Environment coupling type grey biological membrane rural grey water recycling and resourceful treatment device

Abstract

The invention discloses an environment coupling type grey biological membrane rural grey water recycling and resourceful treatment device, which belongs to the technical field of rural sewage treatment, and comprises a grey integrated structure, an efficient biofilm culturing structure and a biological membrane stabilizing structure, the gray integrated structure comprises a gray shell, the interior of the gray shell is divided into an anoxic zone, an aerobic zone and a settling zone through gray partition walls, and a flow guide groove is formed in the top of each gray partition wall; the efficient biofilm culturing structure is arranged in the aerobic zone through a biofilm stabilizing structure, and a gray microporous aeration device is arranged in the aerobic zone; the efficient biofilm formation structure comprises a plurality of Fe3O4-loaded gray PP fiber fillers; the biological membrane stabilizing structure comprises a gray filler frame, and each gray PP fiber filler is fixed on the gray filler frame. The invention solves the problems of low treatment efficiency, high cost, unstable biological membrane, algae growth and the like in the prior art, and realizes efficient purification treatment of grey water in rural domestic sewage.

Description

Technical Field

[0001] The present invention belongs to the technical field of rural sewage treatment, and specifically relates to an environmentally coupled gray biofilm rural gray water reuse and resource treatment device, which is used for the efficient purification treatment of gray water in rural domestic sewage. Background Art

[0002] Current rural wastewater treatment faces numerous critical challenges: 1. Inefficient gray-black mixed treatment: Traditional rural wastewater treatment processes typically combine graywater (such as laundry, bathing, and kitchen wastewater, with relatively low pollutant concentrations (SS ≤ 200 mg / L)) with blackwater (toilet fecal wastewater, with high pollutant concentrations (SS ≥ 500 mg / L). This mixing leads to large fluctuations in wastewater pollutant concentrations and excessively high overall loads, significantly inhibiting biofilm activity. Actual operational data shows that using traditional mixed treatment processes often results in COD removal rates below 70% and ammonia nitrogen removal rates below 60%, making them difficult to meet increasingly stringent wastewater discharge standards and rural water environment management needs. 2. Material defects restrict membrane stability: To reduce costs, some rural wastewater treatment facilities use recycled plastics as treatment equipment. However, recycled plastics often contain hazardous substances such as heavy metals (e.g., lead content ≤ 0.1 mg / kg) and plasticizers (e.g., phthalates ≤ 1 mg / kg). The release of these substances will have a serious negative impact on microbial activity, causing the activity to drop by more than 30%, which in turn significantly prolongs the biofilm formation cycle, usually to more than 15 days, increasing the difficulty of starting and stabilizing the operation of sewage treatment facilities. 3. The biofilm has poor stability and poor treatment effect. Existing biofilm materials generally use ordinary PP fiber fillers and filler fixing devices, which have poor adhesion stability to the biofilm and cannot meet the requirements of efficient adsorption, microbial friendliness and long-term stability. 4. Since some structures of rural sewage treatment devices are open-air, during use, algae growth caused by sunlight causes a decrease in sewage treatment efficiency, which needs to be solved. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned technology and provide an environmentally coupled gray biofilm rural gray water reuse and resource treatment device to solve the problems of low treatment efficiency, high cost, unstable biofilm and algae growth in the existing technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: An environmentally coupled grey biofilm rural greywater reuse and resource treatment device is characterized in that it comprises a grey integrated structure, an efficient biofilm structure and a biofilm stabilizing structure; the grey integrated structure comprises a grey shell, the interior of the grey shell is divided into an anoxic zone, an aerobic zone and a sedimentation zone by grey partition walls, and a guide groove is provided on the top of each grey partition wall; the efficient biofilm structure is arranged in the aerobic zone through a biofilm stabilizing structure, and a grey microporous aeration device is provided in the aerobic zone; the efficient biofilm structure comprises a number of grey PP fiber fillers loaded with Fe3O4; the biofilm stabilizing structure comprises a grey filler frame, and each grey PP fiber filler is fixed on the grey filler frame; the grey integrated structure, the efficient biofilm structure and the biofilm stabilizing structure integrate the triple mechanisms of physical adsorption, biological reaction and chemical and physical reaction and deeply couple them to cultivate a specially domesticated grey film biological community and construct an efficient grey film treatment system.

[0005] A further improvement of the present invention is that a water inlet pipe is provided at the top of the anoxic zone, and the water inlet pipe extends to the bottom of the anoxic zone; a water outlet pipe is provided at the top of the sedimentation zone, and the water inlet pipe is connected to a gray water pipe collection assembly, and the gray water pipe collection assembly is used to collect water from the laundry drain, bath drain, and kitchen drain of rural households. Through the gray-black water separation design, the gray water is directed into the anoxic zone, and the water outlet pipe is connected to a reuse pipe assembly, and the reuse pipe assembly is used to reuse the treated clean water for toilet flushing, laundry water, plant watering, etc. Among the gray water collected by the above-mentioned gray water pipe collection assembly, the gray water generated by the laundry drain is rich in surfactants and fabric fiber debris, the gray water generated by the bath drain contains skin metabolites and shower gel residues, and the gray water generated by the kitchen drain contains grease and food residues. The above-mentioned gray water has synergistic treatment characteristics in terms of composition and does not contain highly polluted toilet black water, which is convenient for subsequent unified treatment. The clean water discharged by the above-mentioned reuse pipe assembly is reused through toilet flushing, laundry water, plant watering, etc.

[0006] A further improvement of the present invention is that the gray partition wall is an integrated injection-molded partition wall.

[0007] A further improvement of the present invention is that the diameter of the gray PP fiber filler is 0.1-0.3 mm, the fiber contact angle is ≤25°, the specific surface area is ≥800 m² / m³, and the Fe3O4 content is ≥20%, thereby achieving rapid formation of the gray film.

[0008] A further improvement of the present invention is that the parameters of the gray microporous aeration device are set to a pore diameter of 0.1-0.3 mm and a bubble rising speed of ≤0.3 m / s to avoid biofilm scouring.

[0009] A further improvement of the present invention is that the gray shell is formed by an upper shell and a lower shell connected by a flange, and an upward extending annular boss is formed at the flange edge of the lower shell, so that it can adapt to different installation environments and ensure long-term stable operation.

[0010] A further improvement of the present invention is that the thickness of the gray shell is ≥8 mm, the height ratio of the upper shell to the lower shell is less than 3:7, and the height of the annular boss is 50 mm.

[0011] A further improvement of the present invention is that the gray shell and internal components of the gray integrated structure are all made of new, non-recycled materials.

[0012] The beneficial effects of the present invention are: 1. The use of separate gray water treatment can avoid the load of mixed black and gray water treatment, and can efficiently remove pollutants such as COD, ammonia nitrogen, and total phosphorus in sewage. The treatment effect is significantly better than that of traditional treatment systems.

[0013] 2. All components of the gray integrated structure are made of gray material. On the one hand, compared with light-colored materials, it can block light, inhibit algae photosynthesis, and prevent algae from gathering and growing on the surface of the water body. On the other hand, compared with black materials, it can prevent excessive heat absorption from causing excessive temperature, maintain water temperature stability, ensure a good microbial reproduction environment, and ensure sewage treatment effect and efficiency.

[0014] 3. All components of this device are made of non-recycled new materials to avoid the use of recycled plastics and to prevent the heavy metals and plasticizers in recycled plastics from having a serious negative impact on microbial activity.

[0015] 4. The gray PP fiber filler loaded with Fe3O4 has better microbial attachment and pollutant removal efficiency than conventional PP fiber fillers, and can effectively meet the requirements of efficient adsorption, microbial friendliness and long-term stability.

[0016] 5. The present invention constructs a flow pattern of overall multi-circulation and local vortex small circulation through the coordinated design of gray partition walls, gray filler racks and gray shells, which extends the residence time of sewage between fillers by 30%-50%, improves the mass transfer coefficient by more than 20%, and achieves efficient biodegradation of pollutants by optimizing the flow pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] In the figure: gray shell 1, gray partition wall 2, anoxic zone 3, aerobic zone 4, sedimentation zone 5, guide trough 6, gray microporous aeration device 7, gray PP fiber filler 8, gray filler rack 9, water inlet pipe 10, water outlet pipe 11, upper shell 12, lower shell 13, annular boss 14. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: like Figure 1 As shown, an environmentally coupled grey biofilm rural greywater reuse and resource treatment device comprises a grey integrated structure, an efficient biofilm structure and a biofilm stabilizing structure; the grey integrated structure comprises a grey shell 1, which is divided into an anoxic zone 3, an aerobic zone 4 and a sedimentation zone 5 by grey partition walls 2, and a guide groove 6 is provided on the top of each grey partition wall 2; the efficient biofilm structure is arranged in the aerobic zone 4 through the biofilm stabilizing structure, and a grey microporous aeration device 7 is provided in the aerobic zone 4; the efficient biofilm structure comprises a number of grey PP fiber fillers 8 loaded with Fe3O4; the biofilm stabilizing structure comprises a grey filler frame 9, and each grey PP fiber filler 8 is fixed on the grey filler frame 9; the grey integrated structure, the efficient biofilm structure and the biofilm stabilizing structure cultivate a specially domesticated grey film biological community by integrating the triple mechanisms of physical adsorption, biological reaction and chemical-physical reaction and deeply coupling them, thereby constructing an efficient grey film treatment system.

[0020] In this embodiment, a water inlet pipe 10 is provided at the top of the anoxic zone 3, and the water inlet pipe 10 extends to the bottom of the anoxic zone 3. A water outlet pipe 11 is provided at the top of the sedimentation zone 5. The water inlet pipe 10 is connected to a gray water pipe collection assembly. The gray water pipe collection assembly is used to collect water from the laundry drain, bathing drain, and kitchen drain of rural households. Through the gray-black water separation design, the gray water is directed into the anoxic zone 3. The water outlet pipe 11 is connected to a reuse pipe assembly. The reuse pipe assembly is used to reuse the treated clean water for toilet flushing, laundry water, plant watering, etc. Among the gray water collected by the above-mentioned gray water pipe collection assembly, the gray water generated by the laundry drain is rich in surfactants and fabric fiber debris, the gray water generated by the bathing drain contains skin metabolites and shower gel residues, and the gray water generated by the kitchen drain contains grease and food residues. The above-mentioned gray water has synergistic treatment characteristics in terms of composition and does not contain highly polluted toilet black water, which is convenient for subsequent unified treatment. The clean water discharged by the above-mentioned reuse pipe assembly is reused through toilet flushing, laundry water, plant watering, etc.

[0021] In this embodiment, the gray partition wall 2 is an integrated injection-molded partition wall.

[0022] In this embodiment, the diameter of the gray PP fiber filler 8 is 0.1-0.3 mm, the fiber contact angle is ≤25°, the specific surface area is ≥800 m² / m³, and the Fe3O4 content is ≥20%, so as to achieve rapid formation of the gray film.

[0023] In this embodiment, the parameters of the gray microporous aeration device 7 are set to a pore diameter of 0.1-0.3 mm and a bubble rising speed of ≤0.3 m / s to avoid biofilm scouring.

[0024] In this embodiment, the gray shell 1 is composed of an upper shell 12 and a lower shell 13 connected by a flange, and an upward extending annular boss 14 is formed at the flange edge of the lower shell 13, so that it can adapt to different installation environments and ensure long-term stable operation.

[0025] In this embodiment, the thickness of the gray shell 1 is ≥8 mm, the height ratio of the upper shell 12 to the lower shell 13 is less than 3:7, and the height of the annular boss 14 is 50 mm.

[0026] In this embodiment, the gray housing 1 of the gray integrated structure and the internal components are all made of new, non-recycled materials.

[0027] Further description of the present invention: 1. Production of gray integrated structure: The gray, integrated structure of the gray shell 1 is made of brand-new gray PP material, with the lower body accounting for 75% of the total. Its rational dimensions ensure effective wastewater treatment and retention time within the device. During the manufacturing process, the height of the annular boss 14 at the junction of the upper and lower trough bodies is strictly controlled to 50mm, ensuring a groundwater permeability coefficient of ≤0.001mm / h. The shell thickness is 8mm, ensuring a resistance to soil lateral pressure of ≥0.1MPa. After completion, the trough body is mechanically sealed to ensure its tightness and stability.

[0028] The gray integrated structure's gray shell 1, gray filler frame 9, gray partition wall 2, and gray PP fiber filler 8 are all made of a brand-new gray PP material, enhanced with 5% food-grade iron oxide pigment (particle size ≤ 1μm). This material possesses unique optical properties, with an absorbance of 60-70% and a UV reflectivity of ≤10%. It effectively inhibits algae growth, reducing algae biomass to ≤10³ cells / mL, preventing excessive algae growth from negatively impacting wastewater treatment efficiency. It also ensures the material is safe and non-toxic, meeting environmental requirements.

[0029] 2. Sewage treatment process: The collected greywater enters the anoxic zone 3, where the inlet velocity is controlled to ≤0.1m / s and the contact time between the wastewater and the filler is ≥30min. In the anoxic zone 3, the greywater undergoes a reaction that decomposes macromolecular organic matter into micromolecular organic matter, creating conditions for subsequent treatment.

[0030] The gray water treated in the anoxic zone 3 enters the aerobic zone 4, and on the surface of the gray PP fiber filler 8 loaded with Fe3O4, the pollutants such as COD, ammonia nitrogen, and total phosphorus are efficiently removed through the coupling effect of adsorption-biological-solidification. During operation, the dissolved oxygen concentration in aerobic zone 4 is monitored in real time using an online DO monitoring device. This is linked to the gray microporous aeration device 7, maintaining an aeration intensity of 0.8 m³ / h and automatically controlling the DO concentration between 2 and 3 mg / L. This provides a suitable living environment for microorganisms and ensures effective wastewater treatment. The membrane growth rate is controlled at 0.1 to 0.3 mm / day. Once the membrane reaches a certain thickness, the backwash cycle is determined based on operational conditions, ensuring a 90-day backwash cycle to maintain stable and efficient operation of the septic tank.

[0031] 3. Actual application: Grey water inlet: COD 280 mg / L, ammonia nitrogen 28 mg / L, total phosphorus 4.5 mg / L, representing the typical water quality of rural domestic grey water.

[0032] Outlet: COD 22mg / L, ammonia nitrogen 2.1mg / L, total phosphorus 0.6mg / L. All indicators meet the GB 18918-2002 Level A standard, indicating that this system can efficiently purify rural domestic gray water.

[0033] Membrane formation cycle: 15 days, which is significantly shorter than traditional processes. The rapidly formed gray membrane can quickly play a role in sewage treatment.

[0034] Stable operation: During the 12-month stable operation, the membrane thickness was maintained at 2.5±0.3mm, and the backwash cycle was extended to 12 months, which demonstrated the stability and reliability of the system and reduced maintenance costs and frequency.

[0035] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An environmentally coupled grey biofilm rural greywater reuse and resource treatment device, characterized in that: It includes a gray integrated structure, an efficient biofilm structure and a biofilm stabilization structure; the gray integrated structure includes a gray shell, and the gray shell is divided into an anoxic zone, an aerobic zone and a sedimentation zone by gray partition walls, and the top of each gray partition wall is provided with a guide groove; the efficient biofilm structure is arranged in the aerobic zone through the biofilm stabilization structure, and a gray microporous aeration device is provided in the aerobic zone; the efficient biofilm structure includes a number of gray PP fiber fillers loaded with Fe3O4; the biofilm stabilization structure includes a gray filler frame, and each gray PP fiber filler is fixed on the gray filler frame; the gray integrated structure, the efficient biofilm structure and the biofilm stabilization structure integrate the triple mechanisms of physical adsorption, biological reaction and chemical and physical reaction and deeply couple them to cultivate a specially domesticated gray film biological community and construct an efficient gray film treatment system.

2. The environmentally coupled gray biofilm rural gray water reuse and resource treatment device according to claim 1 is characterized in that: A water inlet pipe is provided at the top of the anoxic zone, and the water inlet pipe extends to the bottom of the anoxic zone. A water outlet pipe is provided at the top of the sedimentation zone, and the water inlet pipe is connected to a gray water pipe collection assembly. The gray water pipe collection assembly is used to collect water from the laundry drain, bathing drain, and kitchen drain of rural households. Through the gray-black water separation design, the gray water is directed to flow into the anoxic zone. The water outlet pipe is connected to a reuse pipe assembly, and the reuse pipe assembly is used to reuse the treated clean water for toilet flushing, laundry water, plant watering, etc.

3. The environmentally coupled gray biofilm rural gray water reuse and resource treatment device according to claim 1 is characterized in that: The grey partition wall is an integrated injection-molded partition wall.

4. The environmentally coupled gray biofilm rural gray water reuse and resource treatment device according to claim 1 is characterized in that: The gray PP fiber filler has a diameter of 0.1-0.3 mm, a fiber contact angle of ≤25°, a specific surface area of ​​≥800 m² / m³, and a Fe3O4 content of ≥20%.

5. The environmentally coupled gray biofilm rural gray water reuse and resource treatment device according to claim 1 is characterized in that: The parameters of the gray microporous aeration device are set to a pore diameter of 0.1-0.3 mm and a bubble rising speed of ≤0.3 m / s.

6. The environmentally coupled grey biofilm rural greywater reuse and resource treatment device according to claim 1 is characterized in that: The gray shell is formed by an upper shell and a lower shell connected by a flange, and an upwardly extending annular boss is formed at the flange edge of the lower shell.

7. The environmentally coupled grey biofilm rural greywater reuse and resource treatment device according to claim 1 is characterized in that: The thickness of the gray shell is ≥8 mm, the height ratio of the upper shell to the lower shell is less than 3:7, and the height of the annular boss is 50 mm.

8. The environmentally coupled grey biofilm rural greywater reuse and resource treatment device according to claim 1 is characterized in that: The gray shell and internal components of the gray integrated structure are all made of new, non-recycled materials.

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