Biological preparations, other than for medical or veterinary use, namely, protein-manipulating and protein-modifying preparations for use in purification of water; biological preparations, other than for medical or veterinary use, namely, protein-manipulating and protein-modifying preparations for the treatment of water and wastewater; biological preparations, other than for medical or veterinary use, namely, protein-manipulating and protein-modifying preparations for use in neutralizing, el...