NFJ-Series Iron-Carbon Bed Microelectrolysis

Iron-carbon bed microelectrolysis is a new type of water treatment technology, which is mainly applied to organic wastewater which is difficult to degrade biologically. Pretreatment of wastewater is a good process. It generates potential difference to electrolyze waste water without external power supply to achieve the purpose of degrading organic pollutants.

NFJ- series iron-carbon bed micro-electrolysis filler produced by Beijing Jinke Composition Material Co., Ltd. is a raw material product specially used for iron-carbon micro-electrolysis in water treatment, which is formed by polarization modification of high-quality iron filings and addition of nano attapulgite, polarized metal, nonmetal and other substances. And special activated carbon according to the optimal proportion. Through repeated tests of dozens of actual waste water, the formula is more reasonable: the defect that the effect of similar products is obvious when starting to use and the efficiency gradually decreases in the future is eliminated, and the efficiency is longer when being used. In addition, the aeration micro-electrolysis reaction bed produced by our company makes the micro-electrolysis treatment of wastewater more remarkable.

Mechanism of Iron-Carbon Bed Microelectrolysis filler

Iron releases iron ions under acidic conditions to generate new ecological Fe2+. Fe2+ has oxidation-reduction function and can undergo oxidation-reduction reaction with many components in wastewater. Destroy chromophoric organic groups in decolorized wastewater to achieve decolorization effect; For refractory organic wastewater, the following electrochemical reactions occur to degrade organic matters. The biodegradability of wastewater is improved. The generated Fe2+ is added and subtracted to adjust the pH value to further generate Fe3+; Fe3+ is a good flocculant. Their hydrates and hydroxides have strong adsorption and flocculation, and suspended substances, toxic substances, metal ions and macromolecules dispersed in water pollution can be adsorbed-flocculated and precipitated.

The electrochemical reaction process is as follows:

Anode (Fe):Fe-2e →Fe2+ E (Fe/Fe2+) =0.44V

Cathode(C) :2H++2e→H2  E(H+/H2)=0.00V

The redox reaction process is as follows:

O2+ 4H++4e→2H2O E(O2)=1.23V

O2+2H2O+4e→40H- E(O2/0H-)=0.41V

Fe2++O2+4H+→2H2O+Fe2+

Comparison between Traditional Iron-Carbon Microelectrolysis and NFJ- Series Iron-Carbon Bed Microelectrolysis

1、Comparison of Micro-electrolysis Fillers

The traditional micro-motor filler uses scrap iron or steel scrap and is mixed with common activated carbon. This method is feasible in the laboratory, but there are many defects in practice.

★Scrap iron or steel scrap varies in quality and thickness; The waste materials are difficult to teach and shear, resulting in different specifications of iron raw materials, uneven mixing with active hair, easy hardening, and even less guaranteed reaction effect.

★For larger practical projects, iron filings or steel are often packed in layers, which not only leads to uneven mixing of iron and carbon and the pressing of filiform waste of steel filings into a fixed cuboid, but also leads to collapse of iron filings or steel filings in active warfare and local hardening, which most affects the reaction effect. More importantly, after a period of operation, the cuboid finally makes the water flow unable to pass evenly, thus causing the reaction tank to be scrapped;

★The iron content of scrap iron or steel scrap is low, and the reaction speed is slow, resulting in huge equipment, high operation cost and troublesome management:

★The reaction time of the traditional iron-carbon micro-electrolysis filler is about 150min, and the treatment effect on COD is only about 30%. After ten days of use, the treatment effect declined rapidly.

NFJ- series iron-carbon bed micro-electrolysis packing is a new type of product processed by polarization modification technology on the basis of summarizing domestic and foreign iron-carbon micro-electrolysis technologies and aiming at some insurmountable technical defects of traditional packing. Has the following advantages:

★The iron raw material has high iron content and large specific surface area, thus greatly improving the reaction speed;

★Iron raw material is an industrial product with stable technical specifications, which is completely different from scrap iron collected at random, with large iron content changes and unstable quality, which is widely used in China;

★The star-shaped iron raw material is uniformly mixed with the active hair, and is regularly supplemented, thus avoiding the defects that common iron filings cannot be uniformly mixed with activated carbon and the utilization rate is low.;

★High-quality activated carbon matching the properties of iron raw materials is adopted to improve the treatment performance;

★According to different influent water quality, the best iron and carbon raw material formula is designed to ensure the best treatment effect;

★The reaction speed is fast, and the equipment investment and operation cost are greatly saved;

★The iron-carbon filler of Jinke Company has been running continuously for more than 180 days, and its treatment effect has no obvious downward trend.

2、Comparison of Micro-electrolysis Reactors

The traditional iron-carbon bed usually uses a fixed-bed iron-carbon reactor. After this kind of reaction device is operated for a period of time, iron filings are easy to agglomerate and the phenomenon of channeling occurs, which greatly affects the treatment effect.

NFJ-series iron-carbon bed is an aeration micro-electrolysis reaction bed formed by properly adjusting the internal structure of a common reactor, which can conveniently transform the traditional fixed bed into a fluidized bed form and adding an aeration device. This kind of reaction device has the following technical advantages:

★Aerated micro-electrolysis reaction bed overcomes the defects that the surface of fixed bed iron-carbon reactor is easy to passivate, the filler is easy to agglomerate and the operation effect gradually decreases with the extension of operation time;

★The aeration micro-electrolysis reaction bed adopts an aeration mode, so that the filler is in a fluidized state, filler particles can fully contact and rub in the fluidization process, FezO3 deposited on the surface of the filler is stripped, and the sediment is prevented from wrapping the filler and blocking and caking;

★The aeration micro-electrolysis reaction bed is easy to operate and will not cause secondary pollution to the surrounding environment.;

★After the iron raw materials in the aeration micro-electrolysis reaction bed are consumed, the automatic device is adopted to add the iron on a regular basis, thus overcoming the biggest defects that the common iron filings frequently fall into the bed and are difficult to replace when falling into the bed;

★Aerated micro-electrolysis reaction beds can be structured and equipped according to scale and user requirements to meet a variety of needs.