Patent
 (2014)

Process to anaerobic digestion of wastewater with high concentration of ammonia nitrogen or protein, in upflow anaerobic digester and sludge blanket, with immobilization of microorganisms and inhibition by ammonium controlled using zeolite-clinoptilolite, and optional production of biofertilizer

Montalvo, Silvio; Guerrero, Lorna; Sanchez E.