CN101575146B - Self-anchored submerged ecological filter bed and method for in-situ purification of slightly polluted surface water - Google Patents

Abstract

The invention discloses a self-anchored immersed ecological filter bed and a method thereof for purifying micro-polluted surface water in situ, wherein the filter bed comprises a three-dimensional rectangle framework, parallel ropes (nylon cords or ropes of other materials), contact oxidation fillers and biomembranes; the plurality of parallel ropes are correspondingly arranged on the upper surface and the lower surface of the three-dimensional rectangle framework; the contact oxidation fillers are bound among the parallel ropes on the upper surface and the lower surface; the biomembranes are adhered to the surfaces of the contact oxidation fillers; and an anchored heavy things is connected to the bottom of the three-dimensional rectangle framework. The method thereof for purifying water comprises the steps of arranging the filter bed in the water body needing purification, anchoring the anchored heavy things at the bottom of a river (lake) bed, leading the filter bed to be immersed and suspended in the water body, and leading the bottom of the filter bed not to contact the river (lake) bed. The invention has the characteristics of large contact specific surface area, high biomass,quick purification speed, high efficiency, no affection on the sight and the like.

Description

Self-anchored submerged ecological filter bed and method for in-situ purification of slightly polluted surface water

technical field

The invention relates to the technical field of water treatment, in particular to a self-anchored submerged ecological filter bed and a method for purifying slightly polluted surface water in situ.

Background technique

In the prior art, the ecological filter bed utilizes the huge specific surface area of the elastic filler or the combined filler to allow microorganisms to grow on the surface of the filler to form a biofilm, thereby playing the role of biological filtration and biotransformation. It can be used for in-situ enhanced purification of micropolluted and eutrophic surface waters. However, the surface area of the traditional ecological filter bed is not large enough, the implantation of microorganisms and algae is not easy, and it is fixedly installed, which has poor flexibility, affects water navigation, and has poor wind and wave resistance, which makes the effect of purifying water quality unsatisfactory.

Contents of the invention

The purpose of the present invention is to provide a self-anchored submerged ecological filter bed and its in-situ method for purifying micro-polluted surface water in view of the deficiencies in the prior art. High biomass, the method has the characteristics of fast purification speed, high efficiency, resistance to hydraulic load impact, and low investment.

The purpose of the present invention is achieved like this:

A self-anchoring submerged ecological filter bed, which includes a three-dimensional rectangular frame, parallel ropes (nylon ropes or other material ropes), contact oxidation fillers and biofilms, and several parallel ropes are correspondingly arranged on the upper surface of the three-dimensional rectangular frame and On the lower surface, the contact oxidation filler is bound between the upper surface and the parallel rope on the lower surface, and the biofilm is attached to the surface of the contact oxidation filler; the anchor weight is connected to the bottom of the three-dimensional rectangular frame.

The three-dimensional rectangular frame is made of moso bamboo or low-density materials, on which contact oxidation fillers are bound, such as elastic fillers, soft fillers, semi-soft fillers or combined fillers.

The self-anchoring submerged ecological filter bed does not include anchoring weights, and its overall density is lower than that of water, so anchoring weights are needed for anchoring; the weight of anchoring weights is adjusted according to the water flow rate at the work site.

A method for in-situ purification of slightly polluted surface water, the method is to place the above self-anchored submerged ecological filter bed in the water body to be purified, anchor heavy objects to the bottom of the river (lake) bed, and make the bed Submerged and suspended in the water body, the height of the top of the bed body from the water surface is 0.5-1.5m, and the bottom of the ecological filter bed does not touch the bottom of the river (lake) bed.

After the anchor weights are untied, the ecological filter bed without the anchor weights can be easily moved and re-anchored to other water bodies that need to be purified.

The invention has a large specific surface area of the contact oxidation filler support, high biomass, fast purification speed, high efficiency, and resistance to hydraulic load impact; if the dissolved oxygen in the water is high, it can meet the growth requirements of organisms on the contact oxidation filler support, then There is no need for aeration and no power consumption; the contact oxidation filler support filler has a large gap, which is suitable for the hydrodynamic conditions of the river water body, does not affect the water flow velocity, does not affect flood drainage; the construction speed is fast, there is no earthwork, and the investment less; the bed body can be modularized, and can be installed flexibly at the implementation site; after the installation is completed, aquatic animals play a role in removing aging biofilms, basically no post-management is required, and management and maintenance are convenient; the bed body is installed underwater without affecting the landscape. There will be no landscape impact on diversion channels without shipping functions.

Description of drawings

Fig. 1 is the structure schematic diagram of filter bed of the present invention

Fig. 2 is the use state figure of filter bed of the present invention

Detailed ways

Referring to Fig. 1 and Fig. 2, the filter bed of the present invention includes a three-dimensional rectangular frame 5, parallel ropes 2, contact oxidation fillers 6 and biofilm 4, and the parallel ropes 2 are several and correspondingly arranged on the upper surface and the lower surface of the three-dimensional rectangular frame 5. The oxidized packing 6 is bound between the parallel ropes 2 on the upper surface and the lower surface, and the biofilm 4 is attached to the surface contacting the oxidized packing 6; the anchor weight 3 is connected to the bottom of the three-dimensional rectangular frame 5 by rope; the three-dimensional rectangular frame 5 is made of moso bamboo or low-density materials, on which contact oxidation fillers 6 are bound, such as elastic fillers, soft fillers, semi-soft fillers or combined fillers; the low-density materials include: wood, sealed PVC or UPVC pipes, etc. The self-anchoring submerged ecological filter bed does not include the anchor weight 3, and its overall density is lower than that of water, so it needs to be anchored by the anchor weight 3; the weight of the anchor weight 3 is adjusted according to the water flow rate at the work site.

The method for purifying water of the present invention is to place the above-mentioned self-anchor submerged ecological filter bed in the water body that needs to be purified, and the anchor weight 3 is anchored to the bottom of the river (lake) bed 7, so that the bed is submerged and suspended in the water body , the height of the top of the bed from the water surface 8 is 0.5-1.5m, and the bottom of the ecological filter bed does not touch the river (lake) bed 7; after the anchor weight 3 is disconnected, the ecological filter without the anchor weight 3 The bed can be easily moved and re-anchored to other bodies of water that require purification.

The bed body of the present invention is a facility that provides growth conditions for microorganisms, protozoa, small zooplankton, crustaceans, etc. participating in the purification of pollutants. The contact oxidation filler with high specific surface area is set on the bed, so that a large number of microorganisms involved in the purification of pollutants grow on the filler to form a mucus-like biofilm; because the biofilm grows on the filler and does not flow away with the river, the unit volume The number of organisms in the water body increased by several orders of magnitude. When the river water flows through the bed, the organic matter contained in the river water is adsorbed and oxidized by the heterotrophic bacteria on the biofilm on the filler and degraded into carbon dioxide and water; the organic nitrogen in the river water is quickly converted into ammonia nitrogen by the microorganisms in the biofilm, and the ammonia nitrogen is The nitrifying bacteria on the biofilm are oxidized to nitrate nitrogen, and the nitrate nitrogen can be removed through the denitrification and denitrification of the biofilm, which can effectively reduce the total nitrogen in the river water; the phosphorus contained in the river water mainly includes soluble phosphoric acid Phosphorus contained in salt and solid particles can be adsorbed, absorbed and utilized by microorganisms in the biofilm, and the crustaceans and molluscs in the bed can accelerate the growth rate of river water by secreting biological mucus and filtering. Precipitation and removal of suspended solid particles, thereby effectively reducing ammonia nitrogen. The biofilm grown on the filler can be swallowed by protozoa, metazoans, planktonic crustaceans and fish, so that the biofilm can be updated in time. Aquatic animals can also prey on plankton, thus forming a whole food chain (net), and the pollutants in the river water are completely decomposed and transformed.

Claims (5)

1. A self-anchor submerged ecological filter bed is characterized in that the filter bed comprises a three-dimensional rectangular frame (5), parallel ropes (2), contact oxidation filler (6) and biofilm (4), parallel ropes (2) There are several and correspondingly arranged on the upper surface and the lower surface of the three-dimensional rectangular frame (5), the contact oxidation filler (6) is bound between the upper surface and the lower surface parallel ropes (2), and the biofilm (4) is attached to the contact oxidation filler ( 6) The surface; the anchor weight (3) is connected to the bottom of the three-dimensional rectangular frame (5); the overall density of the ecological filter bed excluding the anchor weight (3) is lower than that of water. 2. The ecological filter bed according to claim 1, characterized in that the three-dimensional rectangular frame (5) is made of moso bamboo material, and is bound with contact oxidation filler (6) thereon. 3. The ecological filter bed according to claim 1, characterized in that the three-dimensional rectangular frame (5) is made of a low-density material, on which the contact oxidation filler (6) is bound; its low-density material comprises: wood, sealed PVC or UPVC pipe. 4. A method for in-situ purification of slightly polluted surface water, characterized in that: the self-anchored submerged ecological filter bed according to claim 1 or claim 2 is placed in the water body to be purified, and anchored by heavy objects At the bottom of the river bed or lake bed, the bed is submerged and suspended in the water body, the height of the top of the bed body from the water surface is 0.5-1.5m, and the bottom of the ecological filter bed does not touch the river bed or lake bed. 5. The method according to claim 4, characterized in that after the anchoring weight is disconnected, the bed body can move freely and can be re-anchored to other water bodies that need to be purified.

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