature in winter in northern areas of China, so the system is more similar to the treatment effect in southern areas of China, but the system can be used in the northern areas as long as appropriate heat preservation measures are provided, so the system is not limited to areas and can not only be applied to China. Wide application range, convenient popularization and strong adaptability.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims (8)

1. Villages and small towns domestic sewage source separation and waste recycling system based on worm, its characterized in that includes: the device comprises a biomass solid waste collection device (1), a worm septic tank (12), a worm biofilter (22) and an artificial wetland (25); the biomass solid waste collection device (1) is communicated with the top of the worm septic tank (12); the bottom of the worm biofilter (22) is communicated with the artificial wetland (25) through a ditch (23);
the worm septic tank (12) is communicated with household black water through a black water collecting pipeline (8); the worm biofilter (22) is communicated with the household grey water through a grey water collecting pipeline (9);
a three-way valve (10) is arranged on the grey water collecting pipeline (9); the grey water collecting pipeline (9) is communicated with a water outlet (14) at the bottom of the worm septic tank (12) through the three-way valve (10).
2. The system of claim 1, wherein the system comprises: the worm septic tank (12) is of a round tank structure or a rectangular tank structure; a cover plate covers the top of the worm septic tank (12), and a feed inlet (15) is formed in the middle of the cover plate; the biomass solid waste collection device (1) is communicated with the interior of the worm septic tank (12) through the feed inlet (15); the cover plate is also provided with a ventilation opening and is communicated with the ventilation pipeline (11) through the ventilation opening;
a worm bed (16) is arranged in the worm septic tank (12); auxiliary materials (18) are laid on the worm bed (16);
the top of the wall of the worm septic tank (12) is also provided with a water inlet (17), one end of the black water collecting pipeline (8) is arranged at the water inlet (17), and the other end of the black water collecting pipeline (8) is communicated with the bottom of the household black water toilet (3).
3. The system of claim 2, wherein the system comprises: the worm septic tank (12) is partially embedded underground; the tank wall of the worm septic tank (12) is also provided with a discharge hole (13); the horizontal height of the discharge hole (13) is flush with the ground; the discharge port (13) is arranged above the worm bed (16).
4. The system of claim 2, wherein the system comprises: the auxiliary materials (18) comprise soil, straws, sawdust and gravels.
5. The system of claim 1, wherein the system comprises: the worm biological filter (22) is cylindrical, and water flows vertically downwards;
the worm biofilter (22) is of a three-layer structure, and is sequentially provided with a gravel layer (21), a worm bed layer (20) and a uniform water distribution layer (19) from the bottom to the top;
the top of the worm biofilter (22) is communicated with one end of the three-way valve (10); the other end of the three-way valve (10) is communicated with the family grey water bathroom (4), the washing machine (5), the washing room (6) and the kitchen (7) through the grey water collecting pipeline.
6. The system of claim 1, wherein the system comprises: a crushing mechanism (2) is installed in the biomass solid waste collection device (1).
7. The system of claim 1, wherein the system comprises: the artificial wetland (25) is of a rectangular structure, and the artificial wetland (25) is an undercurrent artificial wetland.
8. The system of claim 7, wherein the system comprises: wetland plants (24) are planted in the artificial wetland (25); the wetland plants (24) are aquatic emergent aquatic plants.
CN202111286365.1A 2021-11-02 2021-11-02 System for separating domestic sewage source of villages and towns and recycling waste based on worms Pending CN113845225A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104860491A (en) * 2015-06-12 2015-08-26 安徽汇泽通环境技术有限公司 Comprehensive rural living sewage source separation, treatment and use system
CN112125472A (en) * 2020-09-18 2020-12-25 中国科学院城市环境研究所 Distributed domestic sewage source separation, collection and treatment system for resource on-site recycling and pollution load reduction and design method thereof
CN112778032A (en) * 2021-01-22 2021-05-11 哈尔滨工业大学 Worm bed septic tank
AU2021105783A4 (en) * 2021-08-18 2021-10-21 General Water of China Corporation Limited Worm based system for onsite domestic sewage source separation treatment and waste resource recycling in villages and towns

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104860491A (en) * 2015-06-12 2015-08-26 安徽汇泽通环境技术有限公司 Comprehensive rural living sewage source separation, treatment and use system
CN112125472A (en) * 2020-09-18 2020-12-25 中国科学院城市环境研究所 Distributed domestic sewage source separation, collection and treatment system for resource on-site recycling and pollution load reduction and design method thereof
CN112778032A (en) * 2021-01-22 2021-05-11 哈尔滨工业大学 Worm bed septic tank
AU2021105783A4 (en) * 2021-08-18 2021-10-21 General Water of China Corporation Limited Worm based system for onsite domestic sewage source separation treatment and waste resource recycling in villages and towns

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Application publication date: 20211228