Multistage filler sewage filtering device

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a multi-stage filler sewage filtering device, which comprises a multi-stage filler bed, a waterproof impermeable layer, a plant system, a water distribution system and a clean water tank, the multi-stage filler bed, the waterproof impermeable layer, the plant system, the water distribution system and the clean water tank form a filtering device, and pollutants are removed by cooperating with filler adsorption; comprising a multi-stage packed bed, a waterproof impermeable layer, a plant system, a water distribution system and a clean water tank, the multi-stage packed bed, the waterproof impermeable layer, the plant system, the water distribution system and the clean water tank form a filtering device, the multi-stage packed bed physically intercepts and adsorbs SS to remove SS, the waterproof impermeable layer prevents water and sewage from leaking, the plant system releases oxygen to rhizosphere through photosynthesis, and the plant system releases oxygen to the rhizosphere through photosynthesis. And an aerobic-anoxic microenvironment is formed, nitrification / denitrification and secretion driving are promoted, root systems secrete organic acids and enzymes, microbial metabolism and biological enrichment are activated, plants absorb N, P and heavy metals, and pollutants are removed in cooperation with filler adsorption.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment, and in particular to a multi-stage packing sewage filtration device. Background Technology

[0002] Traditional wastewater treatment technologies suffer from high energy consumption, weak resistance to shock loads, and complex operation and maintenance. They are particularly costly when applied to decentralized scenarios. While existing filter bed technologies employ the synergistic purification of packing materials and plants, they suffer from drawbacks such as easy packing material caking, uneven pollutant removal efficiency, and insufficient oxygen supply from plant roots. This invention achieves efficient wastewater purification and ecological self-healing by optimizing the multi-stage packing structure and strengthening the plant-microorganism symbiotic mechanism. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a multi-stage packing wastewater filtration device.

[0004] This utility model discloses a multi-stage packing wastewater filtration device, comprising a multi-stage packing bed, a waterproof and seepage-proof layer, a plant system, a water distribution system, and a clear water tank. The multi-stage packing bed, waterproof and seepage-proof layer, plant system, water distribution system, and clear water tank constitute the filtration device. The multi-stage packing bed physically intercepts and adsorbs suspended solids (SS) for removal. The waterproof and seepage-proof layer prevents wastewater leakage. The plant system releases oxygen to the rhizosphere through photosynthesis, creating an aerobic-anoxic microenvironment that promotes nitrification / denitrification. Driven by secretions, the roots secrete organic acids and enzymes, activating microbial metabolism and bioaccumulation: the plants absorb nitrogen, phosphorus, and heavy metals, synergistically with the packing material. Adsorption removes pollutants; the system comprises a multi-stage packing bed, a waterproof and seepage-proof layer, a plant system, a water distribution system, and a clear water tank. The multi-stage packing bed, waterproof and seepage-proof layer, plant system, water distribution system, and clear water tank constitute a filtration device. The multi-stage packing bed physically traps and adsorbs suspended solids (SS) for removal. The waterproof and seepage-proof layer prevents sewage leakage. The plant system releases oxygen to the rhizosphere through photosynthesis, creating an aerobic-anoxic microenvironment that promotes nitrification / denitrification. Driven by secretions, the roots secrete organic acids and enzymes, activating microbial metabolism and bioaccumulation: plants absorb N, P, and heavy metals, synergistically with the packing adsorption to remove pollutants.

[0005] Preferably, the multi-stage packed bed matrix is ​​composed of volcanic rock, ceramsite, activated carbon, and bio-ceramsite, and is arranged in 3-5 stages in series, with the particle size of the packing material being refined step by step; the multi-stage packed bed matrix is ​​composed of volcanic rock, ceramsite, activated carbon, and bio-ceramsite, and is arranged in 3-5 stages in series, with the particle size of the packing material being refined step by step, thereby improving physical interception and adsorption removal of suspended solids (SS).

[0006] Preferably, the waterproof and seepage-proof layer is an HDPE membrane (thickness ≥ 1.5 mm) or a clay layer; the waterproof and seepage-proof layer is an HDPE membrane (thickness ≥ 1.5 mm) or a clay layer to prevent sewage leakage and pollution of groundwater.

[0007] Preferably, the plant system consists of emergent plants or terrestrial plants with a root depth of 0.5-1.5m; the plant system consists of emergent plants (reeds, cattails, calamus, etc.) or terrestrial plants (foxtail grass, canna lilies) with a root depth of 0.5-1.5m, creating a plant-microorganism symbiotic root system for oxygen supply.

[0008] Preferably, the water distribution system uses a perforated pipe or rotating distributor at the top to evenly distribute wastewater; the perforated pipe or rotating distributor at the top of the water distribution system evenly distributes wastewater (hydraulic load: 0.5-3m). 3 / (m 2 ·d)) improves wastewater distribution efficiency.

[0009] Preferably, the clear water tank is disinfected with sodium hypochlorite and then discharged after meeting the standards; the clear water tank is disinfected with sodium hypochlorite (contact time ≥30min, residual chlorine ≥0.3mg / L) and then discharged after meeting the standards.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: It includes a multi-stage packing bed, a waterproof and seepage-proof layer, a plant system, a water distribution system, and a clear water tank. The multi-stage packing bed, waterproof and seepage-proof layer, plant system, water distribution system, and clear water tank constitute a filtration device. The multi-stage packing bed physically intercepts and adsorbs suspended solids (SS) for removal. The waterproof and seepage-proof layer prevents sewage leakage. The plant system releases oxygen to the rhizosphere through photosynthesis, forming an aerobic-anoxic microenvironment, promoting nitrification / denitrification. Driven by secretions, the roots secrete organic acids and enzymes, activating microbial metabolism and bioaccumulation. The plants absorb N, P, and heavy metals, and together with the packing, adsorb pollutants to achieve removal. Attached Figure Description

[0011] Figure 1 This is a first structural schematic diagram of the present invention;

[0012] Figure 2 This is a second structural schematic diagram of the present invention;

[0013] Figure 3 This is a schematic diagram of the third structure of this utility model;

[0014] Figure 4 It is an enlarged structural diagram of structures such as waterstops and composite geomembranes. Detailed Implementation

[0015] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0016] Example

[0017] like Figures 1 to 4As shown, this utility model discloses a multi-stage packing wastewater filtration device, comprising a multi-stage packing bed, a waterproof and seepage-proof layer, a plant system, a water distribution system, and a clear water tank. The multi-stage packing bed, waterproof and seepage-proof layer, plant system, water distribution system, and clear water tank constitute the filtration device. The multi-stage packing bed physically intercepts and adsorbs suspended solids (SS) for removal. The waterproof and seepage-proof layer prevents wastewater leakage. The plant system releases oxygen to the rhizosphere through photosynthesis, forming an aerobic-anoxic microenvironment that promotes nitrification / denitrification. Driven by secretions, the roots secrete organic acids and enzymes, activating microbial metabolism and bioaccumulation: the plants absorb N, P, and heavy metals, which, together with the adsorption of the packing, achieve pollutant removal.

[0018] The multi-stage packed bed matrix is ​​composed of volcanic rock, ceramsite, activated carbon and bio-ceramsite, and consists of 3-5 stages in series, with the particle size of the packing material being refined step by step;

[0019] The waterproof and seepage-proof layer is an HDPE membrane (thickness ≥ 1.5 mm) or a clay layer;

[0020] The plant system consists of emergent or terrestrial plants with root systems at a depth of 0.5-1.5m;

[0021] The water distribution system uses perforated pipes or rotating distributors at the top to evenly distribute wastewater.

[0022] The water is disinfected with sodium hypochlorite in the clear water tank and then discharged after meeting the standards.

[0023] In this embodiment, the multi-stage packed bed physically traps and adsorbs suspended solids (SS) for removal: the packing pores trap suspended solids (removal rate > 80%), multi-stage filtration prevents clogging, heavy metals are adsorbed, and activated carbon / zeolite packing fixes Cu through ion exchange and surface complexation. 2 +、Pb 2 + etc. (removal rate 50-70%), waterproof and seepage-proof layer to prevent sewage leakage, 2. Plant-microbe symbiotic root oxygen supply: plant photosynthesis releases oxygen to the rhizosphere, forming an aerobic-anoxic microenvironment (root zone DO 1-3mg / L), promoting nitrification / denitrification. Secretion-driven: Roots secrete organic acids and enzymes, activating microbial metabolism (COD / BOD5 removal rate > 85%). Bioaccumulation: Plants absorb N, P, and heavy metals (e.g., cattail's Cd enrichment coefficient > 100), synergistically removing pollutants through adsorption by the packing material. The multi-stage packing bed matrix consists of volcanic rock, ceramsite, activated carbon, and bio-ceramsite, arranged in 3-5 stages in series, progressively refining the packing particle size to improve physical interception and SS removal. The waterproof and seepage-proof layer is an HDPE membrane (thickness ≥ 1.5 mm) or a clay layer to prevent sewage leakage and groundwater pollution. The plant system consists of emergent plants (reeds, cattails, calamus, etc.) or terrestrial plants (foxtail grass, canna lilies), with a root depth of 0.5-1.5 m, creating a plant-microbe symbiotic root system for oxygen supply. The water distribution system uses perforated pipes or rotating distributors at the top to evenly distribute sewage (hydraulic load: 0.5-3 m). 3 / (m 2 •d)) To improve the efficiency of wastewater distribution, the clear water tank is disinfected with sodium hypochlorite (contact time ≥30min, residual chlorine ≥0.3mg / L) before being discharged in compliance with standards.

[0024] The HDPE membrane of the multi-stage filler wastewater filtration device of this utility model is commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-stage packing wastewater filtration device, comprising a multi-stage packing bed, a waterproof and seepage-proof layer, a plant system, a water distribution system, and a clear water tank, characterized in that, The filtration device consists of a multi-stage packing bed, a waterproof and seepage-proof layer, a plant system, a water distribution system, and a clear water tank. The multi-stage packing bed physically intercepts and adsorbs suspended solids (SS) to remove them. The waterproof and seepage-proof layer prevents sewage leakage. The plant system releases oxygen to the rhizosphere through photosynthesis, forming an aerobic-anoxic microenvironment that promotes nitrification / denitrification. Driven by secretions, the roots secrete organic acids and enzymes, activating microbial metabolism and bioaccumulation. The plants absorb N, P, and heavy metals, which, together with the packing, adsorb pollutants to achieve removal.

2. The multi-stage packing wastewater filtration device as described in claim 1, characterized in that, The multi-stage packed bed matrix is ​​composed of volcanic rock, ceramsite, activated carbon and bio-ceramsite, and consists of 3-5 stages in series, with the particle size of the packing material being refined step by step.

3. The multi-stage packing wastewater filtration device as described in claim 2, characterized in that, The waterproof and seepage-proof layer is an HDPE membrane or a clay layer.

4. The multi-stage packing wastewater filtration device as described in claim 3, characterized in that, The plant system consists of emergent or terrestrial plants with root systems at a depth of 0.5-1.5m.

5. A multi-stage packing wastewater filtration device as described in claim 4, characterized in that, The water distribution system uses perforated pipes or rotating distributors at the top to evenly distribute wastewater.

6. The multi-stage packing wastewater filtration device as described in claim 1, characterized in that, The water is disinfected with sodium hypochlorite in the clear water tank and then discharged after meeting the standards.

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