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UDC 628.336.57
Khrenov K. E., KOZLOV M. N., Kharkina O. V., Kevbrina M. V.
Treatment of Digested Sludge in Aerated Bioreactors
Summary
Processes of the treatment of digested sludge of the Moscow treatment facilities in aerated bioreactors have been studied under the laboratory conditions. It is established that in the course of stabilization of dry substance of sludge the processes of simultaneous nitri-denitrification and dephosphation take place actively. Efficiency of biogenic elements removal depends on the age of activated sludge in a bioreactor, oxygen and temperature conditions and quality of initial sludge. The flow chart of biological, aerobic treatment of digested sludge making it possible to improve water returning properties of sludge, remove the bad smelling substances, reduce the content of nitrogen and phosphorus in supernatant water has been developed.
Key words
removal of nitrogen and phosphorus , digested sludge , aerated bioreactor , thermophilic methane fermentation , odors emission , return flows after sludge treatment
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UDC 628.35:661.5
Nikolaev Yu. A., KAZAKOVA E. A., Kharkina O. V., Dorofeev A. G.
Nitrogen Removal from Return Flows of Sludge Treatment Facilities by Means of Nitri-Denitrification Without an Additional Source of Carbon
Summary
Results of the study of the process of simultaneous nitri-denitrification using the nitrite for removal of ammonium from the filtrate of belt thickeners of digested sludge at the Kuryanovo treatment facilities are presented. Introduction of the developed technology of biological treatment of wastewater containing ammonium nitrogen of high concentration and stripped with organic compounds readily oxidized without an additional source of organic carbon makes it possible to obtain the high efficiency of removal of nitrogen, suspended substances, COD, BOD5. Microorganisms capable to make denitrification using the organic substances not easily available that determines properties of activated sludge have been separated from activated sludge of a laboratory reactor.
Key words
filtrate , nitrogen removal , return flows , simultaneous nitri-denitrification , belt thickener , digested sludge of wastewater
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UDC 628.32:65.012.45
Khrenov K. E., Potemin A. A., Sapozhnikov S. I.
Planning and Control over Power Consumption at Objects of the Moscow State Unitary Enterprise Mosvodokanal
Summary
The description of a project of creation and introduction of the Automated information system of planning and control over power consumption by objects of the MSUE Mosvodokanal is presented. The urgency of execution of these works is determined by possibility of effective optimization of expenses for power consumption which share is essential in the structure of expenses of the enterprise, owing to the access to the wholesale market of electric power. The special attention is paid to the purpose of the automated system, its architectural and technical decisions, functional; screen forms are presented. Introduction of the system at objects of the MSUE Mosvodokanal has made it possible to organize electric equipment operation in an optimal mode and has ensured the considerable economic effect.
Key words
water supply , planning and accounting of electric power , automated information system , water disposal , optimization of expenditures
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