How to deal with the acid sludge produced in sulfuric acid production?
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Can any expert help me come up with a feasible solution?
The wastewater in the printing and dyeing industry is alkali and may be in demand!
It is used for sewage treatment and has the best efficiency.
Can you give me a detailed introduction, haha
Neutralize with lime, and the neutralized product can be provided to cement plants to make cement.
After adding lime milk to neutralize, it enters the settling tank. After settling, the bottom liquid is pumped into the filter press. The filter cake is sent to the building materials factory, and the clear liquid is discharged after reaction.
See Chapter 4 of the Practical Manual on Sulfuric Acid Production Process, Equipment Installation and Construction Technology and Quality Inspection and Testing Standards for Acid Water and Acid Mud Treatment
If there is a calcium carbide factory nearby, you can use calcium carbide slag. The neutralization cost can be reduced by half, but the effect is the same.
The general idea is to neutralize acidic sludge and alkaline wastewater first.
In addition, acid sludge should be a useful mineral