A method for treating industrial difficult-to-biochemical sewage based on a continuous free radical generator
A generator, biochemically difficult technology, applied in chemical instruments and methods, oxidized water/sewage treatment, special compound water treatment, etc. Achieve low long-term operating costs, process safety and controllability, and small footprint
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Embodiment 1
[0042] 1) Preparation of copper-doped carbon nanotubes:
[0043] 100 mol of melamine and 20 mol of copper salts were mixed to obtain a mixture, and then the mixture was placed in a ball mill for 6 hours, and the mixture after the ball was over 200 mesh sieve, and then dried in vacuo for 3 hours, and finally calcined at 1200 ° C for 10 hours. Copper-doped carbon nanotubes;
[0044] 2) 1 mol of molybdate and 1 mol vanadanate is dissolved in a mixed solution in a 2 L concentration of 0.8 mol / L ammonia, and then the copper-doped carbon nanotubes prepared by 600 g of step 1 were added to the mixed solution, and then 20 ° C The lower ultrasound treatment is 2 hours, and the slurry after ultrasonic impregnation is dried in 15 hours, and the obtained sample is calcined in a high temperature of the muffle in the muffle furnace for a period of time, the calcination temperature is 600 ° C, the calcination time is 24 h, which is powdered catalyst MOO3-V2O5 / CNTs.
Embodiment 2
[0046] 1) Preparation of copper-doped carbon nanotubes:
[0047] 100 mol of melamine and 10 mol copper salts were mixed, and then the mixture was placed in a ball mill for 6 hours, and the mixture after the ball was over 200 mesh sieve, and then dried in vacuo for 3 hours, and finally calcined at 1200 ° C for 10 hours. Copper-doped carbon nanotubes;
[0048] 2) 1 mol of molybdate and 0.5 mol vanadate is dissolved in a 4L concentration of 0.8 mol / L ammonia to obtain a mixed solution, and then the copper-doped carbon nanotubes prepared by 600 g of step 1 were added to the mixed solution, and then 20 Ultrasonic treatment at ° C for 2 hours, the slurry after ultrasonic impregnation was dried in vacuo at 100 ° C for 10 h, and the resulting sample was calcined at a high temperature in the muffle furnace for a period of time, the calcination temperature was 400 ° C, the calcination time was 32 h, which is powdered Catalyst MoO3-V2O5 / CNTs.
Embodiment 3
[0061] Sample sewage treatment:
[0062] Sample sewage is a mixed sewage of tetracycline and oxytes, and water quality test indicators is: CODCR is 10,000 ~ 28000mg / L, BOD5 / CODCR <0.3.
[0063] according to figure 1 The apparatus shown, the particulate catalyst prepared in Examples 1-2 and the Comparative Example 1-2 is loaded into the catalyst bed in the fixed bed reactor 1, and the pressure of the air compressor 3 and the high pressure buffer can 2 is adjusted to achieve it. Set the pressure, heat the fixed bed reactor to rise to the set temperature, air and sample sewage feed together with a certain feed velocity, from the reaction liquid, COD test analysis, COD removal rate is shown in Table 1.
[0064] Table 1
[0065]
PUM
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