CN218951191U - Domestic sewage treatment device - Google Patents

Abstract

The utility model provides a domestic sewage treatment device which comprises a filtering unit, a sewage purification unit and a sludge treatment unit which are sequentially connected, wherein the sewage purification unit is communicated with a deodorizing device; the deodorizing device comprises a pretreatment unit and a biological deodorizing unit which are sequentially arranged, and the domestic sewage treatment device can pre-absorb and neutralize part of harmful gases in the odor through the pretreatment unit, so that the part of the gases in the odor can be prevented from affecting microorganisms in the biological deodorizing unit, and the normal work of the biological deodorizing unit is ensured; the odor can be effectively purified by the biological deodorization unit.

Description

Domestic sewage treatment device

Technical Field

The utility model relates to the field of sewage treatment, in particular to a domestic sewage treatment device.

Background

Domestic sewage is waste water discharged in daily life of residents, and mainly originates from residential buildings and public buildings, such as houses, institutions, schools, hospitals, shops, public places, industrial enterprise toilets and the like. The pollutants contained in the domestic sewage are mainly organic matters (ammonia nitrogen, phosphorus-containing organic matters and nitrogen-containing organic matters); organic matters in domestic sewage are very unstable and are easy to be decomposed to generate malodor, and the air is seriously polluted.

The existing domestic sewage treatment device generally adopts a biological treatment method to purify organic matters in domestic sewage, namely, the biological treatment method utilizes the adsorption effect and the biological metabolism effect of microorganisms, and the recycling of the microorganisms and the separation and discharge of purified water are completed through the separation of mud and water after biochemical reaction, but the organic matters in the domestic sewage can be putrefying, so that the odor is heavy, the air environment of a factory building is influenced during transportation, and the biological treatment method can generate a large amount of odor such as ammonia gas, hydrogen sulfide and the like when the microorganisms metabolize the organic matters, and the atmospheric environment can be polluted by direct discharge.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a domestic sewage treatment apparatus for solving the problems of heavy odor of a factory building and serious air pollution caused by the difficulty in effective deodorization of the conventional domestic sewage treatment apparatus.

To achieve the above and other related objects, the present utility model provides a domestic sewage treatment apparatus, comprising a filtration unit, a sewage purification unit, and a sludge treatment unit connected in sequence, the sewage purification unit being communicated with a deodorizing apparatus;

the deodorizing device comprises a pretreatment unit and a biological deodorizing unit which are sequentially arranged.

In an embodiment of the utility model, the filtering unit comprises a grating well and an adjusting tank which are arranged in sequence.

In an embodiment of the utility model, the sewage purification unit includes an anaerobic unit, an aerobic unit, and a precipitation unit.

In one embodiment of the utility model, the anaerobic unit comprises an anaerobic tank and an anoxic tank.

In an embodiment of the utility model, the aerobic unit includes two aerobic tanks.

In an embodiment of the utility model, the sedimentation unit includes a biochemical sedimentation tank.

In an embodiment of the utility model, the pretreatment unit comprises a pre-spray tower, a circulating pump and an alkaline washing component, wherein the bottom end of the pre-spray tower is connected with the anaerobic unit, and the circulating pump sucks spray liquid at the bottom end of the pre-spray tower to the top end of the pre-spray tower.

In one embodiment of the utility model, the alkaline washing assembly comprises an alkaline liquor tank and an alkaline liquor feeding pump, wherein a stirrer is arranged in the alkaline liquor tank, and the alkaline liquor feeding pump is communicated with the alkaline liquor tank and the circulating pump.

In an embodiment of the utility model, the biological deodorization unit comprises a deodorization tower, a spray pump and a drainage pump, wherein the deodorization tower comprises a tower body, a packing layer positioned in the tower body, and a water scattering spray device positioned above the packing layer, the spray device is connected with the spray pump, and the drainage pump is connected with the bottom end of the tower body.

In one embodiment of the utility model, the sludge treatment unit comprises a sludge tank connected with the biochemical sedimentation tank and a plate-and-frame filter press connected with the sludge tank.

As described above, the present utility model has the following advantageous effects:

the pretreatment unit can pre-absorb and neutralize part of harmful gases in the odor, so that the microorganism in the biological deodorization unit is prevented from being influenced by part of the gases in the odor, and the normal operation of the biological deodorization unit is ensured; the odor can be effectively purified by the biological deodorization unit.

Drawings

Fig. 1 shows a flow chart of a domestic sewage treatment device disclosed in an embodiment of the utility model.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

Please refer to fig. 1. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

Referring to fig. 1, the present utility model provides a preferred embodiment:

a domestic sewage treatment device comprises a filtering unit, a sewage purification unit and a sludge treatment unit which are sequentially connected, wherein the sewage purification unit is communicated with a deodorizing device;

the deodorizing device comprises a pretreatment unit and a biological deodorizing unit which are sequentially arranged; organic pollutants in the wastewater are mainly expressed by BOD5 and CODcr, and the removal of the organic pollutants is mainly based on the adsorption effect and the biological metabolism effect of microorganisms, and the separation of the microorganisms and the clean water is completed by separating mud from water after biochemical reaction; microorganisms in activated sludge use a part of organic matters in sewage to synthesize new cells under the aerobic condition, and another part of organic matters are catabolized so as to obtain energy required by cell synthesis, and the final products are stable substances such as CO2, H2O and the like.

The filtering unit comprises a grid well and an adjusting tank which are sequentially arranged. The grid well can filter solid garbage in sewage, prevent the solid garbage from blocking a pipeline and influence the normal growth and propagation of microorganisms in activated sludge.

The sewage purification unit comprises an anaerobic unit, an aerobic unit and a precipitation unit.

The anaerobic unit comprises an anaerobic tank and an anoxic tank; hydrolyzing large-particle organic matter molecules into dissolved organic matter molecules in an anaerobic tank; the wastewater enters an anoxic tank by self-flowing, and denitrification is carried out in the anoxic tank.

The aerobic unit comprises two aerobic tanks; organic nitrogen, protein nitrogen and the like in the sewage are firstly oxidized or hydrolyzed to be converted into ammonia nitrogen under the aerobic or anaerobic condition, and then oxidized to be nitrate nitrogen under the action of aerobic autotrophic nitrifying bacteria, and the stage is called aerobic nitrifying; then under the anoxic condition, electrons and protons are provided by denitrifying bacteria and a carbon source exists, nitrate nitrogen is used as an electron acceptor, so that the nitrate nitrogen is reduced into nitrogen gas to escape from sewage, and the stage is called anoxic denitrification;

when the activated sludge process is used for treating sewage, the activated sludge is alternately operated in anaerobic and aerobic states, so that phosphorus accumulating bacteria which accumulate excessive phosphate can grow predominantly, and the phosphorus content of the activated sludge is higher than that of common activated sludge; phosphorus accumulating bacteria in the sludge release phosphorus in an anaerobic state, and excessive phosphorus is taken in an aerobic state, so that phosphorus in the wastewater is absorbed;

therefore, to carry out biological denitrification and dephosphorization of sewage, an anoxic/aerobic process is needed to form an anoxic tank and an aerobic tank; the anaerobic and aerobic environment can be created at different stages of a biological pond; i.e. all need anoxic/aerobic systems

The sedimentation unit comprises a biochemical sedimentation tank. In the biochemical sedimentation tank, due to the action of gravity, sludge is settled to the bottom of the tank, and clear water is filtered out.

The pretreatment unit comprises a pre-spray tower, a circulating pump and an alkaline washing assembly, wherein the bottom end of the pre-spray tower is connected with the anaerobic unit, and the circulating pump pumps spray liquid at the bottom end of the pre-spray tower to the top end of the pre-spray tower.

The alkaline washing component comprises an alkaline liquor tank and an alkaline liquor feeding pump, a stirrer is arranged in the alkaline liquor tank, and the alkaline liquor feeding pump is communicated with the alkaline liquor tank and the circulating pump. The anoxic tank and the anaerobic tank are provided with a great deal of odor, and the main pollutants are ammonia, hydrogen sulfide and sulfur dioxide; therefore, most ammonia, hydrogen sulfide and sulfur dioxide can be removed through the pre-spray tower, passivation failure of a filler layer of the deodorizing tower caused by excessive sulfur dioxide and ammonia is avoided, and residual ammonia, hydrogen sulfide and other harmful gases are metabolically decomposed or absorbed through the biological deodorizing unit

The biological deodorization unit comprises a deodorization tower, a spray pump and a drainage pump, wherein the deodorization tower comprises a tower body, a packing layer positioned in the tower body, and a water scattering spray device positioned above the packing layer, the spray device is connected with the spray pump, and the drainage pump is connected with the bottom end of the tower body.

The sludge treatment unit comprises a sludge tank connected with the biochemical sedimentation tank and a plate-and-frame filter press connected with the sludge tank.

Wherein the aerobic tank 1, the aerobic tank 2 and the anoxic tank are also provided with fans for supplying oxygen; the mixed liquid in the aerobic tank 2 can be led to flow back to the anoxic tank, so that the content of microorganisms for purification in the anoxic tank is improved; in addition, part of sludge separated from the biochemical sedimentation tank can flow back to the anaerobic tank, so that the content of microorganisms for purification in the anaerobic tank is improved, and redundant sludge is introduced into the sludge tank for sludge treatment.

In the utility model, domestic sewage automatically flows into the regulating tank through the main pipe, and then is pumped into the anaerobic tank through the lift pump; large-particle organic matter molecules are hydrolyzed into dissolved organic matter molecules by anaerobic bacteria in an anaerobic tank; the wastewater automatically flows into an anoxic tank, denitrification is carried out in the anoxic tank, then automatically flows into an aerobic tank 1 and an aerobic tank 2 in sequence, and residual organic matters are degraded through activated sludge; finally, mud-water separation is carried out through a biochemical sedimentation tank, separated supernatant fluid automatically flows into a discharge tank for storage or recycling, and precipitated sludge is discharged into a sludge tank through a sludge pump and is stored after water removal through a plate-and-frame filter press, so that subsequent treatment is facilitated.

In summary, the pretreatment unit can pre-absorb and neutralize part of harmful gases in the odor, so that the microorganism in the biological deodorization unit is prevented from being influenced by part of the gases in the odor, and the normal operation of the biological deodorization unit is ensured; the odor can be effectively purified by the biological deodorization unit.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (8)

1. The domestic sewage treatment device is characterized by comprising a filtering unit, a sewage purification unit and a sludge treatment unit which are sequentially connected, wherein the sewage purification unit is communicated with a deodorizing device;

the deodorizing device comprises a pretreatment unit and a biological deodorizing unit which are sequentially arranged;

the pretreatment unit comprises a pre-spray tower, a circulating pump and an alkaline washing assembly, wherein the bottom end of the pre-spray tower is connected with the anaerobic unit, and the circulating pump sucks spray liquid at the bottom end of the pre-spray tower to the top end of the pre-spray tower;

the biological deodorization unit comprises a deodorization tower, a spray pump and a drainage pump, wherein the deodorization tower comprises a tower body, a packing layer positioned in the tower body and a scattered water spray device positioned above the packing layer, the spray device is connected with the spray pump, and the drainage pump is connected with the bottom end of the tower body.

2. A domestic sewage treatment apparatus according to claim 1, wherein the filtering unit comprises a grating well and an adjusting tank which are arranged in sequence.

3. The apparatus according to claim 1, wherein the sewage purification unit comprises an anaerobic unit, an aerobic unit, and a sedimentation unit.

4. A domestic sewage treatment apparatus according to claim 3, wherein the anaerobic unit comprises an anaerobic tank and an anoxic tank.

5. A domestic sewage treatment apparatus according to claim 3, wherein the aerobic unit comprises two aerobic tanks.

6. A domestic sewage treatment apparatus according to claim 3, wherein the sedimentation unit comprises a sedimentation unit comprising a biochemical sedimentation tank.

7. The apparatus according to claim 6, wherein the sludge treatment unit comprises a sludge tank connected to the biochemical sedimentation tank, and a plate-and-frame filter press connected to the sludge tank.

8. The domestic sewage treatment device according to claim 1, wherein the alkaline washing assembly comprises an alkaline liquor tank and an alkaline liquor feeding pump, a stirrer is arranged in the alkaline liquor tank, and the alkaline liquor feeding pump is communicated with the alkaline liquor tank and the circulating pump.

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