Halotolerant bacteria generator and subsurface flow constructed wetland

Abstract

The utility model relates to a halotolerant bacteria generator, a hard tube is filled with halotolerant bacteria and halotolerant bacteria growth factors, the tube wall of the hard tube is provided with a plurality of holes, and the hard tube is sequentially coated with a water-soluble microbiological degradation type membrane and a polyurethane porous material layer from inside to outside. And the polyurethane porous material layer is soaked by a microbial degradation type high-molecular polymer. The utility model discloses a subsurface flow constructed wetland. A halotolerant bacteria generator is arranged in a filler layer. The method has the beneficial effects that a buffer mechanism for the halotolerant bacteria to adapt to the environment is provided, so that the halotolerant bacteria can quickly play a role, and the polyurethane porous material layer soaked by the microbiological degradation type high-molecular polymer provides a growth and attachment space for the halotolerant bacteria on one hand, and continuously provides a carbon source for the halotolerant bacteria in a relatively long time on the other hand, so that the halotolerant bacteria are prevented from being degraded by the microbiological degradation type high-molecular polymer. The system can fully adapt to the environment so as to improve the removal rate of pollutants in the brackish water, and the used materials are low in price, ecological and environment-friendly, free of negative influence on the wetland, efficient, green and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of brackish water pollutant treatment, in particular to a salt-tolerant bacteria generator and a subsurface artificial wetland. Background Art

[0002] In the ecological restoration of saline-alkali water and coastlines in the north, since general microorganisms are not salt-tolerant, there is a low pollutant removal rate. Therefore, it is proposed to use salt-tolerant bacteria to carry out ecological restoration of brackish water to improve its pollutant removal rate. However, since general-purpose salt-tolerant bacteria are not local indigenous bacteria, they cannot play a good role in reducing pollutants in the competition with indigenous bacteria. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a salt-tolerant bacteria generator and a subsurface flow artificial wetland to overcome the deficiencies in the above-mentioned prior art.

[0004] The utility model provides a technical solution to the above-mentioned technical problems as follows: a salt-tolerant bacteria generator comprising: a hard tube, the inside of the hard tube being filled with salt-tolerant bacteria and salt-tolerant bacteria growth factors, a plurality of holes being provided on the tube wall for sewage to enter and for salt-tolerant bacteria to be released, the outside of the hard tube being sequentially coated with a water-soluble-microbially degradable membrane and a polyurethane porous material layer from the inside out, the polyurethane porous material layer being soaked in a microbially degradable high molecular polymer.

[0005] The beneficial effects of the utility model are:

[0006] The salt-tolerant bacteria generator will not start before it comes into contact with water;

[0007] When sewage flows through the salt-tolerant bacteria generator, the sewage first passes through the polyurethane porous material layer and then flows through the water-soluble-microbial degradable membrane. The water-soluble high molecular weight polymer in the water-soluble-microbial degradable membrane will slowly dissolve under the action of the sewage, so that the water-soluble-microbial degradable membrane will slowly transform into a porous membrane. The sewage can then pass through the pores of the water-soluble-microbial degradable membrane and the holes on the hard pipe in turn to enter the interior of the hard pipe and come into contact with the salt-tolerant bacteria. Then, the salt-tolerant bacteria growth factor will quickly start the salt-tolerant bacteria. Some salt-tolerant bacteria and salt-tolerant bacteria growth factors can be released from the holes on the hard pipe and the pores of the damaged water-soluble-microbial degradable membrane in turn and enter the polyurethane porous material layer to play a role in reducing pollutants. As the microbial degradable high molecular weight polymer in the water-soluble-microbial degradable membrane is also slowly degraded, more and more salt-tolerant bacteria and salt-tolerant bacteria growth factors will be released and enter the polyurethane porous material layer to accelerate the pollutant reduction effect.

[0008] The salt-tolerant bacteria generator provides a buffer mechanism for salt-tolerant bacteria to adapt to the environment so that the salt-tolerant bacteria can quickly take effect. The polyurethane porous material layer soaked in microbially degradable polymers provides a growth and attachment space for the salt-tolerant bacteria on the one hand, and on the other hand, provides a continuous carbon source for the salt-tolerant bacteria over a long period of time (3-6 months), so that the salt-tolerant bacteria can fully adapt to the environment and improve the removal rate of pollutants in brackish water. The materials used are low-priced and environmentally friendly and will not have a negative impact on wetlands. It is an efficient, green, environmentally friendly and feasible microbial generator.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the growth factor of salt-tolerant bacteria is one or more of vitamins, growth hormones, and nucleotides.

[0011] Furthermore, the diameter of the holes opened on the wall of the hard tube is 30nm to 60nm.

[0012] The above further beneficial effect is that the pore size within this range is conducive to the entry of sewage and the release of salt-tolerant bacteria, while preventing bacterial flocs or other particulate matter from entering to avoid contaminating the internal salt-tolerant bacteria growth environment.

[0013] Furthermore, the water-soluble-microbial degradable membrane is made of PVA water-soluble high molecular polymer and PBAT microbial degradable high molecular polymer.

[0014] Furthermore, the ratio of the PVA water-soluble polymer to the PBAT microbial degradable polymer is 1:10 to 1:20.

[0015] The above method has the further beneficial effect of achieving both the rapid start-up of the salt-tolerant bacteria generator and the slow release of the salt-tolerant bacteria.

[0016] Furthermore, the microbially degradable polymer is one or more of PLA, PCL, and PBAT.

[0017] Based on the above technical solution, the present invention further provides a subsurface flow artificial wetland, comprising: a salt-tolerant bacteria generator, which is arranged in a packing layer.

[0018] The above further beneficial effects are: artificial wetlands are used as an eco-friendly sewage treatment process, and salt-tolerant bacteria generators are placed in subsurface artificial wetlands. By enriching salt-tolerant bacteria, the removal rate of pollutants in subsurface artificial wetlands is improved. In addition, a good buffering mechanism can be provided for salt-tolerant bacteria to fully adapt to the subsurface artificial wetland environment, so that salt-tolerant bacteria can efficiently reduce pollutants in brackish water, thereby improving the removal rate of pollutants in brackish water.

[0019] Furthermore, the salt-tolerant bacteria generator is arranged vertically in the packing layer.

[0020] The above method has the further beneficial effect of making the filler layer where the salt-tolerant bacteria can exert their effects thicker and having a wider range of effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the salt-tolerant bacteria generator in the present utility model;

[0022] Figure 2 This is a structural diagram of the subsurface flow artificial wetland in this utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Salt-tolerant bacteria generator, 110. Hard pipe, 111. Holes, 120. Salt-tolerant bacteria, 130. Salt-tolerant bacteria growth factor, 140. Water-soluble-microbially degradable membrane, 150. Polyurethane porous material layer, 2. Subsurface flow artificial wetland, 210. Filling layer. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] Example 1

[0027] like Figure 1 As shown, a salt-tolerant bacteria generator includes: a rigid tube 110, the rigid tube 110 being filled with salt-tolerant bacteria 120. Furthermore, the rigid tube 110 is also filled with a salt-tolerant bacteria growth factor 130. The salt-tolerant bacteria growth factor 130 can promote the salt-tolerant bacteria 120 to quickly adapt to the environment and initiate pollutant reduction, i.e., it provides a good factor for the salt-tolerant bacteria 120 to initiate growth. A plurality of holes 111 are provided on the wall of the rigid tube 110 for sewage to enter and for the salt-tolerant bacteria 120 to be released.

[0028] The rigid tube 110 is coated with a water-soluble and microbially degradable membrane 140. The water-soluble high molecular polymer in the water-soluble and microbially degradable membrane 140 can slowly dissolve in water, thereby forming pores on the surface of the water-soluble and microbially degradable membrane 140. At the same time, the microbially degradable high molecular polymer in the water-soluble and microbially degradable membrane 140 can also be slowly degraded, similarly forming pores on the surface of the water-soluble and microbially degradable membrane 140. That is, the water-soluble and microbially degradable membrane 140 has both the effects of rapid startup and slow release of salt-tolerant bacteria. The water-soluble and microbially degradable membrane 140 is further coated with a polyurethane porous material layer 150. The polyurethane porous material has good biocompatibility and a large specific surface area, which is conducive to the growth and reproduction of salt-tolerant bacteria.

[0029] The polyurethane porous material layer 150, which has been soaked in a microbially degradable polymer, increases its biocompatibility, providing a growth and attachment space for the salt-tolerant bacteria 120. Furthermore, it can continuously provide a carbon source for the salt-tolerant bacteria 120 over a long period of time (3-6 months), i.e., it has a good slow-release effect, allowing the salt-tolerant bacteria 120 to fully adapt to the environment.

[0030] Before the salt-tolerant bacteria generator does not contact water, the salt-tolerant bacteria generator 1 is not started;

[0031] When sewage flows through the salt-tolerant bacteria generator 1, the sewage first passes through the polyurethane porous material layer 150, and then flows through the water-soluble-microbial degradable membrane 140. The water-soluble high molecular polymer in the water-soluble-microbial degradable membrane 140 will slowly dissolve under the action of sewage, so that the water-soluble-microbial degradable membrane 140 will slowly transform into a porous membrane. The sewage can then pass through the pores of the water-soluble-microbial degradable membrane 140 and the holes 111 on the hard tube 110 in turn to enter the interior of the hard tube 110 and contact with the salt-tolerant bacteria 120, and then the salt-tolerant bacteria growth factor 130 makes the sewage grow. The salt-tolerant bacteria 120 start up quickly, and some of the salt-tolerant bacteria 120 and the salt-tolerant bacteria growth factor 130 can be released from the holes 111 on the hard tube 110 and the pores of the damaged water-soluble-microbial degradable membrane 140 in turn, and enter the polyurethane porous material layer 150 to play a role in reducing pollutants. As the microbially degradable high molecular polymer in the water-soluble-microbial degradable membrane 140 is also slowly degraded, more and more salt-tolerant bacteria 120 and the salt-tolerant bacteria growth factor 130 will be released and enter the polyurethane porous material layer 150 to accelerate the pollutant reduction effect.

[0032] Example 2

[0033] like Figure 1 As shown, this embodiment is a further improvement on the basis of embodiment 1, specifically as follows:

[0034] The halotolerant bacteria growth factor 130 is preferably one or more of vitamins, growth hormones, and nucleotides.

[0035] Example 3

[0036] like Figure 1 As shown, this embodiment is a further improvement on the basis of embodiment 1 or 2, specifically as follows:

[0037] The pores 111 opened on the wall of the hard tube 110 have a pore size of 30nm to 60nm. The pore size within this range is conducive to the entry of sewage and the release of salt-tolerant bacteria 120, while preventing bacterial flocs or other particulate matter from entering to avoid contaminating the internal growth environment of the salt-tolerant bacteria 120.

[0038] Example 4

[0039] like Figure 1 As shown, this embodiment is a further improvement on the basis of any one of the embodiments 1 to 3, and the details are as follows:

[0040] The water-soluble and microbially degradable film 140 is made of a water-soluble polymer PVA (polyvinyl alcohol) and a microbially degradable polymer PBAT (polybutylene terephthalate-adipate). The ratio of the water-soluble and microbially degradable polymer PVA to the microbially degradable polymer PBAT in the water-soluble and microbially degradable film 140 is 1:10 to 1:20.

[0041] Example 5

[0042] like Figure 1 As shown, this embodiment is a further improvement on the basis of any one of the embodiments 1 to 4, specifically as follows:

[0043] The microbially degradable high molecular polymer is preferably one or more of PLA (polylactic acid), PCL (polycaprolactone), and PBAT (polybutylene terephthalate-adipate).

[0044] Example 6

[0045] like Figure 2 As shown, a subsurface flow artificial wetland includes a salt-tolerant bacteria generator 1 as described in any one of Examples 1 to 5. The salt-tolerant bacteria generator 1 is arranged in the filler layer 210. The subsurface flow artificial wetland 2 can be a downward subsurface flow artificial wetland or an upward subsurface flow artificial wetland. The figure shown in this embodiment is a downward subsurface flow artificial wetland.

[0046] Example 7

[0047] like Figure 2 As shown, this embodiment is a further improvement on the basis of Example 6, specifically as follows:

[0048] The salt-tolerant bacteria generator 1 is arranged vertically in the packing layer 210 , so that the packing layer 210 where the salt-tolerant bacteria 120 can function is thicker and has a wider range of function.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A salt-tolerant bacteria generator, characterized in that: include: A hard pipe (110) is provided, wherein the hard pipe (110) is filled with salt-tolerant bacteria (120) and a salt-tolerant bacteria growth factor (130), and a plurality of holes (111) are provided on the wall of the hard pipe (110) for sewage to enter and for the salt-tolerant bacteria (120) to be released. The hard pipe (110) is sequentially coated with a water-soluble-microbially degradable membrane (140) and a polyurethane porous material layer (150) from the inside to the outside, wherein the polyurethane porous material layer (150) is soaked in a microbially degradable polymer; the water-soluble-microbially degradable membrane (140) is made of a PVA water-soluble polymer and a PBAT microbially degradable polymer.

2. A salt-tolerant bacteria generator according to claim 1, characterized in that: The salt-tolerant bacteria growth factor (130) is one or more of vitamins, growth hormones, and nucleotides.

3. The salt-tolerant bacteria generator according to claim 1, characterized in that: The pores (111) opened on the wall of the hard tube (110) have a diameter of 30 nm to 60 nm.

4. The salt-tolerant bacteria generator according to claim 1, characterized in that: The microbially degradable high molecular polymer is one or more of PLA, PCL, and PBAT.

5. A subsurface flow artificial wetland, characterized in that: It comprises the salt-tolerant bacteria generator (1) according to any one of claims 1 to 4, wherein the salt-tolerant bacteria generator (1) is arranged in a packing layer (210).

6. A subsurface flow artificial wetland according to claim 5, characterized in that: The salt-tolerant bacteria generator (1) is vertically arranged in the packing layer (210).

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