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CN-118270945-B - Culture tail water treatment device and treatment method based on piezoelectric reinforcement

CN118270945BCN 118270945 BCN118270945 BCN 118270945BCN-118270945-B

Abstract

The invention relates to a culture tail water treatment device and a treatment method based on piezoelectric reinforcement. According to the invention, high-pressure sewage is input into the jet aerator to generate negative pressure in the jet aerator, so that external air is sucked into the jet aerator to be mixed with sewage, on one hand, the oxygen content of the sewage can be improved, and on the other hand, the piezoelectric air filter membrane can be induced to generate a piezoelectric effect through flowing air to obtain piezoelectric charge and voltage, and the piezoelectric charge can react with oxygen and water to generate active oxygen species, so that conversion from air kinetic energy to electric energy and chemical energy is realized. The piezoelectric voltage directly drives the anode and the cathode to work, functional bacteria of the biological treatment unit are directionally enriched, the activity of functional microorganisms is improved, and active oxygen species can directly degrade organic pollutants, so that the pollutant removing performance is synergistically enhanced.

Inventors

  • SU CHUANGJIAN
  • LIN ZHANGWEN
  • LIN WEIBIAO
  • XU XIN
  • SHU YAN
  • ZHANG MEILING

Assignees

  • 广东省环境科学研究院

Dates

Publication Date
20260508
Application Date
20240401

Claims (8)

  1. 1. The culture tail water treatment device based on piezoelectric reinforcement is characterized by comprising a water supply pump (1), a jet aerator (2), a biological aerated filter (3) and an anaerobic tank (4), The input end of the aeration biological filter (3) is connected with the output end of the jet aerator (2), and a first cathode (31) and a first anode (32) are arranged in the aeration biological filter (3); the input end of the anaerobic tank (4) is connected with the output end of the biological aerated filter (3), and a second cathode (41) and a second anode (42) are arranged in the anaerobic tank (4); The water supply pump (1) is connected with the input end of the jet aerator (2), the jet aerator (2) is provided with an air suction inlet (21), a piezoelectric air filter membrane (5) is arranged in the air suction inlet (21), the water supply pump (1) is used for pressurizing sewage and then inputting the sewage into the jet aerator (2), the jet aerator (2) is used for converting the pressurized sewage into high-speed jet flow, and external air is sucked into the jet aerator (2) from the air suction inlet (21) through negative pressure generated by the high-speed jet flow, so that the sewage is mixed with the air; the first cathode (31), the first anode (32), the second cathode (41) and the second anode (42) are electrically connected with the piezoelectric air filter membrane (5).
  2. 2. The culture tail water treatment device based on piezoelectric reinforcement according to claim 1, wherein the input end of the jet aerator (2) is provided with a nozzle (6), and the nozzle (6) is connected with a water supply pump (1) through a water inlet pipe (61).
  3. 3. The culture tail water treatment device based on piezoelectric reinforcement according to claim 2, wherein the jet aerator (2) comprises a suction chamber (2 a), a mixing chamber (2 b) and a diffusion chamber (2 c) which are connected in sequence, and the nozzle (6) and the air suction inlet (21) are connected with the suction chamber (2 a).
  4. 4. The culture tail water treatment device based on piezoelectric reinforcement according to claim 1, further comprising a first filtering device (7), wherein an output end of the first filtering device (7) is connected with an input end of the water supply pump (1).
  5. 5. The culture tail water treatment device based on piezoelectric reinforcement according to claim 1, further comprising a blower (33), wherein an aeration disc is arranged at the bottom of the biological aerated filter (3), and the output end of the blower (33) is connected with the aeration disc.
  6. 6. The culture tail water treatment device based on piezoelectric reinforcement according to claim 1, further comprising a back flushing device (34), wherein a back flushing water pipe is arranged at the bottom of the biological aerated filter (3), and the back flushing device (34) is connected with the back flushing water pipe.
  7. 7. The culture tail water treatment device based on piezoelectric reinforcement according to claim 1, further comprising a flocculation precipitation device (8) and a second filtering device (9), wherein the input end of the flocculation precipitation device (8) is connected with the output end of the anaerobic tank (4), and the input end of the second filtering device (9) is connected with the output end of the flocculation precipitation device (8).
  8. 8. A treatment method based on the piezoelectric-reinforced culture tail water treatment device as claimed in any one of claims 1 to 7, characterized by comprising the following steps: Pretreating sewage; Pressurizing the pretreated sewage, and inputting the pressurized sewage into a nozzle (6); the pressurized sewage forms high-speed jet flow through a nozzle (6) and is input into a suction chamber (2 a), the high-speed jet flow forms negative pressure in the suction chamber (2 a), external air is sucked into the suction chamber (2 a) through an air suction inlet (21), the air generates piezoelectric effect when passing through a piezoelectric air filter membrane (5), the air and the sewage are mixed in a mixing chamber (2 b), and primary treatment water is obtained after the air and the sewage are decelerated and depressurized in a diffusion chamber (2 c); the potential of the first cathode (31) and the first anode (32) is maintained through the piezoelectric effect generated by the piezoelectric air filter membrane (5), and the primary treatment water is input into the biological aerated filter (3) for aeration treatment, so as to obtain secondary treatment water; the potential of the second cathode (41) and the second anode (42) is maintained through the piezoelectric effect generated by the piezoelectric air filter membrane (5), and the secondary treatment water is input into the anaerobic tank (4) for anaerobic reaction to obtain tertiary treatment water; And (3) dephosphorizing and filtering the water treated for three times to obtain the discharge water reaching the standard.

Description

Culture tail water treatment device and treatment method based on piezoelectric reinforcement Technical Field The invention relates to the technical field of cultivation tail water treatment, in particular to a cultivation tail water treatment device and a treatment method based on piezoelectric reinforcement. Background The water quality characteristics of the culture tail water are mainly high salinity effect and salinity fluctuation. The main sources and the proportion of the pollutants in the culture tail water are respectively surplus baits, metabolites, household garbage, antibiotics used for controlling diseases and insects, disinfectants for cleaning the culture pond and the like. The untreated cultivation tail water is directly discharged, and the environment is seriously affected. The culture tail water treatment technology is mainly divided into physical, chemical and biological 3 types, wherein a microbiological method serving as one of the biological treatment technologies has wide application prospect due to the advantages of small occupied area, low running cost, convenient and efficient management and the like. Patent CN 113772900A discloses a high-efficient denitrification and dephosphorization process system for the treatment of the tail water of cultivation, which comprises a physical filtering device, a high-efficient biological treatment unit, a flocculation sedimentation tank, a sand filter tank, a clean water tank, a sludge tank and the like, wherein the biological treatment unit is sequentially connected with the aeration biological filter tank, the anaerobic tank and the aeration biological filter tank, the biological treatment of the device is more complex, sludge is generated, and a carbon source is required to be added to strengthen the treatment performance. In order to further improve the treatment performance of the cultivation tail water, the patent CN 113371816B discloses a high-efficiency denitrification reactor, a system and a method for the cultivation tail water, wherein the reactor body is divided into a cathode chamber and an anode chamber from top to bottom, and the high-efficiency denitrification process driven by sulfur circulation is realized, so that the carbon source consumption in the cultivation tail water treatment process is effectively reduced, and the treatment effect on the nitrogenous tail water is improved. In recent years, piezoelectric nano-generators have attracted attention because of the ability of piezoelectric materials to convert mechanical energy into electrical energy. Patent CN 115536964B discloses a flexible piezoelectric nano-generator, the pressure can excite the piezoelectric effect of the piezoelectric material layer to output voltage, further patent CN 116988914A discloses a ocean energy collecting device based on the piezoelectric effect, ocean wave energy generates electricity by exciting the piezoelectric effect of the piezoelectric material in the electricity generating unit. In addition, patent CN 111330640B discloses a piezoelectric catalytic air filter for purifying air, when air flows through the piezoelectric catalytic filter, the air flow disturbance can excite the piezoelectric catalytic filter to generate a piezoelectric effect, so as to generate electric charges, and the electric charges can react with oxygen in the air to generate active oxygen species, such as superoxide radical, so as to realize air purification. In the process of treating the culture tail water by the current microbiological method, pollutants are removed mainly through metabolism of microorganisms, the adaptability of functional bacteria to a high-salt environment is not strong, the problem that growth of functional microorganisms is inhibited occurs, the pollutant removal performance is poor, the stability is poor, and the problems of high energy consumption of a treatment system and high treatment cost of the culture tail water can be caused by adopting a traditional weak current intervention strengthening treatment method. Disclosure of Invention The invention aims to solve the technical problem and provide a culture tail water treatment device and a treatment method based on piezoelectric reinforcement. In order to solve the technical problems, the invention adopts the following technical scheme: a culture tail water treatment device based on piezoelectric reinforcement comprises a water supply pump, a jet aerator, a biological aerated filter and an anaerobic tank, The input end of the aeration biological filter is connected with the output end of the jet aerator, and a first cathode and a first anode are arranged in the aeration biological filter; The input end of the anaerobic tank is connected with the output end of the biological aerated filter, and a second cathode and a second anode are arranged in the anaerobic tank; The water supply pump is connected with the input end of the jet aerator, the jet aerator is provided with an air suction inlet