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A Quantitative Method for Adding Chemical Reagents for Old Sludge Conditioning

A technology of chemical reagents and quantitative methods, applied in the field of environmental geotechnical engineering, can solve the problems of inaccurate calculation of chemical reagent usage, poor dehydration effect, and increased economic cost, saving time and workload, avoiding improper design, The effect of improving efficiency

Active Publication Date: 2021-08-10
武汉中科固废资源产业技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to make up for the deficiencies in the prior art, the present invention provides a quantitative method for adding chemical reagents for old sludge conditioning, which can solve the problem of inaccurate calculation of the appropriate amount of chemical reagents used in old sludge and avoid adding reagents. Insufficient or wasteful results in poor dehydration or invalid increase in economic costs

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  • A Quantitative Method for Adding Chemical Reagents for Old Sludge Conditioning
  • A Quantitative Method for Adding Chemical Reagents for Old Sludge Conditioning
  • A Quantitative Method for Adding Chemical Reagents for Old Sludge Conditioning

Examples

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Effect test

Embodiment 1

[0045] This example is a quantification method that combines multiple indicators of old sludge and mud as the benchmark for reagent addition. In the case of improving the specific resistance of old mud to the same degree, it is compared with the quantification method of organic matter content and dry basis content alone as the benchmark for reagent addition. ,Proceed as follows:

[0046] S1: Select two kinds of old municipal sludge No.1 and No.5 as objects, and collect the original sludge moisture content No.1 75.71±0.58% and No.2 84.53±0.35%. The original sludge is stirred with water, and resuspended into a pumpable fluid state whose water content accounts for 93.16±0.14% of the total mass of the mud. Test mud organic matter content VS / TS, Malvern laser particle size analyzer wet method to measure mud particle size, low particle size value D at 1000rpm stirring speed 10 , centrifuge 40.0 grams of mud under the condition of 2000 gravitational acceleration for 15 minutes, coll...

Embodiment 2

[0058] This example is a quantification method that combines multiple indicators of old sludge and slurry as a benchmark for reagent addition. When dealing with old sludge with different physical and chemical properties, the influence of the previous response surface test procedure on the prediction of reagent dosage is considered. The steps are as follows:

[0059] S1: Select five kinds of old municipal sludge No.1, No.5, No.2, No.8, No.3 as the object, add water to the original sludge and stir it, and resuspend it so that the water content accounts for 93.16±0.14% of the total mass of the sludge The pumpable flow state mud. Test the organic matter content of the mud, measure the mud particle size with the Malvern laser particle size analyzer wet method, and the low particle size value D at the stirring speed of 1000rpm 10 , the mass of water in the sediment per unit mass of dry matter after centrifugation under the acceleration of gravity of 2000 M T , and the average value...

Embodiment 3

[0069] This example is a quantification method that combines multiple indicators of old sludge and mud as the benchmark for reagent addition, treats old sludge with similar physical and chemical properties, and obtains the effect verification of reagent addition for treating old sludge. The steps are as follows:

[0070] S1: Select an old municipal sludge A1 object, and collect the original sludge with a moisture content of 83.21±0.38%. The original sludge is stirred with water, and resuspended into a pumpable fluid state whose water content accounts for 93.16±0.14% of the total mass of the mud. The organic matter content of the test mud is 33.56±0.28%, the particle size of the mud is measured by the wet method of the Malvern laser particle size analyzer, and the volume low particle size value D at the stirring speed of 1000rpm 10 11.23±0.9μm, after centrifugation under the acceleration of gravity of 2000, the water content per unit dry matter mass of the sediment M T It is 4...

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Abstract

The invention discloses a chemical reagent addition quantification method for old sludge conditioning, comprising the following steps: 1) after resuspending at least one kind of old sludge, carry out organic matter content VS / TS, volume low particle diameter D 10 and centrifuged sediment water content M T Test; 2) Carry out chemical conditioning and filtration response surface tests of at least one kind of old sludge, and search for the optimal addition mass combination of mud chemical reagents through tests and analysis; 3) Convert the optimal addition mass of the reagents found in step 2) to obtain Mud (VS / TS÷D 10 )×M T The corresponding normalized value, or the optimal addition of reagents and the corresponding mud (VS / TS÷D 10 )×M T The values ​​were subjected to least squares linear regression. Other old sludge is processed and tested according to step 1), and the weight of reagents added to other old sludge is calculated by using the obtained normalized value or linear regression equation. The invention can adapt to the chemical oxidation conditioning of various old sludge with complex physical and chemical properties.

Description

technical field [0001] The invention relates to the technical field of environmental geotechnical engineering, in particular to a quantitative method for adding chemical reagents for old sludge conditioning. Background technique [0002] Sanitary landfill is the main disposal method for excess sludge in sewage treatment plants in my country, and landfill disposal accounted for 60% of the total in the past. Although the surplus sludge with increasing output has been dehydrated and landfilled hygienically, land resources are limited, and the landfill still occupies a large amount of precious land resources. The ecological, industrial and commercial environments around the landfill are greatly affected, especially in the Areas with high ecological environment requirements and relatively scarce land resources. Therefore, in order to improve the capacity of landfills and repair irregular and obsolete landfill pits, it is of great significance to explore the secondary deep dehydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/06
CPCC02F11/06
Inventor 陈亿军谭洵何星星张少华王平陈新惠心敏喃万勇刘磊李江山
Owner 武汉中科固废资源产业技术研究院有限公司
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