CN107986560A - Urban sewage treatment system - Google Patents

Abstract

The invention discloses an urban sewage treatment system, which comprises a settling pond, a facultative pond, an aerobic pond and an ecological purification sump connected in sequence, a domestic sewage filter pond connected to the settling pond, and a facultative pond connected to the Connected runoff water treatment unit. In the present invention, firstly, the urban domestic sewage is filtered by domestic sewage filter tanks, and the runoff water is naturally infiltrated and filtered by setting runoff water treatment units in urban roads, and then the filtered urban domestic sewage and runoff water are combined through the facultative pool to Wastewater is treated with facultative biochemical treatment, and then the organic matter is decomposed into inorganic matter through the aerobic pool to purify the water body, and finally the water body after evolution treatment is discharged to the ecological purification pool for storage, and at the same time, the residual water body is treated by aquatic organisms. Further purification of nitrogen and phosphorus can reduce costs while effectively ensuring the quality of effluent water for subsequent use.

Description

Urban sewage treatment system

technical field

The invention relates to an urban sewage treatment system.

Background technique

Municipal sewage includes domestic sewage, industrial wastewater and runoff sewage within urban areas. Domestic sewage is mainly the discharge water produced by various kitchen water, washing water and toilet water used in human life, and most of them are non-toxic inorganic salts. Domestic sewage also contains a large amount of organic matter, such as cellulose, starch, sugar and fatty protein; it also often contains pathogenic bacteria, viruses and parasite eggs; chloride, sulfate, phosphate, bicarbonate and sodium of inorganic salts , potassium, calcium, magnesium, etc. The general feature is that it contains high nitrogen and phosphorus content, and under the action of anaerobic bacteria, it is easy to generate odorous substances. The proportion of industrial wastewater in urban sewage varies from a few percent to tens of percent depending on the scale and level of urban industrial production. These often contain corrosive, toxic, harmful, and difficult-to-biodegrade pollutants. Therefore, industrial wastewater must be treated and discharged into the domestic sewage system after reaching a certain standard. Runoff sewage is the sewage formed by urban precipitation leaching air pollutants and scouring buildings, ground, waste residue and garbage.

The most important thing in urban sewage treatment is phosphorus and nitrogen removal. For biological phosphorus and nitrogen removal systems, due to the biological contradictions and competition between phosphorus removal bacteria and nitrogen removal bacteria, the main performance is different requirements for dissolved oxygen and sludge age. and competition for carbon sources. When the phosphorus removal effect is good, the nitrogen removal effect is poor, and vice versa, which makes it difficult to achieve satisfactory phosphorus and nitrogen removal at the same time with a simple series of phosphorus and nitrogen removal systems (such as oxidation ditch, SBR and A2O processes). Effect.

Contents of the invention

The object of the present invention is to provide an urban sewage treatment system, which has the characteristics of high degree of automation, good effect of phosphorus and nitrogen removal, and low cost.

In order to solve the above-mentioned technical problems, the present invention provides a kind of urban sewage treatment system, comprises the settling pond, the facultative pond, the aerobic pond and the ecological purification catchment pond connected successively, the domestic sewage filter pond connected with the described settling pond, and the The runoff water treatment unit connected to the aerobic pool; the domestic sewage filter tank is provided with a first filter net and a second filter net arranged obliquely, and the filter holes of the first filter net are larger than the filter holes of the second filter net , and the first filter screen is arranged above the second filter screen; the side wall of the domestic sewage filter tank is provided with the first filter residue collection box and the second filter residue collection box, and the first filter residue collection box The bottom of a filter residue collection box is flush with the lower end of the first filter screen, and the bottom of the second filter residue collection box is flush with the lower end of the second filter screen; the runoff water treatment unit includes an upper To the permeable bricks, crushed stone cushion, filter layer, permeable concrete layer and underground drainage pipeline arranged in sequence; the ecological purification sump communicates with the aerobic pool through the sixth pipeline, and the sixth pipeline is equipped with There is a fourth pump body; the ecological purification sump is provided with a planting grid for planting algae, the planting grid is provided with an adsorption net for adsorbing nitrogen and phosphorus, and the bottom of the ecological purification sump is provided with an air jet pipe , the air injection pipe is provided with several air injection heads.

Further, a filter net cleaning device is provided in the domestic sewage filter tank, and the filter net cleaning device includes a first nozzle arranged under the first filter mesh and a second nozzle arranged under the second filter mesh; The first spray head is connected with a first cleaning pipe, the second spray head is connected with a second cleaning pipe, and both the first cleaning pipe and the second cleaning pipe are connected to the sedimentation tank through a return pipe, and the return pipe There is a fifth pump body on it.

Further, the sedimentation tank is communicated with the sedimentation tank through a first pipeline, and a second valve body is provided on the first pipeline, and a third filter net for filtering flocs is provided in the sedimentation tank.

Further, the aerobic tank communicates with the sedimentation tank through a second pipeline, communicates with the underground drainage pipeline through a fourth pipeline, and the second pipeline is provided with a first pump body, and the fourth The pipeline is provided with a third valve body; the aerobic tank is provided with a first filler, and the bottom of the aerobic tank is provided with a first aeration pan.

Further, the first filler includes a second support rod and a second fiber bundle arranged on the second support rod.

Further, the aerobic pool communicates with the facultative pool through a fifth pipeline, and the fifth pipeline is provided with a third pump body; the aerobic pool is provided with a second filler, and the aerobic pool There is a second aeration pan at the bottom.

Further, the second filler includes a second support rod, a second fiber bundle arranged on the second support rod, and a fiber bundle fixed on the second support rod for covering the second fiber bundle the cage in it.

Further, the system also includes a sludge tank, and the sludge tank communicates with the bottom of the sedimentation tank through a third pipeline; the third pipeline is provided with a second pump body.

Further, the planting grid is connected with a floating bed through fiber cables.

Further, a planting bed is provided on the floating bed; a planting groove is opened on the planting bed; a number of evenly distributed planting holes are arranged in the planting groove, and guardrails are provided on both side walls of the planting groove.

The beneficial effects of the present invention are as follows: the application first uses the domestic sewage filter pool to filter the urban domestic sewage, and sets the runoff water treatment unit in the urban road to carry out natural infiltration and filtration of the runoff water, and then the filtered urban domestic sewage and runoff The water confluence performs facultative biochemical treatment of wastewater through the facultative pool, and then decomposes organic matter into inorganic matter through the aerobic pool to purify the water body, and finally discharges the water body after evolutionary treatment to the ecological purification pool for storage, and at the same time Using aquatic organisms to further purify the residual nitrogen and phosphorus in the water body can reduce costs and effectively ensure the quality of the effluent water for subsequent use.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the application and constitute a part of the application. In these drawings, the same reference numerals are used to indicate the same or similar parts. The illustrative embodiments of the application and their descriptions are used The purpose of explaining this application does not constitute an improper limitation of this application. In the attached picture:

Fig. 1 is the structural representation of an embodiment of the present invention;

Fig. 2 is the structural representation of the second filler of an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a second packing according to an embodiment of the present invention.

Among them: 1. Domestic sewage filter tank; 11. The first filter screen; 12. The second filter screen; 13. The first filter residue collection box; 14. The second filter residue collection box; 15. The first cleaning pipe; 16. The second Cleaning pipe; 2. Sedimentation tank; 21. Third filter screen; 22. Sludge tank; 3. Runoff water treatment unit; 31. Planting layer; 32. Water storage layer; 33. Grille; 34. Second drainage layer ; 35, underground drainage pipeline; 4, facultative tank; 41, first packing; 42, first aeration disc; 5, aerobic tank; 51, second packing; 511, support rod; 512, fiber bundle; 513, cage body; 52, second aeration disc; 6, ecological purification sump; 7, planting grid; 71, fiber cable; 72, adsorption net; 8, jet pipe; 81, jet head; 9, planting bed ;91, planting bed body; 92, planting groove; 93, planting hole; 94, guardrail; A, first pipeline; A1, second valve body; B, second pipeline; B1, first pump body; C, the first Three pipelines; C1, the second pump body; D, the fourth pipeline; D1, the third valve body; E, the fifth pipeline; E1, the third pump body; F, the sixth pipeline; F1, the fourth pump body; G , the seventh pipeline; G1, the fourth valve body; H, the return pipe; H1, the fifth pump body.

Detailed ways

The urban sewage treatment system as shown in Figure 1, comprises the settling pond 2 that communicates successively, the concurrently aerobic pond 4, the aerobic pond 5 and the ecological purification sump 6, the domestic sewage filter pond 1 that is communicated with described settling pond 2, and A runoff water treatment unit 3 communicating with the aerobic tank 4 . The present invention first utilizes the domestic sewage filter pool 1 to filter the urban domestic sewage, and sets the runoff water treatment unit 3 in the urban road to perform natural infiltration and filtration on the runoff water, and then the filtered urban domestic sewage and runoff water are combined to pass through the facultative Pool 4 performs facultative biochemical treatment of wastewater, and then decomposes organic matter into inorganic matter through aerobic pool 5 to purify the water body, and finally discharges the water body after evolutionary treatment to ecological purification pool 6 for storage, and at the same time utilizes water Biology further purifies the residual nitrogen and phosphorus in the water body, which can reduce the cost and effectively ensure the quality of the effluent water for subsequent use.

The message descriptions for each of the above components are as follows:

The first filter screen 11 and the second filter screen 121 which are arranged obliquely are arranged inside the domestic sewage filter tank 1, the filter holes of the first filter screen 11 are larger than the filter holes of the second filter screen 121, and the first filter screen 11 The filter screen 11 is disposed above the second filter screen 121 . Wherein, the first filter 11 can filter the large impurities in the sewage, and the second filter 121 can filter the particulate impurities in the sewage, which can improve the filtering efficiency.

The side wall of the domestic sewage filter tank 1 is provided with the first filter residue collection box 13 and the second filter residue collection box 14, and the bottom of the first filter residue collection box 13 is connected to the bottom of the first filter screen 11. The lower end is flush, and the bottom of the second filter residue collection box 14 is flush with the lower end of the second filter screen 121. The first filter residue collection box 13 and the second filter residue collection box 14 can be used to collect the filter residue after the first filter. Net 11 and the second filter screen 121 intercept impurities, the first filter residue collection box 13 and the second filter residue collection box 14 are provided with detachable covers, the impurities intercepted can be removed without disassembling the filter screen. Clean up promptly.

A filter net cleaning device is provided inside the domestic sewage filter tank 1 , and the filter net cleaning device includes a first spray head disposed below the first filter net 11 and a second spray head disposed below the second filter net 121 . The first spray head is connected with a first cleaning pipe 15, the second spray head is connected with a second cleaning pipe 16, and both the first cleaning pipe 15 and the second cleaning pipe 16 are connected to the sedimentation pipe through a return pipe H. pool 2, the return pipe H is provided with a fifth pump body H1. The filter screen flushing device can regularly backwash the filter screen to prevent the filter screen from clogging, which can improve the cleaning efficiency and improve the filtering effect at the same time.

The runoff water treatment unit 3 includes a permeable brick 31, a crushed stone cushion 32, a filter layer 33, a permeable concrete layer 34, and an underground drainage pipeline 35 arranged in sequence from top to bottom. Perform natural infiltration and filtration, and at the same time accelerate the infiltration rate of urban runoff water.

The sedimentation tank 2 communicates with the sedimentation tank 2 through the first pipeline A, and the first pipeline A is provided with a second valve body A1, and the sedimentation tank 2 is provided with a third valve for filtering flocs. filter screen 21.

The aerobic tank 4 communicates with the sedimentation tank 2 through the second pipeline B, communicates with the underground drainage pipeline 35 through the fourth pipeline D, and the second pipeline B is provided with a first pump body B1, The fourth pipeline D is provided with a third valve body D1; the aerobic tank 4 is provided with a first filler 41, and the bottom of the aerobic tank 4 is provided with a first aeration pan 42. Wherein, the first filler 41 includes a second support rod 511 and a second fiber bundle 512 disposed on the second support rod 511 , on the fiber bundle 512 .

The aerobic tank 5 is communicated with the aerobic tank 4 through the fifth pipeline E, and the fifth pipeline E is provided with a third pump body E1; the aerobic tank 5 is provided with a second filler 51, The bottom of the aerobic tank 5 is provided with a second aeration pan 52 . Wherein, the second filler 51 includes a second support rod 511, a second fiber bundle 512 arranged on the second support rod 511, and a fiber bundle fixed on the second support rod 511 for The cage body 513 in which the fiber bundle 512 is covered, the cage body 513 is a sphere composed of several rings, which can be used to cut air bubbles to increase the dissolved oxygen rate.

The ecological purification sump 6 communicates with the aerobic pool 5 through the sixth pipeline F, and the sixth pipeline F is provided with a fourth pump body F1; Planting grid 7, the adsorption net 72 that is used to adsorb nitrogen and phosphorus is provided in described planting grid 7, and the bottom of described ecological purification sump 6 is provided with air jet pipe 8, and described air jet pipe 8 is provided with some air jet nozzles 81 . The air injection pipe communicates with an air pump through a seventh pipeline G, and a fourth valve body G1 is arranged on the seventh pipeline G.

The algae has the functions of dephosphorization, decarbonization and deodorization of the material number, and can further purify the residual nitrogen and phosphorus in the water body, and can also improve the clarity of the water body in the ecological purification sump 6 . Moreover, the planting grid 7 is provided with an adsorption net 72, which can be used to absorb nitrogen and phosphorus elements in water and provide them to algae.

The planting grid 7 is connected with a floating bed 9 through a fiber cable 71, so as to salvage the planting grid 7 regularly and clean the algae therein in time. Described floating bed 9 is provided with planting bed 91, and described planting bed 91 is provided with planting groove 92; There are 94 guardrails. The planting bed 91 can be used for planting aquatic plants. On the one hand, it can absorb nutrient-rich sources and heavy metal minerals in the water body, and on the other hand, it can also enhance the ornamental value.

The system also includes a sludge tank 24, which can regularly discharge the sludge settled in the sedimentation tank 2 to the sludge tank 24 for removal. The top of the sludge tank is provided with a detachable cover for easy cleaning of the filter screen and sludge. The interior of the pool 24 is cleaned. The sludge tank 24 communicates with the bottom of the sedimentation tank 2 through a third pipeline C; the third pipeline C is provided with a second pump body C1.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. a kind of urban sewage treatment system, it is characterised in that including sedimentation basin, oxygen compatibility pool, aerobic tank and the life being sequentially communicated State purification collecting-tank, the sanitary sewage filtering ponds connected with the sedimentation basin, and at the runoff water connected with the oxygen compatibility pool Manage unit；The first filter screen and the second filter screen being obliquely installed, first filtering are equipped with the sanitary sewage filtering ponds The filter hole of net is more than the filter hole of the second filter screen, and first filter screen is arranged on the top of second filter screen； The side wall of the sanitary sewage filtering ponds be equipped with the first residue collection case and the second residue collection case, and described first The bottom of residue collection case is flushed with the bottom of first filter screen, the bottom of the second residue collection case and described the Two filter screen bottoms flush；The runoff water treatment unit includes up to the water-permeable brick, blotter, mistake set gradually Filtering layer and pervious concrete layer and subdrainage pipeline；The ecological purification collecting-tank is connected by the 6th pipeline and the aerobic tank It is logical, and the 6th pipeline is equipped with the 4th pump housing；The plantation grid of plantation algae, institute are equipped with the ecological purification collecting-tank The adsorption net being equipped with plantation grid for adsorption of nitrogen phosphorus is stated, the bottom of the ecological purification collecting-tank is equipped with air jet pipe, described Air jet pipe is equipped with some jet thrusts.

2. urban sewage treatment system according to claim 1, it is characterised in that be equipped with the sanitary sewage filtering ponds Filtering net cleaning device, the filtering net cleaning device include being arranged on the first nozzle below first filter screen and setting Put the second nozzle below the second filter screen；First nozzle is connected with the first cleaning pipe, and second nozzle is connected with Second cleaning pipe, first cleaning pipe and the second cleaning pipe are connected to the sedimentation basin, the reflux by a return duct Pipe is equipped with the 5th pump housing.

3. urban sewage treatment system according to claim 1, it is characterised in that the sedimentation basin by the first pipeline with The sedimentation basin connection, and first pipeline is equipped with the second valve body, is equipped with the sedimentation basin and is used to filter floccule 3rd filter screen.

4. urban sewage treatment system according to claim 1, it is characterised in that the oxygen compatibility pool by second pipe with The sedimentation basin connection, is connected by the 4th pipeline with the subdrainage pipeline, and the second pipe is equipped with the first pump Body, the 4th pipeline are equipped with the 3rd valve body；Be equipped with the first filler in the oxygen compatibility pool, the bottom of the oxygen compatibility pool is equipped with the One aeration plate.

5. urban sewage treatment system according to claim 4, it is characterised in that first filler includes the second support Bar and the second fibre bundle being arranged in the second support bar.

6. urban sewage treatment system according to claim 1, it is characterised in that the aerobic tank by the 5th pipeline with The oxygen compatibility pool connection, and the 5th pipeline is equipped with the 3rd pump housing；The second filler is equipped with the aerobic tank, it is described aerobic The bottom in pond is equipped with the second aeration plate.

7. urban sewage treatment system according to claim 6, it is characterised in that second filler includes the second support Bar, the second fibre bundle being arranged in the second support bar and being fixed in the second support bar is used for described the Two fibre bundles cover on cage body therein.

8. urban sewage treatment system according to claim 1, it is characterised in that the system further includes sludge-tank, described Sludge-tank is connected by the 3rd pipeline with the bottom of sedimentation basin；3rd pipeline is equipped with second pump housing.

9. urban sewage treatment system according to claim 1, it is characterised in that the plantation grid passes through rope cable It is connected with a floating bed.

10. urban sewage treatment system according to claim 9, it is characterised in that the floating bed is equipped with implant bed；Institute State and planting groove is offered on implant bed；Some equally distributed implantation holes, the both sides of the planting groove are equipped with the planting groove Wall is equipped with guardrail.