Abstract: Observation showes that when flowing-in waste Water contains 70—100mg/1 of phenol and 250—280mg/1 of bromidable compounds,and discharge contains 0.5mg/1 of phenol and<50mg/1 of bromidable compounds,large amounts of vorticella microstoma are appeared,which can be disappeared when the content of bromidable compounds is>250mg/1.

Key words: Suckling pigs, Iron, Growth rate, Metabolism, Environment