CN205710291U - MULTI CONTACT point source sewage disposal system - Google Patents

Abstract

This utility model discloses a multi-stage contact point source wastewater treatment system, comprising a tank containing a primary anaerobic biological zone, a secondary anaerobic biological zone, a contact aerobic zone, a sedimentation zone, and a disinfection zone. The primary anaerobic biological zone has an inlet at its upper part. The bottom of the primary anaerobic biological zone and the upper part of the secondary anaerobic biological zone are connected by baffles. The bottom of the secondary anaerobic biological zone and the upper part of the contact aerobic zone are also connected by baffles. The bottom of the contact aerobic zone is connected to the sedimentation zone. A disinfection zone is located above the sedimentation zone, and an outlet is located on the side of the disinfection zone. This utility model has advantages such as small footprint, simple operation, and convenient management.

Description

Multi-stage contact point source sewage treatment system

technical field

The utility model relates to domestic sewage treatment equipment, in particular to an integrated domestic sewage system suitable for domestic sewage treatment and recycling.

Background technique

At present, the treatment technology of domestic sewage in rural areas is backward, only simple septic tank treatment, and the septic tank has effective treatment capacity for domestic sewage, but the water output effect is poor, and cannot be directly discharged or recycled. There are even many domestic sewage in rural areas that are discharged directly without septic tank treatment at all, resulting in eutrophication of rivers and polluted farmland, seriously affecting the living environment and people's health in rural areas. With the negative impact of the above pollution becoming more and more obvious, the control of rural domestic sewage pollution has become urgent. At the same time, the scattered domestic sewage treatment equipment in rural areas is backward, and rural areas have the characteristics of scattered residence and complex terrain. It is difficult to realize large-scale collection of urban domestic sewage and then centralized treatment. Moreover, the economic conditions in rural areas are poor, and there is a lack of professional management and technical personnel. , It is also difficult to bear the huge investment and high level of operation and management of the urban domestic sewage treatment system.

Utility model content

The technical problem to be solved by the utility model is to provide a multi-stage contact point source sewage treatment system, which is suitable for the treatment of scattered domestic sewage in rural areas, and has low investment and operation costs, and does not require specialized technical personnel to manage.

The utility model solves the above technical problems with the following technical solutions:

The utility model multi-stage contact point source sewage treatment system comprises a tank body, and the tank body is provided with an anaerobic biological zone, a contact aerobic zone, a sedimentation zone and a disinfection zone, and the upper part of the anaerobic biological zone is provided with a water inlet, The bottom of the anaerobic biological zone is connected to the upper part of the contact aerobic zone through baffles, the bottom of the contact aerobic zone is connected to the sedimentation zone, the upper part of the sedimentation zone is provided with a connected disinfection zone, and the side of the disinfection zone is set There is a water outlet.

The anaerobic biological zone includes a primary anaerobic biological zone and a secondary anaerobic biological zone, the bottom of the primary anaerobic biological zone and the upper part of the secondary anaerobic biological zone are connected through baffles, Composite anaerobic biological fillers are provided inside the zone and the secondary anaerobic biological zone, and aerobic biological fillers are provided inside the contact oxidation zone. On the board, a microporous gas explosion device is provided under the aerobic biological filler.

A return pipe is set between the contact oxidation zone and the secondary anaerobic biological zone.

The disinfection area is provided with a dosing device and a mixing chamber, and a water outlet weir is arranged between the mixing chamber and the water outlet.

The top of the tank body is provided with a plurality of sealing cover plates, so that the tank body forms a closed state.

Compared with the existing rural distributed domestic sewage treatment technology, the utility model multi-level contact point source sewage treatment system has the following characteristics:

1. The biochemical reaction tank is horizontal and rectangular, and adopts a combined treatment process, involving baffled anaerobic biological filter, biological contact oxidation and precipitation and other treatment processes, which are closely connected and organically integrated.

2. There are fillers in the primary anaerobic biological zone, secondary anaerobic biological zone and contact oxidation zone adopted by the utility model. The filler maintains a large porosity and can prevent blockage due to changes in suspended matter in incoming water. At the same time, it also provides sufficient specific surface area and good attachment environment for the attachment and growth of microorganisms.

3. The device of the utility model mainly adopts the gravity flow, thereby reducing the power consumption of the equipment and saving the economic cost.

4. The structure of the utility model is integrated, the floor area is small, the operation and maintenance are simple and low cost, it can improve the treatment efficiency of distributed domestic sewage, improve the comprehensive utilization rate, and has high economic and social benefits, especially suitable for small and medium-sized Domestic sewage treatment in urban and rural scattered areas.

Description of drawings

Fig. 1 is a structural schematic diagram of the multi-stage contact point source sewage treatment system of the present invention.

In the figure: 1-tank; 2-first-level anaerobic biological zone; 3-secondary anaerobic biological zone; 4-contact aerobic zone; 5-sedimentation tank; 6-disinfection zone; 7-water inlet; 8- Water outlet; 9-mixing chamber; 10-aerobic biological filler; 11-dosing device; 12-first-level anaerobic biological area grid plate; 13-composite biological filler; 14-first-level anaerobic baffle; 15 - the grid plate of the secondary anaerobic biological area; 16 - the secondary anaerobic baffle; 17 - the return pipe; 18 - the aeration device; 19 - the cover plate; 20 - the outlet weir; 21 - the return pump.

detailed description

Below in conjunction with Fig. 1, the utility model multi-level contact point source sewage treatment system is further described:

As shown in Figure 1, the multi-stage contact point source sewage treatment system of the present invention includes a tank body 1, which is provided with a first-level anaerobic biological zone 2, a second-level anaerobic biological zone 3, and a contact aerobic biological zone through a plurality of partitions. Area 4, sedimentation area 5 and disinfection area 6, the upper part of the first-level anaerobic biological area 2 is provided with a water inlet 7, the bottom of the first-level anaerobic biological area 2 and the upper part of the second-level anaerobic biological area 3 pass through the first-level anaerobic biological area. The baffles 14 are connected, the bottom of the secondary anaerobic biological zone 3 is connected with the top of the contact aerobic zone 4 through the secondary anaerobic baffle 16, and the bottom of the contact aerobic zone 4 is connected with the precipitation zone 5, The upper part of the precipitation area 5 is provided with a connected disinfection area 6 , and a water outlet 8 is provided on the side of the disinfection area 6 .

The lower part of the primary anaerobic biological zone 2 is provided with a primary anaerobic biological zone grid plate 12, and an aerobic biological filler 13 is placed on the primary anaerobic biological zone grid plate 12; in the secondary anaerobic biological zone 3 The lower part is provided with a secondary anaerobic biological area grid plate 15, and an aerobic biological filler 13 is placed on the secondary anaerobic biological area grid plate 15; Oxygen biological filler 10, a microporous gas explosion device 18 is provided below the aerobic biological filler 10, and the microporous aeration device 18 is connected to an external blower through an air duct; at the same time, a return pump 21 is set inside the contact oxidation zone 4 A return pipe 17 is provided between the secondary anaerobic biological zone 3 and the contact oxidation zone 4, and the outlet water of the return pump 21 flows into the secondary anaerobic biological zone 3 through the return pipe 17.

The utility model is provided with a dosing device 11 and a mixing chamber 9 in the disinfection area 6 , and a water outlet weir 20 is arranged between the mixing chamber 9 and the water outlet 8 .

The utility model is provided with a plurality of sealing cover plates 19 on the top of the tank body, so that the tank body forms a closed state.

The working principle of the utility model is as follows:

Due to the good biodegradability of domestic sewage and containing a certain amount of nitrogen and phosphorus, domestic sewage first enters the first-level anaerobic biological zone 2, relying on the microbial bacteria attached to the composite biological filler 13 inside the first-level anaerobic biological zone 2 , there are mainly hydrolytic acid-producing bacteria, hydrogen-producing bacteria and methanogenic bacteria to degrade organic matter in domestic water and convert them into small molecules to reduce the biochemical oxygen demand of sewage; at the same time, the first-level anaerobic biological zone 2 has Mixing, sedimentation separation and primary filtration, etc., so it occupies a large volume. The bottom side of the primary anaerobic biological zone 2 passes through the primary anaerobic baffle 14 and the side above the secondary anaerobic baffle 3 connected.

In order to improve the treatment efficiency of domestic sewage, the utility model is equipped with a secondary anaerobic biological zone 3, whose main function is to further reduce the biochemical oxygen demand of domestic sewage through the microorganisms attached to the filler and perform denitrification and denitrification, and the domestic sewage enters the secondary After the first-level anaerobic biological zone 3, the concentration of suspended solids and organic pollutants in the sewage has been significantly reduced; the bottom side of the second-level anaerobic biological zone 3 is connected to the upper side of the contact oxidation zone 4 through the second-level anaerobic baffle plate 16 connected.

The domestic sewage after the secondary anaerobic treatment enters the contact aerobic zone 4. According to the water quality characteristics of the domestic sewage, the best choice for the aerobic process is biological contact oxidation, and the contact oxidation zone 4 is provided with some aerobic biological fillers 10, The bottom is artificially aerated, so that some microorganisms are attached to the filler 10, and some microorganisms are suspended in the water in a fluidized state; the bottom side of the contact aerobic zone 4 is directly connected to the bottom side of the sedimentation tank 5 .

The effluent from the contact oxidation zone 4 brings out the stripped sludge, and the sedimentation zone 5 can make the sludge settle so that the effluent becomes clear. Since the domestic sewage contains parasitic bacteria, the effluent from the sedimentation area 5 enters the disinfection area 6 for disinfection. Specifically, the chemical disinfectant is added to the mixing chamber 9 through the dosing device 11, so that the effluent is sterilized and then overflows through the outlet weir 20 and enters Outlet 8, to achieve discharge standards.

Claims (4)

1. A multi-stage contact point source sewage treatment system, comprising a tank body, characterized in that the tank body is provided with an anaerobic biological zone, a contact aerobic zone, a sedimentation zone and a disinfection zone, and the upper part of the anaerobic biological zone is provided with an inlet Shuikou, the bottom of the anaerobic biological zone is connected with the upper part of the contact aerobic zone through the baffle plate, the bottom of the contact aerobic zone is connected with the sedimentation zone, and the upper part of the sedimentation zone is provided with a connected disinfection zone, and the side of the disinfection zone There is a water outlet on the side; the anaerobic biological zone includes a primary anaerobic biological zone and a secondary anaerobic biological zone, and the bottom of the primary anaerobic biological zone is connected to the upper part of the secondary anaerobic biological zone through a baffle The interior of the primary anaerobic biological zone and the secondary anaerobic biological zone are equipped with composite anaerobic biological fillers, and the interior of the contact oxidation zone is equipped with aerobic biological fillers. The aerobic biological fillers and composite anaerobic biological fillers are placed on the On the grid plate located at the lower part of each area, a microporous gas explosion device is installed under the aerobic biological filler. 2. The multi-stage contact point source sewage treatment system according to claim 1, characterized in that a return pipe is provided between the contact oxidation zone and the secondary anaerobic biological zone. 3. The multi-stage contact point source sewage treatment system according to claim 1, characterized in that, the disinfection area is provided with a dosing device and a mixing chamber, and an outlet weir is arranged between the mixing chamber and the water outlet. 4. The multi-stage contact point source sewage treatment system according to claim 1, characterized in that, the top of the tank body is provided with a plurality of sealing covers, so that the tank body forms a closed state.