formaldehyde strong odor neutralization One of our customers used a very high dose of formaldehyde 37% solution (60 liter formaldehyde  in 40 liter water) for disinfection in  his chicken farm (saloon). Now he says the odor of formaldehyde is very strong and can`t start breeding  season.  How can I help her?

Can he  neutralize  formaldehyde odor with some chemical treatment? Maybe he can use sodium hypochlorite (bleach). Do you think chlorine can oxidize formaldehyde?
Ammonia water, AKA ammonium hydroxide ($\ce{NH4OH}$), reacts with formaldehyde to form hexamine, a comparatively innocuous solid (though it is flammable when dry).

Safer might be Neutralization of Formaldehyde Gas by Ammonium Bicarbonate and Ammonium Carbonate, which would greatly reduce the flammability of the product.