Decarburization, denitrification and dephosphorization deep treatment system and method

Abstract

The invention discloses a decarburization, denitrification and dephosphorization deep treatment system. The decarburization, denitrification and dephosphorization deep treatment system comprises an anaerobic biological filter, a denitrification biological filter, a carburization biological filter and a nitrification biological filter which are connected in sequence, wherein the anaerobic biological filter is provided with a water inlet pipe; the nitrification biological filter is provided with a water outlet pipe. The carburization biological filter is connected to the anaerobic biological filter through a first mixed solution reflowing pipe in a returning manner; the nitrification biological filter is connected to the anaerobic biological filter through a second mixed solution reflowing pipe in the returning manner; the nitrification biological filter is connected to the denitrification biological filter through a nitrification mixed solution reflowing pipe in the returning manner; the water inlet pipe of the anaerobic biological filter is connected to the denitrification biological filter through overstepping the water inlet pipe; the denitrification biological filter is provided with a primary sedimentation output water leading-in pipe connected with output water of a primary sedimentation tank. The system and the method disclosed by the invention are multi-combination, synchronous and interactive type decarburization, denitrification and dephosphorization deep treatment system and method, which have the advantages of high anti-impact load, high partitioning function, high treatment capability, short process flow, small occupied area and good treatment effect.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to an advanced treatment system and method for decarbonization, nitrogen, and phosphorus removal suitable for advanced treatment of sewage. Background technique [0002] With the acceleration of my country's urbanization process, the urban population has increased rapidly, the existing sewage treatment scale and effluent water quality cannot meet the needs of urban construction, water pollution has become increasingly serious, excessive discharge of nitrogen and phosphorus has caused eutrophication of water bodies, and rivers and lakes are growing day by day Chlorella seriously affects human health and safety. [0003] According to the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) (Table 1-2), when the effluent of sewage treatment plants is introduced into rivers and lakes with small dilution capacity for urban landscape water and general reuse w...

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Problems solved by technology

[0009] Based on the existing problems in the prior art, the object of the present invention is to provide a system and method for advanced treatment of decarburization, denitrification and phosphorus removal, which is suitable for advanced treatment of sewage, improves the quality of effluent, and makes the effluent comply with the "Urban Sewage Treatment Plant Pollutants "Discharge Standard" Class A Standard or Class VI Water Body Standard, to solve the problems of the existing advanced treatment process sewage, such as a large proportion and poor biochemical properties

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