Algae-bacterium symbiotic sewage treatment device and treatment method thereof

Abstract

The invention discloses a bacteria-algae symbiotic sewage treatment device which comprises a sewage treatment device body, and the sewage treatment device body comprises a reaction cavity on the outer layer and a filtering and stirring cavity on the inner layer; light collecting mechanisms are arranged on the top and the outer layer of the reaction cavity; the reaction cavity contains immobilized algae balls and good granular sludge; a light supplementing mechanism, an aeration mechanism, a filler body and a temperature adjusting mechanism are arranged in the reaction cavity; the light collecting mechanism is used for collecting natural light and converging the natural light into the reaction cavity; the light supplementing mechanism is used for supplementing light to the reaction cavity; the aeration mechanism is used for improving the gas conductivity; the filler body provides a symbiotic environment for microorganisms and algae; the temperature regulator is used for regulating the temperature in the sewage treatment device body. The sewage treatment device has good nitrogen and phosphorus removal treatment capacity on sewage, and pollutants and heavy metal ions in the sewage are effectively removed.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an algae-bacteria symbiotic sewage treatment device and a treatment method thereof. Background Art

[0002] Due to the acceleration of urbanization and the development of economic construction, the amount of urban sewage discharge has increased rapidly. The arbitrary discharge of a large amount of untreated urban sewage has not only caused water environmental pollution, but also aggravated the tension of water resources and restricted the development of urban economy. At the same time, these sewage are rich in a large number of inorganic salt ions, organic matter and heavy metals. If they are not completely treated and directly discharged, they will cause pollution of water bodies such as rivers and lakes, thus posing a serious threat to the ecological environment and even water resources. Therefore, sewage must be treated before discharge.

[0003] At present, the activated sludge method is widely used to treat urban sewage. Although it has good removal efficiency, it consumes a lot of energy and has a complicated process. In recent years, many studies at home and abroad have shown that algae has great potential in wastewater treatment. Using algae to repair polluted water can effectively reduce the content of N, P and organic matter in wastewater, enrich and reduce heavy metal ions, and can analyze and recover heavy metals after adsorption.

[0004] The process of using microalgae to treat sewage has received more and more attention. Microalgae plays an important role in purifying natural water bodies in the natural environment. Microalgae use nitrogen, phosphorus and organic matter in water as nutrients, light energy as energy, and water as electron acceptor. Under photosynthesis, microalgae grow themselves, and nitrogen, phosphorus and organic pollutants in the water are removed. Microalgae has great advantages in treating domestic sewage, with low cost and no secondary pollution.

[0005] However, the process of treating sewage with microalgae uses light energy as energy. The intensity of natural light sources varies with time and weather and is extremely unstable, affecting the efficiency of sewage treatment and the stability of the treatment process. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an algae-bacteria symbiotic sewage treatment device, which has good denitrification and phosphorus removal treatment capabilities for sewage and can effectively remove pollutants and heavy metal ions in sewage.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: a sewage treatment device with bacterial and algal symbiosis, comprising a sewage treatment device body, wherein the sewage treatment device body comprises an outer reaction chamber and an inner filtering and stirring chamber; the top and outer layer of the reaction chamber are both provided with light collecting mechanisms; The reaction chamber 1 contains immobilized algae balls and good granular sludge; the reaction chamber is provided with a light supplement mechanism, an aeration mechanism, a filler body and a temperature control mechanism; The light collecting mechanism is used to collect natural light and converge it into the reaction chamber; the light supplement mechanism is used to supplement the reaction chamber; the aeration mechanism is used to improve the gas conductivity; the filler body provides a symbiotic environment for microorganisms and algae; and the temperature control is used to adjust the temperature inside the sewage treatment device body.

[0008] Furthermore, the filter chamber is divided into an upper filter chamber and a lower stirring chamber by a partition; the partition is provided with through holes; the filter chamber is provided with an MBR membrane treatment unit; and the stirring chamber is provided with a stirring assembly.

[0009] Furthermore, the MBR membrane treatment unit is connected to a self-cleaning component.

[0010] Furthermore, the light collecting system includes a light collecting frame and a light reflecting frame arranged around the sewage treatment device body; the light collecting frame and the light reflecting frame are both equipped with condensers; the light reflecting frame is installed on the outer wall of the bottom of the reaction chamber through an angle adjustment component; the light collecting frame is installed on the outer wall of the bottom of the light reflecting frame through a rotating component and an angle adjustment component.

[0011] Furthermore, the light collecting assembly is also used to collect natural light onto the solar photovoltaic panel; the solar photovoltaic panel is connected to the battery unit through an inverter; and the battery is used to supply power.

[0012] Furthermore, the fill light mechanism includes a light emitting diode and a diffuser.

[0013] Furthermore, the aeration mechanism includes a plurality of aeration pipes.

[0014] Furthermore, the immobilized algae balls and aerobic granular sludge; the immobilized algae balls are made of PVA-SA composite carriers and calcium chloride as a fixing agent to embed microalgae; the microalgae are of three types: ordinary microalgae, protein-core Chlorella and Scenedesmus quadricauda.

[0015] Furthermore, the temperature regulating mechanism includes an air cooling pipe, a water cooling pipe, a heating component and a temperature detection probe.

[0016] The present invention also provides a method for treating sewage using a sewage treatment device with bacteria and algae symbiosis, comprising the following steps: (1) Sewage pretreatment: Domestic sewage is first placed in the filtering and stirring chamber of the sewage treatment device, where it is stirred after large impurities are removed; (2) Light collection adjustment: By adjusting the angles of the light collection frame and the reflector frame in real time, natural light is collected into the reaction chamber; (3) Algae symbiotic treatment: A bacteria-algae symbiotic system is placed in the reaction chamber, and water treatment agents are added to the reaction chamber to treat sewage. During the treatment process, the water quality is monitored in real time, the temperature and aeration volume are adjusted in time, and supplementary lighting treatment is performed.

[0017] The beneficial effects of the present invention are: 1) The present invention combines the bacteria-algae symbiotic system with a water treatment agent to treat sewage, has good denitrification and phosphorus removal capabilities for sewage, effectively removes pollutants and heavy metal ions in sewage, and reduces pollution to the environment.

[0018] 2) The present invention achieves a light-chasing effect by setting a light-collecting component, collects natural light in different time periods to the greatest extent, and provides sufficient energy for microalgae processing.

[0019] 3) The present invention solves the instability problem caused by the intensity of natural light source changing with time and weather by providing a fill light component. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below through specific implementation methods.

[0023] refer to Figure 1 , is a bacteria-algae symbiotic sewage treatment device of the present invention, comprising a sewage treatment device body, wherein the sewage treatment device body comprises an outer reaction chamber 1 and an inner filtering and stirring chamber 2; the top and outer layer of the reaction chamber 1 are both provided with a light collecting mechanism 3; The reaction chamber 1 of this embodiment contains immobilized algae balls and good granular sludge; the reaction chamber 1 is provided with a light supplement mechanism 11, an aeration mechanism 12, a filler body 13 and a temperature control mechanism 14; The light collecting mechanism of this embodiment is used to collect natural light and converge it into the reaction chamber 1; the light supplement mechanism is used to supplement the light of the reaction chamber 1; the aeration mechanism is used to improve the gas conductivity; the filler body 13 provides a symbiotic environment for microorganisms and algae; the temperature control is used to adjust the temperature inside the sewage treatment device body.

[0024] The microalgae in the present invention is a kind of low-level single-cell microorganism with tiny morphology, diverse shapes, strong adaptability and wide distribution. It is the primary producer in the water ecological cycle system and plays an important role in environmental restoration and water purification of polluted water. Microalgae grows and metabolizes quickly, and significantly removes N, P and organic matter in eutrophic water. Microalgae can also produce a variety of products such as food, feed, energy, active substances, etc. by fixing carbon dioxide.

[0025] During the photosynthesis process, microalgae can utilize carbon dioxide and absorb nutrients such as N and P that are rich in wastewater. They carry out photosynthesis through the chloroplasts of algae cells, synthesize the cellular substances they need, complete the entire chemical reaction process and release a certain amount of oxygen.

[0026] The inorganic nitrogen sources in wastewater are mainly ammonia nitrogen and nitrate nitrogen with very high content. Microalgae use ammonia nitrogen and nitrate nitrogen to synthesize nutrients such as amino acids and proteins needed for their own growth. However, too high ammonia nitrogen concentration in wastewater will inhibit the growth and metabolism of algae and affect the absorption and degradation of nutrients by algae.

[0027] Microalgae cells convert the absorbed phosphates into substances such as phospholipids through oxidative phosphorylation, photosynthetic phosphorylation and substrate level phosphorylation. The pH value in the wastewater is increased through photosynthesis, which effectively promotes the volatilization of ammonia nitrogen and the precipitation of phosphate, thereby indirectly removing nitrogen and phosphorus in the wastewater.

[0028] The polymer complexes such as polysaccharides, proteins and phospholipids on the surface of microalgae cell walls provide algae with a large number of functional groups that can bind to heavy metal ions, such as carboxyl, hydroxyl, amino, phosphate, etc., which can actively and passively support the removal of heavy metals.

[0029] The filter chamber 2 of this embodiment is divided into an upper filter chamber and a lower stirring chamber by a partition; a through hole is provided on the partition; an MBR membrane treatment unit is provided in the filter chamber; a stirring assembly is provided in the stirring chamber. The stirring chamber is connected to the reaction chamber. A water outlet is provided at the bottom of the reaction chamber, and a water inlet is provided at the top of the filter chamber.

[0030] This embodiment removes large particles of impurities, such as plastic, in the sewage before it is discharged.

[0031] The MBR membrane treatment unit is connected to a self-cleaning component, which can regularly clean the self-cleaning component to improve the filtering effect.

[0032] The light collecting system 3 of this embodiment includes a light collecting frame and a light reflecting frame arranged around the main body of the sewage treatment device; both the light collecting frame and the light reflecting frame are equipped with condensers; the light reflecting frame is installed on the outer wall of the bottom of the reaction chamber 1 through an angle adjustment component; the light collecting frame is installed on the outer wall of the light reflecting frame through a rotating component and an angle adjustment component.

[0033] This embodiment collects natural light through the light collecting component, which can provide more sufficient natural light and provide energy for photosynthesis.

[0034] The light collecting component uses a light collecting frame and a reflective frame to adjust the angles of the light collecting frame and the reflective frame according to the different positions of the sun, so as to better collect natural light and refract the natural light into the reaction chamber through the reflective frame.

[0035] The light collecting component on the top of the reaction chamber does not include a reflective frame, and a light collecting mirror is used to collect the light source into the reaction chamber.

[0036] The side wall of the reaction chamber is installed on the angle adjustment component, and the angle adjustment component is installed on the rotating component.

[0037] Preferably, the light collecting assembly of this embodiment is also used to collect natural light onto a solar photovoltaic panel; the solar photovoltaic panel is connected to a battery unit through an inverter; the battery is used to supply power. A solar photovoltaic panel is arranged outside the light collecting frame, and after the rotating assembly rotates 180 degrees, the light collecting frame is adjusted according to the position of the sun, and the photovoltaic panel works to convert solar energy into electrical energy for storage and supply power.

[0038] The fill light mechanism 11 of this embodiment includes a light emitting diode and a diffuser.

[0039] The aeration mechanism 12 of this embodiment includes a plurality of aeration pipes.

[0040] The immobilized algae balls and aerobic granular sludge of this embodiment; the immobilized algae balls are made of PVA-SA composite carriers and calcium chloride as a fixing agent to embed microalgae; the microalgae are three types of ordinary balls, protein-core Chlorella and Scenedesmus quadricauda.

[0041] The temperature control mechanism 14 of this embodiment includes an air cooling pipe, a water cooling pipe, a heating component and a temperature detection probe.

[0042] The filler body of the present invention is a honeycomb oblique tube filler body.

[0043] The present invention also provides a method for treating sewage using a sewage treatment device with bacteria and algae symbiosis, comprising the following steps: (1) Sewage pretreatment: The domestic sewage is first placed in the filtering and stirring chamber 2 of the sewage treatment device body, and then stirred after removing large impurities; (2) Light collection adjustment: By adjusting the angles of the light collection frame and the reflector frame in real time, natural light is collected into the reaction chamber; (3) Algae symbiotic treatment: The reaction chamber 1 contains a bacteria-algae symbiotic system, and water treatment agents are added to the reaction chamber to treat sewage. During the treatment process, the water quality is monitored in real time, the temperature and aeration volume are adjusted in time, and supplementary light treatment is performed.

[0044] The present invention adopts three kinds of microalgae, namely common microalgae, protein-nucleated microalgae and nuclear quadricaudal scenedesmus, which have good removal effects on CODcr, NH3-N and TP. The immobilized microalgae microalgae are adopted to realize the recovery and recycling of microalgae and reduce costs. The present invention combines the bacteria-algae symbiotic system with a water treatment agent to treat sewage, has good denitrification and phosphorus removal treatment capabilities for sewage, effectively removes pollutants and heavy metal ions in sewage, and reduces pollution to the environment.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A sewage treatment device with bacterial and algal symbiosis, comprising a sewage treatment device body, characterized in that: The sewage treatment device body comprises an outer layer reaction chamber (1) and an inner layer filtering and stirring chamber (2); the top and the outer layer of the reaction chamber (1) are both provided with a light collecting mechanism (3); The reaction chamber (1) contains immobilized algae balls and good granular sludge; a light supplement mechanism (11), an aeration mechanism (12), a filler body (13) and a temperature adjustment mechanism (14) are arranged in the reaction chamber (1); The light collecting mechanism is used to collect natural light and gather the natural light into the reaction chamber (1); the light supplement mechanism is used to supplement the reaction chamber (1); the aeration mechanism is used to increase the gas conductivity; the filler body (13) provides a symbiotic environment for microorganisms and algae; and the temperature control is used to adjust the temperature inside the sewage treatment device body.

2. The sewage treatment device of bacteria-algae symbiosis according to claim 1 is characterized by: The filter chamber (2) is divided into an upper filter chamber and a lower stirring chamber by a partition; the partition is provided with a through hole; an MBR membrane treatment unit is provided in the filter chamber; and a stirring assembly is provided in the stirring chamber.

3. The sewage treatment device of bacteria-algae symbiosis according to claim 1 is characterized by: The MBR membrane treatment unit is connected to a self-cleaning component.

4. The sewage treatment device of bacteria-algae symbiosis according to claim 1 is characterized by: The light collecting system (3) comprises a light collecting frame and a light reflecting frame arranged around the sewage treatment device body; the light collecting frame and the light reflecting frame are both equipped with condensers; the light reflecting frame is installed on the outer wall of the bottom of the reaction chamber (1) through an angle adjustment component; the light collecting frame is installed on the outer wall of the bottom of the light reflecting frame through a rotating component and an angle adjustment component.

5. The sewage treatment device of bacteria-algae symbiosis according to claim 1 is characterized by: The light collecting assembly is also used to collect natural light onto the solar photovoltaic panel; the solar photovoltaic panel is connected to the battery unit through an inverter; and the battery is used to supply power.

6. The sewage treatment device of bacteria-algae symbiosis according to claim 1 is characterized by: The fill light mechanism (11) comprises a light emitting diode and a diffuser.

7. The sewage treatment device of bacteria-algae symbiosis according to claim 1 is characterized by: The aeration mechanism (12) comprises a plurality of aeration tubes.

8. The sewage treatment device of bacteria-algae symbiosis according to claim 1 is characterized by: The immobilized algae balls and aerobic granular sludge; the immobilized algae balls are prepared by using PVA-SA composite carriers and calcium chloride as a fixing agent to embed microalgae; the microalgae are three types: ordinary microalgae, protein-core microalgae and scenedesmus quadricauda.

9. The sewage treatment device of bacteria-algae symbiosis according to claim 1 is characterized by: The temperature adjustment mechanism (14) comprises an air cooling pipe, a water cooling pipe, a heating component and a temperature detection probe.

10. A method for treating sewage using the bacteria-algae symbiotic sewage treatment device according to claim 1, characterized in that: The steps include: (1) Sewage pretreatment: The domestic sewage is first introduced into the filtering and stirring chamber (2) of the sewage treatment device body, and then stirred after removing large impurities; (2) Light collection adjustment: By adjusting the angles of the light collection frame and the reflector frame in real time, natural light is collected into the reaction chamber; (3) Algae symbiotic treatment: The reaction chamber (1) contains a bacteria-algae symbiotic system, and water treatment agents are added to the reaction chamber to treat sewage. During the treatment process, the water quality is monitored in real time, the temperature and aeration volume are adjusted in time, and supplementary light treatment is performed.

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