Compound polynary micro-electrolysis filler and preparation method thereof

Abstract

The invention relates to a compound polynary micro-electrolysis filler applied in the field of industrial polluted wastewater treatment, and a preparation method thereof. The filler is prepared from, by weight, 40-55 parts of active carbon powder, 20-40 parts of iron powder, 10-20 parts of aluminum powder, 1-3 parts of rhodium powder or ruthenium powder, 15-20 parts of clay and a proper amount of an additive. The preparation method of the filler comprises the following steps: mixing the active carbon powder, the iron powder, the aluminum powder, the rhodium powder or the ruthenium powder, and the clay in proportion, preparing spherical particles, and roasting at a high temperature to obtain the filler. The particle size of the compound polynary micro-electrolysis filler prepared in the invention is 5-10mm. The compound polynary micro-electrolysis filler has the advantages of large specific surface area, high amount of porosity, no passivation, no hardening, reduction of the chemical oxygen demand (COD) and the chroma of wastewater in a short time, and improvement of the biodegradability of the wastewater, has an especially substantial chroma removal effect on the wastewater, and can efficiently treat high-chroma wastewater, such as printing and dyeing wastewater and pharmacy wastewater.

Description

technical field [0001] The invention relates to a composite multi-element micro-electrolytic filler and a preparation method thereof, belonging to the field of environmental protection, in particular to the treatment of industrially polluted wastewater. Background technique [0002] The research on micro-electrolysis technology began in the 1960s, and it has attracted widespread attention mainly in the United States, the Soviet Union, Japan and other countries, and has achieved some practical results. This method was first used in the treatment of electroplating wastewater and heavy metal ion wastewater. In the 1970s, scientists in the former Soviet Union first applied micro-electrolysis technology to the treatment of printing and dyeing wastewater, and my country introduced this method in the 1980s. Because the method has the characteristics of wide application range, simple process, and good treatment effect, it has been widely used in printing and dyeing, petrochemical, ...

AI Technical Summary

Problems solved by technology

[0003] Most of the micro-electrolysis reactors have a fluidized bed structure, and the traditional micro-electrolysis filler is a physical mixture of iron filings and charcoal. As the reaction progresses, Fe is oxidized to Fe 2+ and Fe 3+ , the subsequent generation of Fe(OH) 2 and Fe(OH) 3 It is a very good colloidal flocculant, which will absorb the dispersed substances in the wastewater and adhere to the surface of the filler, passivate and harden the filler, reduce the contact between the wastewater and the filler, and reduce the reaction effect; at the same time, simple mixing cannot make the iron filings and charcoal Fully mixed and contacted, the number of micro-primary batteries actually produced is less than the theoretical value, resulting in a certain degree of "waste" of raw materials