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Number 8 / 2021
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DOI 10.35776/VST.2021.08.01
UDC 676.011:628.1/.3
Petrova Liudmila, Shcherbakova Julia, Sizova Irina
New level comprehensive approach: living water engineering
Summary
The experience and competencies in the water supply and wastewater disposal market gained by ECOS Group over more than 30 years of development and professional growth, are invaluable. Based on the long history of implemented projects, scientific, technical, design and production experience, ECOS Group today offers innovative solutions to urgent and challenging tasks, quickly responds to rapidly changing conditions in the wastewater treatment and effluent reuse market, follows new trends in the professional environment. Ecos Group takes into account crisis processes in the economy and the specific needs of clients with care for the planet, people, the future, and the profession. A comprehensive approach to the implementation of projects ensures at every stage the fulfillment of the commitments eliminating the risks of unjustified costs and reducing damage to the environment.
Key words
wastewater treatment , integrated approach , ECOS Group , Center for Research and Education , effluent reuse , ECOS Group , implemented projects
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DOI 10.35776/VST.2021.08.02
UDC 628.32
Getmanskii Artem, Shcherbakova Julia, Kukoba Konstantin
Equipment manufactured by ECOS Group within the frames of the Import Substitution Program: relevance and efficiency
Summary
Changes in the financial and economic situation in the country and in the world are pushing companies to develop new and optimize existing technologies. For 15 years, ECOS Group has been manufacturing original block-modular plants with a capacity of up to 1200 m3/day. A new product line of block-modular and container plants with increased productivity up to 7500 m3/day, as well as a product line of own-produced branded electromechanical equipment have been developed. The special design of wastewater treatment plants has a wide range of advantages: high reliability and energy efficiency, stability in operation, seismic resistance and, at the same time, modular flexibility. The assured effective treatment is achieved by means of full equipping and testing of the plant at the manufacturing works. In the process of manufacturing, the Import Substitution Program has been actively used resulting in developing economically competitive, efficiently operating and proven process solutions.
Key words
wastewater treatment , sludge dewatering , dehydrator , screw mechanized screen , sludge drying , block-modular plant , sludge disinfection , drum screen , combined screen , tangential grit chamber , flocculant preparation plant
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DOI 10.35776/VST.2021.08.03
UDC 628.1/.3:697.911
Zoubov M. G., Obukhov Dmitrii, Diachuk Sergei
Engineering examination as the basis for the successful reconstruction of natural and waste water treatment facilities
Summary
During the operation of natural and waste water treatment facilities, conditions may change in relation to those accepted in design decisions. As a result, the treatment facilities cease to perform the functions assigned to them. Before the reconstruction of such water treatment and wastewater treatment facilities, engineering and technical examination is the basis for making the right technical and technological decisions. The examination involves a decision-making algorithm aimed at achieving the goals set while designing.Through the example of one of the food industry enterprises, the authors considered the positive impact of an extended engineering examination for the acception of correct technical and technological solutions that provide the proper quality of wastewater treatment with optimal capital investments.
Key words
reconstruction , wastewater treatment , water treatment , food industry , engineering examination , project , changes in the composition of wastewater , production of semi-processed goods
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DOI 10.35776/VST.2021.08.04
UDC 628.179.2
Litvinenko Viacheslav, Lanovoi Andrei, Obukhov Dmitrii
Implementation of a recycling water supply system at a plant for the production of mineral fertilizers
Summary
The introduction of recycling water supply is an important factor in reducing the negative impact of industrial enterprises on the environment. In 2007, experts from ECOS Group built and commissioned wastewater treatment facilities for a mineral fertilizer plant. Commissioning was preceded by full-fledged pilot tests in a pilot plant with a capacity of 1 m3/h. Preliminary pilot tests are a smart move in the implementation of projects for the construction of wastewater treatment facilities. The proposed process solutions were tested in the pilot plant: dosages of chemicals, subsequent clarification, filtration and sorption in gravity filters. As a result, the process parameters and the main indicators of the quality of raw wastewater were determined. The filtration efficiency in a ERSH filter was up to 80%. The necessity of raw wastewater balancing and the use of a biological treatment stage is shown. Upon completion of the work, the customer received reliable, easy-to-work treatment facilities; effluent discharge into the municipal sewer was ceased and the water consumption for the production needs was reduced.
Key words
coagulation , ion exchange , recirculating water supply , pilot tests , production of mineral fertilizer
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DOI 10.35776/VST.2021.08.05
UDC 628.35
Zoubov M. G., Vilson Elena, Obukhov Dmitrii
Method of combined treatment of air terminal wastewater and liquid wastes from dry closets of aircrafts
Summary
The composition of the wastewater of air terminals includes sewage and industrial wastewater from the technological equipment of the food unit. Process flow schemes for wastewater treatment of air terminals do not provide for the reception and treatment of liquid wastes from water closets of aircrafts, that are highly concentrated in terms of COD, ammonium nitrogen, phosphorus. In addition, they contain high concentrations of disinfectants with quaternary ammonium salts (QAS) as an active ingredient toxic to microorganisms. As a result of liquid waste discharge to the operating treatment facilities of the air terminal, the quality indicators of biological wastewater treatment have significantly deteriorated, and the properties of the biocenosis of the biofilm have also changed. The aim of the research was to determine a method for reducing the concentration of QAS to the level where the toxic effect on the biofilm biocenosis ceased, and to develop an appropriate process flow scheme. An analysis of the literature data on the impact of QAS on activated sludge microorganisms is presented; on this basis laboratory studies were carried out and a method was developed for the pre-treatment of liquid waste from aircraft water closets for the subsequent combined treatment with the air terminal sewage. In the course of the tests, the efficiency of pollution sorption, including QAS, by the preliminary regenerated excess activated sludge was determined. The technological parameters of the processes were determined; an efficient, reliable, easy-to-use process flow scheme for the combined treatment of sewage of the air terminal and liquid waste of water closets of aircrafts was developed and implemented.
Key words
biological treatment , surplus active silt , adsorption , air terminal wastewater , liquid waste of water closets of aircrafts , quaternary ammonium salts , pre-treatment
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DOI 10.35776/VST.2021.08.06
UDC 628.35
Zoubov M. G., Litvinenko Viacheslav, Vilson Elena, Kadrevich Artem
Combined destruction of ethylene glycol, formaldehyde and methanol by biological methods
Summary
The objective of the applied scientific research is to determine the specific rate of oxidation of toxic organic compounds – ethylene glycol, formaldehyde and methanol – by the community of microorganisms of the immobilized biocenosis on the ERSH® carrier installed in a pilot plant. To achieve this goal, a multi-stage experiment was carried out that provided for determining possible enhanced biodegradation of toxic substances and specifying the required concentration of ammonium nitrogen in raw wastewater for the implementation of the biodegradation process. In the course of the study, the following works were carried out: determining the process stabilization time in the pilot plant after the scheduled shutdown in the wastewater supply on the 31st day; assessing the specific rate of oxidation by the attached biocenosis in terms of ethylene glycol, formaldehyde, COD, BOD; assessing the assimilation and transformation of nitrogen compounds; drawing conclusions based on the analysis of the research results required for estimating the feasibility of using biological wastewater treatment with the attached biocenosis of the pollutants under study and determining the design parameters of the treatment plant.
Key words
wastewater , bioreactor , ethylene glycol , formaldehyde , methanol , biological methods , immobilized microflora
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DOI 10.35776/VST.2021.08.07
UDC 628.35:351.814.1
Kadrevich Artem, Vilson Elena, Litvinenko Viacheslav
Airport surface wastewater treatment
Summary
Nowadays the problem of pollution of surface wastewater from the territory of airports with aircraft anti-icing products (ethylene glycol) and products of anti-icing treatment of solid surfaces (formates and acetates) is gaining more and more publicity. The damage to water resources can no longer be hidden, since the residents of residential area close to the airport pay attention to dying flora and fauna, changes in the color and smell of the rivers receiving discharged raw wastewater. The lack of understanding among engineering companies of how this problem can be solved gives no way to the airports to do this. An analysis of the world experience of airports related to the treatment of surface wastewater contaminated with ethylene glycol is given. The process flow scheme of biological and physicochemical wastewater treatment developed by the process engineers of «ECOS» JSC, taking into account the regulatory requirements accepted in the Russian Federation, is presented.
Key words
biological treatment , bioreactor , surface runoff , pilot plant , biofilm , Center for Research and Education , ethylene glycol , airport , anti-icing liquid , anti-icing liquid , formate , acetate , synthetic media , laboratory setup
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DOI 10.35776/VST.2021.08.08
UDC 346.543:628.3
Lanovoi Andrei, Chumachenko Vadim, Ivanov Aleksandr, Iakovenko Aleksandr
Public-private partnership: case study of the wastewater treatment facilities in Novoshakhtinsk
Summary
Since the transition of Russian Federation to a new economic model of development, socially significant industries have remained in the shadow of the «locomotives» of the economic development, i. e., the fuel and energy and mineral resource sectors. Branches of the national economy that had no commercial interest died out completely or shrank to the size of a possible minimum payback. These changes also affected the housing and utilities sector, in particular, the water supply and wastewater disposal systems. The catastrophic state of the industry currently requires special attention and special decisions on the part of all the stake holders: the state and municipal authorities, control and supervision bodies, operators of water and wastewater utilities, commercial organizations, higher education, the relevant scientific community and population. One of the basic sectors of the national economy should not be in such a state and, despite the lack of the economic stability, its restoration should be a priority state task directing the maximum material and intellectual resources of the country. An example of a concession agreement is given that can be a possible way to extend the resource of an urban wastewater disposal system with a wear limit.
Key words
water supply-sewerage services , Public-Private Partnership , concession agreement , wear limit of the systems and facilities , economic and environmental risks
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