Domestic sewage integrated treatment equipment

Abstract

The utility model belongs to the technical field of biochemical treatment of domestic sewage, and discloses integrated treatment equipment for domestic sewage, which comprises an adjusting tank lifting pump, an adjusting tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a nitrification liquid reflux pump, a rotary fan, a sludge reflux pump, a disinfection tank, a concentration tank, a sludge feeding pump, a volute dehydrator, a filtrate delivery pump and a drainage tank. The MBBR technology is adopted, the volume load is high, and the occupied area can be reduced; wherein the anoxic tank and the aerobic tank both adopt an MBBR (Moving Bed Biofilm Reactor) process, so that the water quality change adaptability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of biochemical treatment of domestic sewage and relates to integrated domestic sewage treatment equipment. Background Art

[0002] Domestic sewage treatment equipment can be divided into two categories: traditional domestic sewage treatment equipment and integrated domestic sewage treatment equipment. Traditional domestic sewage treatment equipment generally uses traditional biochemical treatment processes, which are energy-intensive, costly, and complex to install. In his article "Analysis of the Process of Integrated Rural Domestic Sewage Treatment Equipment," Li Guohao notes that integrated domestic sewage treatment equipment utilizes highly efficient sewage treatment processes. Due to its low energy consumption, low maintenance costs, and ease of installation, it has become a major trend in domestic sewage treatment equipment. However, in actual applications, integrated treatment equipment has been found to have significant issues such as large footprint and poor adaptability to water quality fluctuations. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an integrated domestic sewage treatment device to achieve the purpose of reducing floor space and improving adaptability to water quality changes.

[0004] The technical solution of this utility model:

[0005] An integrated domestic sewage treatment device includes a regulating tank lift pump 1, a regulating tank 2, an anaerobic tank 3, an anoxic tank 4, an aerobic tank 5, a secondary sedimentation tank 6, a nitrification liquid return pump 7, a rotary fan 8, a sludge return pump 9, a disinfection tank 10, a concentration tank 11, a sludge feed pump 12, a screw press dewatering machine 13, a filtrate delivery pump 14, and a drainage tank 15;

[0006] The anaerobic tank 3, the anoxic tank 4 and the aerobic tank 5 are main reaction tanks. The anoxic tank 4 and the aerobic tank 5 are MBBR (moving bed biofilm reactors), in which MBBR fillers are installed;

[0007] The water inlet of the regulating tank 2 is connected to the regulating tank lifting pump 1, the water outlet of the regulating tank 2 is connected to the anaerobic tank 3, the water outlet of the anaerobic tank 3 is connected to the anoxic tank 4, the water outlet of the anoxic tank 4 is connected to the aerobic tank 5, the water outlet of the aerobic tank 5 is connected to the secondary sedimentation tank 6, the water outlet of the secondary sedimentation tank 6 is connected to the disinfection tank 10, and the water outlet of the disinfection tank 10 is connected to the drainage tank 15; wherein, a nitrification liquid reflux pump 7 leading to the anoxic tank 4 is provided at the bottom of the aerobic tank 5, and the nitrate mixed liquid in the aerobic tank 5 is refluxed to the anoxic tank 4 through the nitrification liquid reflux pump 7; a rotary fan 8 for aeration is provided at the bottom of the aerobic tank 5; a sludge reflux pump 9 is provided at the bottom of the secondary sedimentation tank 6, and after passing through the sludge reflux pump 9, the nitrate mixed liquid is refluxed to the anoxic tank 4; It is divided into two branches, one of which flows into the bottom of the anaerobic tank 3, and the other flows into the thickening tank 11. Part of the sludge in the secondary sedimentation tank 6 is returned to the anaerobic tank 3 through the sludge return pump 9 to supplement the sludge consumption, and the other part is sent to the thickening tank 11; a sludge feed pump 12 is provided at the bottom of the thickening tank 11, and the sludge therein is sent to the screw press dewatering machine 13 for sludge dewatering through the sludge feed pump 12; the screw press dewatering machine 13 is further connected to the regulating tank 2 through the filtrate delivery pump 14, and the filtrate produced therein is sent to the regulating tank 2 through the filtrate delivery pump 14; the bottom of the thickening tank 11 is connected to the regulating tank 2 through a pipeline, and the supernatant therein is sent to the regulating tank 2.

[0008] Beneficial effects of the utility model:

[0009] (1) The MBBR process has a high volume load and can reduce the floor space;

[0010] (2) Both the anoxic tank and the aerobic tank adopt MBBR technology to improve the adaptability to water quality changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural diagram of the integrated domestic sewage treatment equipment of the present utility model.

[0012] In the figure: 1 regulating tank lift pump; 2 regulating tank; 3 anaerobic tank; 4 anoxic tank; 5 aerobic tank; 6 secondary sedimentation tank; 7 nitrification liquid return pump; 8 rotary fan; 9 sludge return pump; 10 disinfection tank; 11 concentration tank; 12 sludge feed pump; 13 screw press dewatering machine; 14 filtrate transfer pump; 15 drainage tank. DETAILED DESCRIPTION

[0013] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0014] Example

[0015] like Figure 1 As shown, domestic sewage 150m 3 / d enters regulating tank 2 via regulating tank lift pump 1, then passes through anaerobic tank 3, anoxic tank 4, aerobic tank 5, secondary sedimentation tank 6, disinfection tank 10, and drainage tank 15. Anoxic tank 4 and aerobic tank 5 utilize the MBBR process. The nitrate-containing mixed liquid in aerobic tank 5 is returned to anoxic tank 4 via nitrification liquid return pump 7 for denitrification. A portion of the sludge from secondary sedimentation tank 6 is returned to anaerobic tank 3, while the remaining sludge is concentrated in thickening tank 11 and dewatered in screw press dewatering machine 13. The treated sludge is then discharged, and the phosphate-accumulating bacteria in the returned sludge release phosphorus, while also removing some BOD5. The supernatant from thickening tank 11 and the filtrate from sludge dewatering are returned to the regulating tank for further treatment.

Claims

1. An integrated domestic sewage treatment equipment, characterized in that: The integrated domestic sewage treatment equipment comprises a regulating tank lift pump (1), a regulating tank (2), an anaerobic tank (3), an anoxic tank (4), an aerobic tank (5), a secondary sedimentation tank (6), a nitrification liquid return pump (7), a rotary fan (8), a sludge return pump (9), a disinfection tank (10), a concentration tank (11), a sludge feed pump (12), a screw press dewatering machine (13), a filtrate delivery pump (14) and a drainage tank (15); The anaerobic tank (3), the anoxic tank (4), and the aerobic tank (5) are main reaction tanks, and the anoxic tank (4) and the aerobic tank (5) are MBBRs, in which MBBR fillers are added; The water inlet of the regulating tank (2) is connected to the regulating tank lifting pump (1), the water outlet of the regulating tank (2) is connected to the anaerobic tank (3), the water outlet of the anaerobic tank (3) is connected to the anoxic tank (4), the water outlet of the anoxic tank (4) is connected to the aerobic tank (5), the water outlet of the aerobic tank (5) is connected to the secondary sedimentation tank (6), the water outlet of the secondary sedimentation tank (6) is connected to the disinfection tank (10), and the water outlet of the disinfection tank (10) is connected to the drainage tank (15); wherein, a nitrification liquid reflux pump (7) leading to the anoxic tank (4) is provided at the bottom of the aerobic tank (5), and the nitrate-containing mixed liquid in the aerobic tank (5) is refluxed to the anoxic tank (4) through the nitrification liquid reflux pump (7); a rotary fan (8) for aeration is provided at the bottom of the aerobic tank (5); a sludge reflux pump (9) is provided at the bottom of the secondary sedimentation tank (6), and the sludge is refluxed to the nitrification liquid reflux pump (7). The reflux pump (9) is divided into two branches, one branch is fed into the bottom of the anaerobic tank (3), and the other branch is fed into the thickening tank (11). A part of the sludge in the secondary sedimentation tank (6) is returned to the anaerobic tank (3) through the sludge reflux pump (9) to supplement the sludge consumption, and the other part is sent to the thickening tank (11); a sludge feed pump (12) is provided at the bottom of the thickening tank (11), and the sludge therein is sent to the screw press dewatering machine (13) through the sludge feed pump (12) for sludge dewatering; the screw press dewatering machine (13) is further connected to the regulating tank (2) through the filtrate delivery pump (14), and the filtrate generated therein is sent to the regulating tank (2) through the filtrate delivery pump (14); the bottom of the thickening tank (11) is connected to the regulating tank (2) through a pipeline, and the supernatant therein is sent to the regulating tank (2).

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