Iron-carbon micro-electrolysis coupling algal-bacterial symbiosis reaction system for mariculture wastewater treatment

Abstract

The utility model discloses an iron-carbon micro-electrolysis coupling bacteria-algae symbiotic reaction system for mariculture wastewater treatment, and aims to solve the problem that organic pollutants are degraded insufficiently due to filler hardening and passivation in long-term operation of the conventional single iron-carbon micro-electrolysis industrial wastewater treatment technology. According to the iron-carbon micro-electrolysis coupling algal-bacterial symbiosis reaction system, the aeration disc is arranged at the bottom of the algal-bacterial symbiosis reactor, iron-carbon filler is filled in the iron-carbon porous reaction box, the iron-carbon porous reaction box is arranged in the algal-bacterial symbiosis reactor, algae and aerobic bacteria are added into mariculture wastewater in the algal-bacterial symbiosis reactor, and the algal-bacterial symbiosis reactor is arranged in the algal-bacterial symbiosis reactor. A water outlet and a sludge outlet are respectively formed in the bottom of the side wall of the algal-bacterial symbiotic reactor; the water outlet is communicated with the water outlet tank through a water outlet pipe. According to the utility model, iron-carbon micro-electrolysis and algal-bacterial symbiosis are coupled, so that the removal efficiency of the algal-bacterial symbiosis system on refractory pollutants is improved, and the problems of hardening and passivation in the iron-carbon micro-electrolysis process are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial wastewater treatment, and specifically relates to an iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating seawater aquaculture wastewater. Background Art

[0002] The bacteria-algae symbiotic system is a sustainable wastewater treatment process. In the bacteria-algae symbiotic system, microalgae cells produce oxygen / organic matter through photosynthesis to accelerate bacterial metabolism, and the carbon dioxide produced by bacteria through respiration can serve as a carbon source for microalgae cells. However, the pollutant removal cycle is long, and there are deficiencies in the decomposition and mineralization of some difficult-to-degrade macromolecular organic matter.

[0003] Micro-electrolysis technology can achieve the decomposition and mineralization of a variety of difficult-to-degrade macromolecular organic matter in pollutants through electrochemical redox reactions, flocculation and sedimentation, adsorption, and electrical enrichment. However, a single micro-electrolysis process has the problem of filler compaction and passivation in long-term operation, which affects the removal efficiency of organic pollutants. Utility Model Content

[0004] The purpose of the utility model is to solve the problems that the existing single iron-carbon micro-electrolysis industrial wastewater treatment technology has filler compaction and passivation in long-term operation, resulting in insufficient degradation of organic pollutants; and the bacteria-algae symbiotic reaction system has poor denitrification and phosphorus removal efficiency in a high-salinity environment, which restricts the development of sewage treatment technology, and to provide an iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for industrial wastewater treatment.

[0005] The utility model discloses an iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater, comprising a water inlet box, a water inlet pump, an iron-carbon porous reaction box, a bacteria-algae symbiotic reactor, a drainage valve, a mud discharge valve, an aeration pump, a water outlet box, an iron-carbon filler, algae, aerobic bacteria and a mud discharge box, an aeration plate is arranged at the bottom of the bacteria-algae symbiotic reactor, the aeration plate is connected to the aeration pump through an air pipe, the iron-carbon porous reaction box is filled with the iron-carbon filler, the box body of the iron-carbon porous reaction box is a mesh structure, the iron-carbon porous reaction box is arranged in the bacteria-algae symbiotic reactor, algae and aerobic bacteria are added to the marine aquaculture wastewater in the bacteria-algae symbiotic reactor, and a drainage port and a mud discharge port are respectively opened at the bottom of the side wall of the bacteria-algae symbiotic reactor;

[0006] The water inlet box is connected with the water inlet of the bacteria-algae symbiosis reactor through a water inlet pipe, a water inlet pump is arranged on the water inlet pipe, one end of the mud discharge pipe is connected with the mud discharge port of the bacteria-algae symbiosis reactor, the other end of the mud discharge pipe is connected with the mud outlet box, a mud discharge valve is arranged on the mud discharge pipe, the drain outlet of the bacteria-algae symbiosis reactor is connected with the water outlet box through a water outlet pipe, a drain valve is arranged on the water outlet pipe.

[0007] The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater has the following beneficial effects:

[0008] The utility model iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system combines the iron-carbon micro-electrolysis technology with the bacteria-algae symbiotic reaction system. Iron and carbon constitute a large number of macroscopic and microscopic primary battery reactions in the water phase, and are accompanied by a variety of chemical reaction processes, such as oxidation-reduction reactions, electrochemical enrichment, flocculation precipitation, adsorption and other series of action processes. These actions influence and cooperate with each other, thereby achieving the removal of pollutants in wastewater, and can degrade a variety of large molecular difficult-to-biodegrade organic compounds, effectively improving the biodegradability of wastewater, that is, providing better wastewater conditions for the bacteria-algae symbiotic system to deeply remove pollutants. The biological action of bacteria and algae effectively solves the problems of hardening and passivation that occur in the long-term operation of the iron-carbon micro-electrolysis process. The interaction and mutual benefit of the two effectively improves the removal efficiency of pollutants.

[0009] The utility model realizes the coupling of iron-carbon micro-electrolysis and bacteria-algae symbiosis by adding an iron-carbon porous reaction box into the bacteria-algae symbiosis reactor, greatly improving the removal efficiency of the bacteria-algae symbiosis system for difficult-to-degrade pollutants, effectively solving the problems of material compaction and passivation in the long-term operation of the iron-carbon micro-electrolysis process, and extending the stable operation period of the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for marine aquaculture wastewater treatment;

[0011] Figure 2 This is a schematic diagram of the structure of the iron-carbon porous reaction box. DETAILED DESCRIPTION

[0012] Specific implementation method one: The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater in this embodiment includes an inlet tank 1, an inlet pump 2, an iron-carbon porous reaction box 3, a bacteria-algae symbiotic reactor 4, a drain valve 5, a mud valve 6, an aeration pump 7, an outlet tank 8, an iron-carbon filler 10, algae and aerobic bacteria 11 and a mud outlet box 12. The bottom of the bacteria-algae symbiotic reactor 4 is provided with an aeration plate, which is connected to the aeration pump 7 through an air pipe. The iron-carbon porous reaction box 3 is filled with iron-carbon filler 10. The box body of the iron-carbon porous reaction box 3 is a mesh structure. The iron-carbon porous reaction box 3 is arranged in the bacteria-algae symbiotic reactor 4. Algae and aerobic bacteria 11 are added to the marine aquaculture wastewater in the bacteria-algae symbiotic reactor 4. The bottom of the side wall of the bacteria-algae symbiotic reactor 4 is respectively provided with a drain port and a mud outlet;

[0013] The water inlet box 1 is connected with the water inlet of the bacteria-algae symbiosis reactor 4 through a water inlet pipe, a water inlet pump 2 is arranged on the water inlet pipe, one end of the mud discharge pipe is connected with the mud discharge port of the bacteria-algae symbiosis reactor 4, the other end of the mud discharge pipe is connected with the mud outlet box 12, a mud discharge valve 6 is arranged on the mud discharge pipe, the drain outlet of the bacteria-algae symbiosis reactor 4 is connected with the water outlet box 8 through a water outlet pipe, and a drain valve 5 is arranged on the water outlet pipe.

[0014] In this embodiment, the mesh of the iron-carbon porous reaction box is smaller than the particle size of the iron-carbon filler, thereby preventing the iron-carbon filler from leaking out.

[0015] In this embodiment, the iron-carbon filler 10 is separated from the algae and aerobic bacteria 11 by the iron-carbon porous reaction box 3, but is connected to the algae and aerobic bacteria 11 in the bacteria-algae symbiotic reactor 4 through the pores on the iron-carbon porous reaction box 3 and seawater when the system is running, and reacts together to achieve the effect of wastewater treatment.

[0016] This implementation method couples the iron-carbon micro-electrolysis process with the bacteria-algae symbiotic system. On the one hand, the iron ions released by the micro-electrolysis reaction are important components of the activated sludge microbial biooxidase and microalgae chlorophyll synthase, and can promote the catalytic activity of the enzyme, thereby improving the bacteria-algae system's ability to deeply degrade pollutants; on the other hand, the interaction between bacteria and algae has a certain effect on alleviating the compaction and passivation of the iron-carbon filler. Therefore, the coupling of iron-carbon micro-electrolysis and bacteria-algae symbiosis can not only enhance the bacteria-algae treatment effect, but also make up for the shortcomings of the iron-carbon micro-electrolysis reaction, which is conducive to the removal of difficult-to-degrade pollutants.

[0017] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the liquid level controller 13 is arranged in the bacteria-algae symbiotic reactor 4, and the liquid level controller 13 is connected to the water inlet pump 2.

[0018] Specific implementation method three: This implementation method is different from specific implementation methods one or two in that the temperature control device 14 is arranged in the bacteria-algae symbiotic reactor 4.

[0019] In this embodiment, the temperature control device is used to ensure that the reaction temperature of the entire reaction system changes within a controllable range.

[0020] Specific embodiment 4: This embodiment is different from specific embodiments 1 to 3 in that the iron-carbon filler 10 is spherical with a diameter of 1-3 mm.

[0021] Specific embodiment five: This embodiment is different from specific embodiments one to four in that the bacteria-algae symbiotic reactor 4 is installed on a reactor base 9 .

[0022] Specific embodiment 6: This embodiment is different from specific embodiments 1 to 5 in that LED lamps 15 are provided on both sides of the bacteria-algae symbiotic reactor 4 .

[0023] The light intensity of the LED lamp 15 in this embodiment is 5000-6000 lx, and the light color is 6500 K. The light-dark ratio of the LED lamp is controlled to be 12:12 to provide a lighting environment for the photosynthesis of the microalgae in the bacteria-algae symbiotic reactor.

[0024] Embodiment: The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater in this embodiment comprises an inlet tank 1, an inlet pump 2, an iron-carbon porous reaction box 3, a bacteria-algae symbiotic reactor 4, a drain valve 5, a mud valve 6, an aeration pump 7, an outlet tank 8, a reactor base 9, an iron-carbon filler 10, algae and aerobic bacteria 11, a mud outlet box 12, a liquid level controller 13, a temperature control device 14 and an LED lamp 15. The bottom of the iron-carbon porous reaction box 3 is inclined, and an aeration plate is provided on the left side of the bottom of the bacteria-algae symbiotic reactor 4 (between the left wall of the bacteria-algae symbiotic reactor 4 and the iron-carbon porous reaction box 3), and the aeration plate is connected to the aeration pump 7 through an air pipe. The iron-carbon porous reaction box 3 is filled with an iron-carbon filler 10, and the box body of the iron-carbon porous reaction box 3 is a mesh structure. The iron-carbon porous reaction box 3 is arranged in the middle of the bacteria-algae symbiotic reactor 4. Algae and aerobic bacteria 11 are added to the seawater aquaculture wastewater in the bacteria-algae symbiotic reactor 4. A drainage port and a mud discharge port are respectively opened at the bottom of the side wall of the bacteria-algae symbiotic reactor 4. A liquid level controller 13 is arranged in the bacteria-algae symbiotic reactor 4, and the liquid level controller 13 is connected to the water inlet pump 2. A temperature control device 14 is arranged in the bacteria-algae symbiotic reactor 4, and the system temperature is controlled to be room temperature (23-28°C). LED lamps 15 are arranged on both sides of the bacteria-algae symbiotic reactor 4;

[0025] The water inlet box 1 is connected with the water inlet of the bacteria-algae symbiosis reactor 4 through a water inlet pipe, a water inlet pump 2 is arranged on the water inlet pipe, one end of the mud discharge pipe is connected with the mud discharge port of the bacteria-algae symbiosis reactor 4, the other end of the mud discharge pipe is connected with the mud outlet box 12, a mud discharge valve 6 is arranged on the mud discharge pipe, the drain outlet of the bacteria-algae symbiosis reactor 4 is connected with the water outlet box 8 through a water outlet pipe, and a drain valve 5 is arranged on the water outlet pipe.

[0026] In this embodiment, support frames are set on the front wall and the rear wall of the bacteria-algae symbiosis reactor 4, and the iron-carbon porous reaction box 3 is installed and fixed on the support frame. The iron-carbon porous reaction box 3 divides the bacteria-algae symbiosis reactor 4 into two left and right areas. When the reactor is running, the gas pumped in by the aeration pump 7 carries the wastewater and bacteria and algae in the left area upward during the rising process, and then flows to the right area and sinks to the bottom, thereby realizing the circulation and reflux of marine aquaculture wastewater.

[0027] In this embodiment, the algae and aerobic bacteria 11 in the bacteria-algae symbiotic reactor 4 are formed by culturing pyrenoid chlorella and aerobic bacteria from sewage plant sludge. The drain valve 5 is opened once every 24 hours, that is, the water is changed once every 24 hours, and the drain valve opening is the drainage liquid level. The mud discharge valve 6 is opened once every 30 days, that is, the mud is discharged once every 30 days, and the mud discharge valve opening is the mud discharge height.

[0028] The process of using the iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system of this embodiment to treat seawater aquaculture wastewater is as follows:

[0029] The water inlet tank 1 pumps the seawater aquaculture wastewater into the bacteria-algae symbiotic reactor 4 through the water inlet pump 2. The iron-carbon filler 10 is arranged in the iron-carbon porous reaction box 3 and is separated from the bacteria-algae symbiotic reactor 4 by the porous box wall of the iron-carbon porous reaction box 3. Algae and aerobic bacteria 11 are added into the bacteria-algae symbiotic reactor 4 (the biomass of bacteria and algae is 2500-3000 mg / L). The aeration pump 7 pumps air into the reaction system through the aeration plate below the bacteria-algae symbiotic reactor 4 to ensure the fluidization state and dissolved oxygen concentration in the iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system.

[0030] The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system described in this embodiment has a TN removal rate of more than 98% and a TP removal rate of more than 95% in marine aquaculture wastewater, and the removal effect is good.

Claims

1. An iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater, characterized in that The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system comprises a water inlet box (1), a water inlet pump (2), an iron-carbon porous reaction box (3), a bacteria-algae symbiotic reactor (4), a drainage valve (5), a mud discharge valve (6), an aeration pump (7), a water outlet box (8), an iron-carbon filler (10), algae and aerobic bacteria (11) and a mud discharge box (12); an aeration plate is arranged at the bottom of the bacteria-algae symbiotic reactor (4); the aeration plate is connected to the aeration pump (7) via an air pipe; the iron-carbon porous reaction box (3) is filled with the iron-carbon filler (10); the box body of the iron-carbon porous reaction box (3) is a mesh structure; the iron-carbon porous reaction box (3) is arranged in the bacteria-algae symbiotic reactor (4); algae and aerobic bacteria (11) are added to the seawater aquaculture wastewater in the bacteria-algae symbiotic reactor (4); and a drainage port and a mud discharge port are respectively opened at the bottom of the side wall of the bacteria-algae symbiotic reactor (4); The water inlet box (1) is connected to the water inlet of the bacteria-algae symbiotic reactor (4) through a water inlet pipe, a water inlet pump (2) is arranged on the water inlet pipe, one end of the mud discharge pipe is connected to the mud discharge port of the bacteria-algae symbiotic reactor (4), the other end of the mud discharge pipe is connected to the mud outlet box (12), a mud discharge valve (6) is arranged on the mud discharge pipe, and the water outlet of the bacteria-algae symbiotic reactor (4) is connected to the water outlet box (8) through a water outlet pipe, and a water discharge valve (5) is arranged on the water outlet pipe.

2. The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater according to claim 1, characterized in that The liquid level controller (13) is arranged in the bacteria-algae symbiotic reactor (4), and the liquid level controller (13) is connected to the water inlet pump (2).

3. The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater according to claim 1 is characterized in that The temperature control device (14) is arranged in the bacteria-algae symbiotic reactor (4).

4. The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater according to claim 1, characterized in that The iron-carbon filler (10) is spherical with a diameter of 1-3 mm.

5. The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater according to claim 1, characterized in that The bacteria-algae symbiotic reactor (4) is installed on a reactor base (9).

6. The iron-carbon micro-electrolysis coupled bacteria-algae symbiotic reaction system for treating marine aquaculture wastewater according to claim 1, characterized in that LED lamps (15) are arranged on both sides of the bacteria-algae symbiotic reactor (4).

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