Management of Process of Construction and Reconstruction of Water Supply-Sewerage Services Objects

Summary

The article states basic principles of the EcopolymerGroup’s concept of management of the process of construction and reconstruction of water supply and water disposal objects and also features of designs of treatment facilities requiring the essentially new managerial approach. Examples of reconstruction and retechnologization of treatment facilities of Novocheboksarsk, Gorodets and Aznakaevo cities are presented. Mandatory requirements for the companies working in accordance with the Ecopolymer concept are expounded. The main thesis when working with a customer is a partnership based on trust. The EcopolymerCroup of Companies being a general designer, contractor, equipment manufacturer and supplier simultaneously assumes the responsibility for results of realization of construction and reconstruction.

Key words

reconstruction , water supply , management , water disposal , retechnologization , ecology , construction

Wastewater Vacuum Pumping Plant

Summary

The experience in introduction of modern technologies of MGUP Mosvodokanal in the course of reconstruction of sewerage gravity-flow conduits and collectors including with use of vacuum pumping of wastewater is described.

Key words:

sewer system , reconstruction , diagnostics , siphon , polyethylene , vacuum , pumping

Energy-efficient principle of upgrading the air blower house at the Samara municipal wastewater treatment facilities

Summary

As a key and economically advantageous measure on energy efficiency and investment return in the field of wastewater disposal «Samarskie Kommunal’nye Sistemy» Company approves the processes of air supply regulation at the municipal wastewater treatment facilities. A big complex of the air blower house has been designed and successfully implemented by improving the typical design projects for the RF conditions developed by SoiuzvodokanalNIIproject Institute for the estimated supply of 132 144 Nm³/h. The specific features of building and assembly works when installing 15 ton units under the conditions of the limited capacity of the hoisting equipment (9 tons) are set. The mechanical rotary blade principle of fan regulation was adopted as a basis of the energy saving solution. At the first implementation stage under the conditions of the lack of an operating automated process control system 26.1% reduction of the specific power consumption was recorded at the average specific power consumption of 22.39 kW/1000 Nm³. The engineering design reflects possible 45–100% regulation of air supply to the aeration tanks as well as its relation to the consumed power of 1273.2–2674.2 kW (for 20 °C input temperature, 50% relative humidity). Two-loop scheme of the automated control system for «aeration tank gate valve control unit – blower unit group» is presented. The analysis of the fan testing at the manufacturer’s factory is given. The parameters of regulating centrifugal air blowers by two control actions: of regulated diffuser at the outlet and inlet guide vane unit are presented. The mathematical method of recalculating the characteristics of air blowers with the use of the «degree of control» basic concept was developed and experimentally verified. The use of the method proves the wide range of the running characteristics of regulated units for all the year seasons, the mode of combined operation of one non-regulated and three regulated air blower units for the experimental work period.

Key words

reconstruction , energy efficiency , simulation modeling , air-blowing house , wastewater treatment facilities , rotary blade regulation