CN113354096B - Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof - Google Patents

Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof Download PDF

Info

Publication number
CN113354096B
CN113354096B CN202110765374.2A CN202110765374A CN113354096B CN 113354096 B CN113354096 B CN 113354096B CN 202110765374 A CN202110765374 A CN 202110765374A CN 113354096 B CN113354096 B CN 113354096B
Authority
CN
China
Prior art keywords
micro
reoxygenation
microalgae
sludge bed
aerobic sludge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110765374.2A
Other languages
Chinese (zh)
Other versions
CN113354096A (en
Inventor
张潇
田野
李慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan University of Technology
Original Assignee
Taiyuan University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiyuan University of Technology filed Critical Taiyuan University of Technology
Priority to CN202110765374.2A priority Critical patent/CN113354096B/en
Publication of CN113354096A publication Critical patent/CN113354096A/en
Application granted granted Critical
Publication of CN113354096B publication Critical patent/CN113354096B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
    • C02F3/325—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae as symbiotic combination of algae and bacteria
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/009—Apparatus with independent power supply, e.g. solar cells, windpower, fuel cells
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/043—Treatment of partial or bypass streams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

The invention discloses a solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combined device. The device comprises a micro-oxygen treatment unit, an external circulation micro-algae reoxygenation and sedimentation integrated tank, a solar cell module and a light supplement lamp; the micro-aerobic treatment unit comprises a micro-aerobic sludge bed, a reoxygenation water return pipe and a reflux pump; a micro-aerobic sludge filler is arranged in the micro-aerobic sludge bed; the micro-aerobic sludge bed is connected with an external circulation micro-algae reoxygenation and sedimentation integrated tank through a water outlet pipe, and the external circulation micro-algae reoxygenation and sedimentation integrated tank can be connected with a plurality of micro-oxygen treatment units; the light supplement lamp is connected with the solar cell module through the storage battery and the charging controller. The device can be applied to wastewater treatment.

Description

Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof
Technical Field
The invention relates to a solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof in wastewater treatment, belonging to the technical field of wastewater treatment.
Background
At present, most of municipal sewage treatment plants adopt a sewage treatment mode taking an aerobic activated sludge process as a core, and have the defects of high aeration rate, high energy consumption, high sludge yield and high CO2The defects of discharge amount and the like face the great trends of upgrading and reconstruction, energy conservation and emission reduction and the like of sewage plants, few new constructions and more reconstruction are guaranteed, and the implementation of a new process is promoted by improving or reconstructing the structures of the traditional process, so that the problems which need to be solved urgently in the sewage treatment industry are solved. The micro-aerobic biological denitrification system generally controls the low dissolved oxygen concentration of 0.3-1.0 mg/L, the dissolved oxygen concentration on the surface of sludge flocs is higher, and more aerobic bacteria grow because of O2Transfer resistance, and lack of O inside sludge flocs2Therefore, the micro-aerobic biological denitrification system creates a living environment in which aerobic bacteria, anaerobic bacteria and facultative bacteria with various metabolic categories coexist, so that nitrification and denitrification can synchronously occur. In addition, the micro-aerobic biological denitrification system has low demand on carbon sources, produces less residual sludge, and has the advantages of adapting to various water qualities, realizing denitrification and carbon removal of a single reactor and the like. The microalgae is a unicellular organism or small community algae plant with tiny shape, high growth speed and high photosynthetic efficiency, and has higher aerationThe gas efficiency shows huge advantages and potential in the production aspect of biomass diesel oil replacing fossil energy, and the gas efficiency shows good adsorption and removal performance on heavy metal and nitrogen and phosphorus pollution in sewage. Compared with single sludge denitrification, the phycobiont technology can utilize light energy to produce oxygen and reduce CO2The discharge of the method has the capability of self-regulating pH, and the proliferated microalgae is a product with high added value, so that the sewage is changed into valuable, and the method is a promising sewage treatment process.
In the current research of the phycobiont system, microalgae and bacteria are mainly mixed together according to a certain proportion, the growth of the microalgae is blocked due to the shading effect of sewage chromaticity, turbidity, sludge and the like, and the harvesting difficulty and the cost of the microalgae after the phycomycetes are mixed are the bottleneck for restricting the development of microalgae biofuel. The solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed process can save the aeration energy consumption, improve the harsh and energy consumption requirements of a single aerobic or anoxic technology on reaction conditions, reduce the difficulty and cost of microalgae harvesting, and is a promising sewage treatment process.
Disclosure of Invention
The invention aims to provide a solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof.
The invention combines the microalgae reoxygenation and micro-aerobic activated sludge technologies for the first time, uses oxygen produced by microalgae photosynthesis as an oxygen supply mode of a micro-aerobic reaction device, uses energy stored by a solar cell to supply power for microalgae photosynthesis at night, constructs a solar power supply-microalgae aeration-coupled backflow oxygen supply micro-aerobic sludge bed process, can effectively control the dissolved oxygen concentration in micro-aerobic sludge bed water by controlling the backflow ratio of an external circulation micro-algae reoxygenation and precipitation integrated tank, further removes nitrogen and phosphorus pollutants in the effluent of the micro-aerobic sludge bed by algae in the external circulation micro-algae reoxygenation and precipitation integrated tank, improves the removal efficiency of pollutants in sewage treatment, and has important practical significance in the practical application of sewage treatment.
The invention provides a solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device which comprises a hydrolysis acidification treatment unit, a micro-aerobic treatment unit, an external circulation microalgae reoxygenation and precipitation integrated tank, a solar cell module and a light supplement lamp, wherein the hydrolysis acidification treatment unit is connected with the micro-aerobic treatment unit;
the micro-aerobic treatment unit comprises a micro-aerobic sludge bed, a micro-aerobic sludge filler, a reoxygenation water return pipe (returning reoxygenation water from the external circulation micro-algae reoxygenation and sedimentation integrated tank to the micro-aerobic sludge bed), a return pump, a water outlet pipe and a micro-aerobic residual sludge discharge pipe; a micro-aerobic sludge filler is arranged in the micro-aerobic sludge bed; the micro-aerobic sludge bed is connected with an external circulation micro-algae reoxygenation and sedimentation integrated tank through a water outlet pipe, and the external circulation micro-algae reoxygenation and sedimentation integrated tank can be connected with a plurality of micro-oxygen treatment units;
the top of the external circulation microalgae reoxygenation and precipitation integrated tank is provided with an overflow weir, the external circulation microalgae reoxygenation and precipitation integrated tank is of a cylindrical structure and is arranged in a clear water tank of a cuboid structure, the bottom of the clear water tank is provided with a water outlet discharge pipe, and water in the external circulation microalgae reoxygenation and precipitation integrated tank overflows to the clear water tank through the top overflow weir and is discharged through a water outlet discharge pipe of the clear water tank; an interception net is arranged in the external circulation microalgae reoxygenation and sedimentation integrated tank for intercepting microalgae, a microalgae reoxygenation water return pipe is arranged above the interception net and below the liquid level at the top of the interception net and is connected with a micro-aerobic sludge bed through a return pump, the bottom of the micro-aerobic sludge bed is inverted cone-shaped, and the bottom of the micro-aerobic sludge bed is provided with a sludge discharge port;
the light supplement lamp is connected with the solar cell module through the storage battery and the charging controller; the light supplement lamp is provided with an illumination intensity regulator; the solar cell module is provided with a switch.
The above-described apparatus is further described as follows:
the volume ratio of the micro-aerobic sludge bed to the external circulation micro-algae reoxygenation and precipitation integrated tank is 1: 1-0.1: 1.
The aperture of the interception net in the external circulation microalgae reoxygenation and precipitation integrated tank is less than 1 cm. The mouth of the reoxygenation water return pipe is arranged below the liquid level of the overflow weir of the external circulation microalgae reoxygenation and precipitation integrated tank and between the interception nets, and the distances between the mouth of the reoxygenation water return pipe and the liquid level of the overflow weir and the distances between the mouth of the reoxygenation water return pipe and the interception nets are all larger than 3 cm.
The quantity of the light supplementing lamps is determined according to the illumination intensity, and the light supplementing lamps can be installed at the central position inside the external circulation microalgae reoxygenation and sedimentation integrated tank or around the inner wall for one circle, and also can be installed outside and around the outer wall for one circle. Further, when the external circulation microalgae reoxygenation and precipitation integrated pool is made of transparent glass, a plurality of light supplement lamps are arranged inside or on the outer wall of the external circulation microalgae reoxygenation and precipitation integrated pool, and when the external circulation microalgae reoxygenation and precipitation integrated pool is made of opaque materials such as concrete or steel, the light supplement lamps are arranged inside the external circulation microalgae reoxygenation and precipitation integrated pool.
The micro-aerobic sludge bed adopts a structure with a column body at the upper part and a cone body at the lower part.
The invention provides application of the solar power supply-microalgae aeration-coupled backflow oxygen supply micro-aerobic sludge bed combination device in wastewater treatment.
The application comprises the following steps:
waste water gets into micro-aerobic sludge bed bottom water inlet, by the ammonia oxidizing bacteria in the micro-aerobic sludge bed, nitrite oxidizing bacteria, autotrophic and heterotrophic denitrifying bacteria, the pollutant in the waste water is handled to the bacterial community such as anaerobic ammonia oxidizing bacteria, the waste water through handling flows into integrative pond of extrinsic cycle microalgae reoxygenation sediment from the export of micro-aerobic sludge bed through the outlet pipe, produce oxygen through the photosynthesis of little algae in integrative pond of extrinsic cycle microalgae reoxygenation sediment and realize the water body reoxygenation process, waste water after part reoxygenation is through the reoxygenation water back flow pipe by the backwash pump pressurization backward flow to micro-aerobic sludge bed in for the bacterial community provides oxygen, the reflux ratio is 1: 1-30: 1, discharging the rest of the wastewater subjected to reoxygenation through an overflow weir of the external circulation microalgae reoxygenation and precipitation integrated tank to obtain qualified effluent, and discharging the residual sludge at the bottom of the micro-aerobic sludge bed through a micro-aerobic residual sludge discharge pipe.
In the method, when the illumination intensity is lower than 5000 lux, the light supplement lamp is turned on.
In the method, the content of microalgae is more than 6 × 107cells/mL。
In the method, the microalgae in the external circulation microalgae reoxygenation and precipitation integrated tank can be used for further removing nitrogen and phosphorus.
In the method, the reflux pump can further control the concentration of dissolved oxygen in the micro-aerobic sludge bed through the reflux ratio of the reoxygenation water.
The invention provides solar power supplyIn the combined device of microalgae aeration and coupled reflux oxygen supply micro-aerobic sludge bed, the soluble CO in the effluent water is treated by ammonia oxidizing bacteria, nitrite oxidizing bacteria, autotrophic and heterotrophic denitrifying bacteria, anaerobic ammonia oxidizing bacteria and other bacteria in the micro-aerobic sludge bed2The carbon source is provided for the microalgae in the external circulation microalgae reoxygenation and sedimentation integrated tank, and the oxygen is provided for aerobic bacteria in the sludge bed by the oxygen generated by the photosynthesis of the microalgae in the external circulation microalgae reoxygenation and sedimentation integrated tank and the reoxygenation water flowing back to the tank. The coordinated action of the bacteria and the microalgae can promote the growth of the microalgae, improve the removal effect of nitrogen and phosphorus in the wastewater, save the aeration operation and save the operation cost. In addition, carbon dioxide generated by organic matter degradation is absorbed by microalgae, greenhouse gas emission is reduced, and the atmospheric pollution condition of a sewage treatment plant adopting a traditional activated sludge process as a greenhouse gas emission house is relieved.
The invention has the beneficial effects that:
(1) the invention adopts the algae-bacteria separation technology, better controls the quantitative relation between the algae and the bacteria, reduces the mutual influence of the algae and the bacteria, and avoids the influence of the bacteria and the algae on the dissolved oxygen concentration stability in the sludge bed due to the photosynthesis of the algae in the same space.
(2) The invention can realize the mutual beneficial symbiosis of algae and bacteria, the algae is arranged on the micro-aerobic sludge bed, the inhibiting effect of high nitrogen and phosphorus concentration in the wastewater on the algae is avoided, and simultaneously, the residual nitrogen and phosphorus in the effluent of the micro-aerobic device can be further removed by the algae, the coupling relation between the nitrogen and phosphorus can be exerted, and the high-efficiency nitrogen and phosphorus removal is realized.
(3) The invention regulates and controls the concentration of dissolved oxygen in the micro-aerobic sludge bed by adjusting the reflux ratio of the reoxygenation water and regulating the reflux ratio of the reoxygenation water to the micro-aerobic sludge bed in a mode of supplying oxygen as aerobic bacteria in the micro-aerobic sludge bed, has high control precision, saves aeration equipment, avoids the maintenance problem caused by the blockage of the aeration equipment, and has low power consumption and cost.
(4) The solar cell module is used for storing electricity during the day and supplying power for the photosynthesis of algae at night, so that the electricity consumption cost is low.
(5) The external circulation microalgae reoxygenation and precipitation integrated pool disclosed by the invention reoxygenation through algae photosynthesis, can realize the phenomenon of supersaturation of water body dissolved oxygen in the external circulation microalgae reoxygenation and precipitation integrated pool, the solubility in water can reach 12mg/L at normal temperature and normal pressure, the reflux ratio proportion of reoxygenation water is reduced, and the energy consumption is low.
Drawings
FIG. 1 is a schematic structural diagram of a solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device
FIG. 2 is a schematic structural diagram of a solar power supply-microalgae aeration-coupling reflux oxygen supply micro-aerobic sludge bed combination device with a plurality of micro-aerobic treatment units connected with an external circulation microalgae reoxygenation and sedimentation integrated tank.
In the figure: 1. the device comprises a micro-aerobic sludge bed, 2 micro-aerobic sludge fillers, 3 an external circulation micro-algae reoxygenation and precipitation integrated tank, 4 a solar cell module, 5 a storage battery, 6 a charging controller, 7 a light supplement lamp, 8 a reoxygenation water return pipe, 9 a return pump, 10 a water outlet pipe, 11 a water outlet discharge pipe, 12 a micro-aerobic residual sludge discharge pipe, 13 an interception net, 14 and a clean water tank.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1:
as shown in fig. 1-2, a solar power supply-microalgae aeration-coupling reflux oxygen supply micro-aerobic sludge bed combination device comprises a micro-aerobic treatment unit, an external circulation microalgae reoxygenation and precipitation integrated tank, a solar cell module and a light supplement lamp;
the micro-aerobic treatment unit comprises a micro-aerobic sludge bed 1, a micro-aerobic sludge filler 2 and a reoxygenation water return pipe 8, wherein the reoxygenation water return pipe 8 returns reoxygenation water from the external circulation micro-algae reoxygenation and precipitation integrated tank 3 to the micro-aerobic sludge bed 1 through a return pump 9, a water outlet pipe 10 is arranged on the side surface of the micro-aerobic sludge bed 1, and a micro-aerobic residual sludge discharge pipe 12 is arranged at the bottom of the micro-aerobic sludge bed 1; a micro-aerobic sludge filler 2 is arranged in the micro-aerobic sludge bed 1; the water outlet discharge pipe 11 leads to the bottom of the external circulation microalgae reoxygenation and precipitation integrated tank 3, the micro-aerobic sludge bed 1 is connected with the external circulation microalgae reoxygenation and precipitation integrated tank 3 through a water outlet pipe 10, and the external circulation microalgae reoxygenation and precipitation integrated tank 3 can be connected with a plurality of micro-oxygen treatment units (as shown in figure 2).
The top of the external circulation microalgae reoxygenation and precipitation integrated tank 3 is provided with an opening and an overflow weir, the external circulation microalgae reoxygenation and precipitation integrated tank 3 is of a cylindrical structure and is arranged in a clean water tank 14 of a cuboid structure, the bottom of the clean water tank 14 is provided with a water outlet discharge pipe 11, and water in the external circulation microalgae reoxygenation and precipitation integrated tank 3 overflows to the clean water tank 14 through the top overflow weir and is discharged through the water outlet discharge pipe 11 of the clean water tank 14; an interception net 13 is arranged in the external circulation microalgae reoxygenation and sedimentation integrated tank 3 for intercepting microalgae, a microalgae reoxygenation water return pipe 8 is arranged above the interception net 13 and below the liquid level at the top of the tank, the reoxygenation water return pipe is connected with a micro-aerobic sludge bed 1 through a return pump 9, the bottom of the micro-aerobic sludge bed 1 is inverted cone-shaped, and a sludge discharge port is arranged at the bottom of the micro-aerobic sludge bed;
the light supplement lamp 7 is connected with the solar cell module 4 through the storage battery 5 and the charging controller 6; the light supplement lamp 7 is provided with an illumination intensity regulator; the solar cell module 4 is provided with a switch.
The above-described apparatus is further described as follows:
the volume ratio of the micro-aerobic sludge bed 1 to the external circulation micro-algae reoxygenation and precipitation integrated tank 3 is 1: 1-0.1: 1.
The aperture of the interception net 13 in the external circulation microalgae reoxygenation and precipitation integrated tank 3 is less than 1 cm. The pipe orifice of the reoxygenation water return pipe 8 is arranged between the lower part of the liquid level of the overflow weir of the external circulation microalgae reoxygenation and sedimentation integrated tank 3 and the interception net 13, and the distances between the pipe orifice of the reoxygenation water return pipe 8 and the liquid level of the overflow weir and the interception net are all more than 3 cm.
The quantity of the light supplementing lamps is determined according to the illumination intensity, and the light supplementing lamps can be installed at the central position inside the external circulation microalgae reoxygenation and sedimentation integrated tank 3 or around the inner wall for one circle, and also can be installed outside and around the outer wall for one circle. Further, when the external circulation microalgae reoxygenation and precipitation integrated pool 3 is made of transparent glass, a plurality of light supplement lamps 7 are arranged inside or on the outer wall of the external circulation microalgae reoxygenation and precipitation integrated pool 3, and when the external circulation microalgae reoxygenation and precipitation integrated pool 3 is made of lightproof materials such as concrete or steel, the light supplement lamps 7 are arranged inside the external circulation microalgae reoxygenation and precipitation integrated pool 3.
The micro-aerobic sludge bed 1 adopts an inverted cone-shaped structure with a column body at the upper part and a cone body at the lower part.
The invention provides application of the solar power supply-microalgae aeration-coupled backflow oxygen supply micro-aerobic sludge bed combination device in wastewater treatment.
The application comprises the following steps:
taking urban domestic wastewater with COD, ammonia nitrogen and total nitrogen average concentration of 400 mg/L, 35 mg/L and 50mg/L respectively as an example, the wastewater enters a water inlet at the bottom of a micro-aerobic sludge bed, pollutants in the wastewater are treated by bacteria groups such as ammonia oxidizing bacteria, nitrite oxidizing bacteria, autotrophic and heterotrophic denitrifying bacteria, anaerobic ammonia oxidizing bacteria and the like in the micro-aerobic sludge bed, the treated wastewater flows into an external circulation microalgae reoxygenation and precipitation integrated tank from an outlet of the micro-aerobic sludge bed through a water outlet pipe, the photosynthesis of little algae in the integrative pond of extrinsic cycle little algae reoxygenation sediment produces oxygen and realizes the water reoxygenation process, and waste water after the part reoxygenation provides oxygen for the fungus crowd in by backwash pump pressurization backward flow to little oxygen sludge bed through the reoxygenation water reflux pipe, and the dissolved oxygen concentration in the integrative pond of extrinsic cycle little algae reoxygenation sediment is about 9 mg/L, and the reflux ratio is 5: 1, after backflow, the dissolved oxygen concentration in the micro-aerobic sludge bed is 0.55 mg/L, the rest wastewater after reoxygenation is discharged through an overflow weir of an external circulation microalgae reoxygenation and precipitation integrated tank to obtain qualified effluent, and the average concentrations of COD, ammonia nitrogen and total nitrogen of the effluent are respectively lower than 30 mg/L, 3 mg/L and 5 mg/L, thereby meeting the first-class A standard of GB 18918 plus 2002 pollutant discharge Standard of urban Sewage treatment plants. And residual sludge at the bottom of the micro-aerobic sludge bed is discharged through a micro-aerobic residual sludge discharge pipe.
In the above method, when the illumination intensity is lower than 5000 lux, the fill-in light 13 is turned on.
In the method, the content of microalgae is more than 6 × 107cells/mL。
In the method, the microalgae in the external circulation microalgae reoxygenation and precipitation integrated tank 3 can be used for further removing nitrogen and phosphorus.
In the above method, the reflux pump 9 can control the dissolved oxygen concentration in the micro-aerobic sludge bed 1 by the reflux ratio of the reoxygenation water.

Claims (9)

1. A solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device is characterized in that: the device comprises a micro-oxygen treatment unit, an external circulation micro-algae reoxygenation and sedimentation integrated tank, a solar cell module and a light supplement lamp;
the micro-aerobic treatment unit comprises a micro-aerobic sludge bed, a micro-aerobic sludge filler, a reoxygenation water return pipe, a return pump, a water outlet pipe and a micro-aerobic residual sludge discharge pipe; a micro-aerobic sludge filler is arranged in the micro-aerobic sludge bed; the micro-aerobic sludge bed is connected with an external circulation micro-algae reoxygenation and sedimentation integrated tank through a water outlet pipe, and the external circulation micro-algae reoxygenation and sedimentation integrated tank can be connected with a plurality of micro-oxygen treatment units;
the top of the external circulation microalgae reoxygenation and precipitation integrated tank is provided with an overflow weir, the external circulation microalgae reoxygenation and precipitation integrated tank is of a cylindrical structure and is arranged in a clear water tank of a cuboid structure, the bottom of the clear water tank is provided with a water outlet discharge pipe, and water in the external circulation microalgae reoxygenation and precipitation integrated tank overflows to the clear water tank through the top overflow weir and is discharged through a water outlet discharge pipe of the clear water tank; an interception net is arranged in the external circulation microalgae reoxygenation and sedimentation integrated tank for intercepting microalgae, a reoxygenation water return pipe is arranged above the interception net and below the liquid level at the top of the interception net and is connected with a micro-aerobic sludge bed through a return pump, the bottom of the micro-aerobic sludge bed is inverted cone-shaped, and the bottom of the micro-aerobic sludge bed is provided with a sludge discharge port;
the light supplement lamp is connected with the solar cell module through the storage battery and the charging controller; the light supplement lamp is provided with an illumination intensity regulator; the solar cell module is provided with a switch.
2. The solar energy powered-microalgae aerated-coupled reflux oxygen supply micro-aerobic sludge bed combination device as claimed in claim 1, wherein: the volume ratio of the micro-aerobic sludge bed to the external circulation micro-algae reoxygenation and precipitation integrated tank is 1: 1-0.1: 1.
3. The solar energy powered-microalgae aerated-coupled reflux oxygen supply micro-aerobic sludge bed combination device as claimed in claim 1, wherein: the aperture of an interception net in the external circulation microalgae reoxygenation and precipitation integrated tank is less than 1 cm; the mouth of the reoxygenation water return pipe is arranged below the liquid level of the overflow weir of the external circulation microalgae reoxygenation and precipitation integrated tank and between the interception nets, and the distances between the mouth of the reoxygenation water return pipe and the liquid level of the overflow weir and the distances between the mouth of the reoxygenation water return pipe and the interception nets are all larger than 3 cm.
4. The solar energy powered-microalgae aerated-coupled reflux oxygen supply micro-aerobic sludge bed combination device as claimed in claim 1, wherein: the quantity of the light supplementing lamps is determined according to the illumination intensity, and the light supplementing lamps are installed in the central position inside the external circulation microalgae reoxygenation and precipitation integrated pool or surround the inner wall for one circle, or are installed outside the external circulation microalgae reoxygenation and precipitation integrated pool and surround the outer wall for one circle.
5. The solar powered-microalgae aerated-coupled reflux oxygen supply micro-aerobic sludge bed combination device as claimed in claim 4, wherein: when the external circulation microalgae reoxygenation and precipitation integrated pool is made of transparent glass, a plurality of light supplement lamps are arranged inside or on the outer wall of the external circulation microalgae reoxygenation and precipitation integrated pool, and when the external circulation microalgae reoxygenation and precipitation integrated pool is made of light-tight materials, the light supplement lamps are arranged inside the external circulation microalgae reoxygenation and precipitation integrated pool.
6. The solar energy powered-microalgae aerated-coupled reflux oxygen supply micro-aerobic sludge bed combination device as claimed in claim 1, wherein: the micro-aerobic sludge bed adopts a structure with a column body at the upper part and a cone body at the lower part.
7. The application of the solar power supply-microalgae aeration-coupled backflow oxygen supply micro-aerobic sludge bed combination device as claimed in any one of claims 1 to 6 in wastewater treatment is characterized by comprising the following steps:
waste water gets into micro-aerobic sludge bed bottom water inlet, by the ammonia oxidizing bacteria in the micro-aerobic sludge bed, nitrite oxidizing bacteria, autotrophic and heterotrophic denitrifying bacteria, the pollutant in anaerobic ammonia oxidizing bacteria crowd treatment waste water, the waste water of through handling flows into integrative pond of extrinsic cycle little algae reoxygenation sediment from the export of micro-aerobic sludge bed through the outlet pipe, the photosynthesis through little algae reoxygenation of algae in the integrative pond of extrinsic cycle little oxygen sediment produces oxygen and realizes the water reoxygenation process, waste water after part reoxygenation is through the reoxygenation water back flow pipe and is provided oxygen by the backwash pump pressurization backward flow to micro-aerobic sludge bed in for the fungus crowd, the reflux ratio is 1: 1-30: 1, discharging the rest of the wastewater subjected to reoxygenation through an overflow weir of the external circulation microalgae reoxygenation and precipitation integrated tank to obtain qualified effluent, and discharging the residual sludge at the bottom of the micro-aerobic sludge bed through a micro-aerobic residual sludge discharge pipe.
8. The application of the solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device in the wastewater treatment according to claim 7 is characterized in that: the content of microalgae in the external circulation microalgae reoxygenation and precipitation integrated tank is more than 6 multiplied by 107cells/mL。
9. The application of the solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device in the wastewater treatment according to claim 7 is characterized in that: and when the illumination intensity is lower than 5000 lux, turning on the light supplement lamp.
CN202110765374.2A 2021-07-07 2021-07-07 Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof Active CN113354096B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110765374.2A CN113354096B (en) 2021-07-07 2021-07-07 Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110765374.2A CN113354096B (en) 2021-07-07 2021-07-07 Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof

Publications (2)

Publication Number Publication Date
CN113354096A CN113354096A (en) 2021-09-07
CN113354096B true CN113354096B (en) 2022-04-19

Family

ID=77538410

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110765374.2A Active CN113354096B (en) 2021-07-07 2021-07-07 Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof

Country Status (1)

Country Link
CN (1) CN113354096B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103626362B (en) * 2013-12-05 2016-01-13 南通大学 A kind of system of recycling treatment municipal wastewater
CN110563269A (en) * 2019-09-17 2019-12-13 上海济旦水科技有限公司 Sewage treatment device and method for treating sewage by using microalgae and producing microalgae by using sewage
CN116835758A (en) * 2021-01-14 2023-10-03 山东大学 Biological-ecological coupling sewage treatment method
CN113045133A (en) * 2021-03-24 2021-06-29 重庆大学 System and method for treating livestock and poultry breeding wastewater by anaerobic fermentation coupled with microalgae organisms

Also Published As

Publication number Publication date
CN113354096A (en) 2021-09-07

Similar Documents

Publication Publication Date Title
CN101817615A (en) Anaerobic-sequencing batch biofilm reactor-artificial wetland method for treating piggery wastewater
CN103880248A (en) Coking wastewater treatment system and treatment method
CN101033098A (en) Clearance blast aeration oxidation ditch sewage treatment technology
CN103183447A (en) Treatment method of piggery wastewater
CN109485201A (en) A kind for the treatment of process and device for city domestic sewage multistage A/O combined denitrification dephosphorization
CN111138038A (en) Photovoltaic-driven rural domestic sewage integrated treatment system and treatment method
CN210855718U (en) Novel rural sewage treatment system
CN110395851A (en) High aititude urban wastewater treatment method based on nitrogen phosphorus capture and whole process autotrophic denitrification
CN205740505U (en) Microorganism electrochemical is utilized to process the device of sewage
CN100500599C (en) Treatment method and device of rice lees wastewater
CN201614333U (en) Decentralized sewage treatment device
CN108017234A (en) A kind of sewage disposal system and method
CN218931874U (en) Full-quantity treatment equipment for leachate of garbage transfer station
CN113354096B (en) Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof
CN103755025A (en) Double-membrane double-circulation sewage treatment process for enhancing denitrifying phosphorus removal
CN110921976A (en) Integrated sewage purification equipment with micro-nano bubble generator
CN115259386A (en) System and method for treating wastewater by using oligodynamic bacteria and algae through completely autotrophic biomembrane
CN214327268U (en) MABR filler combined sewage treatment device
CN115028267A (en) Waste water recycling device
CN211999376U (en) Rural sewage ecological management device system of MABR
CN113387445B (en) Hydrolytic acidification-solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof
CN203602404U (en) Membrane bioreactor device based on parallel pollutant treatment
CN109516572B (en) Novel autotrophic nitrogen removal combination device and operation parameter adjustment method
CN101570360A (en) Oil refining sewage advanced treatment bioreactor
CN204111419U (en) Biological bed treatment unit under a kind of 360 degree of rotating waters

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant