Miniature wetland device for rural domestic sewage treatment

Abstract

The utility model discloses a miniature wetland device for rural domestic sewage treatment, which comprises a wetland groove, a water inlet pipe, a water outlet pipe, wetland vegetation and a filter layer, the water inlet pipe is arranged at the upper end of the wetland groove, the water outlet pipe is arranged at the bottom of the wetland groove, and the wetland vegetation and the filter layer are sequentially arranged in the wetland groove from top to bottom. The filtering layer internally comprises a hydrotalcite-like layer; the water inlet pipe is connected with a water inlet diversion pipe arranged at the upper part in the wetland tank, uniform water flowing holes are respectively formed in two sides of the water inlet diversion pipe, and long water flowing tanks and short water flowing tanks are respectively mounted on the water flowing holes at intervals. The miniature wetland device disclosed by the utility model can effectively solve the problem of rural decentralized sewage treatment, so that the purpose of deep phosphorus removal can be achieved while sewage is treated through the wetland vegetation and the filter layer, the water inlet pipe uniformly discharges the entering sewage to the wetland vegetation and the filter layer at the top in the wetland groove in a shunting manner, and the sewage treatment efficiency is improved. The entering sewage is prevented from washing and damaging vegetation and soil on the surface of the micro wetland.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment devices, in particular to a micro wetland device for rural domestic sewage treatment. Background Art

[0002] Rural domestic sewage includes toilet waste, kitchen waste, washing waste and bathing waste. Due to the popularity of flush toilets in rural areas, fecal waste has gradually become the main source of domestic sewage. In addition to containing high concentrations of organic matter, nitrogen and phosphorus, toilet waste may also contain pathogenic microorganisms and residual drugs. Among them, phosphorus-containing pollutants in rural domestic sewage will accelerate the deterioration of water quality after being discharged into water bodies, thereby damaging the quality of surface water and groundwater.

[0003] In my country, most rural domestic sewage treatment methods are aerobic biochemical or anaerobic-aerobic biochemical. However, for some areas with higher water quality discharge standards, conventional anaerobic-aerobic biochemical methods are difficult to achieve standard phosphorus removal. It is necessary to improve the anaerobic effect (maintain anaerobic temperature) and aeration effect, which will undoubtedly increase the treatment cost. In addition, the residual sludge output of phosphorus removal by anaerobic-aerobic biochemical method is high, and the later operation and maintenance burden is large, which is not conducive to the promotion and use in rural areas with weak economy. In addition, there is uneven distribution of rural domestic sewage in time and space, and it is difficult to collect sewage due to the scattered residence of farmers. It is difficult to collect and treat it in a unified manner. It is necessary to carry out decentralized rural domestic sewage treatment according to local conditions to reduce the cost of management.

[0004] Currently, existing sewage treatment wetlands only have water inlets, outlets, and various filter layers, but the inlet is limited to one position. Since the wetland is a whole device with a surface, if the water inlet is only at one point, each time the water source entering the wetland will flush the fixed position, causing the position where the water flows on the wetland surface to be quickly flushed and destroyed, and other positions on the surface will not play a good role. Utility Model Content

[0005] The utility model aims to solve the technical problems existing in the prior art and proposes a micro wetland device for rural domestic sewage treatment.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a micro wetland device for rural domestic sewage treatment, the structure of which is: including a wetland trough, an inlet pipe, an outlet pipe, wetland vegetation and a filter layer, the upper end of the wetland trough is provided with an inlet pipe, the bottom of the wetland trough is provided with an outlet pipe, the wetland trough is provided with wetland vegetation and a filter layer from top to bottom, and the filter layer includes a hydrotalcite-like layer; the inlet pipe is connected to the inlet diverter pipe provided at the upper part of the wetland trough, the two sides of the inlet diverter pipe are respectively provided with uniform water flow holes, and the water flow holes are respectively installed with long flow troughs and short flow troughs at intervals;

[0007] A wire filter is provided in the water outlet pipe, and a drain valve is provided on the water outlet pipe at the rear end of the wire filter;

[0008] The filter layer is provided with a soil layer, a ceramsite layer, a hydrotalcite-like layer and a pebble layer in order from top to bottom, and a partition is provided between the soil layer, the ceramsite layer, the hydrotalcite-like layer and the pebble layer respectively, and the partition is provided with a water-permeable hole; the partition is a porous partition;

[0009] The wetland vegetation is planted in the soil layer. The wetland vegetation planted in the soil layer is selected from plants that can assimilate and absorb pollutants such as phosphates in sewage through photosynthesis, such as calla lilies, reeds, cannas, cattails, windmill grass, etc. In addition, such plants can also increase the total amount of micro-wetland microorganisms, promote nitrification and denitrification in the wetland, so as to achieve the purpose of phosphorus removal.

[0010] The matrix particle sizes in the expanded clay layer, the hydrotalcite-like layer and the pebble layer are arranged in order from small to large to ensure smooth flow; in addition, the matrix particles in each layer have a large specific surface area, that is, they have more pore structures to ensure the load of microbial film on the surface of the particles; on the other hand, more pore structures can also increase the adsorption of phosphorus, and the hydrotalcite-like layer can more deeply adsorb phosphorus, thereby achieving the purpose of deep phosphorus removal.

[0011] The beneficial effects of the utility model are as follows: the micro-wetland device can effectively solve the problem of decentralized sewage treatment in rural areas, thereby achieving the purpose of deep phosphorus removal while treating sewage through wetland vegetation and filter layers. The water inlet pipe discharges the incoming sewage evenly to the wetland vegetation and filter layer at the top of the wetland trough through diversion, avoiding the incoming sewage from being washed in one place and damaging the vegetation and soil on the surface of the micro-wetland. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the device of the utility model;

[0013] Figure 2 This is a water inlet pipe layout diagram of the utility model;

[0014] In the figure: 1, water inlet pipe; 2, water outlet pipe; 3, wetland vegetation; 4, soil layer; 5, expanded clay layer, 6, hydrotalcite-like layer; 7, partition; 8, drain valve; 9, wire filter; 10, pebble layer; 11, wetland trough; 12, water inlet diversion pipe; 13, long-flow water trough, 14, short-flow water trough, 15, water flow hole. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1-2 As shown, the utility model provides a micro wetland device for rural domestic sewage treatment, comprising a wetland trough 11, an inlet pipe 1, an outlet pipe 2, wetland vegetation 3 and a filter layer, wherein the wetland trough 11 is provided with wetland vegetation 3 and a filter layer in sequence from top to bottom, and the filter layer is provided with a soil layer 4, a ceramsite layer 5, a hydrotalcite-like layer 6 and a pebble layer 10 in sequence from top to bottom, and a partition 7 is provided between the soil layer 4, the ceramsite layer 5, the hydrotalcite-like layer 6 and the pebble layer 10, respectively, and a water-permeable hole is provided on the partition 7; the partition 7 is a porous partition 7;

[0017] A water inlet pipe 1 is provided at the upper end of the wetland trough 11, and the water inlet pipe 1 is connected to a water inlet shunt pipe 12 provided at the upper part of the wetland trough 11. Uniform water flow holes 15 are provided on both sides of the water inlet shunt pipe 12, and long water flow grooves 13 and short water flow grooves 14 are installed at intervals on the water flow holes 15.

[0018] A water outlet pipe 2 is provided at the bottom of the wetland tank 11, a steel wire filter screen 9 is provided in the water outlet pipe 2, and a drain valve 8 is provided on the water outlet pipe 2 at the rear end of the steel wire filter screen 9;

[0019] The wetland vegetation 3 is planted in the soil layer 4. The wetland vegetation 3 planted in the soil layer 4 is selected from plants that can absorb pollutants such as phosphate in sewage through photosynthesis, such as calla lilies, reeds, cannas, cattails, windmill grass, etc. In addition, such plants can also increase the total amount of micro-wetland microorganisms, promote nitrification and denitrification in the wetland, so as to achieve the purpose of phosphorus removal;

[0020] The matrix particle sizes in the expanded clay layer 5, the hydrotalcite-like layer 6 and the pebble layer 10 are arranged in order from small to large to ensure smooth flow; in addition, the matrix particles in each layer have a large specific surface area, that is, they have more pore structures to ensure the load of microbial film on the surface of the particles; on the other hand, more pore structures can also increase the adsorption of phosphorus, and the hydrotalcite-like layer 6 can more deeply adsorb phosphorus, thereby achieving the purpose of deep phosphorus removal.

[0021] When in use, the water inlet pipe 1 of the device can be directly connected to the sewage drain pipe to carry out micro-wetland sewage treatment, and the treated wastewater can be discharged through the outlet pipe 2 for direct discharge; or the water inlet pipe 1 can be connected to the outlet end after anaerobic-aerobic biochemical treatment to carry out micro-wetland sewage treatment, and the treated wastewater can be discharged through the outlet pipe 2 for direct discharge.

Claims

1. A micro wetland device for rural domestic sewage treatment, characterized in that: It includes a wetland trough, an inlet pipe, an outlet pipe, wetland vegetation and a filter layer. The upper end of the wetland trough is provided with an inlet pipe, the bottom of the wetland trough is provided with an outlet pipe, wetland vegetation and a filter layer are arranged in sequence from top to bottom in the wetland trough, and the filter layer includes a hydrotalcite-like layer; the inlet pipe is connected to the inlet diverter pipe arranged at the upper part of the wetland trough, and both sides of the inlet diverter pipe are respectively provided with uniform water flow holes, and long flow troughs and short flow troughs are respectively installed on the water flow holes at intervals.

2. The micro wetland device for rural domestic sewage treatment according to claim 1 is characterized by: A wire filter is arranged in the water outlet pipe, and a drain valve is arranged on the water outlet pipe at the rear end of the wire filter.

3. The micro wetland device for rural domestic sewage treatment according to claim 1 is characterized in that: The filter layer is provided with a soil layer, a ceramsite layer, a hydrotalcite-like layer and a pebble layer in order from top to bottom, and partitions are respectively provided between the soil layer, the ceramsite layer, the hydrotalcite-like layer and the pebble layer, and the partitions are provided with water permeable holes.

4. The micro wetland device for rural domestic sewage treatment according to claim 3 is characterized by: The separator is a porous separator.

5. The micro wetland device for rural domestic sewage treatment according to claim 3 is characterized by: The matrix particle sizes in the ceramsite layer, the hydrotalcite-like layer and the pebble layer are arranged in order from small to large.

Images