Deep denitrification filter pool based on electros mediators and inside iron circulation reinforcement

Abstract

The invention provides a deep denitrification filter pool based on electros mediators and inside iron circulation reinforcement, and belongs to the technical field of sewage treatment. The deep denitrification filter pool is characterized by comprising a denitrification filter pool main body, a carbon source, a humus supplementing system and a reverse flushing mud discharging system, wherein the denitrification filter pool main body comprises a water inlet water distribution region, an iron circulation denitrification chamber, an inorganic ore cotton block filtering layer, a soft filling treatment region and a water outlet reoxygenation region in sequential arrangement from bottom to top; the carbon source and the humus supplementing system are connected with the water inlet water distribution region; the reverse flushing mud discharging system is respectively connected with the iron circulation denitrification chamber, the inorganic ore cotton block filtering layer and the soft filling treatment region. An anaerobic denitrification system based on electros mediators and inside iron circulation provides electron donors beyond the carbon source for the denitrification process; the electron transmission efficiency of the biochemical process is promoted; the system denitrification capability is improved; the operation cost of the system is also reduced.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a deep water treatment technology of a biological filter system, in particular to a deep denitrification filter based on an electronic shuttle and internal iron circulation enhancement. Background technique [0002] As a classic form of bioreactor, biofilter is widely used in the advanced treatment of urban domestic sewage, rural wastewater and industrial waste. The denitrification biological filter is improved on the basis of the biological aerated filter, and is used for deep denitrification treatment of sewage. Factors such as structural design, process parameter settings and filter materials affect the denitrification efficiency of the denitrification filter. The key factor. Compared with physical and chemical denitrification methods, denitrification biological filter not only has high denitrification efficiency, but also has the advantage of lower operation and manage...

AI Technical Summary

Problems solved by technology

[0005] Carbon source type and dosage are one of the key factors affecting denitrification efficiency. Methanol, sodium acetate, and glucose have been widely used as denitrification carbon sources, but relying solely on carbon sources as electron donors in engineering applications will lead to operating costs High, the strong reducibility of sponge iron can be NO 3 - The reduction of -N provides an electron donor other than the carbon source, which releases Fe 2+ Under the mediation of iron-oxidizing bacteria, it can also be used as an electron donor to participate in the process of denitrification and denitrification

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