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Method for removing endocrine disrupter in sewage and sludge by using oxidation of calcium peroxide

A technology of endocrine disruptors and calcium peroxide, which is applied in the direction of oxidation treatment of sludge, oxidized water/sewage treatment, etc., can solve the problems of endocrine disruptors' environmental mobility and persistence enhancement, and achieve high oxidant utilization and applicable goals The effect of a wide range of substances and a simple and easy processing process

Active Publication Date: 2014-06-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the fate of endocrine disruptors in sludge is limited to a few sludge treatment processes such as alkali stabilization, sludge aerobic and anaerobic digestion, and composting. Stabilization, anaerobic digestion, centrifugal dehydration, freeze-thawing, ferric chloride conditioning, lime conditioning, polymer conditioning, etc. all failed to positively affect the solidification and removal of EDCs, and even resulted in environmental migration of EDCs Increased durability and durability
[0007] In summary, there is currently no economical and effective method for removing endocrine disruptors from sewage and sludge.

Method used

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  • Method for removing endocrine disrupter in sewage and sludge by using oxidation of calcium peroxide
  • Method for removing endocrine disrupter in sewage and sludge by using oxidation of calcium peroxide
  • Method for removing endocrine disrupter in sewage and sludge by using oxidation of calcium peroxide

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Effect test

Embodiment 1

[0029] First, calcium peroxide is used to oxidize and remove endocrine disruptors in sewage and sludge, prepare a 3mg / L endocrine disruptor solution, adjust the initial pH value to 7, add calcium peroxide 10g / L to the system, stir, and react for 0.25 -96h, the removal rate of six representative endocrine disruptors in different time see figure 1 . The removal rate of the target substances increased with the prolongation of the reaction time. After 96 hours of reaction, the removal rates of the six target substances all reached more than 70%.

Embodiment 2

[0031] According to the operation steps of the above-mentioned Example 1, the initial pH is treated with 10g / L calcium peroxide containing 3mg / L endocrine disruptor sewage from 2 to 12, and the removal rate of the target substance after 96h of reaction is shown in figure 2 . The removal rate of the target substance did not change much with the pH, and the removal rate was higher under acidic and neutral conditions. The removal rate of the six target substances reached more than 70% under different pH conditions.

Embodiment 3

[0033] According to the operation steps of the above-mentioned embodiment 1, the initial pH is 2-12 with the calcium peroxide treatment of 10g / L the concentrated sludge of a certain sewage treatment plant in Shanghai containing 1mg / L endocrine disruptor, the removal rate of reaction 4d target sees image 3 . The removal rate of the target substance is higher under the conditions of strong acidity and strong alkalinity, and the removal rate of the target substance under different pH conditions is basically more than 60%.

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Abstract

The invention relates to a method for removing endocrine disrupter in sewage and sludge by using oxidation of calcium peroxide, which comprises the following steps: adding 0.5-10g / L of a calcium peroxide solid in the sewage or sludge containing endocrine disrupter, reacting for 0.25 hours-7 days, stirring, and oxidizing to remove the endocrine disrupter. Compared with prior art, the method for removing endocrine disrupter in sewage and sludge by using oxidation of calcium peroxide has the advantages of simple reaction condition, easy operation, wide scope of appropriate environment medium, good processing effect, mild reaction, low processing cost, no secondary pollution, and large application prospect for industrialization.

Description

technical field [0001] The invention relates to the treatment of environmental media containing endocrine disruptors, in particular to a method for oxidizing and removing endocrine disruptors in sewage and sludge by using calcium peroxide. Background technique [0002] Endocrine disruptors refer to a class of exogenous compounds that, after entering the body, will interfere with the synthesis, release, movement, metabolism, and combination of normal secreted substances in the body, activate or inhibit the function of the endocrine system, and destroy the maintenance of endocrine system. Substances that stabilize and regulate the body interfere with many aspects of the human or animal endocrine system, leading to abnormal effects. [0003] The list of endocrine disruptors in the natural environment is long and includes natural and synthetic estrogens, plant or fungal estrogens, metabolites of alkylphenol ethoxylates (APEOs), organochlorine pesticides, bisphenol A (BPA) , pol...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F11/06
Inventor 李咏梅张艾
Owner TONGJI UNIV