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CN-122010251-A - Electric flocculation system coupled with solid electrolyte and deep dephosphorization method for phosphorus-containing wastewater

CN122010251ACN 122010251 ACN122010251 ACN 122010251ACN-122010251-A

Abstract

The invention relates to the technical field of wastewater treatment, in particular to an electric flocculation system coupled with solid electrolyte and a deep dephosphorization method of phosphorus-containing wastewater, wherein the electric flocculation system coupled with the solid electrolyte comprises an anode and a cathode coupled with an adsorbent solid electrolyte layer; the solid electrolyte layer of the adsorbent type is anion exchange resin with the adsorption capacity to phosphorus. The solid electrolyte electric flocculation system is used for phosphorus-containing wastewater with low phosphate concentration, and can realize phosphate enrichment so as to accelerate the removal rate of phosphate by fully playing the advantages and characteristics of the adsorbent solid electrolyte and the electric flocculation system, and can improve the energy consumption of a common electric flocculation system due to the low conductivity of the low-concentration phosphorus-containing wastewater, and the solid electrolyte electric flocculation system greatly reduces the energy consumption of the system by introducing the adsorbent solid electrolyte layer.

Inventors

  • CHEN HONG
  • LIU SHAN

Assignees

  • 南方科技大学

Dates

Publication Date
20260512
Application Date
20260113

Claims (10)

  1. 1. The electroflocculation system coupled with the solid electrolyte is characterized by comprising an anode and a cathode coupled with an adsorbent solid electrolyte layer, wherein the adsorbent solid electrolyte layer is anion exchange resin with adsorption capacity for phosphorus, and the electroflocculation system is used for phosphorus-containing wastewater with phosphorus concentration lower than 100mg/L and/or conductivity lower than 3000 mu S/cm.
  2. 2. An electroflocculation system for coupling a solid state electrolyte as claimed in claim 1 wherein said anode and said cathode are spaced apart and said sorbent-type solid state electrolyte layer is disposed on a side of said cathode adjacent said anode.
  3. 3. An electroflocculation system for coupling a solid state electrolyte as claimed in claim 1 wherein the spacing between the anode and the cathode is 0.1cm-10cm.
  4. 4. The solid electrolyte coupled electroflocculation system of claim 1, wherein the anion exchange resin is selected from one or more of IRA-402 resin, D-201 resin, a-107 resin, IRA-400 resin, IRA-900 resin, 201 x 7 resin, RTA-200 resin.
  5. 5. The electroflocculation system of claim 1, wherein the anode is made of iron, aluminum or an alloy of iron and aluminum, and the cathode is made of titanium, an inert metal or carbon cloth.
  6. 6. An electroflocculation system for coupling a solid state electrolyte as claimed in claim 1 wherein the thickness of the adsorbent type solid state electrolyte layer is 0.1cm-10cm.
  7. 7. A deep phosphorous removal method for phosphorous-containing wastewater based on an electroflocculation system coupled to a solid electrolyte as claimed in any one of claims 1-6, comprising the steps of; providing phosphorus-containing wastewater; immersing an anode and a cathode coupled with an adsorbent solid electrolyte layer in the phosphorus-containing wastewater; and applying constant current or constant voltage to the anode and the cathode to complete the deep dephosphorization of the phosphorus-containing wastewater.
  8. 8. The deep phosphorous removal method of phosphorous wastewater of claim 7, wherein said constant current is 0.01A-10A.
  9. 9. The deep phosphorous removal method of phosphorous wastewater of claim 7, wherein said constant voltage is 1V-30V.
  10. 10. The deep phosphorous removal method of phosphorous wastewater of claim 7, wherein the phosphorous concentration of said phosphorous wastewater is less than 100mg/L.

Description

Electric flocculation system coupled with solid electrolyte and deep dephosphorization method for phosphorus-containing wastewater Technical Field The invention relates to the technical field of wastewater treatment, in particular to an electric flocculation system coupled with solid electrolyte and a deep dephosphorization method of phosphorus-containing wastewater. Background Over the last decades, various methods and techniques have been developed to remove phosphate from wastewater, which is an important cause of eutrophication of water bodies. However, these methods tend to face the challenges of low efficiency and high input cost in facing the low concentration phosphate wastewater treatment problem. Among these technologies, the adsorption method is most suitable for treating low-concentration phosphorus-containing wastewater because of its high treatment efficiency, and is capable of selectively removing and recovering phosphorus from wastewater while reducing the phosphorus concentration to an extremely low level. However, in order to achieve this objective in practical applications, it is necessary to develop an adsorbent having a high capacity and specific preference for phosphate, while its complicated operation flow, high regeneration costs by the alkali desorbent, and further treatments required to recover phosphorus from the alkali desorbent, so that the wide application of the method is limited. The electric flocculation method utilizes renewable electric power to realize high phosphate radical removal efficiency, is considered as a promising green strategy, has the characteristics of easy operation, strong adaptability and no harm to the environment, and can realize the removal and recovery of phosphate radicals at the same time without consuming any chemical reagent. The working mechanism mainly depends on that the iron anode is oxidized to generate iron ions after being electrified, and phosphate radicals are removed through coprecipitation or adsorption, so that phosphorus is transferred from a liquid phase to a solid phase, and phosphorus removal is realized. However, when treating low-concentration phosphorus-containing water bodies represented by eutrophic water bodies, the electrocoagulation process requires a long running time to generate enough iron ions to further reduce the phosphate concentration, resulting in extremely high power consumption and iron anode consumption, and generates a large amount of sludge with extremely low phosphorus content, which greatly limits the application of this technology in treating low-concentration phosphorus-containing water bodies. Meanwhile, the problem of low conductivity of low-concentration natural water exists, so that a large amount of electric energy is consumed in the conventional electric flocculation method for treating the water. Accordingly, the prior art is still in need of improvement and development. Disclosure of Invention In view of the defects of the prior art, the invention aims to provide an electric flocculation system coupled with solid electrolyte and a deep dephosphorization method of phosphorus-containing wastewater, and aims to solve the problems of high power consumption and high anode consumption when the existing electric flocculation system is used for treating low-concentration phosphorus-containing water. The technical scheme of the invention is as follows: An electric flocculation system coupled with solid electrolyte comprises an anode and a cathode coupled with an adsorbent solid electrolyte layer, wherein the adsorbent solid electrolyte layer is anion exchange resin with adsorption capacity to phosphorus, and the electric flocculation system is used for phosphorus-containing wastewater with phosphorus concentration lower than 100mg/L and/or conductivity lower than 3000 mu S/cm. The electric flocculation system for coupling the solid electrolyte is characterized in that the anode and the cathode are arranged at intervals, and the adsorbent type solid electrolyte layer is arranged on one side of the cathode, which is close to the anode. The electroflocculation system for coupling the solid electrolyte, wherein the distance between the anode and the cathode is 0.1cm-10cm. The electric flocculation system for coupling the solid electrolyte, wherein the anion exchange resin is selected from one or more of IRA-402 resin, D-201 resin, A-107 resin, IRA-400 resin, IRA-900 resin, 201X 7 resin and RTA-200 resin. The electroflocculation system for coupling the solid electrolyte is characterized in that the anode is made of iron, aluminum or an alloy of iron and aluminum, and the cathode is made of titanium, inert metal or carbon cloth. The electric flocculation system for coupling the solid electrolyte is characterized in that the thickness of the adsorbent type solid electrolyte layer is 0.1cm-10cm. A deep dephosphorization method of phosphorus-containing wastewater based on an electroflocculation system coupled with a