The results of the analysis of composition of the spent solutions of ferrous metals etching are presented in the article. The analysis shows that this waste can be considered as raw materials for production of pigments.

The article reflects prospects and ways to use heat from wastewater. It also outlines main aspects of introducing low-potential heat sources into modern heating systems.

The article presents a diagram of a heat ventilation system. The system is designed to supply an air flow inside buildings with the function of heating it with the use of secondary and natural energy resources to minimize energy consumption from external sources of buildings’ heat supply.

The analysis of the dependence of the thermophysical characteristics of buildings on the glazing area and thermal resistances of bearing and translucent structures is presented.

The article shows a possibility to obtain pigments out of spent electrolytes from galvanic production. The influence of Fe3+ and Fe2+ on whiteness of pigments is studied.

Salt solutions properties of polyacrylamide polymers were investigate in this study. It is shown, that polyacrylamide polymers can be used as flocculants in the dehydration clay-salt slurries process in the potash production.

For for the processing of diffusion juice of sugar beet production used the drug "Biopag", which contains polyhexamethyleneguanidine chloride. Dynamics of changes in pH, clarification and the numbers of bacteria and yeast suggests the suppression of fermentation processes making the drug at a concentration ...

The article presents economic comparison of various systems of airconditioning at a shopping center.

The work considers the use of water resources in Belarus industries. The analysis of temporal variability of the use of water resources in various industries is performed. The assessment is made on the overall water intake indicator, both in the Republic of Belarus as a whole and each region individually.

The article analyses chemical composition of natural waters in the Republic of Belarus. It demonstrates a possibility to apply iron complexes with humic substances of worked out ion-exchange pitches (kationit, anionit and their mixes) to purify natural waters.