What to do if the cyclone inclined tube sedimentation tank for producing wastewater is not effective?
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The production wastewater from the tobacco factory has, for some unknown reason, recently become discolored and foul-smelling. The effluent from the cyclone inclined tube sedimentation tank does not have an effective purification effect; it is yellow in color, sometimes black, and at times it contains a large amount of alum floccules floating in it. Is there any way to improve it?
There are several possibilities: 1. Sludge removal is not carried out in a timely manner; 2. Too much chemical is added (often, a large amount of alum floccules appear on the surface, and this is usually the cause). This post was last edited by opteron842 on 2009-3-20 at 15:09
Thank you! Actually, ours is still under technical renovation and hasn’t been delivered yet. But from what I’ve seen, those working in engineering also carry out sludge removal regularly, yet the results are not good. Sometimes, sludge is discharged once every two days. As for the dosage, I’m not aware of the standard; they only gave a rough estimate. Most of the time, they say that too little medication is being added. Since I’ve been in this field for only a short time, I can’t explain many things clearly.
There are many factors that influence this: whether the water inflow is stable, what the processing capacity of the equipment is, the fact that the water inflow should not exceed the processing capacity – although new systems generally don’t have this problem. Is there enough retention time? Is there sufficient time for the chemicals to react? Are there any pipeline mixers designed? Is the waste discharged in a timely manner? Is the drug concentration appropriate? The laboratory can conduct flocculation tests to roughly determine the amount to be used, with further adjustments made on-site. Factors such as the quality of the water entering the system, temperature, pH, and turbidity all play a role; there are too many of them to mention all at once – one has to learn about them through practice. Alumina-based agents work best when used in combination with polyacrylamide, as this helps increase the size of the flocs and thus speed up their sedimentation. The dosage of polyacrylamide solids is generally between 0.05 and 0.1 ppm, while that of polyaluminum chloride is around 15 ppm (based on 100% purity of the solid). The solid content is usually around 27% (referring to the effective alumina content), and there are standards available for reference
I typed it wrong; it should be someone who sells medications, haha