Study On Coupling Technology Of Water Treatment Based On Electrocoagulation Electricity Generation

Electrocoagulation technology is an in-situ water treatment technology that covers multiple physical and chemical processes such as electrolytic redox,electrolytic flocculation and electroflotation,and can treat wastewater that is difficult to biodegrade and high in salt and toxic.The high energy consumption is the limitation of electrocoagulation,which greatly limits the wide application of electroflocculation technology in industry.In this paper,a method for producing electric electrocoagulation process is proposed for treating wastewater,which first uses galvanic cell to generate electricity for the subsequent electrocoagulation,and then uses electrocoagulation to treat the pollutants.The producing electric electrocoagulation process,combines the advantages of electricity from the galvanic cell and high-efficiency treatment of pollutants in water.Studies the parameters of the coupling technology and the effect of treating wastewater.Through the research of this subject,it is great significance to solve the problem of high energy consumption of the current electrocoagulation treatment wastewater.Different electrode materials have different electrochemical properties,which have an important impact on the galvanic cell and electrocoagulation technology.Therefore,starting from the selection of electrode materials and the initial pH,porous nickel,porous iron and porous carbon electrodes were selected as working electrodes,and the electrochemical curves at different pH values were analyzed and compared.The three electrode materials have different oxygen reduction capacities at different pH values,and the H⁺concentration is large,and the oxygen reduction performance is good.Due to the different electrode materials,the overpotential of the electrodes is different,which also affects the sample reduction performance.Similarly,the H⁺concentration also affects the discharge performance of the electrode.The higher the H⁺concentration,the better the discharge performance.The pH value changes the form of ions in the solution,and the different galvanic cell/electrocoagution time ratio?FC/EC?changes the pH value of the solution,thus affecting the amount and structure of the flocs during the electric electrocoagulation process.The effects of different pH values and FC/EC time ratios on floc size and floc structure were studied by using iron-porous nickel,iron-porous iron and iron-porous carbon.When the three electrode combinations are at pH=2,the FC/EC ratio increases and the amount of flocs increases.As the pH increases,the amount of flocs increases first and then decreases.At the same time,the FC/EC ratio and pH increase,the peaks of?-FeOOH and?-FeOOH gradually increase,and then gradually convert to Fe2O3 and Fe3O4.By comparing the floc structure under different electrode combinations,it was found that the fluoropolymer process tends to stabilize the floc structure under the Fe-porous carbon electrode,mainly?-FeOOH.For Fe-porous iron and Fe-porous nickel electrodes,the galvanic cell accelerates the conversion of?-FeOOH to Fe₂O₃ and Fe₃O₄.In order to explore the effect of electric electrocoagulation process on pollutant removal and energy consumption,the last part of this paper selects MO,Ni²⁺and F^-wastewater to explore the removal rate of pollutants in different FC/EC time ratios and the process of pollutant removal.The impact of energy consumption.Through exploration and analysis,the increase of galvanic time has changed the removal rate and energy consumption of MO,Ni²⁺and F^-.It also proves that electric electrocoagulation process is an effective way to remove pollutants and save energy.