Aqueous alkali or alkaline treat and heat regeneration of NH4+ adsorbed zeolite or zeolite-carbon used to treat waste water

摘要

A method of regenerating zeolite by heating wherein zeolite having adsorbed (NH3-N) in foul water has sodium hydroxide added thereto, the sodium hydroxide containing Na+ equivalent to NH4+ adsorbed to the zeolite, water is added until the total quantity of the zeolite is submerged, and the resultant zeolite is heated at 400 DEG C. for 30 minutes, whereby a regeneration rate of 90% is attained.