Determining the environmental safety indicators of wastewater treatment facilities

Summary

A method of evaluating the environmental safety indicators of wastewater treatment facilities is presented. The method includes confirmatory analysis with the help of computer simulation of process technologies applied at the wastewater treatment complexes that consist of different purpose blocks in order to evaluate emergency outages affecting the effluent quality. The risk of possible failures of separate units that are parts of the process layout as well as the degree of environmental impact on the entire treatment facilities is determined.

Key words

sewerage treatment facilities , ecological safety , wastewater , failure risk

Estimating the safety and failure risk of hydraulic engineering structures

Summary

The need for improving the technique of estimating the failure risk of hydraulic engineering structures on the basis of the general concept of risk as the product of failure risk (frequency) by potential damage (social, material, environmental etc.) is substantiated. The results of investigations are presented that provide for the comprehensive estimation of hydraulic engineering structure failure risk levels. The suggested design approach is compared with the traditional method by test examples of estimating the risk of hydraulic engineering structure failure.

Key words

negative effect level , safety of hydraulic engineering structures , failure risk , hazard and vulnerability factor