Process for treating waste water by using skid-mounted type photocatalytic reaction treatment system
A photocatalytic reaction and photocatalytic reactor technology, applied in special compound water treatment, light water/sewage treatment, filtration treatment, etc., can solve problems such as low treatment efficiency and effect, and photocatalytic reaction devices are limited to laboratories, etc. To achieve the effect of simple process and equipment manufacturing and improved efficiency
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Embodiment 1
[0047] Treatment of Marigold Wastewater
[0048] 1) Pretreatment: introduce the marigold wastewater to be treated with a COD pH value of 4-6 into the pretreatment pool 11, and remove larger suspended matter through the grid in the pool to avoid blocking the photocatalytic reaction treatment device;
[0049] 2) Photocatalytic treatment The main catalyst mesoporous titanium dioxide is added to the photocatalytic reactor in advance, and the waste water after the grid treatment is pumped into the skid-mounted internal diffusion photocatalytic reaction system, such as Figure 1-4 As shown, the photocatalytic reaction treatment is fully carried out. Open the ultraviolet lamp lamp tube 25 in the photocatalytic reactor, the waste water enters the photocatalytic reactor 21 in the photocatalytic reactor group, the waste water flows in from the photocatalytic reactor lower end, and the flow velocity of the control waste water is 2m 3 / h gradually submerges the main catalyst mesoporous t...
Embodiment 2
[0052] Treatment of Papermaking Wastewater
[0053] The difference from Example 1 is that the treated wastewater is wastewater from a paper mill, and the water quality is as follows: the raw water COD is about 2700mg / L, the pH is alkaline, dark green in color, and has an unpleasant smell.
[0054] Control the flow rate of waste water to 1.5m 3 / h, gradually submerge the main catalyst zinc oxide in the photocatalytic reactor, react for 0.8 hours, and the cocatalyst is manganese dioxide. The pH regulator is dilute acid, the COD of the final effluent is less than 150mg / L, the pH value is neutral, and the chroma is less than 50, which meets the first-level discharge standard in GB8978-1996 "Integrated Wastewater Discharge Standard".
Embodiment 3
[0056] Treatment of Coking Wastewater
[0057] The difference from Example 1 is that the treated wastewater is coking wastewater from a coking plant, and the quality of the wastewater after ammonia distillation is as follows: CODcr3000-3800mg / L, phenol 600-900mg / L, cyanide 10mg / L, oil 50-70mg / L, ammonia nitrogen 300mg / L, the main catalyst used is mesoporous titanium dioxide, and the cocatalyst used is hydrogen peroxide.
[0058] Control the flow rate of wastewater to 1m 3 / h, react for 1 hour, the COD of the final effluent is less than 80mg / L, the pH value is neutral, and the chroma is less than 50, reaching the first-level discharge standard in GB8978-1996 "Integrated Wastewater Discharge Standard". The treated effluent can be used as environmental water.
[0059] The process is simple, easy to operate, high in treatment efficiency and good in treatment effect, and can meet the national first-class discharge standard for pollutant discharge.
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