A kind of azo printing and dyeing wastewater treatment process
A technology for treating process, printing and dyeing wastewater, applied in textile industry wastewater treatment, water/sewage treatment, water treatment parameter control, etc. Effect
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Embodiment 1
[0034] Take a certain printing and dyeing wastewater, pH9.3, chroma 970, CODcr1400mg / L, methyl orange 9.16×10 -5 mol / L;
[0035] (1) Biological adsorption treatment: sludge load is 6kgBOD 5 / (kgMLSS·d), sludge concentration 3000mg·L -1 , hydraulic retention time 0.5h;
[0036] (2) Broken wall treatment
[0037] The sludge discharged from the biological adsorption tank is transported to the wall-breaking treatment process, and the sludge is subjected to wall-breaking treatment. 2 10 minutes under the acoustic energy density;
[0038] (3) Anaerobic acidification
[0039] The sludge treated by wall breaking is transported to the anaerobic acidification process for acidification treatment, and after controlling its pH to be maintained between 4.5-5, the reaction conditions are maintained for 1 hour;
[0040] (4) Reduction treatment
[0041] The supernatant of the anaerobic acidification process and the effluent of the biosorption treatment process are transported to the r...
Embodiment 2
[0046] On the basis of Example 1, the effluent from the biosorption treatment was sent to the micro-electrolysis process, and the effluent from the micro-electrolysis process was sent to the dehydration process for dehydration treatment.
[0047] Effluent water quality: pH7.1, chroma 29, CODcr53 mg / L, methyl orange was not detected.
Embodiment 3
[0049] On the basis of Example 2, the concentrated solution of the ultrafiltration process is subjected to oxidation treatment before entering the biochemical process, and the oxidation treatment is a Fenton oxidation process.
[0050] Effluent water quality: pH 7.1, chroma 18, CODcr 35 mg / L, methyl orange was not detected.
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