Intense, prolonged rainfall combined with low capacity and stuffy storm-water drainage system may be the cause of severe economic losses as a result of the presence of inundation, flooding of urban areas, or washout the surface of the ground. There are also failures on wastewater treatment plant. Flash runoff from urban area can cause damage of wastewater treatment plant components, hydraulic overload and affect on the process of biological treatment by changing the quantitative and qualitative parameters of the influent.The purpose of this article is to present the experience gained in the operation of the wastewater treatment plant in adverse weather conditions and indicate lack of classification this type of objects as objects of critical infrastructure that is dangerous to the life, health, property or the environment.
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Types of water abstraction sources for irrigation, examples of water supply and water storage in the farmlands as well as advantages and disadvantages of the suggested solutions were analyzed in the article. In addition, the organizational and legal requirements relating to the groundwater and surface water intakes were discussed. From the point of view of the interests of the farmer it is necessary to know the changes that occurred in the fees and administrative responsibilities related to agricultural water intake, introduced by the new WaterLaw Act since 1 January 2018. The differences between legislation in force and repealed associated with both agricultural water management and environmental protection were demonstrated in the paper. ...
During removal of suspension in course of water and wastewater treatment processes the crucial role is played by properties and features of individual parti-cles. Such parameters as specific surface area, shape, size and compaction of sus-pension particles may decide on their settling and sorptive properties. The results of grain size analysis, obtained by means of laser granulometer, give information about structure and size of particles that form suspension.In this paper the original results of suspension's grain size analysis con-ducted on municipal wastes originating from mechanical-biological wastewater treatment plants and on filter backwash water taken from iron and manganese re-moval filters on groundwater treatment plants are presented.The modified form of Avrami equation was used in order to describe grain size results and to identify the process of suspension's formation. ...
