Ecological and toxicological safety of sewage at public service enterprises

The paper gives a survey of data on the composition of sewage from some enterprises of public service of population. Possible measures for a reduction of ecological pressure on the environmental are also analysed. Among them there are various ways for purifying sewage, i.e. by foaming out or flotation-filtration or by substitution of part of synthetic washing materials during washing process by foam condensate after their disinfection. A toxicological danger of sewage for wheat sprouting is also studied.