Method for processing reverse osmosis concentrated water by catalyzed internal electrolysis and modified 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
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[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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