Novel denitrification deep bed filter tank reaction system

Abstract

The invention discloses a novel denitrification deep bed filter tank reaction system. The novel denitrification deep bed filter tank reaction system comprises a denitrification deep bed filter tank composed of a water inlet system, a biological filter material, sewage special-purpose water distribution gas distribution filter bricks, a gas water distribution chamber, a water outlet pipe, a backwashing system, and a carbon source adding system; a plurality of functions are achieved; a plurality of purposes can be achieved using one tank; synchronous removing is adopted to reach TN, SS, and TP three water quality index standards; the quality of discharged water is better than first grade A discharge standard or special discharge value limit standard in <Discharge standard of pollutants for municipal wastewater treatment plant> (GB18918-2002); incomplete denitrification at winter low temperature conditions is avoided; adding of a certain amount of carbon source into the denitrification deep bed filter tank plays an important role in stable reachment of TN standard, and TN discharge standard which is gradually strict in the further is achieved, and TN is ensured to be equal to or lower than 8mg / L.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a novel denitrification deep bed filter reaction system. Background technique [0002] There are more than 4,000 existing urban sewage treatment plants in my country. The implementation of discharge standards is mainly from the first-level B of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) to the first-level A standard or from the first-level A standard. To surface level IV water body standard or special discharge limit standard, level B standard requires ≤20mg / l of total nitrogen, level A standard requires total nitrogen ≤15mg / l, surface level level IV water body standard Or the special emission limit standard requires the total nitrogen to be ≤10mg / l, and even individual local standards have issued a total nitrogen requirement of ≤8mg / l. At present, the total nitrogen inflow indicators of sewage treatment plants in my country are...

AI Technical Summary

Problems solved by technology

At present, the total nitrogen inflow indicators of sewage treatment plants in my country are basically greater than 50mg / l, and the biological denitrification method is adopted. Due to the excessive treatment indicators and insufficient nutrients in sewage treatment plants, the removal rate is not high. Due to national and local The environmental protection department requires 100% compliance rate of sewage treatment, which often causes the total nitrogen in the effluent to fail to meet the discharge standard or the stability is not enough. Therefore, it is necessary to carry out subsequent advanced treatment of total nitrogen

Images