A process for treating sewage in a piece-type precious metal iron-carbon filled sewage reactor

Abstract

The invention discloses a process for treating sewage in a piece-type precious metal iron-carbon filled sewage reactor. The invention discloses a sewage treatment process. After pretreatment, the organic waste water enters the tank body together with the air, and meets the insert-type precious metal filler. The filler evenly releases metal sub-ions to start a micro-electrolysis reaction. The plug-in type precious metal filler is composed of several special steel plate monomers inserted into each other through slots. The special steel plate is made of 0.1-2g of palladium, 0.1-4g of ruthenium, 0.1-2g of niobium, and silver per 10,000 grams of carbon steel. 0.3 ~ 7g, platinum 0.1 ~ 3g, rhodium 0.1 ~ 2g, cast. The sewage treatment process of the present invention has simple steps, is easy to control, truly achieves no passivation, no clogging, and no replacement, and only needs to be maintained once to three times a year, and the maintenance time is about 4 hours each time. The COD removal rate is high and will not Cause secondary pollution to water.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a sewage treatment process of a plug-in type noble metal iron-carbon filler reactor. Background technique [0002] With the development of my country's urban scale and the continuous improvement of the degree of industrialization, a large amount of difficult-to-treat industrial and domestic sewage is produced. Sewage treatment plants are facing severe challenges, especially in the field of industrial sewage treatment, which has a large amount of sewage discharge, complex water quality and high toxicity. , Ammonia nitrogen and COD are relatively high. The traditional sewage treatment process has low efficiency, long process, high investment and operating costs. [0003] The iron-carbon micro-electrolysis reactor can be used to treat printing and dyeing wastewater, pharmaceutical wastewater, chemical wastewater and other fields. Ordinary sewage treatment carriers generally pr...

AI Technical Summary

Problems solved by technology

Ordinary sewage treatment carriers generally process iron filings and charcoal and other carrier materials into a certain shape through batching, forming, firing and other processes. Separation and co-catalyst, and finally reduced and roasted. Although the carrier catalyst made by this process has a relatively large specific surface area and a relatively large contact area with sewage, the carrier is very easy to lose, and because the pore size is too small, it is easy to block. Requires repeated flushing with backwash water to regenerate

In the process of use, the inert layer on the surface of the iron powder prevents the further progress of the micro-electrolysis reaction, and at the same time, it is easy to passivate and harden, resulting in the plugging of the filler layer, and because the iron and carbon are in physical contact, it is easy to form an isolation layer between them. It makes micro-electrolysis unable to continue and loses its function, which leads to frequent replacement of micro-electrolysis materials, which not only has a large workload and high cost, but also affects the treatment effect and efficiency of wastewater

[0004] In addition, the small surface area of ​​traditional micro-electrolysis materials also makes wastewater treatment take a long time, increasing the investment cost per ton of water, which seriously affects the utilization and promotion of micro-electrolysis processes

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