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Autotrophic denitrification filter tank sewage treatment system

A sewage treatment system, autotrophic denitrification technology, applied in water/sludge/sewage treatment, anaerobic digestion treatment, water treatment parameter control, etc., can solve the problem of high operating costs of sewage treatment plants, and save carbon sources The effect of adding cost, reducing civil construction investment and high degree of automation

Active Publication Date: 2020-12-29
ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the sewage treatment project with low C / N ratio, after the secondary biochemical treatment, the carbon source in the effluent is seriously insufficient, but at this time the total nitrogen has not yet reached the discharge requirement, and a large amount of carbon source needs to be added to the denitrification filter To meet the requirements of heterotrophic denitrification bacteria denitrification, while the commonly used denitrification filters are all post-type filters, and additional carbon sources such as sodium acetate are required to ensure the denitrification, resulting in the entire sewage treatment plant high operating costs

Method used

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  • Autotrophic denitrification filter tank sewage treatment system

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Embodiment 1

[0023] Such as figure 1 As shown, an autotrophic denitrification filter sewage treatment system includes a filter denitrification control unit, which is characterized in that the filter denitrification control unit includes a water distribution channel 5, a sewage treatment filter 6 and a clear water pool 8 , the filter tank 6 is divided into a clear water area 61, an autotrophic filter material area 62, and a water and gas distribution area 63 from top to bottom, and the filter tank 6 is provided with a water inlet near the top of the clear water area 61, so Said 6 is provided with a water outlet near the bottom of the water distribution and gas distribution area 63, the water inlet is communicated with the water distribution canal 5 through a channel, the water outlet is communicated with the clear water pool 8 through a pipeline, and in the filter tank 6 A pneumatic gate e is provided on the channel where the water inlet communicates with the water distribution channel 5 , ...

Embodiment 2

[0029] Below in conjunction with the structure of the self-supporting denitrification filter sewage treatment system of the present invention in the embodiment 1, the workflow of the system is introduced as follows:

[0030] When the sewage flows through the water distribution channel 5 and the filter tank 6 is in normal filtering operation, open the water inlet pneumatic gate e and the water outlet third pneumatic valve c, close the first pneumatic valve a, the second pneumatic valve b and the fourth pneumatic valve d, and the sewage passes through The water distribution channel directly enters the filter tank 6 from the distribution channel 5, passes through the clear water layer 61, the self-supporting filter material layer 62, and the water distribution and air distribution layer 63 in the filter tank 6 in sequence, and discharges to the clear water tank from the third pneumatic valve c after treatment 8. The effluent discharges up to the standard;

[0031] The system is e...

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Abstract

The invention relates to the field of sewage treatment processes, in particular to an autotrophic denitrification filter sewage treatment system for treating sewage with a low C / N ratio. The system comprises a filter tank denitrification control unit, a filter material replacement alarm unit, a constant water level operation control unit, a nitrogen driving control unit and a backwashing control unit, wherein the height of an autotrophic filter material area of the filter tank denitrification control unit is 1.5-1.6 m, the filter tank denitrification control unit is filled with an efficient filter material with the stacking density of 0.85-0.90 g / cm < 3 >, the efficient filter material is formed by baking pyrite, iron powder, fly ash and clay in an oxygen-free condition at 400-500 DEG C, the particle size of the efficient filter material is 5-8 mm, the sphericity is 0.75-0.80, and the filter material denitrification load is 2.0 kgNO3-N / (m<3>.d). The autotrophic denitrification filter tank sewage treatment system is used for treating sewage with a low C / N ratio, does not need to add any organic carbon source, and has the characteristics of long backwashing period, long filter material operation period, low operation cost, small occupied area, civil engineering investment saving, high automation degree, simple operation, stable effluent and the like.

Description

technical field [0001] The invention relates to the field of sewage treatment technology, in particular to an autotrophic denitrification filter sewage treatment system for treating low C / N ratio sewage. Background technique [0002] Sewage is discharged into rivers, lakes and seas after being treated by sewage treatment plants. In order to improve the water environment quality of key river basins, the tail water of sewage treatment plants in various places has implemented one of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002). Grade A standard, even raised to Class IV and Class III water quality standards, and effluent total nitrogen is one of the key factors affecting effluent compliance. Sewage treatment plants mostly use activated sludge method for biological denitrification treatment, the total nitrogen in the secondary effluent is 12-20mg / L, and some sewage treatment plants have a larger fluctuation range. Due to the limited reside...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/28C02F2101/163C02F2303/14C02F2209/005Y02W10/10
Inventor 刘俊章长江闫珍张小庆高艳玲
Owner ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECH CO LTD