Lime slurry

[GeeFore]

Dear all,

My company have collected some lime slurry (with about 50% sludge / lime). We are considering to use that as a component for making gypsum and mix with sludge from our in-house wastewater treatment plant, making the final product a solid substance. Could anyone tell me how to make gypsum from the lime slurry?

Thanks & Best Regards,
Fore

 

[kenvlach]

Neutralize with sulfuric acid,

Ca(OH)₂ + H₂SO₄ --> CaSO₄^.2H₂O