Study of the chemical and physical composition of raw water at the pumping-filtration stations of Samara

Summary

The results of the study of physical, chemical and bacteriological composition of the raw water at the pumping-filtration stations in Samara for the period of 2011–2015 are presented. The limits of water quality variation by 53 indicators were determined. It was proved that the actual BOD/COD ratios were significantly lower compared to the critical value 0.5, i. e. the incoming raw water at the pumping-filtration stations in Samara contained mainly resistant to oxidation inorganic matter requiring physical and chemical treatment. It was shown that the microbiological quality of the incoming raw water at PFS-1 was worse compared to the raw water quality at PFS-2. The statistically reliable values of the physical and chemical indicators of the raw water at the water intakes in Samara were determined that provided for establishing an automated data base in «Samarskie Kommunal’nye Sistemy» LLC for predicting the required modes of drinking water purification.

Key words

water intake , reagent , pumping station , raw water , water quality prediction

On the state of the water quality in the Kuibyshev and Saratov water reservoirs and the prospects for one- and two-stage treatment schemes

Summary

The results of studying the physical and chemical composition of the source water of the Kuibyshev and Saratov water reservoirs at the water intake sites operated by Avtogradvodokanal LLC, Tolyatti Urban District, and Samara Utility Systems LLC, Samara Urban District, for 2015–2021 are presented. Limiting values of 59 indicators of the water quality of the Kuibyshev water reservoir and 52 indicators of the Saratov water reservoir have been established. The water in both water reservoirs polluted with resistant to oxidation organic substances, can be referred to the III hazard class and is assessed as «moderately polluted». In the water of the Kuibyshev reservoir increased concentrations of phytoplankton and zooplankton were found. The reservoir water needs physical and chemical treatment before being supplied to the consumers. It is shown that the physical and chemical composition of the water of the Kuibyshev water reservoir in terms of turbidity, concentration of phytoplankton and zooplankton is worse than the water composition in the Saratov water reservoir; therefore, it requires additional treatment before being supplied to the treatment plant.

Key words

turbidity , chromaticity , reservoir , permanganate oxidizability , raw water