Lead Dioxide Coated Anodes Used in Organic Wastewater
Application: Printing and dyeing wastewater treatment; industrial sewage treatment; domestic sewage treatment; oilfield wastewater treatment.
Type of coating used：Titanium-based lead dioxide anode.
Product specification: Machining according to drawing.
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Product Introduction
Electrolysis 100m³/h refining two purification reverse osmosis concentrated water Routing and processes：
(In this project, sodium hypochlorite catalytic oxidation and electrolytic catalytic oxidation were used to carry out separate and mixed treatment tests of saline biochemical effluent and reverse osmosis concentrated water. The results showed that under their respective suitable conditions, the COD of the effluent after separate or mixed treatment < 50mg/L).
Process flow diagram of electrocatalytic oxidation electrolysis for degradation of COD
The above conclusion：(Effect of COD degradation by titanium anodic in different coating systems)
|
Type of electrodes |
water get in COD/mg.L-1 |
water go out COD/mg.L-1 |
|
Timidium-based iridium ruthenium |
125 |
67 |
|
Titanium-based iridium tantalum |
125 |
56 |
|
Titanium-based iridium-ruthenium-tin |
125 |
56 |
|
Tin-antimony intermediate layer titanium-based lead dioxide |
125 |
47 |
|
Composite intermediate layer titanium-based lead dioxide |
125 |
21 |
Conclusion: It can be seen from the above that under the same influent water and test conditions, the titanium-based composite intermediate layer lead dioxide electrode has the best treatment effect on sewage. The electrode treatment effect of the composite intermediate layer of titanium-based lead dioxide is better than that of the electrode of the tin antimony intermediate layer of titanium-based lead dioxide.
The analysis reason is: the titanium-based composite intermediate layer lead dioxide has a higher oxygen evolution potential than other electrodes, which can effectively prevent the occurrence of side reactions in the electrolysis process, and the current efficiency is high, so the treatment effect is good..
Field measured data:
|
Electrolysis time(min) |
Ammonia nitrogen(mg/L) |
COD(mg/L) |
Chroma |
|
0 |
71.26 |
592 |
250 |
|
15 |
50.26 |
468 |
150 |
|
30 |
38.64 |
368 |
30 |
|
60 |
10.94 |
276 |
8 |
|
90 |
0.22 |
140 |
/ |
|
120 |
<0.5 |
37 |
/ |
From the above data, it can be seen that the composite intermediate layer lead dioxide anode has a better effect in degrading the COD of printing and dyeing wastewater, and through stepped cycle electrolysis, the high-concentration COD reduces the emission standard by 50ppm within 2h of treatment.
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