Tag:sludge

№4|2013

WASTEWATER TREATMENT

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UDC 628. 334.2.004.69

Kalinin A. V.

Hydraulic resistance of a traditional grit chamber

Summary

The experimental results of studying the grain-size distribution of sludge deposits in large combined sewers are presented. The curves of the grain-size distribution of sludge deposits are given. A formula calculating the hydraulic resistance of a traditional grit chamber in relation to the changes in dimensions in proportion to filling with sediments is proposed. Grit chambers are installed in large-size sewers upstream sewer siphons in the place of pollutants deposits accumulated because of grade reduction or local resistance.

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№7|2013

POTABLE WATER SUPPLY

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UDC 628.168.3:628.147.22:620.193veist-tek-2013

Tchoukhin V. A., Bastrykin R. I., Andrianov A. P.

Investigating corrosion deposits in drinking water supply and distribution pipelines

Summary

The results of investigating the sludge and deposit structure in drinking water supply and distribution pipelines are presented. The literature and experimental data on the structure and composition of corrosion deposits on the pipe walls depending on water quality, pipe material, diameter and age were analyzed. The data on physical and chemical composition of deposits and photomicrographs of corrosion deposits received with the help of a scanning electron microscope are presented.

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№10|2016

WASTEWATER TREATMENT

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UDC 628.35:661.5

Nikolaev Yu. A., KOZLOV M. N., Gavrilin A. M., Kevbrina M. V., Pimenov N. V., Dorofeev A. G., Agaryov A. M., Kallistova A. Iu.

Innovative energy efficient and resource-saving technology of removing ammonium from wastewater under anaerobic-anoxic conditions

Summary

The specialists of «Mosvodokanal» JSC have developed the technologies of ammonium oxidation under anoxic conditions: double-reactor for low temperatures and single-reactor for 30–37 °С. The technology for the operation at 10–25 °С is performed by bacteria (discovered in «Mosvodokanal» JSC) Сandidatus Аnammoxomicrobium moscowii, fixed to the bed. The rate of nitrogen removal is 50 g/(m3·day) of the reactor. The technology for warm wastewater treatment is performed by new bacteria Сandidatus Jettenia moscovie­nalis, fixed to the bed; the rate of nitrogen removal is 0.47 kg/(m3·day). The use of continuous flow and fixed feed increases the output of the reactor to 0.8 kg/(m3·day). Considering the high economic attractiveness and efficiency of the technology it could be expected that in the very near future the technology will become a frequent practice in wastewater treatment. For the development of the industrial-scale technology a grant was awarded within the frames of the Federal special-purpose program «Research and development for the priority orientations of the development of the scientific and technology sector in Russia for 2014–2020». The work is carried out in cooperation with Federal Research Centre «Fundamentals of Biotechnology» of the Russian Academy of Sciences in Vinogradskii Institute of Microbiology business unit. A pilot plant with a 20 m3 reactor has been assembled, commissioned and operated at the Liuberetskie wastewater treatment facilities in Moscow of a treatment capacity of 20 m3/day of dewatering centrifuges filtrate.

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№10|2011

DRINKING WATER SUPPLY

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UDC 628.169.7:614.77

Khrenov K. E., KOZLOV M. N., GRACHEV V. A., Shchegolkova N. M., Vanyushina A. Ya.

Investigation of properties of new soils produced from water sludge

Summary

The properties of soil produced from the sludge generated at the water treatment plants have been investigated. A new method of soil production has been developed. Biotesting with the use of two biotests (Ceriodaphniaand Infusoria) revealed some admissible soil toxicity while water stability was assessed as excellent. The comprehensive physical analysis showed that the addition of water sludge into loam soil enhances active processes of structure formation. The soil is well structured, resistant to unfavorable mechanical, physical and chemical impacts including acid-based solutions. The presented soil is recommended for grassplot formation as well as for biofuel crop cultivation. The grassplots formed with the new type of soil showed rather high resistance to drying up during the extremely hot summer of 2010.

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№7|2010

PROBLEMS, PERSPECTIVES

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UDC 628.336.57:628.162.52

Butko D. A., Lysov V. A.

Determination of Rheological Properties of Water Supply Sediments in Facilities Directly

Summary

Design of an instrument and a method of calculation for the determination of rhelogical properties of sediments directly in settling facilities are presented. Regularities of the change of sediment resistance to displacement depending on the depth of its position and distance from the beginning of a settling tank are revealed.

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№4|2010

ABROAD

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UDC 628.32

ROZHKOV A. N., Krivoshchekova N. A.

Experience in the Use of Biogas for Power Generation (on the example of India)

Summary

It is told about the experience in the use of biogas for power generation on the example of domestic water treatment facilities and production of organic manures from wastes of stock-rising complexes of India.

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№4|2018

SURFACE RUNOFF TREATMENT

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UDC 628.312:628.336.3

Variushina G. P., Primin O. G.

The experience of operating surface runoff treatment facilities
and the guidelines for the improvement of sludge treatment technology

Swimmer

The data on the mechanical and physical properties of surface runoff sludge generated on the lands allotted for settlement and highways is presented. The observations of the processes of natural sludge drying on the sand sludge dewatering beds at the treatment facilities show that the sludge is characterized by low dewatering properties (more than 89–94%), and this fact stipulates the demand for the improvement of the sludge treatment technology. As a result of the chemical and analytical studies of the surface runoff sludge composition it was stated that the sludge from industrial sites located in the residential districts and industrial areas, from residential constructions on the lands allocated for settlement with parklands as well as from the recreation areas with nature-sanctuaries could be attributed to class IV of hazard (low-hazard). Sludge from the territory of the Moscow Ring Road, gasoline stations, and parking lots at the shopping malls could be attributed to class III of hazard (moderately hazardous). The results of the laboratory studies showed that the use of high molecular polyelectrolytes provided for sludge thickening and efficient dewatering by centrifuging to 74–82% moisture content. The design data on the sludge specific volume (98–99% moisture content) generated in storage tanks is presented as well as the data on the specific volume of dewatered sludge (89–94 % moisture content) generated annually on 1 ha catchment area for different types of catchment areas. It is recommended during the design process not to remove water charged sludge with a moisture content of 98–99% by trucks (sludge pumps) as an expensive and ineffective method, but to dewater sludge directly at the treatment facilities with the use of stationary or mobile mechanical equipment (vacuum-filters, filter-presses, centrifuges, geotubes).

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№5|2017

SURFACE RUNOFF TREATMENT

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UDC 628.334

Variushina G. P., Sveshnikova N. V.

Addressing the upgrade of surface runoff treatment facilities

Summary

The results of studies and seasonal observations, estimation of the process parameters of the operation, and development of recommendations for improving the operation of the systems of collection, transportation, treatment and disposal of surface runoff from industrial sites and highways are presented; the studies were carried out by the laboratory for municipal, industrial and rainfall runoff and sludge. The studies have been carried out during 20 years at the operating treatment facilities built upon the project of «Mosvodo­kanalNIIproject» JSC at different industrial enterprises. The research methodology consisted in monitoring the quantitative para­meters of the incoming surface runoff, its composition and properties as well as the efficiency of pollution elimination at every stage of the process flow scheme. The concentrations of pollutants in the surface runoff were chemically determined with the use of laboratory analytical instruments against the following parameters: settling and suspended substances, oil products, chemical oxygen demand, synthetic surfactants, and heavy metals. Besides, during the studies the mechanical properties and chemical composition of oil slurry and sludge generated in the process of surface runoff treatment were studied. Based on the summarized experience of operating the treatment facilities the criteria characterizing the basic indicators of the process solutions and equipment efficiency have been deve­loped. The technical solutions that provide for upgrading the operated treatment schemes and meeting the required standards of the surface runoff treatment before discharge to the water bodies are proposed.

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№1|2010

PROBLEMS, PERSPECTIVES

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UDC 502.55:628.1:691.42

Lebukhov V. I.

Utilization of Sludge of Water Supply Treatment Facilities

Summary

A possibility of the use of sludge of potable water supply treatment facilities for production of pottery is investigated. Technological tests show that the use of sludge of the Khabarovsk’s treatment facilities as additives to common clays in a dose up to 15% of raw material weight makes it possible to solve a problem of their utilization without a decrease in quality of a produced product. The possibility of the use of treatment facilities sludge in a dose from 3 to 15% as alloy additives making it possible to improve plasticity of ceramic mass, to improve conditions of its sintering, to reduce parameters of shrinkage at all technological stages of preparation of raw materials and manufacturing of products, to reduce the size of pores generated and to improve indices of water-absorbing ability is established.

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№1|2011

RESOURCE CONSERVATION

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UDC 628.3:658.26.004.18

DANILOVICH D. A.

Energy conservation and alternative power sources at the wastewater treatment facilities

Summary

Methods of improving power efficiency of the municipal wastewater treatment facilities and heat and electrical power generation with the use of renewable power resource of wastewater. The analysis of power conservation and generation in water supply and wastewater management shows that depending on the technical solutions applied the total balance of power consumption at the water and wastewater facilities can vary from the net electrical energy consumption of 4 MW per 100 000 m3 of wastewater/day to positive balance of 7,5–8 MW (owing to 16 MW power generated including 1 MW of electrical energy). The power consumption of two independent municipal wastewater treatment plants can differ more than 6 times.

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vstmag engfree 200x100 2

mvkniipr ru

Российская ассоциация водоснабжения и водоотведения

Конференция итог

ecw20 200 300

VAK2