A complex of treatment facilities for the neutralization of surface run-off from urban territories

Abstract

Surface run-off from developed urban territories, be it orderly disposed surface run-off or diffused surface run-off, is among the main sources of man-made pollution and degradation of urban water bodies lo-cated within the boundaries of Moscow. In the present-day context, the improvement of their ecological condition is possible only in case of im-plementation of measures aimed at the reduction of human-induced impact on water bodies, elimination of accumulated environmental damage, re-covery of their self-purification ability and groundwater protection against pollution. The authors give the results of the seasonal monitoring of sur-face run-off composition and the composition of sludge produced by the treatment facilities located on urban territories of different functional pur-pose. The studies proved the idea that the application of polymeric floccu-lants intensifies the process of dewatering the sludge produced by treat-ment facilities in different seasons. The criteria characterizing the main ef-ficiency indices for the selection of technological approaches and equip-ment, were developed based on generalized and summarized experience in seasonal observations and evaluation of process and hydraulic parameters of the operation of surface run-off treatment facilities.

A complex of treatment facilities for the neutralization of surface run-off from urban territories

“…The analysis of treatment patterns used by the existing treatment facilities in Moscow revealed (Table 1) that the residual concentrations of suspended solids in treated wastewater, as a rule, exceed twice or thrice (sometimes even ten times for certain treatment facilities) the maximum permissible concentration for fishery water bodies (MPC fw ); as to petroleum products, their concentrations may exceed the value of MPC fw some 60 times or more [3]. The dynamics of changes in the qualitative composition of water in the Moskva River within the city boundaries (the river section between the point where the river enters the city and the point where the river crosses the Moscow Circular Highway in the vicinity of the Besedinsky Bridge) revealed that at the point where the Moskva River enters the city, the water in this river meets the water-quality requirements established by the standards for fishery water bodies [4] only with regard to the concentrations of chlorides, sulphates and (as a rule) suspended solids. All other monitored pollution values are above the limits.…”