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Two-stage biological aerated filter and method for processing rural domestic wastewater

A biological aerated filter and domestic sewage technology, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor ammonia nitrogen nitrification effect and difficult to control operating conditions. Bacterial expansion and other problems, to achieve good operation management, realize the utilization of sludge resources, and good filtration effect

Inactive Publication Date: 2016-03-02
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of the existing single-stage biological aerated filter organic matter degradation and ammonia nitrogen nitrification in the same system, it is difficult to control the operating conditions, the expansion of filamentous bacteria and the poor effect of ammonia nitrogen nitrification, etc., the present invention provides a two-stage biological aerated filter System composition, and exhaust gas pre-aeration to strengthen the biological selector function, ammonia nitrogen and organic matter are separately cultivated, operated and managed and degraded and transformed into a biofilter, which is conducive to maintaining system stability, stable effect, simplified management and operating costs

Method used

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  • Two-stage biological aerated filter and method for processing rural domestic wastewater

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Embodiment 1

[0039] Such as figure 1 As shown, a two-stage biological aerated filter includes a regulating tank 1, a first-stage biological aerated filter 3, a bottom mud ceramsite layer 4, a second-stage biological aerated filter 5, and a tail gas utilization pipe 6 , fan 7 and backwash water pump 8, the adjustment tank 1 is connected to the bottom of the first section biological aerated filter 3 through a pipeline, one end of the pipeline is connected to the submersible pump 2 and placed in the adjustment tank 1, the first section biological aerated filter The upper part of 3 is connected to the lower part of the second-stage biological aerated filter 5 through pipelines, the fan 7 is respectively connected with the first-stage biological aerated filter 3 and the second-stage biological aerated filter 5 through pipelines, and the backwash water pump 8 Located in the regulating tank 1, it is connected to the first biological aerated filter 3 and the second biological aerated filter 5 thro...

Embodiment 2

[0049] Such as figure 1 As shown, a two-stage biological aerated filter includes a regulating tank 1, a first-stage biological aerated filter 3, a bottom mud ceramsite layer 4, a second-stage biological aerated filter 5, and a tail gas utilization pipe 6 , fan 7 and backwash water pump 8, the adjustment tank 1 is connected to the bottom of the first section biological aerated filter 3 through a pipeline, one end of the pipeline is connected to the submersible pump 2 and placed in the adjustment tank 1, the first section biological aerated filter The upper part of 3 is connected to the lower part of the second-stage biological aerated filter 5 through pipelines, the fan 7 is respectively connected with the first-stage biological aerated filter 3 and the second-stage biological aerated filter 5 through pipelines, and the backwash water pump 8 Located in the regulating tank 1, it is connected to the first biological aerated filter 3 and the second biological aerated filter 5 thro...

Embodiment 3

[0059] Such as figure 1 As shown, a two-stage biological aerated filter includes a regulating tank 1, a first-stage biological aerated filter 3, a bottom mud ceramsite layer 4, a second-stage biological aerated filter 5, and a tail gas utilization pipe 6 , fan 7 and backwash water pump 8, the adjustment tank 1 is connected to the bottom of the first section biological aerated filter 3 through a pipeline, one end of the pipeline is connected to the submersible pump 2 and placed in the adjustment tank 1, the first section biological aerated filter The upper part of 3 is connected to the lower part of the second-stage biological aerated filter 5 through pipelines, the fan 7 is respectively connected with the first-stage biological aerated filter 3 and the second-stage biological aerated filter 5 through pipelines, and the backwash water pump 8 Located in the regulating tank 1, it is connected to the first biological aerated filter 3 and the second biological aerated filter 5 thro...

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Abstract

The invention discloses a two-stage biological aerated filter and a method for processing rural domestic wastewater, and belongs to the field of biological purification treatment of domestic wastewater. The two-stage biological aerated filter comprises an adjusting tank, a first-stage biological aerated filter, a bottom mud ceramisite layer, a second-stage biological aerated filter, a tail gas utilization pipe, a draught fan, a back flush water pump and a back flush air pump. The ceramisite filled in the bottom mud ceramisite layer is prepared by mixing 65-75 wt% of bottom mud powder, 10-15 wt% of flour and 10-25 wt% of pulverized coal. According to characteristics of COD degrading bacteria and ammonia nitrogen transformation bacterium, proper operation conditions of each stage (dissolved oxygen DO, filter cycle) are set, and COD degradation and ammonia nitrogen transformation are respectively carried out in the two-stage biological aerated filters. The two-stage biological aerated filter of the invention has a simple structure, is reasonably set and is convenient to use.

Description

technical field [0001] The invention belongs to the field of domestic sewage biological purification treatment, and more specifically relates to a two-stage aerated biological filter and a method for treating rural domestic sewage. Background technique [0002] The amount and water quality of rural domestic sewage have gradually increased with the improvement of living standards, the expansion of handicraft workshops and livestock and poultry breeding, and the problems of rural water environment material and ecological damage have also emerged. Due to the needs of rural water environment protection, new Advanced sewage treatment technologies and methods are urgently needed. [0003] At present, in view of the relatively large land resources and low level of water treatment operation and management in rural areas, more ecological restoration technology projects are widely used, such as artificial wetland technology, land treatment technology, ecological restoration technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
Inventor 何欢曹文平孙成杨绍贵刘文杰许兴原
Owner NANJING UNIV
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