CN206799250U - Opel oxidation ditch and the sewage disposal system of biological floating bed combination - Google Patents

Abstract

The utility model relates to a sewage treatment system based on the combination of Obel oxidation ditch and ecological floating bed. It includes the Aubert oxidation ditch and the ecological floating bed pond which are composed of three concentric circular channels with sewage inlet and outlet. The ecological floating beds in the floating bed pool are connected by connecting buckles, and at least two floating beds are connected in sequence. The ecological floating bed includes fillers, plants and planting frames. The pretreated sewage first flows through the Aubert oxidation ditch to remove some organic matter, nitrogen, phosphorus, etc., while increasing the dissolved oxygen in the water. The sewage treated by the oxidation ditch enters the ecological floating bed pool, and the pollutants are further removed under the joint action of large aquatic plants and microorganisms. The effective combination of oxidation ditch and ecological floating bed can reduce the occupied area while improving the removal efficiency of pollutants. The utility model is suitable for the treatment of urban domestic sewage.

Description

Sewage Treatment System Combining Aubert Oxidation Ditch and Ecological Floating Bed

technical field

The utility model belongs to the field of environmental protection and relates to a sewage treatment system, in particular to a sewage treatment system combined with an Aubert oxidation ditch and an ecological floating bed.

Background technique

In recent years, the eutrophication of water body has become increasingly serious, and the requirements for nitrogen and phosphorus content in effluent have been continuously increased. According to "Pollutant Discharge Standards for Urban Sewage Treatment Plants GB8978-2002", the level A standard for total nitrogen is 15 mg/l, the level B is 20 mg/l, the level A standard for total phosphorus is 0.5 mg/l, and the level B is 0.5 mg/l. 1mg/l. Water pollution is becoming more and more serious, and the treatment of polluted water is imminent.

In the prior art, the traditional oxidation ditch is commonly used, which is a kind of circulating flow aeration ditch connected end to end, also known as a circulating aeration tank. Oxidation ditch has the advantages of longer hydraulic retention time, lower organic load and longer sludge age. But it also has some disadvantages. When there are more carbohydrates in the wastewater, the N and P contents are unbalanced, the pH value is low, the sludge load in the oxidation ditch is too high, the dissolved oxygen is insufficient, and the sludge is not discharged smoothly, it is easy to cause filamentous bacteria. Sludge bulking; non-filamentous fungal sludge bulking mainly occurs when the wastewater temperature is low and the sludge load is high. When the microbial load is high, the bacteria absorb a large amount of nutrients. Due to the low temperature, the metabolic rate is slow, A large amount of highly viscous polysaccharides are accumulated, which greatly increases the attached water on the surface of activated sludge, and the SVI value is very high, forming sludge bulking. Ecological floating beds are also used for sewage treatment. For example, the Chinese invention patent application discloses a "three-dimensional ecological floating bed and its water purification method". This device can significantly improve the water quality improvement effect, especially the purification effect of refractory pollutants. In addition, the floating bed adopts the method of scattered water, which can provide a good habitat for aquatic animals without additional aeration and oxygenation devices. However, it only uses the method of ecological floating bed to strengthen the restoration of water body denitrification, and it cannot treat the sewage with low BOD concentration well.

Therefore, it is very valuable to study a sewage treatment system that combines Auberge oxidation ditch with ecological floating bed.

Utility model content

The technical problem to be solved by the utility model is to provide a sewage treatment system which combines the Aubert oxidation ditch and the ecological floating bed. The sewage treatment system using the combination of Aubert oxidation ditch and ecological floating bed can not only save land resources to the greatest extent, but also improve the treatment effect of sewage.

In order to solve the problems of the technologies described above, the technical scheme adopted in the utility model is as follows:

A sewage treatment system combining Aubert oxidation ditch and ecological floating bed, including Aubert oxidation ditch composed of three concentric circular channels with sewage inlet and outlet and ecological floating bed pool, pretreated sewage is treated in Auber oxidation ditch After flowing into the ecological floating bed pool for further purification, the ecological floating beds in the floating bed pool are connected by hooks, and at least two floating beds are connected in turn, and the ecological floating beds include fillers, plants and planting frames.

Preferably, the Obel oxidation ditch integrates aeration and sedimentation.

As a preference, the ecological floating bed pool body is cylindrical, the bottom of the pool is conical, has a water inlet channel and a mud discharge pipe, and uses gravity sedimentation to remove sludge.

Preferably, the pipelines are all provided with valves.

As a preference, the bed body of the floating bed is made of molded environment-friendly polyethylene material, and the planting frame is made of polystyrene.

Preferably, the filler can be activated carbon, ceramsite or spherical suspended filler.

Preferably, the planted aquatic plants are emergent plants such as cress, calamus and water spinach.

Preferably, the density of the planted emergent plants is 18 plants/m ² .

Due to the adoption of the above-mentioned technical scheme, the technical progress of the utility model compared with the prior art is that the utility model adopts the sewage treatment system combined with the Aubert oxidation ditch and the ecological floating bed, which not only can save land resources to the greatest extent, It can also improve the treatment effect of sewage. Among them, the Aubert oxidation ditch integrates aeration and sedimentation. The sewage first flows through the Aubert oxidation ditch, where COD, BOD, TN, TP, etc. are initially absorbed and removed during the synchronous nitrification and denitrification process in the Aubert oxidation ditch, and the dissolved oxygen in the water is increased through aeration. The ecological floating bed utilizes the characteristics that large aquatic plants can absorb nitrogen, phosphorus and other elements during the growth process, and the root system of the plant has a huge specific surface area, which can provide a good adsorption carrier for microorganisms in the water body and form a biofilm carrier. It can well adsorb the suspended matter in the water body, and the plant root system can also enrich a series of heavy metal elements and organic pollutants in the water body. Finally, after the plant grows and matures, the plant is removed from the water body to make the water body Pollutants are greatly reduced, and water quality is improved, thus creating ecological environment conditions for the survival and reproduction of aquatic organisms, and making it possible to restore aquatic ecosystems.

The sewage treatment system adopted by the utility model does not add any chemical agents in the whole process, and utilizes physical adsorption and biological action to purify urban domestic sewage. And the system is easy to maintain, and the overall material selection is diverse. The environmentally friendly polyethylene material can be used, which is convenient to obtain materials; the whole is easy to disassemble and assemble and has good coordination; the selection of the water purification filter layer is also easy to obtain materials, and is easier to promote on a large scale.

The utility model is suitable for sewage treatment of urban sewage before being discharged into river courses.

The utility model will be further described in detail in conjunction with the accompanying drawings and specific embodiments below.

Description of drawings

Figure 1 is a top view of the Auber oxidation ditch

Figure 2 is a top view of the ecological floating bed

Fig. 3 is the structural schematic diagram of planting frame of this ecological floating bed plant

Fig. 4 is the sectional view of this ecological floating bed pool

In the figure: 1—outer ditch of Auber oxidation ditch, 2—middle ditch, 3—inner ditch, 4—center island, 5—ecological floating bed pool, 6—aeration disc, 7—ecological floating bed, 8—planting hole, 9—hook connection hole, 10—floating bed body, 11—filler, 12—emergent plants, 13—inlet channel of floating bed pool, 14—silt discharge pipe

detailed description

As shown in Figure 1, a sewage treatment system combining Aubert oxidation ditch and ecological floating bed, it is composed of Aubert oxidation ditch and ecological floating bed pond with sewage inlet and outlet, aeration and sedimentation integrated. Sewage enters from the outer ditch of Auber Oxidation Ditch, enters the middle ditch and the inner ditch in turn, and flows into the ecological floating bed pool through the adjustable weir gate of the central island after circulating.

As shown in Figure 2, the ecological floating bed includes fillers, plants and planting boxes. The upper layer of the planting frame of the ecological floating bed is emergent plants, and the lower layer is filler. The floating beds are connected by hooks. The material of the floating bed body is made of environmentally friendly polyethylene material. The material of the planting frame is polystyrene, which is made into the shape of a flower pot. The upper edge is stuck on the planting hole of the floating bed body, and the inside is filled with filler. The edge of the floating bed is fixed on the pool wall with a traction rope.

As shown in Figure 3, the filler can be activated carbon, ceramsite or spherical suspension filler. The aquatic plants planted are emergent plants such as cress, calamus and water spinach. The density of the planted emergent plants was 18 plants/m ² . In the process of wastewater treatment, a biofilm is formed on the surface of the filler, and microorganisms are used to oxidize and decompose organic matter, which improves the removal rate of organic matter in wastewater and increases the stability of toxic substances and load changes.

As shown in Figure 4, the ecological floating bed pool includes an ecological floating bed 7, a water inlet channel 13, and a mud discharge pipe 14. The body of the ecological floating bed pool is cylindrical, and the bottom of the pool is conical. The generated sludge is settled by its own gravity and removed from the sludge discharge pipe 14 .

The ecological floating bed utilizes the characteristics that aquatic plants can absorb nitrogen, phosphorus and other elements during the growth process, and the root system of the plant has a huge specific surface area, which can provide a good adsorption carrier for microorganisms in the water body and form a biofilm carrier. It is very good at adsorbing the suspended matter in the water body, and the plant root system can also enrich a series of heavy metal elements and organic pollutants in the water body. Finally, after the plant grows and matures, the plant is moved away from the water body, so that the pollution in the water body The water quality is greatly reduced, thereby creating ecological environment conditions for the survival and reproduction of aquatic organisms, and making it possible to restore the water ecosystem.

The sewage treatment system combined with the Aubert oxidation ditch and the ecological floating bed has a stronger treatment effect than the single oxidation ditch for sewage treatment. The utility model utilizes physical adsorption and biological action to purify water without adding any chemical agent. While purifying sewage, it also saves the floor area, and at the same time has the effect of beautiful waters.

Claims (8)

1. A sewage treatment system combining Aubert oxidation ditch and ecological floating bed is characterized in that it includes Aubert oxidation ditch and ecological floating bed pond, and the pretreated sewage flows into the ecological floating bed pond for further purification after being processed in Aubert oxidation ditch , wherein the ecological floating beds in the floating bed pool are connected by hooks, and at least two floating beds are connected in sequence. 2. The sewage treatment system combined with Aubert oxidation ditch and ecological floating bed according to claim 1, characterized in that: the body of the ecological floating bed pool is cylindrical, and the bottom of the pool is conical. 3. The sewage treatment system combining the Aubert oxidation ditch and the ecological floating bed according to claim 2, characterized in that: the ecological floating bed pool has a water inlet channel and a mud discharge pipe. 4. The sewage treatment system combining the Aubert oxidation ditch and the ecological floating bed according to claim 2, characterized in that: the sludge in the ecological floating bed pool is removed by gravity settling. 5. The sewage treatment system combining Aubert oxidation ditch and ecological floating bed according to claim 2, characterized in that: said ecological floating bed includes planting frame, filler, floating bed body and plants. 6. The sewage treatment system combining Aubert oxidation ditch and ecological floating bed according to claim 5, characterized in that: the bed material of the floating bed is made of environmentally friendly polyethylene material. 7. The sewage treatment system combined with Aubert oxidation ditch and ecological floating bed according to claim 5, characterized in that: the planting frame is made of polystyrene. 8. The sewage treatment system combining Aubert oxidation ditch and ecological floating bed according to claim 5, characterized in that: the floating bed filler is activated carbon, ceramsite or spherical suspension filler.