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A method for treating reverse osmosis concentrated water with catalytic internal electrolysis-improved biological aerated filter

An aerated biological filter, reverse osmosis concentrated water technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of secondary pollution and high energy consumption, Achieve the effect of low operating cost, low power consumption and low aeration volume

Inactive Publication Date: 2016-06-15
TONGJI UNIV
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AI Technical Summary

Problems solved by technology

When the effluent COD is greater than 50mg / L, a voltage of 2-55V should be applied to regenerate the adsorption tower, so the energy consumption is high and secondary pollution may occur

Method used

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  • A method for treating reverse osmosis concentrated water with catalytic internal electrolysis-improved biological aerated filter
  • A method for treating reverse osmosis concentrated water with catalytic internal electrolysis-improved biological aerated filter

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Experimental program
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Embodiment 1

[0028] The reverse osmosis concentrated water treatment of a sewage treatment plant in Jiangsu Province is shown in Table 1.

[0029] Table 1 Process inlet and outlet water quality

[0030]

[0031] A, Catalyzed internal electrolytic pretreatment

[0032] Use sulfuric acid to adjust the pH value of the reverse osmosis concentrated water to 2-3, enter the catalytic internal electrolysis reactor for aeration, control the dissolved oxygen concentration at 2-3mg / L, and the residence time is 2h. After pretreatment, enter the coagulation sedimentation tank, add lime to adjust the pH value = 8-9, and then add flocculant PAM. The dosage of lime and PAM is 100mg / L and 2mg / L respectively.

[0033] In this embodiment, the preparation method of the iron-carbon micro-electrolytic filler used is: the weight ratio of iron filings and powdered activated carbon is about 5.66:1, and adding rare earth metal powder accounting for no more than 0.1% of the total weight, after bonding and sinte...

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Abstract

The invention relates to a method for processing reverse osmosis concentrated water by a catalyzed internal electrolysis and modified biological aerated filter. The method comprises the following steps: 1) performing catalyzed internal electrolysis pre-processing: regulating a pH value of wastewater, and removing organic substances in concentrated water through iron-carbon internal electrolysis reaction; 2) performing two-stage biological filter biological membrane processing: after performing coagulating sedimentation on catalyzed internal electrolysis outlet water, introducing the catalyzed internal electrolysis outlet water into a two-stage biological filter (a denitrification biological filter and an aeration biological filter) to further remove organic substances and ammonia nitrogen in the concentrated water. The method is high in processing efficiency, low in operation cost and capable of effectively removing organic substances which have toxic action to human health and an ecological environment in the concentrated water and improving wastewater biodegradability; the improved aeration biological filter can be suitable for characteristics of high hardness, high alkalinity, high sulfate and the like of the RO concentrated water, so that the water quality of the outlet water meets emission needs and a novel way for processing the reverse osmosis concentrated water is provided.

Description

technical field [0001] The invention relates to a method for treating reverse osmosis concentrated water by catalytic internal electrolysis-improved aerated biological filter. The reverse osmosis concentrated water is concentrated water produced in a sewage treatment plant reclaimed water reuse project. It belongs to the technical field of advanced sewage treatment. Background technique [0002] The reverse osmosis concentrated water will be produced during the process of preparing reuse water by the reverse osmosis (RO) process in the urban sewage treatment plant. The chemical pollutants in it include not only the pollutants in the secondary treatment effluent and the chemicals added during the process operation, It also includes pollutants generated by the possible reaction between the secondary effluent and the added chemicals, such as halogenated or nitrosamine disinfection by-products. In addition to conventional pollutants, there are high-risk toxic substances in reve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 潘碌亭王九成
Owner TONGJI UNIV
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