SAFETY OF BUILDING SYSTEMS. ECOLOGICAL PROBLEMS OF CONSTRUCTION PROJECTS. GEOECOLOGY

Study of the work of laboratory-scale oxidation ditch

Vestnik MGSU 12/2014
  • Gogina Elena Sergeevna - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Department of Water Disposal and Aquatic Ecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Gul’shin Igor’ Alekseevich - Moscow State University of Civil Engineering (MGSU) engineer, scientific and educational center Water Supply and Water Disposal, postgraduate student, Department of Water Disposal and Aquatic Ecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 162-171

The social and economic development of the society to a greater or lesser degree touches upon ecological questions, which include water supply conservation. Waste water treatment plays a very important role. Over the recent years in developed countries the phenomenon of suburbanization has appeared. It means growth and development of the suburban area of the biggest cities. In relation with it, it seems perspective to investigate the technologies aimed at wastewater treatment coming from small settlements. The paper considers the prospects of the use of oxidation ditches as the main biological WWTP-structures for small towns in the Moscow region. In order to study the conditions to achieve high efficiency of nitrogen removal and to investigate the rule of simultaneous nitrification and denitrification removal (SND), the laboratory-scale oxidation ditch model was made in the Laboratory of Biological methods of Wastewater Treatment of Moscow State University of Civil Engineering. The experiment lasted for 6 months and showed good results, which can be used for further studies. The Michaelis - Menten formulas for enzyme kinetics of the studied biological system were obtained.

DOI: 10.22227/1997-0935.2014.12.162-171

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Sources and causes of surface water pollution in Hanoi (Vietnam)

Vestnik MGSU 10/2018 Volume 13
  • Nguyen Dinh Dap - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Telichenko Valery I. - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Academician of RAACS, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Slesarev Mikhail Yu. - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor of the Department of Construction of Heat and Nuclear Power Facilities, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 1234-1242

Introduction. One of the most significant environmental problems facing the Vietnamese city of Hanoi is anthropogenic pollution of surface water, especially in the To Lich river system. Currently, these rivers accept large quantities of wastewater from urban areas and industrial zones, which effluents are not treated prior to discharge into water bodies. The results of the study show that surface water in Hanoi has been contaminated by direct discharge of domestic and industrial wastewater. Considered the To Lich river system, including the To Lich, Lu, Set and Kim Nguu rivers, which receive sewage pollution from urban areas, industrial zones and other sources. Materials and methods. The most common approach to improving the situation is to identify sources of syrface water pollution and assess the quality of To Lich river and its tributaries in order to develop and propose effective and synchronous solurion for the management of water safety and quality in the water bodies of Hanoi city. The water samples were preserved and analysed in the laboratory of Environmental Analysis in accordance with standard Vietnamese methods. For this purpose, analytic apparatus, including Shimadzu AAS 6800 atomic absorption spectrophotometre (Japan), UV-VIS spectrometre, as well as a number of common laboratory instruments and equipment, are used. Results. The results of the study show that surface water in Hanoi has been contaminated by direct discharge of domestic and industrial wastewater. For many years, the rivers have been covered with rubbish, with the water turning black in colour and having an unpleasant smell. The primary cause of the pollution is drainage from many surrounding households discharging waste water directly into the rivers. Conclusions. In order to restore the aqueous ecosystems of Hanoi city, it is necessary to conduct continuous environmental monitoring of changes in the state of water bodies and develop effective and timely solutions for the management of safety and quality of water in the waterways of Hanoi.

DOI: 10.22227/1997-0935.2018.10.1234-1242

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Use of reverse osmosis to modify biological wastewater treatment

Vestnik MGSU 10/2018 Volume 13
  • Dabrowski Wojciech - Bialystok University of Technology (BUT) Ph D with habilitation, assistant professor, Bialystok University of Technology (BUT), 45 E Wiejska st., 15-351 Bialystok, Poland.
  • Pervov Alexei G. - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor of the Department of Water Supply and Sanitation, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Tikhonov Konstantin V. - Moscow State University of Civil Engineering (National Research University) (MGSU) post-graduate student of the Department of Water Supply and Sanitation, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 1220-1233

ABSTRACT Introduction. The article reports on new research into improved reverse osmosis techniques and their expanded application in wastewater treatment practice. The results of experiments aimed at determining the operational characteristics of membrane facilities that treat wastewater are presented. A new method utilising reverse osmosis to decrease concentrate effluents is proposed. Flow diagrams and mass balance equations are used to demonstrate the principles underlying the new techniques. Objectives - development of reverse osmosis techniques as a novel tool for improving and modifying existing biological wastewater treatment schemes; economic evaluation of advantages in combining reverse osmosis with biological treatment processes in wastewater treatment applications; development of the required operational modes for membrane units used to treat wastewater. Materials and methods. A state-of-the-art review describes examples of the application of reverse osmosis in current wastewater treatment practices. Results of experimental research providing data for determining membrane operational parameters are presented. Analysis of results and their discussion are presented. Results. A new membrane technique that provides high product water quality and utilisation of concentrate effluents, as well as efficient removal of ammonia from reject water following sludge dewatering, is proposed. The presented results confirm the economic advantages and efficiencies of reverse osmosis applications in wastewater treatment facilities. Conclusions. The conducted investigations confirmed the high efficiency of the reverse osmosis membrane in removing all major impurities contained in wastewater following sludge digestion and during biological treatment. The use of membrane techniques thus provides efficient and reliable operation of wastewater treatment facilities. Reverse osmosis concentrate effluent can be utilised by blending with sludge or used in fertiliser production.

DOI: 10.22227/1997-0935.2018.10.1220-1233

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