Method for processing industrial hard biodegradable wastewater based on continuous free-radical generator
A generator and difficult-to-biochemical technology, applied in chemical instruments and methods, water treatment of special compounds, oxidized water/sewage treatment, etc., can solve the problems of not meeting industrial application standards, many bubbles, easy deactivation of catalysts, etc., and achieve Reduce the time of sewage treatment, reduce the BOD/COD value, and reduce the long-term operation cost
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Embodiment 1
[0042] 1) Preparation of copper-doped carbon nanotubes:
[0043] Mix 100mol melamine and 20mol copper salt to obtain a mixture, then put the mixture into a ball mill for ball milling for 6 hours, pass the ball-milled mixture through a 200-mesh sieve, then vacuum-dry for 3 hours, and finally calcined at 1200°C for 10 hours to obtain Copper-doped carbon nanotubes;
[0044] 2) Dissolve 1mol of molybdic acid and 1mol of ammonium metavanadate in 2L of 0.8mol / L ammonia water to obtain a mixed solution, then add 600g of copper-doped carbon nanotubes prepared in step 1 into the mixed solution, and heat Under ultrasonic treatment for 2 hours, vacuum-dry the slurry after ultrasonic impregnation at 100°C for 10h, the obtained sample is ground and roasted at high temperature in a muffle furnace for a period of time, the roasting temperature is 600°C, and the roasting time is 24h to obtain the powder catalyst MoO3-V2O5 / CNTS.
Embodiment 2
[0046] 1) Preparation of copper-doped carbon nanotubes:
[0047] Mix 100mol melamine and 10mol copper salt to obtain a mixture, then put the mixture into a ball mill for ball milling for 6 hours, pass the ball-milled mixture through a 200-mesh sieve, then vacuum-dry for 3 hours, and finally calcined at 1200°C for 10 hours to obtain Copper-doped carbon nanotubes;
[0048] 2) 1mol molybdic acid and 0.5mol ammonium metavanadate are dissolved in 4L concentration and be 0.8mol / L ammonia water to obtain mixed solution, then the copper-doped carbon nanotube prepared in step 1 of 600g is added in the mixed solution, and then in 20 Ultrasonic treatment at ℃ for 2 hours, vacuum-dry the slurry after ultrasonic impregnation at 100℃ for 10h, the obtained sample is ground and roasted at high temperature in a muffle furnace for a period of time, the roasting temperature is 400℃, and the roasting time is 32h to obtain a powder Catalyst MoO3-V2O5 / CNTS.
Embodiment 3
[0061] Treatment of sample sewage:
[0062] The sample sewage is the mixed sewage of tetracycline and oxytetracycline, and the water quality testing index is: CODcr is 10000-28000mg / L, BOD5 / CODcr<0.3.
[0063] according to figure 1 As shown in the device, the granular catalyst prepared in Example 1-2 and Comparative Example 1-2 is packed into the catalyst bed in the fixed-bed reactor 1, and the pressure of the air compressor 3 and the high-pressure buffer tank 2 is adjusted so that it reaches Set the pressure, heat the fixed-bed reactor to the set temperature, and feed air and sample sewage together at a certain feed rate. After 3 hours, carry out COD test and analysis from the reaction solution. The removal rate of COD is shown in Table 1.
[0064] Table 1
[0065]
PUM
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