Treatment method of rubber waste water
A treatment method and technology for rubber wastewater, applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Low waste, low energy consumption and improved biodegradability
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Embodiment 1
[0027] A petrochemical rubber manufacturer in Shandong, the waste water produced in the rubber production and processing process is 1000t / d, the COD concentration is 8396mg / L, the BOD concentration is 1617mg / L, the ammonia nitrogen concentration is 523mg / L, the B / C value is low, and the biodegradability is poor . All indicators have not reached the national emission standards.
[0028] (1) Coagulation and sedimentation: Take a certain amount of wastewater and add a small amount of liquid alkali to adjust the pH to neutral. Add 200mg / L reverse phase demulsifier to the wastewater at room temperature. L polyaluminum coagulant, rapid stirring to promote the flocculation of macromolecular organic matter and suspended matter in wastewater, continue to add 10mg / L coagulant PAM, stir slowly for 30s, let it stand for stratification, filter solid-liquid separation, solid phase Hazardous waste treatment, the next step of treatment in the liquid phase, after treatment, the effluent COD i...
Embodiment 2～4
[0038] Embodiments 2-4 Compared with Embodiment 1, the pH of the wastewater in step (2) is changed to 7, 9, and 12 respectively, and the others are the same as in Embodiment 1. The effluent index after step (2) is treated is shown in Table 2;
[0039] Table 2 Examples 2-4 are treated by step (2) after the effluent index
[0040]
[0041] During microwave treatment, when the pH value is equal to or greater than 11, the removal rate of ammonia nitrogen remains at about 90%, and there will not be too many changes. Therefore, the optimal pH value is set to 11, which can remove the largest amount of ammonia nitrogen in wastewater.
Embodiment 5～6
[0043] Embodiments 5-6 Compared with Embodiment 1, the microwave power in step (2) is replaced by 600W and 800W respectively, and the others are the same as in Embodiment 1. After the treatment in step (2), the water output index is shown in Table 3;
[0044] Table 3 Examples 5-6 are treated with step (2) after the effluent index
[0045]
[0046] As the microwave power increases, the heat energy generated is also increasing, and the corresponding thermal effect is more significant, which accelerates the diffusion of ammonia nitrogen molecules. From this, it can be concluded that the microwave power has a certain influence on the treatment effect of ammonia nitrogen wastewater, and the removal effect is better as the power increases, and the optimal microwave power is 700W.
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