CN111777182A - An oxygen-enriched bioreactor suitable for in-situ remediation of micro-polluted water bodies - Google Patents

Abstract

The invention discloses an oxygen-enriched bioreactor suitable for in-situ remediation of micro-polluted water, which comprises a rectangular frame, an aquatic plant floating island unit fixed at the top of the rectangular frame, an aeration hollow membrane unit and a biological filler unit, wherein the aeration hollow membrane unit and the biological filler unit are fixed in the rectangular frame; wherein, the aeration hollow membrane unit comprises an aeration branch pipe connected with an external aeration pipe; the aeration branch pipes are arranged at the bottom of the aeration hollow membrane unit at equal intervals, each aeration branch pipe is communicated with a plurality of air inlet pipes, each air inlet pipe is correspondingly connected with a hollow membrane, and the hollow membrane is suspended in the rectangular frame through a support; the biological filler unit comprises a plurality of biological fillers hung vertically. The oxygen-enriched bioreactor is suitable for in-situ remediation of micro-polluted water, and the quantity and activity of microorganisms are improved by improving the content of dissolved oxygen in the water, so that the oxidation and nitrification of the microorganisms are enhanced, and the reduction of the concentration of pollutants in the water is facilitated.

Description

An oxygen-enriched bioreactor suitable for in-situ remediation of micro-polluted water bodies

technical field

The invention relates to a reactor, in particular to an oxygen-enriched biological reactor suitable for in-situ restoration of micro-polluted water bodies.

Background technique

Water whose organic matter content and some water quality indicators exceed the Class III standard of "Surface Water Environmental Quality Standard" (GB3838-2002) is generally referred to as slightly polluted water. Advanced treatment technology is a hot spot of research and attention in the field of micro-polluted water treatment. Bioremediation technology is considered to be the most scientific, effective and economical water restoration technology. Bioremediation technology mainly relies on the metabolic activities of microbial groups to remove organic matter in micro-polluted water, mainly including humic acid, ammonia nitrogen and nitrate. The activity and quantity of microorganisms in the existing micro-polluted water treatment devices are not high, so that the ability of microorganisms to effectively remove pollutants is limited.

SUMMARY OF THE INVENTION

Purpose of the invention: The purpose of the present invention is to provide a water treatment device that can effectively improve the activity and quantity of microorganisms.

Technical solution: The oxygen-enriched bioreactor reactor suitable for in-situ remediation of micro-polluted water bodies according to the present invention includes a rectangular frame, an aquatic plant floating island unit fixed on the top of the rectangular frame, and an aeration unit fixed in the rectangular frame The hollow membrane unit and the biological filler unit; wherein, the aeration hollow membrane unit includes an aeration branch pipe connected with an external aeration pipe; the aeration branch pipes are arranged at equal distances at the bottom of the aeration hollow membrane unit, and each aeration branch pipe is connected with a A plurality of air inlet pipes, each air inlet pipe is connected to a hollow membrane correspondingly, and the hollow membrane is suspended in a rectangular frame through a bracket; the biological filler unit includes a plurality of vertically suspended biological fillers.

The aquatic plant floating island unit includes an ecological box fixed on the upper part of the aeration hollow membrane unit and the biological filler unit, the bottom of the ecological box is provided with a plurality of through-hole structures, and the ecological box is laid with a zeolite base layer and a zeolite base layer planted on the zeolite base layer. Aquatic plants, the roots of aquatic plants enter the aeration hollow membrane unit and the biological filler unit through the through-hole structure at the bottom of the ecological box.

Wherein, the vertically suspended hollow membranes in the aeration hollow membrane unit are arranged in a matrix.

Wherein, the two sides of the rectangular frame are symmetrically provided with buoy structures.

Wherein, the intake end of the aeration pipe is connected with the blower, and the aeration pipe is provided with an intake valve.

Beneficial effects: Compared with the prior art, the significant effects of the reactor of the present invention are: 1. The reactor achieves good water buoyancy by installing buoys on both sides of the rectangular frame, which can fluctuate up and down with the water level; 2. The use of hollow membrane The pulse aeration method is easy to generate tiny air bubbles, which can provide more sufficient oxygen to the water body, and has the advantage of high oxygen mass transfer rate. 3. The combination of plant roots extending into the biological filler unit and fillers with large specific surface area provides favorable conditions for the growth of microorganisms; 4. The reactor utilizes the characteristics of high oxygen utilization rate of hollow membrane aeration, builds aeration hollow membrane unit to form an aerobic environment, combines with biological filler unit to form anoxic environment, arranges the two units in combination, and combines artificial floating island ecological technology at the same time , effectively improve the number and activity of microorganisms, thereby strengthening the oxidation and nitrification of microorganisms, which is beneficial to the reduction of the concentration of pollutants (organic matter, nitrogen pollution) in the water body, thereby improving the system's treatment effect on pollutants in the water body.

Description of drawings

Fig. 1 is the structural representation of the reactor of the present invention;

Fig. 2 is the aeration principle diagram of aeration hollow membrane unit;

Figure 3 is a top view of the connection between the aeration pipe and the aeration branch pipe.

Detailed ways

The technical solutions of the present invention will be further described below with reference to the accompanying drawings.

As shown in Figures 1-3, the present invention is suitable for an oxygen-enriched bioreactor reactor for in-situ restoration of micro-polluted water bodies. The outside of the reactor is a stainless steel tube rectangular frame structure. The reactor is directly installed in the micro-polluted water body, and float The island floating technology (buoys 2 are installed on both sides of the rectangular frame 1) enables the entire reactor to fluctuate up and down with the water level, without affecting the flooding of the river. In addition, the shape of the reactor frame is designed like a bridge pier, thereby reducing the hydraulic pressure of the device on the river. effects of flow. In the reactor, the aeration hollow membrane unit 4 and the biological filler unit 5 are arranged left and right along the water flow direction, and there are two aquatic plant floating island units 3, which are respectively arranged on the upper part of the aeration hollow membrane unit 4 and the biological filler unit 5. The aeration hollow membrane unit 4 is connected to the aeration pipe 11: one end of the aeration pipe 11 is connected to the aeration branch pipe 13, the other end of the aeration pipe 11 is connected to the external blower 12, and the aeration pipe 11 is provided with an intake valve 15; The branch pipes 13 are evenly arranged at the bottom of the aeration hollow membrane unit 4 at equal distances, each aeration branch pipe 13 is connected with a plurality of air intake pipes 14, and each air intake pipe 14 is connected to a hollow membrane 9 correspondingly, that is, the aeration branch pipe 13 and the Each hollow membrane 9 is connected through the air inlet pipe 14 respectively. The main function of the hollow membrane 9 in the aeration hollow membrane unit 4 is to provide a channel for aeration and provide sufficient oxygen to the water body. The aeration method adopts pulse aeration. Aeration from bottom to top, passing through the inner cavity of the hollow membrane (aeration from bottom to top through the hollow membrane 9 as a channel), this aeration method has the advantage of high oxygen mass transfer rate. The hollow membrane 9 is vertically suspended on the support 16 in the aeration hollow membrane unit 4, the hollow membrane 9 is a hydrophobic microporous hollow fiber membrane, and the aeration hollow membrane unit 4 is constructed to be suitable for the growth of nitrite bacteria and nitrate bacteria. Oxygen environment, thereby converting ammonia nitrogen in the water body into nitrate nitrogen. The aeration hollow membrane unit 4 uses air to enter in the membrane filaments, and the oxygen utilization efficiency of aeration is greatly improved, which can reach more than 6kgO ₂ /kW·h.

The aquatic plant floating island unit 3 includes an aquatic plant planting area 6 and a zeolite base layer 7, the ecological box 8 of each aquatic plant floating island unit 3 is respectively fixed on the upper part of the aeration hollow membrane unit 4 and the biological filler unit 5, and the bottom of the ecological box 8 There are a plurality of through-hole structures. As the plants grow, the roots of the plants enter the aeration hollow membrane unit 4 and the biological filler unit 5 through the through-hole structure at the bottom of the box. The aeration hollow membrane unit 4 and the biological filler unit 5 use The roots of aquatic plants form a micro-ecosystem in the system. As a biological carrier, the roots of aquatic plants can form a huge ecological film, and the microorganisms, protozoa and micro-animals attached to the ecological film can be used to remove various pollutants in sewage . The plants planted in aquatic plant planting area 6 are plants with strong purification ability, developed root system, lush stems and leaves, strong economy and high ornamental value, mainly emergent plants, such as cress, watercress, cattail and reed.

The biological filler is vertically suspended in the biological filler unit 5, and the biological filler adopts a fiber filler with a large specific surface area. The biological filler unit 5 does not perform aeration, thereby constructing an anoxic environment suitable for the growth of denitrifying bacteria, and reducing nitrate and nitrite to gaseous nitrogen and nitrogen. On the one hand, the reactor of the present invention utilizes the root system of aquatic plants to facilitate the growth and attachment of microorganisms in the system, and on the other hand, uses a filler with a large specific surface area in the biological filler unit to improve the film forming effect, thereby synergistically providing more favorable conditions for the growth of microorganisms.

Claims (5)

1. An oxygen-enriched bioreactor suitable for in-situ remediation of micro-polluted water is characterized in that: the device comprises a rectangular frame, an aquatic plant floating island unit fixed at the top of the rectangular frame, an aeration hollow membrane unit and a biological filler unit fixed in the rectangular frame; wherein, the aeration hollow membrane unit comprises an aeration branch pipe connected with an external aeration pipe; the aeration branch pipes are arranged at the bottom of the aeration hollow membrane unit at equal intervals, each aeration branch pipe is communicated with a plurality of air inlet pipes, each air inlet pipe is correspondingly connected with a hollow membrane, and the hollow membrane is suspended in the rectangular frame through a support; the biological filler unit comprises a plurality of biological fillers hung vertically.

2. An oxygen-enriched bioreactor suitable for in situ remediation of micro-contaminated water according to claim 1, wherein: aquatic plant floating island unit is equipped with a plurality of through-hole structures including fixing the ecological case on aeration hollow membrane unit and biofilm carrier unit upper portion, ecological bottom of the case portion, has laid zeolite basic unit and planted the aquatic plant at zeolite basic unit in the ecological case, and the root system of aquatic plant sees through the through-hole structure of ecological bottom of the case portion and gets into in aeration hollow membrane unit and the biofilm carrier unit.

3. An oxygen-enriched bioreactor suitable for in situ remediation of micro-contaminated water according to claim 1, wherein: the hollow membranes vertically suspended in the aeration hollow membrane unit are arranged in a matrix manner.

4. An oxygen-enriched bioreactor suitable for in situ remediation of micro-contaminated water according to claim 1, wherein: the two sides of the rectangular frame are symmetrically provided with floating cylinder structures.

5. An oxygen-enriched bioreactor suitable for in situ remediation of micro-contaminated water according to claim 1, wherein: the air inlet end of the aeration pipe is connected with the air blower, and the aeration pipe is provided with an air inlet valve.

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