Technology of surface runoff purification

Zhanna Govorova,Vadim Govorov,Yulia Isachkina,Ekaterina Muraveva

doi:10.1051/e3sconf/20199706019

Zhanna Govorova, Vadim Govorov + Show 2 more

Open Access

https://doi.org/10.1051/e3sconf/20199706019

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Abstract

Surface runoff from urban area is a potential source of pollution of water bodies. Characteristics of rainfall runoff in some cities of Russia and foreign countries are given in the article. Traditional wastewater treatment facilities include the mechanical removal of large items, debris and leaves; sand removal; water clarification in accumulative clarifying tanks; chemical dosing, contact filtration and deep purification in sorption filters. Four technological schemes were analyzed. Conceptual difference of the schemes is using a new construction of accumulative clarifying tanks and different types of filters with inert floating polysterene load (CFPZ-1, CFPZ (CS), AFPZ-4). The investigation results of pilot plant that simulates the purification process of surface runoff in clarifying, sorption and I and II step cartridge filters are given in the article. During the investigation period the water entering the pilot plant had the concentration of suspended solids – 81-180 mg/L, petroleum products – 2-8 mg/L, COD – 48-97 mg/L. Analysis of the dynamic of changes in the concentration of suspended solids and petroleum products in previously treated in accumulative clarifying tank water during the filter cycle at each step showed that purification efficiency in polystyrene load layer depends on the type and dose of flocculant, filter rate and duration of filtration. The investigation results were used for the development of recommendations for the intensification of operation of industrial filters and improving technological reliability of surface runoff treatment facilities.

Highlights

Storm water runoff is one of the main sources of pollution of water bodies
Contamination of storm water runoff entering treatment facilities from urban areas depends on the climatic conditions of the region, the sanitary conditions of the reception basins and the storm water drainage network, the degree of dilution and mixing with groundwater, drain water and road washings, and the impact of technological production of industrial plants located in the catchment area or nearby [1]
Analysis of surface runoff water quality of various cities of Russia and foreign countries showed that the main contaminants are suspended solids, dissolved and undissolved organic compounds and, in some cases, heavy metal salts

Summary

Introduction

Storm water runoff is one of the main sources of pollution of water bodies. Purification of surface water runoff to meet the regulatory requirements before it is discharged into water bodies is an urgent task aimed at environmental pollution prevention. Contamination of storm water runoff entering treatment facilities from urban areas depends on the climatic conditions of the region, the sanitary conditions of the reception basins and the storm water drainage network, the degree of dilution and mixing with groundwater, drain water and road washings, and the impact of technological production of industrial plants located in the catchment area or nearby [1]. The main contaminants of the surface runoff from urban areas are suspended solids (SS), petroleum products (PP), COD, chlorides, etc.

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