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Innocent treatment method for endotoxin-containing sludge in sewage treatment plant

A sewage treatment plant and harmless treatment technology, applied in the field of environmental pollution control, can solve problems such as high cost and secondary pollution, and achieve the effects of reducing endotoxin, good purification effect, and good killing effect

Active Publication Date: 2021-06-08
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, although a variety of sludge treatment and disposal methods have been developed, most of them have problems such as high cost and secondary pollution, so that there are few methods that can really be used for sludge treatment and disposal.

Method used

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  • Innocent treatment method for endotoxin-containing sludge in sewage treatment plant
  • Innocent treatment method for endotoxin-containing sludge in sewage treatment plant
  • Innocent treatment method for endotoxin-containing sludge in sewage treatment plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a method for harmless treatment of endotoxin-containing sludge in a sewage treatment plant is implemented according to the following steps:

[0028] Firstly, the crushing of magnesite is carried out, the coarse magnesite sand is collected, first crushed into particles with a particle size below 30mm by a jaw crusher, and then further crushed into small particles below 2mm by a double-roller crusher to obtain powdered magnesite ore; then collect the water-containing sludge, collect the sludge with a water content above 80% discharged from the sewage treatment plant, and place it in the mud-water adjustment tank; then add catalysts, add an amount equivalent to the mud-water mixture in the mud-water adjustment tank 2% magnesite sand, control the speed of frame mixer at 5 rpm, and continue to stir for 2 hours; add oxidant again, and slowly add potassium monopersulfate compound salt with a mass concentration of 15% equivalent to 0.5% of the volume ...

Embodiment 2

[0030] The anaerobic biochemical sludge of a municipal domestic sewage treatment plant in Beijing is disposed of with the method described in Example 1, and the results are as follows:

[0031]

[0032]

Embodiment 3

[0034] The anaerobic biochemical sludge of a coking plant sewage treatment plant in Xingtai City was disposed of with the method described in Example 1, and the results were as follows:

[0035] Concentration of pollutants Endotoxin (EU / g) Total number of bacteria (MPN / kg) Organic matter (%) before processing 6700 4.4×10 4

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Abstract

The invention relates to the technical field of sludge treatment, in particular to a harmless treatment method for sludge in an urban sewage treatment plant. The invention provides a sludge harmless treatment method which comprises the following steps of: firstly, fully mixing water-containing sludge with magnesite powder, adding potassium monopersulfate composite salt, fully aerating the sludge, introducing the sludge into a reactor with a UV-C ultraviolet lamp for continuous digestion, and finally dehydrating and drying the obtained clean sludge. The sludge harmless treatment method is simple in process, controllable in cost and thorough in harmless treatment, development and application of finally obtained clean sludge powder are facilitated, and the obtained sludge powder can be used for manufacturing cement, bricks, tiles, fertilizers and the like.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a method for harmless treatment of endotoxin-containing sludge in a sewage treatment plant. Background technique [0002] At present, the total amount of sewage treatment in my country is about 200 million tons per day, and the amount of wet sludge produced is roughly 200,000 tons per day, which is a huge output. Due to the long-standing phenomenon of heavy water and light mud in the water treatment industry, about 30 million tons of sludge produced in my country every year have not been properly disposed of. Most of these sludge come from biological sludge in the process of biochemical water treatment, potentially with A large amount of biological pollutants such as endotoxins, according to literature reports, workers who have been exposed to biochemical sludge or mud-water mixtures for a long time have a higher risk of endotoxin exposure, and improper dis...

Claims

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Application Information

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IPC IPC(8): C02F11/06C02F11/121C02F11/00C02F11/02
CPCC02F11/004C02F11/06C02F11/121C02F11/02C02F11/00C02F2303/04
Inventor 殷立峰代云容张圆正刘双段存戌
Owner BEIJING NORMAL UNIVERSITY
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