bbk 000000
UDC 628.35:661.63
Rouzhitskaya O. A., Gogina Elena, Salomeyev V. P.
Using reinforced medium for the enhancement of phosphate and organics removal from wastewater
Summary
The results of investigating advanced phosphate removal from domestic wastewater are presented. The method of advanced wastewater treatment with the use of reinforced medium is suggested. The highest phosphate removal efficiency is achieved with the help of the technology without activated sludge recycling. The enhancing effect of reinforced medium on biological removal of organics is shown. The activity coefficients of the biological process with the use of reinforced medium are determined.
Key words
wastewater , bioreactor , sludge index , biogenic elements , active sludge dosage , dissolved iron , reinforced medium
|
bbk 000000
UDC 628.161.2:546.72/.711
Govorov O. B., Govorova Zh. M., Kvartenko A. N.
Studies and experience of introducing innovative technologies of ground water conditioning
Summary
Ground water is often characterized by the presence of dissolved gases, iron and manganese compounds, fluorine in certain cases, nutrients, organics of natural and anthropogenic origin etc. Therefore, at the initial stage of ground water purification preliminary removal of dissolved gases and saturation of water with oxygen from air is required to provide for oxidizing protoxidic forms of the ingredients subject to removal. Testing ground water conditioning technologies was carried out under the conditions of the operating water treatment plant at the pilot facilities. The technologies involve the use of bioreactors with jet vacuum ejection at the initial stage and subsequent water filtration in filters with floating media. The role and advantages of bioreactors and technologies involving their use are shown in comparison with other aeration facilities and devices. Based on the research findings the process parameters of the main facilities operation have been specified that ensure the sustainable regulatory water treatment level. It was stated that after «charging» the bioreactor and filter media alongside with aeration and dissolved gas removal the efficiency of deironing at the first stage was 78.6–88.9%; at the second stage – up to до 97% at 25 and 8 m/h filtration rate, relatively. The results of experimental studies and commercial tests at the operating water intake are presented. The experience of operating commercial plants is generalized that confirms the efficiency of the developed energy-efficient technologies of ground water conditioning.
Key words
deferrization , bioreactor , ground water , demanganization , filter with floating media , energy-efficient technology , commercial tests
|
bbk 000000
UDC 628.161.2:546.72/.711
Govorova Zh. M., Govorov O. B.
Studies and experience of introducing the technology of ground water de-ironing and softening in the Moscow Area
Summary
The analysis of physical and chemical parameters of ground water quality from the wells of water intake facilities No. 4 and 5 in Zhukovskii town, Moscow Area, was carried out. Based on the results the priority pollutants – iron compounds, hardness salts, dissolved gases (carbon dioxide and hydrogen suphide) were identified. The technology of ground water conditioning with the use of bioreactors with jet vacuum ejection, subsequent filtration in moving bed filters and chemical water softening in a vortex reactor was substantiated. Under the conditions of an operating water intake field trials were carried out in a plant that comprised the models of bioreactor, degasifier, moving bed filter and vortex reactor. The process parameters of the main facilities operation that ensured the sustainable standard quality of the water after purification were specified. It was found that after bioreactor and filter charging water de-ironing alongside with the removal of dissolved gases was taking place. The efficiency of purification at the first stage is 88.9%, after filtration the concentration of iron in water does not exceed 0.3 mg/l. The required dosage (3.4 mg-eq/l) and concentration of sodium hydroxide solution (4%) that ensured the required level of preliminary de-ironed water softening were determined. The data on the implementation of the efficient technology of ground water conditioning at design stage and at the stage of reconstruction and upgrade of water pumping station No. 5 in Zhukovskii town are set.
Key words
filter , deferrization , aeration , bioreactor , ground water , degasification , softening , floating media , field trials , conditioning , jet vacuum ejection
|
bbk 000000
UDC 628.35:661.5.63
Gogina Elena
Investigating process flow scheme of wastewater biological treatment for the upgrade of the treatment facilities
Summary
The results of experimental investigations of the process flow scheme of wastewater biological treatment are given. The process of ammonia nitrogen removal from wastewater under low oxygen concentration conditions was studied. Kinetic functions for calculating ammonium nitrogen concentrations in treated water at bioreactor operation were determined. The technology was applied in the construction and upgrade of the treatment facilities in a number of cities and settlements of the Moscow Region.
Key words
wastewater , biological treatment , bioreactor , ammonia nitrogen
|
bbk 000000
UDC 628.356:661.5
KOZLOV M. N., Nikolaev Yu. A., GRACHEV V. A., Kharkina O. V., Dorofeev A. G.
Nitrification in the Course of Tertiary Treatment of Treated Wastewater with Floating Media
Summary
For complete oxidation of ammonium nitrogen at a wastewater aftertreatment stage it is proposed to use a bioreactor with floating media containing nitrifying microorganisms. Tests of the technology have been conducted with treated wastewater at the Kurianovskiye treatment facilities using the laboratory bioreactor with floating plastic media (60% by volume). After achievement of stable conditions of the bioreactor’s operation the technology proposed has ensured the reduction of ammonium nitrogen concentration by 4,8 mg/l at the average. Reasons for the reduction of efficiency of the bioreactor’s operation and appearance of nitrite-ions in the treated water when changing the technological conditions are presented.
Key words
nitrogen removal , nitrification , bioreactor , wastewater , floating media
|
bbk 000000
UDC 628.35:661.63
KOZLOV M. N., Kevbrina M. V., Nikolaev Yu. A., Dorofeev A. G., GRACHEV V. A., KAZAKOVA E. A., Aseyeva V. G., Zharkov A. V.
Single-reactor technology of nitrogen removal from wastewater
Summary
The experts of R&D Centre of «Mosvodokanal» OJSC developed high-effective technology of removing nitrogen from wastewater. The technology was tested at the Kur’ianovo wastewater treatment plant of the city of Moscow during processing filtrate of the digested sludge belt thickeners. The method is based on the use of specific Anammox-bacteria that oxidize ammonium with nitrite under anoxic conditions. Filtrate is processed in a sequencing batch reactor with complete mixing (SBR-reactor). Partial nitrification processes (ammonium oxidation into nitrite), ammonium oxidation with nitrite and organic matter oxidation are carried out in one reactor. Retention of extremely slow growing biomass of Anammox-bacteria has been a critical problem for all the reactors. In this particular case the problem was solved with bacteria adhesion on the reactor walls and the feed as well as with flotation. To evaluate the treatment efficiency standard methods were used. The developed single-reactor modification of the anoxic oxidation of ammonium differs from the well-known by the following parameters: high nitrogen removal efficiency, the method of biomass bacteria retention in the reactor, the availability of new Anammox bacteria, heterotrophic denitrification. All other conditions being equal the integration of Anammox single-reactor technology requires the size of the facilities ten times smaller than double-reactor technology; for this reason it is more preferable for implementation. The new technology was given the name AUTOHETAMMOX.
Key words
wastewater , nitrogen removal , bioreactor , nitrification-denitrification , anammox bacteria
|
UDC 628.54:676
Feofanov Yu. A., Tarasenkov Viktor, Cherniat’ev Anatolii
Specific features of paper mill wastewater treatment
Summary
The results of the operation of local and all-factory wastewater treatment plants of a separately located paper mill using waste paper and cellulose as raw materials are considered and analyzed. The following characteristic features of the factory wastewater are indicated: significant fluctuations in flow rate and composition, high concentration of organic matter, elevated temperature, etc. The conditions for the effective operation of the local treatment facilities, including chemical treatment and two-stage pressure flotation when using waste paper and cellulose as raw materials, are noted. The unit costs and amount of effluent pollution discharged after local treatment have been determined. The data on the efficiency of the all-factory biological treatment facilities including a moving-bed bioreactor and aeration tanks, are presented. Dependencies of the main process parameters of the facilities have been obtained that provide for predicting the treatment efficiency. Measures are proposed to improve the operation of local facilities and biological wastewater treatment facilities of a paper mill.
Key words
reagent treatment , wastewater , bioreactor , aeration tank , pressure flotation , local treatment facilities
|
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
|
bbk 000000
UDC 628.33:62-278
KOZLOV M. N., Nikolaev Yu. A., Khramenkov S. V., Kharkina O. V.
Perspectives of Introduction of Membrane Technique at Treatment Facilities of Moscow
Symmary
Studies of the membrane technique of treatment of low-concentrated municipal wastewater at a pilot unit of up to 5 m3/day capacity have been carried out. As a result, high quality of treated water concerning suspended particles and biogenic elements has been obtained, resistance to volley entries of industrial wastewater and high efficiency of water disinfection have been reached. Results of pilot tests have made it possible to appreciate the membrane biotechnologies as perspective for realization at Moscow treatment facilities. Advantages of the technology with the use of membrane bioreactors: considerable reduction in volumes of facilities and spaces occupied by them owing to the high concentration of activated sludge, possibility of a higher load per a volume unit and also significant decrease in quantity of excessive activated sludge. Membrane bioreactor technologies are one of the perspectives of development of treatment facilities under the conditions of limited areas.
Key words
wastewater , bioreactor , hydraulic condition , biological removal of nitrogen and phosphorus , membrane module
|
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
|
bbk 000000
UDC 628.35:661.635
Ambrosova G. T., Funk A. A., Ivanova Sargylana Dmitrievna, Ganzorig Shonkhor
Comparative evaluation of the methods of phosphorus removal from wastewater
Summary
The evaluation of the methods of eliminating phosphorus, a most important nutrient that is a limiting element in water body eutrophication, from wastewater is presented. Biological, physical, chemical and combined methods are considered that differ from each other in the method of implementation, construction and operating expenditures. The biological method is based on phosphorus removal through its utilization in biomass synthesis in the biological system. Physical and chemical methods suppose mandatory application of chemicals used for free phosphate-ion binding to low soluble ortho-phosphate. Combined methods suppose dephosphorization at the biological treatment stage with subsequent inclusion of phosphate-ions into crystals at the physical and chemical treatment stage. The examples of practical implementation of the methods are presented; process flow schemes are considered; the process parameters of the treatment facilities are pointed out where the process of phosphorus removal is taking place; the data on the process efficiency is provided; the advantages and drawbacks of the applied methods are reported. The experience of adjustment works is described together with the results of experimental selection of chemicals for phosphorus binding and determination of the optimal point of their addition carried out by the authors in the laboratory, during pilot and full-scale studies.
Key words
filter , nitrification , bioreactor , reagent , aeration tank , denitrification , nutrient , wastewater , crystal , dephosphorization , effluent polishing , sludge growth
|
UDC 628.161.2
DOI 10.35776/VST.2024.02.01
Rublevskaya O. N., Gvozdev V. A., Portnova T. M., Sazanova N. I., Davidovich Anastasiia, Vitkovskaia Raisa, Nesterova Tat’iana
Theory and practice of the deferrization and demanganation technology: experience of the Republic of Belarus and Russian Federation (part 1)
Summary
The paper dwells upon the analysis of methods for removing iron and manganese from groundwater at water treatment facilities with the justification of each stage of the process flow scheme based on the physical and chemical process patterns. Information is presented on the factors effecting the composition of groundwater, on the theoretical foundations of the physical and chemical processes of deferrization and demanganation, and on the technology innovations. An estimation of the efficiency of the operating water treatment facilities in the Republic of Belarus and Russian Federation is given. The paper confined to the 150th anniversary of the Minskvodokanal Unitary Enterprise corroborates the cooperation of water utilities of the two neighboring states that have similar geochemical characteristics of the aquifers.
Key words
deferrization , bioreactor , demanganization , catalytic media , contact-sorption and pressure filtration facilities , cavitation unit
|
UDC 628.161.2
DOI 10.35776/VST.2024.03.02
Rublevskaya O. N., Gvozdev V. A., Portnova T. M., Sazanova N. I., Davidovich Anastasiia, Vitkovskaia Raisa, Nesterova Tat’iana, Gusev Aleksei
Theory and practice of the deferrization and demanganation technology: experience of the Republic of Belarus and Russian Federation (part 2)
Summary
The paper dwells upon the analysis of methods for removing iron and manganese from groundwater at water treatment facilities with the justification of each stage of the process flow scheme based on the physical and chemical process patterns. Information is presented on the factors effecting the composition of groundwater, on the theoretical foundations of the physical and chemical processes of deferrization and demanganation, and on the technology innovations. An estimation of the efficiency of the operating water treatment facilities in the Republic of Belarus and Russian Federation is given. The second part of the paper confined to the 150th anniversary of the Minskvodokanal Unitary Enterprise corroborates the cooperation of water utilities of the two neighboring states that have similar geochemical characteristics of the aquifers.
Key words
deferrization , bioreactor , demanganization , catalytic media , contact-sorption and pressure filtration facilities , cavitation unit
|
|
