Sewage double-biomembrane deep treatment technology

Abstract

The invention relates to a sewage double-biomembrane deep treatment technology comprising the steps: sewage enters an anaerobic tank, an anoxic tank and an oxygen maintaining tank after being pretreated by a grid and settled sand, and mud releases phosphorus in the anaerobic tank; the sewage is denitrified in a denitrification mode in the anoxic tank so as to remove most of organic matters; cilium biological fillers are arranged in the oxygen maintaining tank, biomembranes are attached to the cilium, absorb the phosphorus in excess and degrade the partial organic matters; the sewage enters a secondary sedimentation tank to carry out sedimentation treatment through the oxygen maintaining tank and then enters an aeration biological filter tank; granule biological fillers are arranged in the aeration biological filter tank, and the biomembranes are attached to granules, degrade the residual organic matters in the sewage and convert ammonia nitrogen into nitrate nitrogen; one part of the discharged water of the aeration biological filter tank flows back into the anoxic tank, and the other part is discharged; one part of the mud generated by the secondary sedimentation tank back flows into the anoxic tank, and the other part of the mud is discharged out of a system. The sewage double-biomembrane deep treatment technology has the advantages of investment saving, low operation cost, little land occupation and good treatment effect.

Description

technical field

[0001] The invention belongs to a sewage advanced treatment process in the field of environmental protection, in particular to a sewage dual-biofilm advanced treatment process for efficient nitrogen and phosphorus removal and resource utilization of sewage. Background technique

[0002] With the development of the national economy and society, the problem of water pollution in our country is increasing day by day, especially the shortage of water resources. my country's rivers, lakes and seas are generally polluted, 75% of the country's lakes are eutrophic to varying degrees; 90% of the urban waters are seriously polluted. Water pollution reduces the use function of water bodies and exacerbates the shortage of water resources. At present, my country is one of the 13 water-scarce countries in the world. About half of the more than 600 cities in the country are currently short of water. The aggravation of water pollution has made the shortage of water resource...

Examples

Embodiment Construction

[0016] As shown in Figure 1, the sewage enters the anaerobic tank after being pretreated by grille and sand in the pretreatment tank. Under anaerobic conditions, the adenosine triphosphate (ATP) in the phosphorus-accumulating bacteria undergoes hydrolysis to release H 3 PO 4 and energy to form adenosine diphosphate (ADP), which is the process of phosphorus release; after the sewage passes through the anaerobic pool, it flows into the anoxic pool by gravity. The nitrifying liquid of nitrogen is transported from the effluent of the biological aerated filter to the anoxic tank through the reflux pump; the sewage enters the oxygen holding tank after passing through the anoxic tank, and the oxygen holding tank is filled with ciliated fillers, which can increase the size of the reactor. Microbial biomass, thereby reducing the volume of the reaction tank in the oxygen holding section, effectively reducing the area occupied by sewage treatment; in the oxygen holding section, the disso...

technical field

[0001] The invention belongs to a sewage advanced treatment process in the field of environmental protection, in particular to a sewage dual-biofilm advanced treatment process for efficient nitrogen and phosphorus removal and resource utilization of sewage. Background technique

[0002] With the development of the national economy and society, the problem of water pollution in our country is increasing day by day, especially the shortage of water resources. my country's rivers, lakes and seas are generally polluted, 75% of the country's lakes are eutrophic to varying degrees; 90% of the urban waters are seriously polluted. Water pollution reduces the use function of water bodies and exacerbates the shortage of water resources. At present, my country is one of the 13 water-scarce countries in the world. About half of the more than 600 cities in the country are currently short of water. The aggravation of water pollution has made the shortage of water resource...

Examples

Embodiment Construction

[0016] As shown in Figure 1, the sewage enters the anaerobic tank after being pretreated by grille and sand in the pretreatment tank. Under anaerobic conditions, the adenosine triphosphate (ATP) in the phosphorus-accumulating bacteria undergoes hydrolysis to release H 3 PO 4 and energy to form adenosine diphosphate (ADP), which is the process of phosphorus release; after the sewage passes through the anaerobic pool, it flows into the anoxic pool by gravity. The nitrifying liquid of nitrogen is transported from the effluent of the biological aerated filter to the anoxic tank through the reflux pump; the sewage enters the oxygen holding tank after passing through the anoxic tank, and the oxygen holding tank is filled with ciliated fillers, which can increase the size of the reactor. Microbial biomass, thereby reducing the volume of the reaction tank in the oxygen holding section, effectively reducing the area occupied by sewage treatment; in the oxygen holding section, the disso...

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