Tag:flow chart

№6|2021

WASTEWATER TREATMENT

DOI 10.35776/VST.2021.06.04
UDC 628.35:665.666.6

Kevbrina M. V., Gavrilin A. M., Pronin A. А.

Introduction of advanced technologies during the construction and upgrade of the wastewater treatment facilities operated by Mosvodokanal JSC

Summary

The experience of introducing advanced technologies for wastewater treatment at the wastewater treatment facilities in Moscow is considered; process flow schemes for the structures of different capacities are described. Since the late 1990s, the Engineering and Technology Center of Mosvodokanal JSC has been working on the development and introduction of advanced wastewater treatment technologies with the removal of nutrients. Since the composition of wastewater differs at different treatment facilities, it is not possible to “transfer” foreign technologies without correction and adaptation; moreover, sometimes the development of technology “from square one” is required. For more than 20 years, a stepwise introduction of advanced technologies has been carried out at the Moscow treatment facilities of South Butovo and Zelenograd, at the nutrients removal block at the Lyuberetskie wastewater treatment facilities, at the new block of the Kurianovskie Wastewater Treatment Facilities. At present, the reconstruction of the Lyuberetskie Wastewater Treatment Facilities (old and new blocks) is underway, the reconstruction of the old part of the Kurianovskie Wastewater Treatment Facilities is planned, the treatment facilities of the Troitsk and Novomoskovsk administrative districts in Moscow have been under upgrade. The experience of Mosvodokanal JSC was used in the development of an ITS 10-2015 reference book of the best available technologies. A variety of process solutions provides for ensuring the standard quality of effluent for the conditions of different facilities.

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№11|2013

DRINKING WATER SUPPLY

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UDC 628.16.065.2

Belyak А. А., GERASIMOV M. M., GUSEVA O. A., SMIRNOV A. D.

Removal of ammonia nitrogen from surface water source
with the use of powdered zeolite

Summary

During flood periods increased concentrations of ammonia nitrogen in river water to 2–2.5 maximum permissible concentration are recorded at the Kirov water treatment plant. The assessment of possible use of powdered clinoptilolit containing zeolites in the existing water treatment process flow scheme to eliminate ammonium ions from natural water is given. The tests were carried out with the Viatka river water. After zeolite powder dosage of 0.1–1.3 mg/l addition into the water and 30 minutes mixing (200 rpm) slick was formed. During sedimentation a part of zeolite powder settled for 2–3 hours; however high turbidity remained for 24 hours. After adding 10 mg/l dosage of coagulant (aluminium sulfate) (as Al2O3) and Praestol 650TR flocculant complete precipitation of big flocks was achieved within 5–15 minutes. The ion-exchange capacity of powdered zeolite specimen – from 1.35 to 2.25 (as ammonia nitrogen) was determined. The highest ion-exchange capacity was recorded for Sokirnit natural zeolite (0.06–0.1 mm particle size). It was proved that ammonium ions exchange capacity depends on the concentration of clinoptilolit in the material (its concentration can change in the process of natural zeolite disintegrating and fractionating). The first pilot line of the plant with a capacity of 58 thousand m3 of water per day that provided for reducing ammonia nitrogen concentration to the level lower than MPC (2 mg/l) was assembled and tested at the Kirov water treatment plant.

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№9-1|2011

WASTEWATER TREATMENT

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UDC 628.3.004.69

Modernization and Reconstruction of Sewage Treatment Facilities of the Municipal Unitary Enterprise Vodokanalof the City-Resort of Anapa

Summary

Features of the wastewater treatment in resort towns are described. The ways of enhancement of operation efficiency of sewage treatment facilities of the MUE Vodokanal of the city-resort of Anapa are considered. A brief characteristic of two variants of modernization of treatment facilities are presented. The first variant stipulating the partial replacement of equipment makes it possible to reduce expenditure and enhance efficiency of wastewater treatment at the most unsatisfactory operating parts of the flow chart. The second variant demands significant capital investments, changes in the flow chart and replacement of equipment, but at the same time economic efficiency and the required quality of wastewater treatment according to all the indicators are achieved.

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№10|2023

WASTE MANAGEMENT

UDC 628.169.7
DOI 10.35776/VST.2023.10.06

Butko D. A.

Optimization of designing the systems for waste water purification from waterworks operating with low-turbidity waters

Summary

The issues of designing schemes for processing wash water of rapid filters (contact clarifiers), sludge from wash water treatment facilities and sludge from sedimentation facilities are considered. The results of a study of wash water of rapid filters at the water treatment plants operating with PolyDADMAC organic coagulant-flocculant are presented; the qualitative indicators of the sludge from the sedimentation tanks at these facilities are given. Options for wash water recycling are considered, such as supplying to the headworks and washing contact clarifiers, as well as process water supply (road washing, production needs of industrial enterprises, etc.), and agricultural irrigation. The water quality indicators for each of the recycling options are given, and an algorithm for selecting a process flow scheme is presented that will provide for the required effluent quality standard by adjusting the treatment scheme. Options for the utilization of sludge of sedimentation tanks and wash water treatment facilities as potting soils, stone and ceramic building materials are presented. The criteria for choosing a utilization option and the algorithm for choosing process flow schemes are presented. The proposed approach to designing schemes for wash water and sludge treatment simplifies their selection at the stage of a new design or upgrade.

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№12|2015

WASTEWATER TREATMENT

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UDC 628.316.13

Strelkov A. K., Teplykh Svetlana, Nosova E. G.

Treatment of chrome-containing wastewater of fur tanning factories

Summary

The results of studying the treatment of chrome-containing wastewater of fur tanning factories are presented. In the process of leather and fur tanning big amounts of wastewater containing raw material and wastes of chemicals, dyes and trimmings used for dressing are generated. A process flow scheme of wastewater treatment for the factories with a capacity of more than 200 m3/day is suggested. Theoretic substantiation of the use of standard and new chemicals is given. With the purpose of studying the physical and chemical characteristics of the total industrial waste flow observations of the pollution composition and mathematical processing of the data obtained were carried out. Studying the methods of fur tanning wastewater in context of the environmental safety showed that the pre­ference shall be given to chemical methods as well to electro-coagulation with chemical tertiary treatment that provides for the efficient treatment of such wastewater. The substantiation of technical and economic expediency of the treatment facilities construction is given.

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