EVALUATION OF THE POSSIBILITY TO COMPLY WITH THE ACCEPTABLE CONCENTRATION OF SULPHIDES IN HOUSEHOLD WASTEWATER DURING TRANSPORTATION
The issue of dynamics of season change in sulphides concentration in the output of pumped sewers of transit organizations of water and sewage utilities during wastewater transportation to biological treatment facilities is not sufficiently investigated. Incompleteness of data does not allow all-season evaluation and projection of the possibility to comply with the acceptable concentration of sulphides in household wastewater during transportation. In the article there results of investigation of the influence of wastewater temperature and the length of wastewater transportation by the pumped sewers into the inlet chamber of city wastewater on sulphides generation by the example of three transit organizations of wastewater treatment facilities are presented. The yearlong dynamic of sulphides depending on the temperature of wastewaters is given. Specific coefficient of sulphides concentration per kilometer of wastewaters transportation is defined. On the basis of the investigations conducted the lack of possibility of complying with the acceptable concentrations of sulphides in household wastewater during transportation along pumped sewers is proved. On the basis of the analysis of legislative requirements to the place of sample collection of wastewater and specific features of water and sewage utilities transit organizations a new point for sample collection is offered. A feasibility study of carrying out the activities regulated by the Rules of cold water and sanitation, aimed at reaching the normal sulphides concentration on the end of pumped sewer has been conducted. The necessity of legislative settlement of the issues of control and standardization of sulphides, the concentration of which objectively increases during transportation of wastewater in pressure mode is proven.