Russian metallurgists proposed to dissolve the ash waste of thermal power stations with hydrochloric acid at high pressure. The resulting compounds can be used for water treatment at water utilities and thermal power stations themselves. The method has already shown effective deposition of impurities in water from Moskva river. The description of the technology is published by scientists from NUST MISIS and a number of other universities in Journal Cleaner Production. The research is funded Russian science Foundation under the Presidential Program for Research Projects.