Information management for sewage

The application

Municipal sewage from residential and industrial areas is first collected in local pumping stations. Several pumps, along with their supply and control systems, are usually installed there and have the task of forwarding the waste water to the sewage treatment plant. Strong rains, however, can overload the pumping stations, causing the sewage to back up all the way to the dischargers. These producers of waste water do have the ability to protect themselves by means of a backflow protection flap, which can be closed in such emergencies, but an adequate early warning system is still lacking. For that reason there is a great demand for automatic level monitoring in pumping stations as well as intelligent pump control and remote transmission of data to a central web server.

The process data

The solution

The level is measured by a VEGAWELL 52 suspension pressure transmitter with ceramic measuring cell. Supply and evaluation is carried out by a VEGAMET 624 signal conditioning instrument. The integrated pump switching function of the instrument ensures that the pumps are used equally. The instrument also displays the current level and recognizes the trend. These values are sent to the WEB-VV server at VEGA via a connected GPRS modem. WEB-VV is a web-based software for measured value acquisition and display.
The measurements are updated continuously and made available via an Internet portal with protected access. This information can be called up not only by the sewage disposal services but also by the dischargers, provided they have access rights. The required protective measures against backup and overflow can thus be started immediately. If the system is extended and appropriately configured, alerts can be sent automatically via SMS when limit values are exceeded.

The advantages

	Reduced monitoring costs at pumping stations
	Equal use of pumps
	Tendency recognition
	Warning system reacts when limit values are exceeded
	Avoids contamination and damage from backed-up water