Method for advanced treatment of coking wastewater
A coking wastewater and advanced treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem that the effluent is difficult to meet the discharge standard, the treatment process is complicated, and the filler is easy to harden, etc. problem, to achieve the effect of facilitating oxidation-reduction reaction, simple process flow, and avoiding iron-carbon agglomeration
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Embodiment 1
[0045] The method for advanced treatment of coking wastewater according to Embodiment 1 of the present invention specifically comprises the following steps:
[0046] S110, take some scrap iron filings, soak the iron filings with dilute sulfuric acid to remove oxides on its surface, then soak them in dilute NaOH solution, remove the oil stains on the surface, and then fully wash the iron filings with clean water; pulverize the coke into particle size Close to the particle size of iron filings, take the processed iron filings, then mix them evenly according to the ratio of iron filings and coke at 12:1 (volume ratio), and pack them into columns;
[0047] S120. Discharge the coking wastewater after secondary biochemical treatment into the flocculation tank, and add flocculant FeCl at a rate of 3g / L 3 , static precipitation;
[0048] S130, discharge the supernatant after the flocculation treatment in the above step S120 into the acidification treatment tank, add concentrated H 2...
Embodiment 2
[0055] The method for advanced treatment of coking wastewater according to Embodiment 2 of the present invention specifically comprises the following steps:
[0056] S210. Take some scrap iron filings, soak the iron filings with dilute sulfuric acid to remove oxides on its surface, then soak them in dilute NaOH solution to remove oil stains on the surface, and then fully wash the iron filings with clean water; crush the coke into particle size Close to the particle size of iron filings, take the processed iron filings, then mix them evenly according to the ratio of iron filings and coke at 12:1 (volume ratio), and pack them into columns;
[0057] S220. Discharge the coking wastewater after secondary biochemical treatment into the flocculation tank, and add flocculant FeCl at 2g / L 3 , static precipitation;
[0058] S230, discharge the supernatant after the flocculation treatment in the above step S220 into the acidification treatment tank, add concentrated H 2 SO 4 Adjust th...
Embodiment 3
[0064] S310. Take some scrap iron scraps, soak the iron scraps with dilute sulfuric acid to remove oxides on their surfaces, then soak them in dilute NaOH solution to remove oil stains on their surfaces, and then fully wash the iron scraps with clean water. Crush the coke into a particle size close to that of iron filings, take the processed iron filings, and then mix them evenly according to the ratio of iron filings and coke to 12:1 (volume ratio), and pack them into columns;
[0065] S320. Discharge the coking wastewater after secondary biochemical treatment into the flocculation tank, and add flocculant FeCl at 2g / L 3 , static precipitation;
[0066] S330, discharge the supernatant after the flocculation treatment in the above step S320 into the acidification treatment tank, add concentrated H 2 SO 4 Adjust the pH of the solution to about 3, and let it stand for precipitation;
[0067]S340. Discharge the supernatant after the acidification treatment in the above step S3...
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