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Wednesday, May 25, 2016

Wireless CSO Monitoring

Wireless CSO/SSO Monitoring Measures

  • Time and duration of events
  • Level
  • Flow
  • Rainfall
  • Pressure, ultrasonic and float sensors
  • Water quality

And Features:

  • Remote data monitoring using wireless technology
  • CSO alarms
  • Real-time notification
  • Automatic regulatory report generation
  • More information faster, at a lower cost

 
 

City of Ft. Wayne Case Study

Background

Combined sewer systems (CSS) are sewer systems that are designed to collect storm water runoff, snowmelt, domestic sewage, and industrial wastewater in the same pipe and carry the wastewater to a water treatment facility. Excess water enters sewers during snowmelt or rain events, especially during periods of heavy rain. If the amount of water entering the sewer exceeds its capacity, a combined sewer overflow (CSO) occurs. This excess CSO water is discharged directly to a waterbody (rivers, streams, estuaries, and coastal waters).  Because the excess water may contain untreated sewage, human health could be compromised.


City of Ft. Wayne profile

The City of Ft. Wayne, Indiana provides waste water collection service for approximately 250,000 people. In 2007 the United States Environmental Protection Agency (EPA) and Indiana Department of Environmental Management (IDEM) issued a consent decree to the City of Ft. Wayne to improve water quality and prevent negative effects from CSO events by achieving over a 90% reduction in these overflows by the end of 2025.

One component of Ft. Wayne’s comprehensive CSO event reduction program is Telog’s wireless CSO monitoring system. Telog’s alarming and report generating capabilities provide Ft. Wayne with the real-time alerts they need and also generates reports required to ensure consent decree compliance.


Benefits

Ft. Wayne’s Telog’s wireless CSO monitoring system is comprised of a battery operated recording telemetry unit with cellular modem and Telog Enterprise Software. Prior to installing the Telog system, field personnel would download data from all meters once a week so if an overflow event occurred after the download, it would not be seen until the following week. Now, with the Telog system, current conditions can be easily viewed in Enterprise or alerted to via an alarm text and/or email.

A common challenge for utilities is how to gather, analyze, and use data from different systems such as plant SCADA, metering, USGS information, etc. The City of Ft. Wayne knew it would be critical to get all these data sources into one system.  Telog Enterprise provides a common platform for collecting data from these different systems, analyzing it, and generating the reports that Ft. Wayne does on an ongoing basis.

Utilities are looking for a more secure way to bring data into their networks. Verizon Wireless worked with Telog and the City to build a private network for all the Telog devices. The benefit of a private network is that it is a wireless extension of Ft. Wayne’s own IP network so the devices are not accessible from the regular internet and they can be controlled and managed as needed.


Success

In June of 2015, the City of Fort Wayne had record rainfall amounts which caused a lot of flooding throughout the system.  In the past it would be a guessing game as to where pumps should be placed to be the most effective. The Telog system helped Ft. Wayne see where overflows were occurring so pumps could be strategically placed in the local sewer. The pumps directed water into the interceptor systems so backups could be avoided.  

Wireless CSO Monitoring

ApplicationSolutionWireless Data TransferReporting
A combined sewer system is often found in older communities where single pipe systems were originally installed to collect sewage and stormwater. Combined sewer overflows (CSO) happen during wet weather events when the discharge of wastewater and stormwater flows into a river, stream, lake or ocean. These overflow events can cause serious water pollution problems therefore CSO sites require a permit from regulatory agencies.

A requirement of holding a CSO permit is to report all overflow events and duration for each CSO site when they occur. Failure to properly report events can result in heavy fines to the permit holder. The challenge is to find an efficient, cost effective method of:
  • Monitoring CSO sites remotely
  • Collecting data without a costly, time-consuming and hazardous site visitation
  • Creating reports