CN204939066U - A kind of sewage disposal and recycling system - Google Patents

Abstract

The utility model discloses a sewage treatment and recycling system, which includes a sewage collection tank and a secondary sedimentation tank. The system also includes a sewage collection tank for purifying the sewage discharged from the sewage collection tank and leading the purified water into the secondary sedimentation tank. biological contact oxidation pool. After the sewage is purified by this sewage treatment and recycling system, the removal rate reaches more than 80%, which effectively removes harmful substances in the sewage, thereby reaching the national sewage discharge standard. The system occupies a small volume, which is beneficial to Used in the family or dormitory, it relieves the pressure of the urban sewage treatment pool, reduces the cost, is more practical, can be popularized in every household, and reduces the damage to water resources at the same time.

Description

A sewage treatment and recycling system

technical field

The utility model belongs to the technical field of sewage treatment, in particular to a sewage treatment and recycling system.

Background technique

According to statistics, about 82.3% of the rivers, lakes and reservoirs in our country have been polluted, and 850 of the 1,200 rivers with monitoring systems in the country have been polluted. According to the monitoring results of 2222 monitoring stations across the country, only 33.2% of my country's seven major water systems meet Class I and Class II of the "Surface Water Environmental Quality Standards", 28.9% meet Class III standards, and 38.9% meet Class IV and V standards. . Among the 138 river sections in 138 cities, 133 river sections were polluted to varying degrees, accounting for 96.4% of the total. 53 river sections belonged to Grade V water quality, accounting for 38%, and 27 river sections belonged to Grade V water quality. River sections accounted for 20%, 26 river sections with Class IV water accounted for 20%, and Class II and III water accounted for only 23%.

Sewage treatment can not only solve the serious pollution of water sources, but also develop new water sources. It should be said that this is a cause with twice the result with half the effort. Therefore, in the face of the rising trend of domestic sewage, we can use household sewage treatment methods to reduce the discharge of large amounts of sewage into rivers and reuse water resources. However, there is no good domestic sewage treatment device at present. The existing domestic sewage device is expensive, complex in structure, large in size, and poor in treatment effect, which cannot meet the requirements of most families, causing a large amount of sewage to flow into rivers, destroying ecosystem.

Contents of the invention

The utility model aims at at least solving one of the technical problems existing in the prior art. For this reason, the utility model provides a sewage treatment and recycling system, the purpose of which is to purify the sewage without causing the harm of bulky sludge.

In order to achieve the above object, the technical scheme that the utility model takes is:

A sewage treatment and recycling system, including a sewage collection tank and a secondary sedimentation tank, the system also includes a biological contact oxidation tank for purifying the sewage discharged from the sewage collection tank and introducing the purified water into the secondary sedimentation tank .

Preferably, the biological contact oxidation pond includes a pond body, a packing layer arranged in the pond body, an aeration device arranged at the upper end and a lower end of the pond body, and a sewage channel arranged at the bottom of the pond body.

Preferably, the filler layer is a biological ceramsite layer.

Preferably, the pool body is provided with a baffle that divides the pool body into several sub-pool bodies, and an aeration device is provided at the upper end and the lower end of each sub-pool body.

More preferably, there are seven baffles, which are arranged sequentially from the water inlet end to the water outlet end of the pool body.

Preferably, the aeration device includes an aeration element, and the aeration element is an aeration head or a container pump, a water ejector, a pipeline mixer, and a filter head.

As a further improvement, the system also includes a pretreatment tank for removing inorganic particles and some organic substances. Pool water inlet connection.

Preferably, the pretreatment tank includes a dosing device and a stirring device for stirring and mixing the medicine and sewage.

Preferably, the system further includes a detection box connected to the discharge water of the secondary sedimentation tank for detecting the quality of the discharge water.

Preferably, the system further includes a disinfection treatment device connected to the discharge water of the secondary sedimentation tank.

The biological contact oxidation method is a biofilm process between the activated sludge method and the biological filter tank. It is characterized in that fillers are set in the tank, the bottom of the tank is aerated to oxygenate the sewage, and the aerated wastewater flows through Filling layer, and keep the sewage in the pool in a flowing state to ensure full contact between the sewage and the filler in the sewage, so that the surface of the filler particles is covered with a bacterial film, and the wastewater and the biofilm are in contact. Under the action of the biofilm, the wastewater is purified. .

The biofilm in the biological contact oxidation tank is composed of mycelium, filamentous bacteria, fungi, protozoa and metazoa. In the biological contact oxidation tank, the filamentous bacteria have a three-dimensional structure in the gap between the fillers, which greatly increases the contact surface between the biological phase and the wastewater. At the same time, because the filamentous bacteria have a strong oxidation ability to most organic matter, they have a relatively small impact on the change of water quality load. It has great adaptability, so it is a powerful factor to improve the purification ability.

Due to the large amount of biological solids in the biological contact oxidation tank and the complete mixing of water flow, it has a strong adaptability to sudden changes in water quality and quantity; the amount of residual sludge is small, there is no problem of sludge bulking, and the operation and management are simple.

Beneficial effects of the utility model: after the sewage is purified by the sewage treatment and recycling system, the removal rate reaches more than 80%, and the harmful substances in the sewage are effectively removed, thereby reaching the national sewage discharge standard. Its small size is beneficial to use in families or dormitories, relieves the pressure of urban sewage treatment pools, reduces costs, and is more practical. It can be popularized in every household and at the same time reduces the damage to water resources. Biological contact oxidation has a variety of purification functions. In addition to effectively removing organic pollutants, it can also be used to remove nitrogen and phosphorus, and has a strong adaptability to impact loads. The amount of sludge generated is small and no sludge is generated. The harm of swelling can ensure the quality of effluent water, no need for sludge backflow, easy maintenance and management, no filter flies, and no odor. This device can be used for household sewage treatment.

Description of drawings

This manual includes the following drawings, the contents shown are:

Fig. 1 is the left side view of the sub-pool body of the biological contact oxidation tank of the present invention;

Fig. 2 is the plan view of biological contact oxidation pond and secondary sedimentation pond of the present utility model;

Fig. 3 is a flowchart of the utility model.

Labeled in the figure:

1. Filling layer, 2. Aeration device, 3. Sewage channel, 4. Baffle plate, 5. Biological contact oxidation tank water inlet, 6. Secondary sedimentation tank, 7. Secondary sedimentation tank outlet, 8. Secondary sedimentation tank Secondary sedimentation tank outlet pipe.

detailed description

Next, with reference to the accompanying drawings, through the description of the embodiments, the specific implementation of the present utility model will be further described in detail, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present utility model , and contribute to its implementation.

As shown in Figures 1 to 3, a sewage treatment and recycling system includes a sewage collection tank and a secondary sedimentation tank 6. The biological contact oxidation tank of the secondary sedimentation tank.

Wherein the upper end of the sewage collection tank is provided with a sewage water inlet, and the lower end is provided with a water outlet and a sewage outlet. The sewage collection tank collects the wastewater generated in our daily life. Its function is to remove the suspended solids suspended in the sewage that can be precipitated, mainly to remove inorganic particles and some organic substances. The removal rate of suspended solids is above 70%-80%, the total SS removal rate is 50%-60%, and it can remove 20%-30% of organic matter.

The above-mentioned biological contact oxidation pond includes a pond body, a packing layer 1 arranged in the pond body, an aeration device 2 arranged at the upper end and a lower end of the pond body, and a sewage channel 3 arranged at the bottom of the pond body. Preferably, the filler layer 1 is a biological ceramsite layer. Preferably, the pool body is provided with a baffle plate 4 that divides the pool body into several sub-pool bodies, and an aeration device 2 is provided at the upper and lower ends of each sub-pool body. Specifically, the body of the biological contact oxidation pond is provided with seven baffles 4 in turn from one end of the water inlet 5 of the biological contact oxidation pond to the water outlet. To meet the requirements, the pool body is divided into eight sub-pool bodies, namely, sub-pool body I, sub-pool body II, sub-pool body III, sub-pool body IV, sub-pool body V, sub-pool body VI, and sub-pool body VII , Sub-pool body VIII. The baffle plate is used to separate the tank body, which increases the specific surface area of the biological phase and the sewage, and improves the purification capacity. Among them, the aeration device is used to provide oxygen for microorganisms in the tank. The middle of the biological contact oxidation tank body is a rectangular secondary sedimentation tank 6. The water flowing through the biological contact oxidation tank flows into the secondary sedimentation tank 6, and the lower end of the secondary sedimentation tank 6 A secondary sedimentation tank water outlet 7 is provided, which is connected to a secondary sedimentation tank outlet pipe 8, and the purified water can be recycled through the water outlet pipe after sedimentation.

Preferably, the aeration device 2 includes an aeration element, and the aeration element is an aeration head or a container pump, a water injector, a pipeline mixer, and a filter head. The biological contact oxidation tank adopts the biological contact oxidation method. In this method, the oxygen required by the microorganisms is supplied by blast aeration. After the biofilm grows to a certain thickness, the microorganisms in the filler wall will perform anaerobic metabolism due to lack of oxygen, and the generated gas and The scouring effect formed by aeration will cause the shedding of biofilm and promote the growth of new biofilm. At this time, the shed biofilm will flow out of the pool with the effluent.

In order to better treat the sewage, the system also includes a pretreatment tank for removing inorganic particles and some organic substances. Contact the water inlet connection of the oxidation tank. The pretreatment tank includes a dosing device and a stirring device for mixing the medicine and sewage. Specifically, the sewage flowing out of the water outlet of the sewage collection tank flows into the pretreatment tank through the pipeline and the water inlet of the pretreatment tank, and the PLC control system controls the dosing device to add FeCl ₃ , defoamer, Ca(OH) ₂ and NaOH solution, the pretreatment pool is equipped with a stirring device to mix evenly, and then stand still. FeCl ₃ plays the role of coagulation here, which is to make the colloidal particles in the sewage coalesce to achieve colloidal precipitation. The lower end of the pretreatment tank is provided with a water outlet and a sewage outlet. The pretreatment tank is to better remove inorganic particles and some organic substances, so that the suspended solids suspended in the sewage that are not completely removed in the sewage collection tank can be minimized in the pretreatment tank.

Preferably, the system further includes a detection box connected to the discharge water of the secondary sedimentation tank for detecting the quality of the discharge water. The detection box is provided with an inlet, an outlet and a return port. The return port is connected with the water inlet of the sewage collection tank. A control valve is installed in the detection box. When the quality of the water flowing in from the inlet of the detection box meets the preset standard, the control valve The valve controls the inlet of the testing box to communicate with the outlet of the testing box; when the quality of the water flowing in from the inlet of the testing box does not meet the preset standard, the control valve controls the inlet of the testing box to communicate with the return port. The setting of the detection box can detect the quality of the water treated by the sewage treatment system in real time. If the quality of the treated water does not meet the preset standard, the treated water will flow back to the sewage collection tank from the return port of the detection box and go to the sewage collection tank again. Filter until the quality of the treated water meets the preset standard, and the treated water flows out from the outlet of the detection box.

Preferably, the system also includes a disinfection treatment device connected to the discharge water of the secondary sedimentation tank. After disinfection treatment, and the main pollutants in the sewage meet the national discharge standards, it can be reused through recycling.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Apparently, the specific implementation of the present invention is not limited by the above methods. As long as the various insubstantial improvements made by adopting the method concept and technical solution of the present utility model; within the scope of protection.

Claims (10)

1. A sewage treatment and recycling system, comprising a sewage collection tank and a secondary sedimentation tank, characterized in that: the system also includes a sewage collection tank for purifying discharged sewage and the purified water into the secondary sedimentation tank The pool's biological contact oxidizes the pool. 2. The sewage treatment and recycling system according to claim 1, characterized in that: the biological contact oxidation tank includes a tank body, a packing layer arranged in the tank body, and an aeration device arranged at the upper and lower ends of the tank body And the sewage channel located at the bottom of the pool. 3. The sewage treatment and recycling system according to claim 2, characterized in that: the filler layer is a biological ceramsite layer. 4. The sewage treatment and recycling system according to claim 2, characterized in that: the pool body is provided with a baffle that divides the pool body into several sub-pool bodies, and the upper and lower ends of each sub-pool body are With aeration device. 5. The sewage treatment and recycling system according to claim 4, characterized in that there are seven baffles, which are arranged sequentially from the water inlet end to the water outlet end of the pool body. 6. The sewage treatment and recycling system according to any one of claims 2 to 4, characterized in that: the aeration device includes an aeration element, and the aeration element is an aeration head or a container pump, water Injectors, pipeline mixers, filter heads. 7. The sewage treatment and recycling system according to claim 1, characterized in that: the system also includes a pretreatment tank for removing inorganic particles and some organic substances, and the water inlet of the pretreatment tank is connected to the sewage The water outlet of the collecting device is connected, and the water outlet of the pretreatment tank is connected with the water inlet of the biological contact oxidation tank. 8 . The sewage treatment and recycling system according to claim 7 , wherein the pretreatment pool includes a dosing device and a stirring device for stirring and mixing the medicine and sewage. 9. The sewage treatment and recycling system according to claim 1, characterized in that the system further comprises a detection box connected to the discharge water of the secondary sedimentation tank for detecting the quality of the discharge water. 10. The sewage treatment and recycling system according to claim 1, characterized in that the system further comprises a disinfection treatment device connected to the discharge water of the secondary sedimentation tank.