Water Treatment and Water Quality Control under the Conditions of Phytoplankton Development on the Example of the Moskva Water Source

Summary

Water bloom can influence significantly on the reliability of water supply of Moscow. The phytoplankton development depends on a whole number of factors: warming up and illuminance of water masses as well as availability of nutrients, biogenic elements (nitrogen and phosphorous mainly), in sufficient quantity are basic of them. Morphometric peculiarities of reservoirs and their hydrological conditions are of great importance. Quantity of phytoplankton changes appreciably year in year out. High concentrations of algae at certain periods favour the deterioration of organoleptic characteristics of water quality which complicates the process of water treatment. In that case it is necessary to carry out a whole number of measures beginning from redistribution of outflows from reservoirs and completing by introduction of innovation technologies of water treatment.

Key words

potable water , reservoir , phytoplankton , water bloom , water treatment station , organoleptic characteristics of water quality

Optimization of the operation of the Penza water treatment facilities

Summary

With the purpose of providing for high quality drinking water at the Penza water treatment facilities, timely measures were taken to remove odor in the midst of plankton growth in the water source. Advanced flocculants were chosen for the processes of water and wash water treatment at the filtration facilities. Reducing the cost of chemical water treatment was achieved. The results of in-process testing of sorption purification of natural water carried out during the period of intensive plankton growth showed possible odor reduction by 1 point and feasible zeolite use during the initial and active periods of odor appearance in the water source.

Key words

potable water , water bloom , zeolites , plankton , optimization of the chemical consumption

Assessment of the state of water supply sources under the conditions
of anthropogenic eutrophication of water reservoirs

Summary

Deterioration of the water quality in water supply sources and amplification of water treatment technologies have been typical phenomena under the conditions of anthropogenic eutrophication of water reservoirs. The results of water quality monitoring in the Kuibyshev water reservoir under normal and abnormal weather conditions are presented. The observations were carried out both at fixed and mobile stations with the use of traditional and automated measuring instruments. It was stated that phosphate concentrations in water influenced the rate and duration of algae growth (water bloom). On the basis of the observations in an abnormally hot year the prediction of the ecological state of the water reservoir under the conditions of global warming in the Lower Volga watershed is made. It is shown that under the conditions of excess nutrient load and global temperature increase the state of the Kuibyshev water reservoir as a water supply source will deteriorate. The measures are recommended that will provide for reducing the nutrient load in the water reservoir including the development and introduction of regional standards with account for the natural specifics of the given water supply source.

Key words

water supply source , water bloom , water reservoir monitoring , anthropogenic eutrophication , extreme weather conditions , global warming , regional water quality standards