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Biological two-stage aeration filter pool and water distribution and air distribution method of pool body

A technology of aeration biological filter and biological filter, which is applied in the field of sewage treatment and can solve the problems of increasing energy consumption and the like

Active Publication Date: 2014-02-26
NINGXIA BAOTA PETROCHEM GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the addition of denitrification tanks, the biological aerated filter is increased to a three-stage biological aerated filter, and a pump lifting process is required to increase energy consumption

Method used

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  • Biological two-stage aeration filter pool and water distribution and air distribution method of pool body
  • Biological two-stage aeration filter pool and water distribution and air distribution method of pool body
  • Biological two-stage aeration filter pool and water distribution and air distribution method of pool body

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Experimental program
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Effect test

Embodiment 1

[0030] The treated water volume is 300m 3 / h, raw water: COD 150mg / L, NH 3 -N 50mg / L, SS 150mg / L, TN 60mg / L, pH 6-9. Choose 8 biological aerated filters, 4 for each level, used in parallel, the structure of the first-level tank body is 6.0×6.0×5.5m, the structure of the second-level tank body is 6.0×6.0×4.5m, and the height of the first-level tank is 4.5m m, the second level is 3.5m, and the air distributor is installed at the 2100mm section. If the COD concentration of the raw water is low and the ammonia nitrogen concentration is high, the installation section of the secondary air distributor can be appropriately moved up according to the denitrification load.

Embodiment 2

[0032] The treated water volume is 500m 3 / h, raw water: COD 150mg / L, NH 3 -N 50mg / L, SS 150mg / L, TN 60mg / L, pH 6-9. Choose 8 biological aerated filters, 4 for each level, used in parallel, the structure of the first-level tank is 8.0×8.0×6.0m, the structure of the second-level tank is 8.0×8.0×5.0m, and the height of the first-level tank is 5.0m m, the second level is 4.0m, and the air distributor is installed at a section of 2500mm. If the COD concentration of the raw water is low and the ammonia nitrogen concentration is high, the installation section of the secondary air distributor can be appropriately moved up according to the denitrification load.

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Abstract

The invention relates to a biological two-stage aeration filter pool and a water distribution and air distribution method of a pool body. In the biological two-stage aeration filter pool, biological aeration filter pools in two stages totally comprise 8 pool bodies; and each stage comprises four pool bodies; the first-stage pool bodies and the second-stage pool bodies are arranged in the form of steps; the building structures are in the form of two parallel rows; in each row, two first-stage pool bodies and two second-stage pool bodies are arranged; a sealed public pipe rack is arranged in the middle; and water distribution, air distribution, backwash water distribution and backwash air distribution pipelines are laid in the pipe rack, so as to respectively provide inlet water, inlet air, backwash inlet water and backwash inlet air to each pool; and according to the invention, the number of the pool bodies is reduced, the air distribution position of the biological two-stage aeration filter pool is improved, and carbonizing, nitrating and denitrifying functions are effectively finished in the same pool body.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for distributing water and air in a secondary aerated biological filter tank and a tank body. Background technique [0002] Due to the increase in the requirements for the discharge of sewage indicators, most sewage treatment plants in China have introduced the new technology of biological aerated filters to ensure that the level of discharged sewage reaches the standard. The construction of biological aerated filters has square, rectangular and circular building structures, while the water , air distribution, backwash water distribution, and backwash air distribution methods. [0003] The biological aerated filter has reverse contact, that is, the water distribution is downstream, and it is in reverse contact with the air distribution. Because the concentration of dissolved oxygen at the bottom of the filter is relatively high, and the concentration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
Inventor 孔德林王铁汉杨转红杨晓丽刘涛刘志强
Owner NINGXIA BAOTA PETROCHEM GROUP