DOI 10.35776/VST.2021.12.05
UDC 628.1/.2
Gvozdev V. A., Leonov L. V., Rublevskaya O. N.
Eternal engine of progress
Summary
The quality of water supply and wastewater disposal services over the first twenty years of the 21st century has brought SUE «Vodokanal of St. Petersburg» to a new level of development owing to the introduction of innovative technologies in water supply and wastewater disposal systems. The use of technologies, such as two-stage disinfection of drinking water, odor control of landfills, geotubing, the use of Flottweg centrifuges, powdered one-component flocculant, powdered activated carbon, the introduction of a precipitation measurement system, were carried out with the active participation of Fedor Ivanovich Lobanov, Assistant to the General Director of SUE «Vodokanal of St. Petersburg» on dealing with industries, who turned 80 in November 2021.
Key words
sodium hypochlorite , flocculant , powdery activated carbon , soil , geotubing , atmospheric precipitates , precipitation gauge , innovative technology , polyacrylamide , prevention of olfaction
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UDC 628.55(261.24)
Probirsky M. D., Rublevskaya O. N., Lysova Tat’iana
The contribution ofSUE «Vodokanal of St. Petersburg»to Russia fulfilling the international commitments on theBaltic Marine Environment Protection
Summary
To meet the recommendations of the Helsinki Commission on the Baltic Marine Environment Protection the experts of SUE «Vodokanal of St. Petersburg» developed a 5–7 years rehabilitation program for the Ladoga and Onega Lakes basins. The program envisages construction of new or upgrade of the existing municipal and community wastewater treatment facilities; enhanced removal of toxic substances from wastewater at the industrial facilities; efficient processing of livestock and poultry farm wastes with the utilization of their useful properties and energy potential. The progress in implementing measures on abatement of discharging raw wastewater into the Gulf of Finland, upgrade and reconstruction of the wastewater treatment facilities, wastewater treatment efficiency improvement, particularly in relation to the technologies developed by the Universities of Cape Town (UCT) and Johannesburg (JHB) with the use of membrane aerators, mixers, nitrate recycling, and also to the European technology of chemical phosphorus precipitation is described. The dynamics of reducing nutrient loading on the St. Petersburg water bodies is presented. The positive effect of putting into operation the Main tunnel sewer has been achieved. The program of the municipal sewer rehabilitation has been developed and is now underway. The results of activities related to waste and toxic substances removal are presented. The works carried out will contribute to the prevention of the Gulf of Finland eutrophication.
Key words
sewer , biogenic elements , eutrophication , the Helsinki Commission , sludge incineration plant , geotubing
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UDC 628.169.2:628.336.8
DOI 10.35776/VST.2023.09.08
Grigorieva Zh. L., Lobanov Fedor
Geotubing – a promising trend in dewatering and environmentally safe storage of biosludge
Summary
Possible use of geotubing for static dewatering and environmentally safe storage of biosludge is considered. Efficient chemicals have been provided for eliminating malodors, binding heavy metal ions, and disinfecting biosludge. The features of the application of static geotubing technology are emphasized. The proposed technology provides for the significant reduction of the area for biosludge deposit and elimination of the environmental impact during its storage with the maximum usability preservation. Advantages of the developed technology are as follows: savings on capital construction, mobility, continuous technological process, eliminating problems of process water absence, obtaining a leachate that meets the requirements for discharge to treatment facilities, low energy intensity, low operating costs, equidistribution of financial resources for the entire period of the project implementation, production of environmentally friendly product, possible work performance when convenient for the customer.
Key words
sludge , geotubing , biosludge , static dewatering , sludge thickener
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