CN210127163U - Rural ecological sewage treatment system is fused to triple effect - Google Patents

Rural ecological sewage treatment system is fused to triple effect Download PDF

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Publication number
CN210127163U
CN210127163U CN201920506749.1U CN201920506749U CN210127163U CN 210127163 U CN210127163 U CN 210127163U CN 201920506749 U CN201920506749 U CN 201920506749U CN 210127163 U CN210127163 U CN 210127163U
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treatment unit
tank
sewage
treatment
unit
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CN201920506749.1U
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李海龙
孔令岩
李伟
王燕强
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Shanxi Lyujie Environmental Protection Co Ltd
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Shanxi Lyujie Environmental Protection Co Ltd
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Abstract

The utility model discloses a three-effect integrated rural ecological sewage treatment system, which comprises a pretreatment unit, an LJ-BL treatment unit, an LJ-MB treatment unit, an LJ-EL treatment unit and a sludge treatment unit; the pretreatment unit removes suspended organic matters in the domestic sewage by using the principles of precipitation and anaerobic fermentation; the BJ biochemical treatment unit is used for treating wastewater through an anaerobic tank and an aerobic tankCODcr and BOD of5Carrying out degradation; the MB treatment unit carries out sewage treatment by combining high-efficiency membrane separation with an activated sludge method; the LJ-EL treatment unit further removes organic matters, heavy metals, nitrogen and phosphorus through the artificial wetland. The system has good water outlet effect, can meet the requirements of greening and farmland irrigation, and can directly recycle suspended matters and turbidity of the outlet water which are close to zero; compared with the traditional treatment system, the land use area can be saved by 50 percent; the plant landscape is good.

Description

Rural ecological sewage treatment system is fused to triple effect
Technical Field
The utility model relates to a three-effect integration rural ecological sewage treatment system, which belongs to the technical field of sewage treatment.
Background
Along with the improvement of rural living standard and living environment, the discharge amount of domestic wastewater of rural residents is increased day by day, the agricultural ecological environment and water body are polluted day by day, the rural living is dispersed, the centralized sewage treatment can not be carried out like a city, the rural sewage is treated by using the traditional sewage treatment method, one or more villages need to use one set of treatment system, the per-capita treatment cost is high, and villages and farmers can not bear the high cost, so that a sewage treatment system suitable for rural use is urgently to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the defects of the prior art and provides a three-effect integrated rural ecological sewage treatment system.
The utility model adopts the technical proposal that:
a three-effect integrated rural ecological sewage treatment system comprises a pretreatment unit, an LJ-BL treatment unit, an LJ-MB treatment unit, an LJ-EL treatment unit and a sludge treatment unit;
the pretreatment unit comprises a sedimentation tank and an acidification fermentation tank, pipe network sewage enters the sedimentation tank from an inlet of the sedimentation tank, an outlet of the sedimentation tank is communicated with an inlet of the acidification fermentation tank, a sewage outlet of the acidification fermentation tank is communicated with a sewage inlet of the LJ-BL treatment unit through a pipeline, a sewage outlet of the LJ-BL treatment unit is connected with a sewage inlet of the LJ-MB treatment unit through a pipeline, a sewage outlet pipeline of the LJ-MB treatment unit is connected with the LJ-EL treatment unit, and a sludge outlet pipeline of the LJ-MB treatment unit is connected with the sludge treatment unit; the effluent of the LJ-EL treatment unit is led to a disinfection unit.
The sedimentation tank and the acidification fermentation tank are arranged integrally, the outlet of the sedimentation tank is positioned at the middle upper part of the sedimentation tank, and the bottom of the sedimentation tank is provided with a sludge outlet pipe.
A grid is arranged in the LJ-BL processing unit; the LJ-BL treatment unit is divided into an anaerobic tank and an aerobic tank, the anaerobic tank is communicated with the aerobic tank, and sewage discharged from the acidification fermentation tank enters a sewage inlet at the top of the anaerobic tank; the bottom of the aerobic tank is provided with an aeration pipeline, the aeration pipeline is provided with a plurality of air holes and is communicated with an oxygen pump, and the top of the aerobic tank is provided with a sewage outlet.
A membrane aerobic area is arranged in the LJ-MB treatment unit and comprises a water collecting pipeline, a plurality of water collecting inlets are arranged on the water collecting pipeline, a filter membrane is arranged on each water collecting inlet, and the water collecting pipeline is connected with a vacuum pump; an aeration device is paved at the bottom of the membrane aerobic zone, the filter membrane is arranged at the upper part of the aeration device, and the outlet of the water collecting pipe is communicated with the LJ-EL treatment unit; and a sludge outlet is formed at the bottom of the LJ-MB treatment unit.
The LJ-EL treatment unit is a wetland system, the wetland system is provided with wetland fillers, and activated sludge is suspended and mixed in the wetland fillers; garden plants are planted on the wetland filler, and effluent of the LJ-EL treatment unit is introduced into a disinfection unit for disinfection treatment.
Compared with the prior art, the utility model beneficial effect who has is:
the system has good water outlet effect, can meet the requirements of greening and farmland irrigation, and simultaneously meets the requirement of discharge.
The suspended substances and turbidity of the effluent are close to zero, and the effluent can be directly recycled;
compared with the traditional treatment system, the land use area can be saved by 50 percent;
the plant area has good landscape, and the garden type sewage plant;
the influence of the surrounding environment is small,
the system has high automation degree, adopts PLC control, can realize full-process automatic control, and is beneficial to management;
the modular design, compact structure, area is little, and the working costs is cheap.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the system structure of the present invention.
Fig. 2 is a schematic diagram of the filtering direction of the membrane aerobic zone of the present invention.
FIG. 3 is a schematic diagram of a filtration membrane filtration system.
FIG. 4 is a schematic view of the processing manner of the LJ-EL processing unit.
Fig. 5 is a schematic diagram of the LJ-MB processing unit.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
1. A three-effect integrated rural ecological sewage treatment system is shown in figure 1 and comprises a pretreatment unit 1, an LJ-BL treatment unit 2, an LJ-MB treatment unit 3, an LJ-EL treatment unit 4 and a sludge treatment unit 5;
in the embodiment, the size of the LJ-BL treatment unit is 9m x 6m x 3m, and the whole LJ-BL treatment unit is subjected to carbon steel anticorrosion treatment;
the size of the LJ-MB treatment unit is 9 x 3m, and the inner part of the LJ-MB treatment unit adopts a film structure made of pollution-resistant and corrosion-resistant PVDF material;
the LJ-EL processing unit 4 has a size of 1000m2The interior of the wetland system adopts an underground reinforced concrete structure and adopts porous wetland fillers;
the pretreatment unit 1 comprises a sedimentation tank 11 and an acidification fermentation tank 12, pipe network sewage enters the sedimentation tank from an inlet of the sedimentation tank 11, an outlet of the sedimentation tank is communicated with an inlet of the acidification fermentation tank 12, a sewage outlet of the acidification fermentation tank 1 is communicated with a sewage inlet of an LJ-BL treatment unit 2 through a pipeline, a sewage outlet of the LJ-BL treatment unit 2 is connected with a sewage 3 inlet of an LJ-MB treatment unit through a pipeline, a sewage outlet pipeline of the LJ-MB treatment unit 3 is connected with an LJ-EL treatment unit 4, and a sludge outlet pipeline of the LJ-MB treatment unit 4 is connected with a sludge treatment unit 5; the effluent of the LJ-EL treatment unit 4 is passed to a disinfection unit.
The sedimentation tank 11 and the acidification fermentation tank 12 are integrally communicated, the outlet of the sedimentation tank 11 is positioned at the middle upper part of the sedimentation tank, and the bottom of the sedimentation tank is provided with a sludge outlet pipe 111.
A grid 21 is arranged in the LJ-BL processing unit 2; the LJ-BL treatment unit 2 is divided into an anaerobic tank 22 and an aerobic tank 23, the anaerobic tank 22 is communicated with the aerobic tank 23, and sewage discharged from the acidification fermentation tank 12 enters a sewage inlet at the top of the anaerobic tank 22; an aeration pipeline 24 is arranged at the bottom of the aerobic tank 23, a plurality of air holes 25 are arranged on the aeration pipeline 24, the aeration pipeline is communicated with an oxygen air pump 6, and a sewage outlet is arranged at the top of the aerobic tank 23.
A membrane aerobic zone 31 is arranged in the LJ-MB treatment unit 3, the membrane aerobic zone 31 comprises a water collecting pipeline 32, a plurality of water collecting inlets are arranged on the water collecting pipeline 32, a filter membrane 33 is arranged on each water collecting inlet, and the water collecting pipeline 32 is connected with a vacuum pump 34; an aeration device 36 is laid at the bottom of the membrane aerobic zone 31, the filter membrane 33 is arranged at the upper part of the aeration device 36, and the aeration device 36 is connected with an oxygen pump 6; the outlet of the water collecting pipe 32 is led to the LJ-EL processing unit 4; the bottom of the LJ-MB treatment unit 3 is provided with a sludge outlet 37.
The filter membrane is an immersion type ultrafiltration membrane.
The LJ-EL treatment unit 4 adopts a wetland system of porous wetland filler, the wetland system is provided with wetland filler 41, and activated sludge 42 is suspended and mixed in the wetland filler 41; the wetland filler is porous, garden plants 43 are planted on the wetland filler, and effluent of the LJ-EL treatment unit is introduced into the disinfection unit for disinfection treatment.
The garden plants include, but are not limited to, reed, vanilla, iris, which are suitable for growing.
2. The method for performing three-effect integrated rural ecological sewage treatment by using the sewage treatment system comprises the following steps:
step 1), collecting pipe network sewage into a sedimentation tank, and removing 50-60% of suspended matters through sedimentation for 12-24 hours; the upper water of the sedimentation tank after sedimentation flows into the acidification fermentation tank through a sedimentation tank outlet communicated with the acidification fermentation tank; the sludge in the sedimentation tank is regularly cleaned and transported;
step 2) adding anaerobic bacteria into the acidification fermentation tank, carrying out hydrolysis acidification, and decomposing macromolecular organic matters in the sewage into micromolecules to make the sewage be slightly acidic;
step 3), the sewage after hydrolytic acidification enters an LJ-BL treatment unit from an inlet at the top of an anaerobic tank, and a large number of facultative microorganisms exist in the anaerobic tank, wherein the microorganisms include but are not limited to: denitrifying bacteria, methanogen, nitrifying bacteria, yeast, corm bacteria, protozoa and metazoan, wherein the denitrifying bacteria utilize organic matters in the anaerobic tank and NO in the mixed liquid circulating in the aerobic tank3Denitrifying N to remove NO from waste water3By conversion of N to N2So as to transfer to the gas phase to finish the denitrification and COD degradation process;
the aerobic tank oxygenates the wastewater to provide dissolved oxygen that the aerobic microorganisms can survive. Aerobic microorganisms utilize oxygen in water to perform exogenous respiration and use organic matters in sewage to perform metabolism, thereby treating CODcr and BOD in wastewater5Carrying out degradation;
meanwhile, nitrifying bacteria in the LJ-BL treatment unit system are used for removing NH in the wastewater3Conversion of-N to NO3-N, completion of the reaction on NH in the wastewater3The degradation process of N ensures NH in the effluent of the LJ-BL unit3-N emissions up to standard;
step 4), allowing the sewage treated by the LJ-BL treatment unit to enter an LJ-MB treatment unit for biodegradation;
the water after biodegradation enters a membrane aerobic zone under the extraction action of a vacuum pump and a filtrate self-priming pump, all bacteria and suspended matters are intercepted in the membrane aerobic zone through a filter membrane and the high-efficiency interception action of the membrane, so that nitrifying bacteria are effectively intercepted, the nitration reaction is smoothly carried out, and NH3-N is effectively removed; meanwhile, macromolecular organic matters which are difficult to degrade can be intercepted, and the retention time of the macromolecular organic matters in the reactor is prolonged, so that the macromolecular organic matters are degraded to the maximum extent.
The microorganisms used by the LJ-MB treatment unit are nitrifying bacteria, yeasts, sulfur bacteria, protozoa, metazoans and the like.
The filtered solution is collected into a clean water tank through a water collecting pipe for discharging or recycling;
the sludge generated by the unit enters a sludge treatment unit for treatment;
and 5) introducing the filtered solution in the clean water tank into an LJ-EL treatment unit, wherein the water treatment of the LJ-EL treatment unit is divided into three forms:
physical precipitation: the precipitable solid is removed and filtered by gravity sedimentation in the wetland system, and the precipitable and floccable solid is intercepted and removed by the mutual attraction between particles and the interception of the plant root system;
chemical microbial metabolism: decomposing suspended matters, colloids and soluble solids into inorganic matters by utilizing the metabolic action of suspended activated sludge and bacteria parasitizing on plants; removing nitrogen by biological nitrification-denitrification; part of the trace elements are oxidized by microorganisms and plants and are removed by interception or combination; the microorganisms are mainly denitrifying bacteria, nitrifying bacteria, yeast, protozoa, metazoans and the like.
And (3) death by nature: bacteria and viruses can cause natural decay and death when being in unsuitable environment, the wetland system removes the bacteria and the viruses by utilizing the absorption of plant metabolism on organic matters, and plant root exudates have the inactivation effect on escherichia coli and pathogens;
plant absorption: part of nitrogen and phosphorus are absorbed and removed by plants, and the nitrogen and the phosphorus are absorbed and synthesized and then are moved out of the artificial wetland system;
step 6), sterilizing and inspecting the water treated by the LJ-EL treatment unit to be qualified, and using the water for production and life;
step 7), the sludge generated by the sedimentation tank and the LJ-MB treatment unit enters the sludge treatment unit, and is decomposed into stable inorganic matters through anaerobic fermentation for more than 3 months, and the putrescible biochemical sludge is converted into stable mature sludge, so that the structure of the sludge is changed, and the water content of the sludge is reduced; the sludge is periodically removed and transported out, buried or used as fertilizer.
In the step 2), CODcr and BOD are in a hydrolysis acidification stage5The change is not very big, and the CODcr and BOD are formed only in the gas production stage5Organic substances of (2) are mostly CO2And H2The form of the wastewater is escaped, so that CODcr and BOD in the wastewater are generated5And is significantly reduced.
Because the CODcr concentration of the domestic sewage is not high, the anaerobic process is generally controlled in a hydrolysis acidification stage only, and macromolecular organic matters in the sewage are converted into micromolecular organic matters, so that the treatment effect of the system is improved, and the treatment load of subsequent procedures is reduced.
For sewage with high CODcr concentration, methanogenic bacteria can be added into the sewage after the sewage is subjected to hydrolytic acidification treatment in the acidification fermentation tank, and micromolecular organic matters generated in the hydrolytic acidification stage are converted into methane under the action of the methanogenic bacteria.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art.

Claims (6)

1. A three-effect integrated rural ecological sewage treatment system is characterized by comprising a pretreatment unit, an LJ-BL treatment unit, an LJ-MB treatment unit, an LJ-EL treatment unit and a sludge treatment unit, wherein the pretreatment unit comprises a sedimentation tank and an acidification fermentation tank, pipe network sewage enters the sedimentation tank from an inlet of the sedimentation tank, an outlet of the sedimentation tank is communicated with an inlet of the acidification fermentation tank, a sewage outlet of the acidification fermentation tank is communicated with a sewage inlet of the LJ-BL treatment unit through a pipeline, a sewage outlet of the LJ-BL treatment unit is connected with a sewage inlet of the LJ-MB treatment unit through a pipeline, a sewage outlet pipeline of the LJ-MB treatment unit is connected with the LJ-EL treatment unit, and a sludge outlet pipeline of the LJ-MB treatment unit is connected with the sludge treatment unit; the effluent of the LJ-EL treatment unit is led to a disinfection unit.
2. The system of claim 1, wherein the settling tank and the acidification fermentation tank are integrated, the outlet of the settling tank is located at the middle upper part of the settling tank, and the bottom of the settling tank is provided with a sludge outlet pipe.
3. The three-effect integrated rural ecological sewage treatment system according to claim 1, wherein a grid is arranged in the LJ-BL treatment unit; the LJ-BL treatment unit is divided into an anaerobic tank and an aerobic tank, the anaerobic tank is communicated with the aerobic tank, and sewage discharged from the acidification fermentation tank enters a sewage inlet at the top of the anaerobic tank; the bottom of the aerobic tank is provided with an aeration pipeline, the aeration pipeline is provided with a plurality of air holes and is communicated with an oxygen pump, and the top of the aerobic tank is provided with a sewage outlet.
4. The system of claim 1, wherein a membrane aerobic zone is disposed inside the LJ-MB treatment unit, the membrane aerobic zone comprises a water collecting pipeline, a plurality of water collecting inlets are disposed on the water collecting pipeline, each water collecting inlet is provided with a filter membrane, and the water collecting pipeline is connected to a vacuum pump; an aeration device is paved at the bottom of the membrane aerobic zone, the filter membrane is arranged at the upper part of the aeration device, and the outlet of the water collecting pipe is communicated with the LJ-EL treatment unit; and a sludge outlet is formed at the bottom of the LJ-MB treatment unit.
5. The three-effect integrated rural ecological sewage treatment system according to claim 1, wherein the LJ-EL treatment unit is a wetland system, the wetland system is provided with wetland fillers, and activated sludge is suspended and mixed in the wetland fillers; garden plants are planted on the wetland filler, and effluent of the LJ-EL treatment unit is introduced into a disinfection unit for disinfection treatment.
6. The system of claim 4, wherein the filtration membrane is an immersion ultrafiltration membrane.
CN201920506749.1U 2019-04-15 2019-04-15 Rural ecological sewage treatment system is fused to triple effect Active CN210127163U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920506749.1U CN210127163U (en) 2019-04-15 2019-04-15 Rural ecological sewage treatment system is fused to triple effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920506749.1U CN210127163U (en) 2019-04-15 2019-04-15 Rural ecological sewage treatment system is fused to triple effect

Publications (1)

Publication Number Publication Date
CN210127163U true CN210127163U (en) 2020-03-06

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN210127163U (en)

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