Back flush method of anaerobic ammoxidation biological filter
An anammox and biological filter technology is applied in the field of anammox biological filter blockage and the backwash strategy proposed for this problem, which can solve problems such as anammox filter blockage and achieve simple parameters. The effect of easy measurement, sensitive response, accurate and rapid indication
Active Publication Date: 2014-04-02
BEIJING UNIV OF TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The present invention aims to provide a complete set of backwashing methods suitable for anaerobic ammonium oxidation biological filter, determine the indication method of backwashing period, the control method of backwashing, the evaluation method of backwashing, and solve the clogging of anaerobic ammonium oxidation filter question
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0023] The reactor used in the test is an upflow volcanic rock biofilter, and the anaerobic ammonium oxidation reaction has been successfully started, and the average total nitrogen removal load has reached 1.25kgN / m 3 / d, the diameter of the reactor is 0.5m, the height is 2.0m, and the average particle size of the volcanic rock is 10cm. A pressure gauge is installed at the water inlet of the reactor to monitor the water head of the piezometric pipe at the water inlet.
[0024] At the beginning of this experiment, the influent flow rate of the reactor was 3700mL / min. At this time, the total nitrogen removal load of the biofilter did not exceed 0.1kgN / m for 5 consecutive days. 3 / d, maintained at 1.25±0.01kgN / m 3 / d, and the difference between the maximum value and the minimum value of the piezometer head at the water inlet end is less than 5%, so the average head of the piezometer pipe at the water inlet end during these 5 days is 0.012MPa as the initial piezometer head of the ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides a back flush method of an anaerobic ammoxidation biological filter, belongs to the field of urban domestic sewage treatment and regeneration and particularly relates to the problem on blockage of an anaerobic ammoxidation biological filter and a back flush strategy provided for solving the problem. In order to solve the problem on blockage of a biological filter which typically comprises volcanic rock and other hard fillers in the operating process, the invention provides a whole back flush method applicable to an anaerobic ammoxidation biological filter, which comprises the following steps: by taking the piezometric head at a water inlet end as an indicating parameter of a back flush period, and performing back flush when the ratio of the piezometric head at the water inlet end to an initial piezometric head is greater than or equal to 2; performing back flush in a gas-water combined manner, and sequentially performing gas flush, gas-water flush and water flush; and regulating the back flush strength and time according to the restorability of the filter subjected to back flush, and giving a back flush parameter regulation method. The back flush mode effectively solves the problem on blockage of an anaerobic ammoxidation biological filter in the operating process, and provides a theoretical support for the application thereof in practical projects.
Description
technical field [0001] The invention belongs to the field of urban domestic sewage treatment and regeneration, and specifically relates to the clogging problem of anaerobic ammonium oxidation biological filter tanks and the backwashing strategy proposed for this problem. Background technique [0002] Since the reform and opening up, China has made remarkable achievements in the economic field. However, as the economy takes off, environmental problems represented by water pollution have gradually become prominent and have become an important factor restricting China's further development, directly related to the sustainable development of economy, ecology and human beings. Since 1991, the state has issued the China Environmental Bulletin every year. For 22 years, major lakes in my country have been plagued by eutrophication caused by nitrogen and phosphorus. Surface water and groundwater have also been polluted and threatened by nitrogen and phosphorus. The overall situation ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
Inventor 李冬李德祥吴迪梁瑜海王斌高伟楠杨胤何永平张翠丹张玉龙吴青周元正苏庆岭门绚曾辉平张杰
Owner BEIJING UNIV OF TECH