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Method for controlling nitrogen release in deep denitrification filter bed

A denitrification filter and release control technology, applied in anaerobic digestion treatment, etc., can solve the problems of increasing energy consumption, increasing backwash water consumption, shortening filtration cycle, etc., to reduce energy consumption, improve operating efficiency, and prolong filtration cycle effect

Active Publication Date: 2014-12-10
JIANGSU YOULIAN ENVIRONMENTAL DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nitrogen release interval is set to a fixed value and cannot be adjusted due to changes in the flow rate or influent nitro-nitrogen concentration, resulting in head loss or premature recovery of the filter bed, increasing energy consumption; or failing to recover in time, increasing energy consumption and shortening Filtration cycle, increase backwash water consumption

Method used

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  • Method for controlling nitrogen release in deep denitrification filter bed
  • Method for controlling nitrogen release in deep denitrification filter bed
  • Method for controlling nitrogen release in deep denitrification filter bed

Examples

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Embodiment Construction

[0021] The key control factors of the total head loss control nitrogen release process are: (a) the head loss on-line detection instrument (15) participates in the nitrogen release control; (b) the head loss on-line detection instrument 15 does not participate in the gas-water recoil control, by calculating SS and The accumulation of biological sludge is compared with the maximum accumulation load to control the air-water recoil.

[0022] Nitrogen release process:

[0023] The measured value of head loss online detection instrument 15 is greater than or equal to the set value, and the nitrogen release program is started

[0024] Close the water inlet valve 6 and the water outlet valve 12

[0025] Open the recoil water inlet valve 13 and start the recoil water pump 14

[0026] ·Water recoil for 30-90 seconds

[0027] Close the recoil water pump 14 and the recoil water inlet valve 13

[0028] Open the outlet valve 12

[0029] Open the water inlet valve 6

[0030] Air water...

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Abstract

The invention discloses a nitrogen release technology applied to a deep denitrification filter bed process for sewage treatment. According to the technology, the maximal head loss caused by suspended solids, biological sludge and nitrogen accumulated in a filter bed within a nitrogen release interval period is set to be a fixed value delta Hmax by a total head loss control nitrogen release technology; the value is input into a control system; and when a head loss measurement parameter of the filter bed in the filtration and denitrification processes rises to the delta Hmax, nitrogen release is started. According to the nitrogen release technology in the scheme, gas-water full recoiling is controlled by heat loss experience curve or time generated when filter bed intercept suspended solids. The nitrogen release technology carries out parameter correction by increasing the suspended solids and the biological sludge to cause head loss, can dynamically simulate the process of accumulating nitrogen and then releasing nitrogen in the filter bed, can accurately judge each nitrogen release period, can prolong the filter period of the filter bed, can reduce the nitrogen release frequency of the filter bed, and can lower energy consumption and water consumption in operation of the filter bed.

Description

technical field [0001] The invention is applied to the deep bed denitrification filter of the sewage treatment plant, and mainly improves the service performance of the deep bed denitrification filter by optimizing the nitrogen release technology. Background technique [0002] Deep bed denitrification filter is often used as denitrification denitrification and filtration process in advanced treatment of sewage treatment plant. In the process of denitrification, microorganisms use carbon sources in anoxic environment to convert nitrate nitrogen into nitrogen gas. Nitrogen gas molecules form bubbles through collisions, occupying the gap between filter materials, so that the head loss of the filter bed increases rapidly, and it needs to be released regularly to restore the filter bed Filtration capacity. [0003] The nitrogen release method of the deep bed denitrification filter is to use a certain strength of water to recoil the filter material layer, and the water flow pulls...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 霍祥明周国栋张效刚钱健赵锦辉翟鹏翔宋建峰李建华
Owner JIANGSU YOULIAN ENVIRONMENTAL DEV
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