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Processing method for wastewater containing heavy metal chromium

A treatment method and technology for chromium wastewater, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high cost of activated carbon, limited use range, and difficulty in effectively removing chromium-containing wastewater. Heavy metals and other problems, to achieve the effect of low cost of raw materials

Inactive Publication Date: 2016-02-24
仇颖超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: in the process of treating heavy metals in chromium-containing waste water in the current traditional method, the physical and chemical method has relatively large pollution, and the medicament used may cause secondary pollution to the environment, while the cost of activated carbon adsorption method is relatively high, and the scope of application is limited , it is difficult to effectively remove heavy metals in chromium-containing wastewater, and a treatment method for heavy metal chromium-containing wastewater is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Firstly, take 5kg of river silt with a thickness of 8m, place it in a drier, and dry it at 60°C for 20 minutes so that the moisture content of the silt is 7%. 4cm thick river course silt, get the lower layer river course humus silt; Then the above-mentioned river course humus silt obtained is put into ceramic fermenter, and the massfraction that adds humus silt quality 10% is 35% hydrochloric acid solution wherein, and the quality of humus silt 3% glucose and 1% egg white, stir evenly, seal the mouth of the fermenter with a transparent film, raise the temperature to 38°C at the same time, seal and ferment for 10 days to make it acidified, and then take out the acidified humus sludge and put it in In the drier, after drying at 75°C for 30 minutes, move it into a mill and grind it into powder, then add 200g of sodium chloride, mix well, seal it and let it stand for 2 days, and carry out sodium treatment; then sodium chloride The last obtained humus sludge powder is sprink...

example 2

[0021]First, take 6.5kg of river silt with a thickness of 9cm, place it in a dryer, and dry it at 65°C for 20 minutes to make the moisture content of the silt 10%. The thick river silt of upper layer 5cm gets the lower layer of river humus silt; then the above-mentioned river channel humus silt obtained is put into a ceramic fermenter, and it is 35% hydrochloric acid solution that the massfraction of 13% of humus silt quality is added thereto, and humus silt Glucose with a mass of 4% and egg white of 1.5%, after stirring evenly, seal the mouth of the fermentation tank with a transparent film, raise the temperature to 50°C at the same time, seal and ferment for 12 days, make it acidify, then take out the humus sludge after acidification, put Put it into a dryer, dry it at 80°C for 30 minutes, move it into a mill and grind it into powder, then add 350g of sodium chloride, mix well, seal it and let it stand for 2.5 days, and carry out sodium treatment; then sodium The humus sludg...

example 3

[0024] First take 8kg of 10cm thick river silt, place it in a dryer, and dry it at 70°C for 20 minutes to make the moisture content of the silt 12%, then let it stand to cool to room temperature, and make it layer up and down, and then gently scrape off the upper layer 6cm thick river course silt, get lower layer river course humus silt; Then the above-mentioned river course humus silt obtained is put into ceramic fermenter, and the massfraction that adds humus silt quality 15% is 35% hydrochloric acid solution wherein, and the quality of humus silt 5% glucose and 2% egg white, stir evenly, seal the mouth of the fermenter with a transparent film, raise the temperature to 55°C at the same time, seal and ferment for 13 days, make it acidified, then take out the acidified humus sludge, put it in In the drier, after drying at 85°C for 30 minutes, move it into a mill and grind it into powder, then add 500g of sodium chloride, mix well, seal it and let it stand for 3 days, and carry ...

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Abstract

The invention discloses a processing method for wastewater containing heavy metal chromium, and belongs to the technical field of wastewater processing. The processing method comprises getting river humus sludge, adding hydrochloric acid for acidifying processing, then performing sodium modification processing, spreading the humus mud powder subjected to sodium modification processing into wastewater, uniformly mixing and performing centrifugation separation, so as to obtain a precipitate; mixing the precipitate with sludge in a secondary sedimentation tank in chemical-engineering sewage pools, then culturing a water plant India canna in the sludge mixture, so as to adsorb heavy metal chromium in the sludge through India canna root, wherein the heavy metal chromium is enriched at leaves through stem transportation; culturing the capability of India canna adsorbing heavy metal chromium, then removing the leaves and stems and keeping the roots, planting India canna into to-be-processed chromium-containing wastewater, and leaving India canna to natural grow and propagate and adsorb the heavy metal in wastewater. The embodiment proves that the method is unique, relatively low in cost, free of any chemical agents and free of harm to environment, and finally enables the removal rate of the heavy metal chromium in wastewater to be up to 95% or more.

Description

technical field [0001] The invention discloses a treatment method for wastewater containing heavy metal chromium, belonging to the technical field of wastewater treatment. Background technique [0002] Chromium-containing wastewater mainly comes from wastewater discharged from chromium-containing ore processing, electroplating, printing and dyeing, leather, chemical industry, and laboratories. Chromium mainly exists in the form of hexavalent and trivalent in water, which is highly toxic, and the toxicity of hexavalent chromium is much greater than that of trivalent chromium. It can invade the human body through air, drinking water, food or contact, causing skin erosion, Respiratory tract infection, anemia, and even carcinogenic effects. Chromium-containing wastewater discharged into the environment cannot be degraded, but can only change its form or transfer and accumulate, thus causing serious harm to the environment. Several serious chromium pollution accidents in 2003 w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/32
CPCC02F3/301C02F3/327C02F2101/22
Inventor 仇颖超张帆
Owner 仇颖超
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