At present,the pollution of poultry and livestock breeding is serious that the quantity of discharged COD is 0.88 million t/a,the pdlutants have become the important pollution source.

• 目前沈阳市畜禽养殖污染严重,COD年排放量已达88万t,畜牧业发展过程中的排放物已成为不可忽视的污染源。