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Method for measuring sand content of sludge

A technology of sand content and sludge, applied in the field of detection, to achieve the effect of safe and simple experiment, mild condition and low cost

Inactive Publication Date: 2017-08-22
青岛水务集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has simple steps, low technical requirements for testing personnel, accurate and stable results, and solves the gap in the current method for the determination of sand content in urban sludge in my country.

Method used

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  • Method for measuring sand content of sludge
  • Method for measuring sand content of sludge
  • Method for measuring sand content of sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for measuring the sand content of sludge, comprising the steps of:

[0041] (1) Sludge pretreatment: Dry the sludge produced by the sewage treatment plant and measure its moisture content; among them, during the sludge pretreatment, the operator wears a mask to operate.

[0042] (2) Burning: Accurately weigh the dried sludge and burn it in a muffle furnace to constant weight.

[0043] (3) Reaction: Add concentrated hydrochloric acid to the sludge burned to constant weight, and heat in a water bath for reaction. Wherein, the temperature of the water bath is 80° C., and the time of the water bath is 10 min.

[0044] (4) Filtration: filter the reacted solution with quantitative filter paper, and fully wash the filter residue with deionized water.

[0045] (5) Burn again: put the filter residue and the quantitative filter paper in a muffle furnace and burn to constant weight to obtain pure sand.

[0046] (6) Calculation: The sand content of the sludge is obtaine...

Embodiment 2

[0048] A method for measuring the sand content of sludge, comprising the steps of:

[0049] (1) Sludge pretreatment: Dry the sludge produced by the sewage treatment plant and measure its moisture content; among them, during the sludge pretreatment, the operator wears a mask to operate.

[0050] (2) Burning: Accurately weigh the dried sludge and burn it in a muffle furnace to constant weight.

[0051] (3) Reaction: Add concentrated hydrochloric acid to the sludge burned to constant weight, and heat in a water bath for reaction. Wherein, the temperature of the water bath is 100° C., and the time of the water bath is 15 minutes.

[0052] (4) Filtration: filter the reacted solution with quantitative filter paper, and fully wash the filter residue with deionized water.

[0053] (5) Burn again: put the filter residue and the quantitative filter paper in a muffle furnace and burn to constant weight to obtain pure sand.

[0054] (6) Calculation: Obtain the sand content of the sludge ...

Embodiment 3

[0056] A method for measuring the sand content of sludge, comprising the steps of:

[0057] (1) Sludge pretreatment: Dry the sludge produced by the sewage treatment plant and measure its moisture content; among them, during the sludge pretreatment, the operator wears a mask to operate.

[0058] (2) Burning: Accurately weigh the dried sludge and burn it in a muffle furnace to constant weight.

[0059] (3) Reaction: Add concentrated hydrochloric acid to the sludge burned to constant weight, and heat in a water bath for reaction. Wherein, the temperature of the water bath is 90° C., and the time of the water bath is 12 minutes.

[0060] (4) Filtration: filter the reacted solution with quantitative filter paper, and fully wash the filter residue with deionized water.

[0061] (5) Burn again: put the filter residue and the quantitative filter paper in a muffle furnace and burn to constant weight to obtain pure sand.

[0062] (6) Calculation: Obtain the sand content of the sludge...

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Abstract

The invention relates to a method for measuring sand content of sludge. The method comprises the following steps of drying sludge generated by a sewage treatment plant and measuring water content of the sludge; accurately weighing the dried sludge and burning in a muffle surface to constant weight; adding concentrated acid into the sludge which is burned to constant weight and heating in water bath to react; filtering a reacted solution through quantitative filter paper and fully washing filter residue clean through deionized water; putting the filter residue and the quantitative filter paper into the muffle furnace to be burned to constant weight to obtain pure sand; obtaining the sand content of the sludge through calculation. The method can quickly and accurately measure the sand content in the sludge, provides theoretical basis for urban sludge treatment and has wide application prospect in the fields of environmental protection, solid waste treatment and utilization and the like; the method is safe and simple and has moderate conditions and accurate and stable data; an operation process is easy to control; furthermore, a technological requirement is not high; the method is suitable for accurately measuring the sand content in the sludge for a long time.

Description

technical field [0001] The invention relates to the field of detection methods, in particular to a method for measuring the sand content of sludge. Background technique [0002] The sewage of urban sewage treatment plants often carries a certain amount of sand particles, most of which are deposited in the grit chamber, and a small part will eventually enter the sludge. If the sand particles in the sludge are not effectively removed, it may have many impacts on the operation of subsequent treatment units: not only will it aggravate the sludge scraper in the primary sedimentation tank of the sewage treatment plant, the sludge pump impeller and the sludge dehydration The wear and tear of equipment such as machines, and it is easy to cause the blockage of the sludge discharge pipe; the deposition of sand particles in the biochemical tank will reduce the effective volume of the biochemical tank and have an adverse effect on the aerator; the sand particles entering the sludge dige...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 孙伟香李淑栋李慧王贤
Owner 青岛水务集团有限公司
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