Micro electrolytic packing material
Micro electrolysis packing, also known as iron carbon packing or iron carbon micro electrolysis packing, is one of the important conditions for treating wastewater using micro electrolysis technology.
Standardized microelectrolysis fillers and iron carbon fillers are made by sintering multi-component metal alloy fusion catalysts at 1300 degrees Celsius. Solved the problem of iron carbon filler plate formation and passivation. In the process of wastewater treatment, it generates a potential difference of 0.9~1.7V and forms countless primary batteries inside the equipment. The primary batteries use wastewater as an electrolyte and discharge through the anode and cathode to achieve electrochemical treatment of wastewater, thereby achieving the goal of electrochemical degradation of organic matter in wastewater.
Introduction to Micro electrolysis Technology
The iron carbon microelectrolysis technology mainly utilizes the combined effects of the reducibility, electrochemistry, and coagulation adsorption of iron ions to purify wastewater.
The electrolytic materials used in the iron carbon microelectrolysis process generally consist of cast iron shavings and activated carbon or coke. When the material is immersed in industrial wastewater (such as coking wastewater, electroplating wastewater), both internal and external electrolytic reactions occur. On the one hand, cast iron contains trace amounts of iron carbide, and there is a significant oxidation-reduction potential difference between iron carbide and pure iron. As a result, many fine primary cells are formed inside the cast iron chips. Pure iron acts as the anode of the primary cell, while iron carbide acts as the cathode. In an aqueous solution containing acidic electrolyte, electrochemical reactions occur, causing iron to become divalent iron ions and enter the solution. In addition, the cast iron shavings and the surrounding carbon powder form larger primary batteries, so the process of wastewater treatment using microelectrolysis is actually a dual electrolysis process of internal and external, or referred to as the presence of micro and macro primary battery reactions. In addition, to increase the potential difference and promote the release of iron ions, a certain proportion of catalyst can also be added to the iron carbon microelectrolysis filler.
The electrochemical reaction process occurs as follows:
Anode (Fe): Fe-2e → Fe2+E (Fe/Fe2+)=0.44V
Cathode (C): 2H++2e → H2E (H+/H2)=0.00V
In the reaction, nascent Fe2+and atomic H are generated, which have high chemical activity and can change the structure and characteristics of many organic compounds in wastewater, causing chain breakage, ring opening, and other reactions of organic compounds.
If there is aeration, the following reactions will also occur:
O2+4H++4e→2H2OE(O2)=1.23V
O2+2H2O+4e→4OH-E(O2/OH-)=0.41V
Fe2++O2+4H+→2H2O+Fe3+
The OH - generated during the reaction is the reason for the increase in pH value of the effluent, while the Fe3+generated by the oxidation of Fe2+gradually hydrolyzes to form a highly polymerized Fe (OH) 3 colloidal flocculant, which can effectively adsorb and condense suspended solids and heavy metal ions in water, and its adsorption performance is much higher than that of general Fe (OH) 3, thereby enhancing the purification effect of wastewater.
Characteristics of Iron Carbon Microelectrolysis Technology
Fast reaction rate, generally industrial wastewater only takes half an hour to several hours;
The scope of organic pollutants is wide, such as difficult to remove and degrade organic substances containing even fluorine, carbon double bonds, nitro groups, and halogenated structures, which have good degradation effects;
The process flow is simple, the service life is long, the investment cost is low, the operation and maintenance are convenient, the operating cost is low, and the treatment effect is stable. Only a small amount of microelectrolyte reactants are consumed during the processing. Micro electrolysis agents only need to be added regularly without replacement, and can be added directly without activation.
After microelectrolysis treatment, wastewater will form native ferrous or iron ions in the water, which have better coagulation effect than ordinary coagulants. There is no need to add coagulants such as iron salts, and the COD removal rate is high, without causing secondary pollution to the water;
It has good coagulation effect, high color and COD removal rate, and can greatly improve the biodegradability of wastewater.
This method can achieve the effect of chemical precipitation for phosphorus removal and can also remove heavy metals through reduction;
For the high concentration organic wastewater treatment projects that have been built but have not yet met the standards, using this technology as a pre-treatment for the existing project wastewater can improve the biodegradability of the wastewater while degrading COD, ensuring stable and compliant discharge after wastewater treatment. Further treatment of biochemical wastewater can also be achieved through micro electrolysis or a combination of micro electrolysis and biofilter processes.
Each unit of this technology can be used as a separate treatment method or as a pre-treatment process for biological treatment, which is beneficial for sludge settling and biofilm formation.
application area
This product is specifically designed for the treatment of wastewater with high organic concentration, high toxicity, high chromaticity, and difficult biodegradability. It can significantly reduce the chromaticity and COD of the wastewater, increase the B/C ratio, and enhance the biodegradability of the wastewater.
It can be widely used in various industrial wastewater treatment and treatment water reuse projects such as printing and dyeing, chemical industry, electroplating, pulping and papermaking, pharmacy, wool washing, pesticide, Pickled vegetables, alcohol, etc.
Dyes and printing and dyeing wastewater; Coking wastewater; Petrochemical water---- At the same time as decolorization, the BOD/COD values of the treated wastewater were significantly increased.
Petroleum wastewater; Leather wastewater; Paper making wastewater and wood processing wastewater---- The BOD/COD values of the treated wastewater have significantly increased.
Electroplating wastewater; Printing wastewater; Mining wastewater; Other wastewater containing heavy metals---- Heavy metals can be removed from the aforementioned wastewater.
Organic phosphorus agricultural wastewater; Organic chlorine agricultural wastewater---- Greatly improve the biodegradability of the above-mentioned wastewater, and remove phosphorus and sulfides.
