Method for processing saline waste water and device thereof
A treatment method and wastewater technology, which is applied in water/sewage multi-stage treatment, heating water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of inability to remove salt components in wastewater, high cost of membrane treatment wastewater, and high water quality requirements. Problems, achieve the effect of reducing processing costs, prolonging service life, and reducing the number of cleanings
Inactive Publication Date: 2009-09-02
张大伟
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Problems solved by technology
Wastewater with high salt content is highly difficult to treat, and it is difficult to treat it with conventional methods such as biological methods and chemical methods; although activated coke filtration and adsorption methods can remove organic pollutants in wastewater such as: COD, ammonia nitrogen, suspended solids, etc., but However, the salt components contained in the wastewater cannot be removed; although the membrane treatment device can remove the salt components in the wastewater, because the membrane treatment device has high requirements on the water quality of the influent, the organic pollutants in the wastewater such as: COD, ammonia nitrogen, Suspended solids often cause membrane blockage, and the membrane needs to be cleaned and replaced frequently during operation, resulting in very high costs for membrane treatment of wastewater, and 15-40% of concentrated wastewater after membrane treatment cannot be treated
[0004] Based on the above problems, a method for treating saline wastewater and a device using the method by combining activated coke filtration adsorption method, membrane treatment method and evaporation concentration method have not been reported so far.
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Embodiment 1
[0059] Adopt the present invention to process saline waste water 1 to be the waste water that produces in the production process of chemical industry, raw water quality, water quantity index are as shown in table 1:
[0060] Table 1:
[0061] project value COD (mg / L) 22,961 BOD(mg / L) 3,250 PH value 3-4 Ammonia nitrogen (mg / L) 850 Inorganic salt (mg / L) 12,290 SS(mg / L) 290 Chroma (dilution factor) 2,000 Water volume (m 3 / day) 200
[0062] The saline wastewater shown in Table 1 is sent to the pretreatment system for treatment. The pretreatment system consists of a sedimentation tank 2 , a water pump 3 , a first active coke treatment device 4 and an intermediate tank 5 . After being treated in the sedimentation tank, the saline wastewater is transported to the first active coke treatment device by the water pump, and the water treated by the first active coke treatment device is transported to the intermediate tank...
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The invention discloses a method for processing saline waste water and a device thereof, and the method includes the following steps: (1) waste water to be processed is treated with activated coke in an absorption manner so as to eliminate suspended substances, colloid, organic matters and bacteria substances in the waste water; (2) the waste water processed with the activated coke in step (1) is treated with a film to remove salt components in the waste water and clean water is collected into a clean water reservoir; (3) concentrated waste water generated after film treatment in step (2) is processed with the activated coke again to eliminate suspended substances, colloid, organic matters and bacteria substances in the waste water; (4) the film treatment is carried out to the water after the treatment in step (3) to implement concentration treatment to salt components in the water and clean water is collected into the clean water reservoir; and (5) the waste water after the treatment in step (4) is evaporated to obtain saturated brine and salt crystal.
Description
technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment method for salty wastewater. [0002] The invention also relates to a device for implementing the above method. Background technique [0003] The waste water produced in the production process of the pharmaceutical and chemical industry contains salt substances. The salt content of water indicates the amount of salt contained in the water. Since various salts in water generally exist in the form of ions, the salt content is also It can be expressed as the sum of the amount of various cations and anions in water. Salt components are mainly chlorides (magnesium, sodium, calcium, potassium, etc.). Wastewater with high salt content is highly difficult to treat, and it is difficult to treat it with conventional methods such as biological methods and chemical methods; although activated coke filtration and adsorption methods can remove organic pol...
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IPC IPC(8): C02F9/10C02F1/28C02F1/44C02F1/04
Inventor 张大伟
Owner 张大伟