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Method for judging hydrogen sulfide content stability in excess sludge

A technology for excess sludge and hydrogen sulfide, applied in the field of detection, can solve problems such as research on hydrogen sulfide content in excess sludge, achieve the effects of hydrogen sulfide pollution control, simple operation, and accurate measurement results

Active Publication Date: 2020-04-03
BEIJING DRAINAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many methods for the determination of hydrogen sulfide on the market, but most of them are to detect whether the hydrogen sulfide in the workshop air and ambient air of the sewage treatment plant exceeds the standard. There is no research on the hydrogen sulfide content in the excess sludge. content, can accurately control the operation of the deodorization device of the sewage treatment plant, and reduce the waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The hydrogen sulfide in the remaining sludge in the sludge treatment workshop A of a sewage treatment plant was detected.

[0047] Step 1. Sample collection: Before sample collection, it is necessary to make sure that the sludge treatment workshop of the sewage treatment plant is in normal operation. Use a special frozen sampling tank for sampling, take fresh excess sludge, divide the sample into nine parts according to the principle of equal division during the sampling process, take the middle part of the sample as the experimental sample, and store the experimental sample at low temperature in the sampling tank; After sampling, at the same sampling point, a sample was taken every 3 hours, and a total of two samples were taken.

[0048]Step 2. Establishment of the standard curve: Use a certain concentration of hydrogen sulfide standard gas to configure the following concentrations of standard gas: 0mg / L, 0.2mg / L, 0.4mg / L, 0.6mg / L, 0.8mg / L, 1mg / L L, use gas chromatogr...

Embodiment 2

[0053] The hydrogen sulfide in the remaining sludge in the sludge treatment workshop A of a sewage treatment plant was detected.

[0054] The difference from Example 1 is that in Step 1, samples are taken every 5 hours.

[0055] Following the standard curve of Example 1, the first sampling result is 0.37mg / L, the second sampling result is 0.36mg / L, the second measurement result is slightly lower than the first sampling result, but the difference Not much, indicating that the hydrogen sulfide content in the remaining sludge is relatively stable in different time periods.

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Abstract

The invention discloses a method for judging the content stability of hydrogen sulfide in excess sludge. The method mainly comprises the following steps: sample collection, establishment of a standardcurve, sample pretreatment, gas phase determination and data processing. Fresh excess sludge is taken, a sample is divided into nine parts according to the equal division principle in the sampling process, the middle part of the sample is taken as an experimental sample, and the experimental sample is stored in a sampling tank at low temperature. The same sampling point is sampled for multiple times (such as three times), the concentration change of the same sampling point at different time is measured, data guidance can be provided for hydrogen sulfide in the residual sludge of the sewage treatment plant, and the hydrogen sulfide pollution of the residual sludge of the sewage treatment plant is effectively treated.

Description

technical field [0001] The invention belongs to the technical field of detection, and more specifically relates to a method for judging the stability of hydrogen sulfide content in excess sludge. Background technique [0002] Hydrogen sulfide is an acute poison, and inhalation of a small amount of high-concentration hydrogen sulfide can be fatal in a short time. Low concentrations of hydrogen sulfide have effects on the eyes, respiratory system and central nervous system. Hydrogen sulfide is extremely soluble in organic amines. It also has high solubility in caustic alkali solution. Combustion in excess oxygen produces sulfur dioxide and water, and produces water and free sulfur when the oxygen supply is insufficient. Stable at room temperature. Soluble in water, the aqueous solution has weak acidity, and it will gradually become cloudy due to oxidation and precipitation of sulfur when it contacts with air. Can burn in the air to produce blue flame and generate SO 2 an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88G01N30/16G01N1/10
CPCG01N30/88G01N30/16G01N1/10G01N2030/8859Y02W10/10
Inventor 陈刚新王国安卢紫欣李魁晓吴从从
Owner BEIJING DRAINAGE GRP CO LTD
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