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Method for treating wastewater containing high-concentration organic matters and inorganic salts

A treatment method and organic matter technology, which is applied to the treatment of inorganic salt wastewater and high-concentration organic matter, can solve the problems of polluted water environment and high treatment costs, and achieve less environmental pollution, high resource recycling rate, and high economic benefits. Effect

Active Publication Date: 2014-09-24
DONGGUAN SANRENXING ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Whether it is advanced treatment of high-concentration wastewater produced by membrane filtration or other methods, if it is not properly treated, it will inevitably cause excessive discharge and pollute the water environment.
At present, there is no low-cost treatment method for high-concentration wastewater containing organic matter such as oil and inorganic salts. Usually, it needs to be concentrated through multiple evaporations and reverse osmosis. The liquid evaporates completely, but this will inevitably cause extremely high treatment costs. Therefore, the industry urgently needs to provide a treatment method that can effectively treat wastewater containing high concentrations of organic and inorganic salts

Method used

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  • Method for treating wastewater containing high-concentration organic matters and inorganic salts

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Embodiment 1

[0036] A method for treating wastewater containing high concentrations of organic matter and inorganic salts, comprising the following steps:

[0037] Step A, introducing high-concentration organic matter and inorganic salt wastewater into a filter for filtration, removing particulate matter in the wastewater, and obtaining a filtrate; the high-concentration organic matter and inorganic salt wastewater contains COD 1000 mg / L, and the ratio of BOD to COD is 0.01 , the pH is 5, the wastewater salt content is 1%, and the ammonia nitrogen content is 1000mg / L;

[0038] Step B, introducing the filtrate into a reverse osmosis membrane device for treatment to obtain produced water and high-concentration organic matter and inorganic salt concentrated water, and the produced water is directly recycled; the permeable membrane in the reverse osmosis membrane device is an SRO membrane;

[0039] Step C, introducing high-concentration organic matter and inorganic salt concentrated water into...

Embodiment 2

[0046] The difference between this embodiment and Embodiment 1 is that step E of this embodiment also includes a temperature-raising process, the medium-concentrated water after oil removal is first introduced into the condenser, and the medium-concentrate water after oil removal is heated to increase the temperature. Concentrated water, and then the heated concentrated water is introduced into the evaporator to obtain crystalline solid powder and mixed gas.

[0047] The rest of this embodiment is the same as Embodiment 1, and will not be repeated here.

Embodiment 3

[0049] A method for treating wastewater containing high concentrations of organic matter and inorganic salts, comprising the following steps:

[0050] Step A, introduce high-concentration organic matter and inorganic salt wastewater into a filter for filtration, remove particulate matter in the wastewater, and obtain a filtrate; the high-concentration organic matter and inorganic salt wastewater contains COD 1500mg / L, and the ratio of BOD to COD is 0.05 , the pH is 7, the salinity of the wastewater is 2%, and the ammonia nitrogen content is 1300mg / L;

[0051] Step B, introducing the filtrate into a reverse osmosis membrane device for treatment to obtain produced water and high-concentration organic matter and inorganic salt concentrated water, and the produced water is directly recycled; the permeable membrane in the reverse osmosis membrane device is an SRO membrane;

[0052] Step C, introducing high-concentration organic matter and inorganic salt concentrated water into the ...

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Abstract

The invention relates to the technical field of sewage treatment and in particular relates to a method for treating wastewater containing high-concentration organic matters and inorganic salts. The method comprises the following steps: feeding the wastewater into a filter and a reverse osmosis membrane device for treatment, thus obtaining produced water and concentrated water; feeding the concentrated water into a struvite reactor and then adding a proper quantity of magnesium salt, MgO and phosphates to the struvite reactor, thus obtaining an agricultural fertilizer and medium concentrated water; feeding the medium concentrated water into a graphene adsorption tower for adsorption filtration, thereby removing organic matters such as oil contamination; feeding the medium concentrated water with oil contamination removed into an evaporator to obtain a crystalline slid powder and mixed gases; feeding the mixed gases into a gas membrane separator for separation, thus obtaining pure water and thickened mixed gases; feeding the thickened mixed gases into a condenser for condensation treatment, thus obtaining water and non-condensable gases; feeding the non-condensable gases into a microwave ultraviolet catalytic reactor for decomposition, thus obtaining CO2 and H2O. The method is capable of effectively treating the wastewater containing high-concentration organic matters and inorganic salts, and further is simple in process, hardly causes environmental pollution and is capable of changing waste into things of value.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for wastewater containing high-concentration organic matter and inorganic salts. Background technique [0002] At present, my country's ecological environment is deteriorating. In some ecologically fragile areas or areas without environmental capacity, the total amount of enterprises has been controlled, and even the discharge of sewage is prohibited, so that the water ecology can gradually restore the original water body function. [0003] Whether it is high-concentration wastewater produced by advanced treatment membrane filtration or high-concentration wastewater produced by other methods, if it is not properly treated, it will inevitably cause excessive discharge and pollute the water environment. At present, there is no low-cost treatment method for high-concentration wastewater containing organic matter such as oil and inorganic salts. Usually, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10B01D53/86C02F1/44C02F1/28
CPCY02W10/33Y02W10/37
Inventor 邓杰帆焦伟丽曾庆波
Owner DONGGUAN SANRENXING ENVIRONMENTAL TECH CO LTD
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