Organic wastewater treatment method
A technology of organic wastewater and treatment methods, applied in water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low effective utilization of ozone
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[0055] Preparation of Catalyst A1
[0056] The macroporous alumina powder and peptizer are kneaded, rolled, and extruded to make a clover-shaped carrier with a diameter of 2.5 mm, and then calcined at 550 ° C in the air to obtain Al 2 o 3 Carrier, specific surface area 220 m 2 / g, pore volume 0.7 cm 3 / g, the average pore diameter is 10.4nm. Weigh 500g of alumina carrier, according to its water absorption with Fe(NO 3 ) 3 9H 2 O by Fe 2 o 3 Accounting for the ratio of 7.5% of the total weight of the catalyst to form a solution. An equal volume of the solution was used to impregnate the alumina carrier for 2 hours, dried at 80° C., and then calcined in a muffle furnace at 550° C. for 4 hours. After the temperature dropped to room temperature, it was taken out to obtain catalyst A1.
[0057] Preparation of Catalyst A2
[0058] The diameter is 2.0mm, the specific surface area is 100 m 2 / g, pore volume 0.4 cm 3 / g, strip-shaped TiO with an average pore diameter of 3.4...
Embodiment 1
[0076] The catalysts A1 and B1 are loaded into the cylindrical reactor according to the volume percentage of 50% and 50% respectively, and the total volume of the catalyst is 100cm 3 . Phenol-formaldehyde simulated wastewater (COD: 358.6 mg / L) entered the reactor from the bottom of the reactor at a flow rate of 200 mL / min, the residence time in the catalyst bed was 30 minutes, and the ozone concentration was 11.2 g / m 3 , at a rate of 400 mL / min, enters the bottom of the reactor together with the waste water. The reaction is carried out at normal temperature and pressure. After the reaction, the COD of the liquid is tested, and the catalyst activity is measured according to the removal rate of COD. The ozone concentration before and after the reactor is detected online with an ozone detector to calculate the effective utilization rate of ozone. The results are listed in Table 1.
Embodiment 2
[0078] Catalysts A3 and B1 were loaded into the reactor according to volume percentages of 40% and 60% respectively, and the reaction conditions were the same as in Example 1. The results are listed in Table 1.
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