Abstract: Potential Ecotoxic Effect Probe (PEEP) is an index colligated the results of multiple biological and ecotoxicological tests,and an important supplement to physical-chemical assessment.With Vicia faba root tip test,luminescent bacteria acute toxicological test and fish acute toxicological test,this paper assessed the biological toxicity of wastewater discharged from 10 enterprises of Fushun City,Liaoning Province.The results showed that the industrial wastewater in Fushun City was mostly polluted at medium level,and that from pesticide and beer plants was highly toxic.The amount of wastewater discharged from these plants was relatively small,but it was essential to control its pollution.According to the criteria for pollution control,wastewater discharge from enterprises should be controlled when the PEEP value was higher than six.Our analysis showed that the PEEP values of wastewater from the 10 enterprises were higher than 6,indicating the necessity of their wastewater discharge and pollution control.

Key words: Aquatic animal, Starvation, Undernutrition, Compensatory growth