Scada Control Articles on Environmental XPRT

SCADA for certainty case study

In today’s world of increasingly complex technology, two very different utilities with very different issues came to similar solutions regarding their telemetry needs. A quickly deployed and easy-to-use SCADA system is adaptable to a variety of problems commonly faced by modern water and wastewater operators. Frankfort Sewer Department Bob Peterson is the deputy director ...

Apr. 1, 2011

By Mission Communications, LLC

Future SCADA challenges and the promising solution: the agent–based SCADA

SCADA stands for supervisory control and data acquisition; it is a computer system for gathering, analysing and monitoring real time data. SCADA systems are used to monitor and control plants or equipments in a variety of modern industries. SCADA is a critical information system; its criticality comes from the fact that SCADA systems are currently vital components of most nations' critical ...

Dec. 18, 2014

By Inderscience Publishers

Taxonomy of SCADA systems security testbeds

Considerable research has focused on developing simulation environments to study the effects of cyber–attacks on supervisory control and data acquisition (SCADA) systems although a methodology to develop a SCADA security testbed is not yet available. This paper attempts to address the issue by presenting a reference model taken from the literature and classifying specific contributions on the ...

Dec. 18, 2014

By Inderscience Publishers

Locating subverted processes using random packet comparison in SCADA systems

A supervisory control and data acquisition (SCADA) system may be subject to integrity attacks. Anomalies in sensor measurements may be used to detect these attacks, but such techniques do not permit us to locate attacking nodes. We propose a novel technique to enable this. Each participating network node probabilistically copies packets and marks them with routing information, before encrypting ...

Jan. 24, 2013

By Inderscience Publishers

Increasing security and protection of SCADA systems through infrastructure resilience

In this paper, we present the approach we have taken in the INcreasing Security and Protection through Infrastructure Resilience (INSPIRE) project to improve the protection of critical information infrastructures. The core idea of the INSPIRE project is to protect critical information infrastructures (CIIs) by appropriately configuring, managing and securing the communication network ...

Feb. 2, 2010

By Inderscience Publishers

Implementing a State of the Art Automation Control, SCADA and Information System into an Existing Manually Operated 20 MGD WWTP Below Budget, on Schedule and without Process Interruption

ABSTRACTA presentation on a unique design/build and integration of an automation control system upgrade with a redundant Allen-Bradley PLC control and Rockwell Automation distributed SCADA monitoring system for a 12 MGD wastewater treatment plant including cellular wireless communications to 12 remote pumping stations. The upgrade was performed without interruption to the plant operations and ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Pebble Beach Community Services district backup monitoring to an existing SCADA system case study

Most people, not just golfers, recognize the name Pebble Beach as being one of the premier residential communities. Nestled on the shoreline and bluffs of the California Monterey peninsula, Pebble Beach is home to hundreds of multi-million dollar estates and some of the most meticulously maintained golf courses in the world. One course, the Pebble Beach golf links, hosts the annual Pebble Beach ...

Apr. 16, 2012

By Mission Communications, LLC

Intrusion detection through SCADA systems using fuzzy logic-based state estimation methods

Supervisory Control And Data Acquisition (SCADA) systems represent a vulnerability in vital infrastructures. For example, an electric power system is subjected to intrusions via its SCADA systems; however, the instrumentation provides detectable variations in response to such interference. Presented herein is a strategy that augments state estimation methods using a Hybrid Fuzzy System for fault ...

Dec. 4, 2006

By Inderscience Publishers

Healthy Control Valves

A simple maintenance routine can help ensure trouble-free valve operation. Whether the control valve in your system is the first one that has required maintenance or if you are experienced with maintaining multiple valves in your system, some simple guidelines can help keep them operating at optimal performance. Physically checking all valves at least every 12 weeks is important, assuming that ...

Aug. 13, 2012

By Singer Valve Inc.

Controlling the Flow Capacity of a Metering Pump

Since a metering pump is usually a positive displacement pump there are two possible ways of controlling the flow capacity. The first one is by adjusting the volume of liquid displaced per stroke of the pump and the second is by adjusting the speed of the strokes. I. Stroke Length – control the displacement volume per stroke II. Speed of Strokes per minute Stroke Length ...

Dec. 15, 2016

By Aquflow

Monitoring and Controlling Pretreated Liquid Waste

Intelligent dataTaker System Handles All Data Collection CAS DataLoggers has just provided an intelligent data logger for a manufacturer facing stringent environmental regulations requiring them to continuously monitor and manage their effluent disposal. Before effluent is discharged from the facility, it had to be heavily ...

Dec. 13, 2012

By CAS DATALOGGERS

Process control in multi-stage flash desalination industry

Process control is an essential part of the desalination industry that requires to be operated under optimum conditions to increase the lifetime of the plant and reduce the unit product cost. Improved process control is a cost-effective approach to energy conservation and increased process profitability. The Multi-Stage Flash (MSF) plant involves many complicated operations related to steam, ...

Sep. 13, 2010

By Inderscience Publishers

Real-Time Control Optimizes Extended Aeration Processes

The population of Hillsborough County, Florida has doubled since the Valrico advanced wastewater treatment plant (AWTP) was built in 1990 to treat the sewage of several small communities west of the City of Tampa. When it began operation, the Valrico AWTP capacity was only 4 MGD; small when compared to Tampa's 96 MGD Howard F. Curren AWTP located not far to the east. But Valrico serves as a very ...

Aug. 1, 2010

By Applied Spectrometry Associates (ASA Analytics)

Real Time Control: Becoming a Reality in Ottawa - RTC Modelling, Design and Implementation for CSO Control

ABSTRACT A Real Time Control (RTC) Feasibility Study concluded that CSO control requirements for the City of Ottawa could be achieved through the implementation of a more efficient operating strategy at key flow regulators along the City's interceptor sewer system. The project provides a simple and costeffective solution that can be integrated within existing regulator structures, the ...

Oct. 13, 2007

By Water Environment Federation (WEF)

Network Models in the Control Room the Fact and the Fiction

In this article Dan Stevens, Senior Support Engineer for Water Distribution Software at Wallingford Software, discusses the potential for Network Models to be used in the control room, what is possible, and indeed what is a sensible level of integration of network modelling with other systems (such as telemetry and SCADA) for a more complete understanding of system operation and performance. For ...

Jan. 1, 2002

By Innovyze

Keeping Your Control Valves in Good Health

Whether that brand new control valve in your system is the first one you have ever had to look after or if you are an old hand at valve maintenance with tens of valves in your system, there are a few simple guidelines and reminders for keeping it operating at optimal performance. It’s important to physically check valves at least every 12 weeks or so, assuming everything is running fine in ...

Sep. 11, 2012

By Singer Valve Inc.

Enhancing small hydro automation using distributed micro-controllers and simulation

The past ten years has seen significant advances in low-cost micro-controllers, data communications and personal computing. Applying these technologies to small hydro automation, affordable multifunctional distributed processing solutions is now a commercial reality. The ability to reduce costs is facilitated by innovative low-cost simulation tools. The successful application of these ...

May 25, 2005

By Inderscience Publishers

Automatic control valves: how to assess ACV applications

As automation and computers claimed a foothold in the operation and control of reservoirs and elevated water tanks, the industry moved the valve control from mechanical automatic control valves (ACV) to actuated butterfly and ball valves. The primary reason? Actuators can be controlled by SCADA systems, which have been almost ...

Jan. 25, 2017

By Singer Valve Inc.

Feed-forward coagulant control using online UV/Vis monitoring

Water quality from the Murray River, Australia, can vary considerably and is expected to become more challenging to treat due to recent drought followed by widespread flooding and future climate change impacts. Better tools are required to help plant operators maintain water quality. Morgan water treatment plant (WTP) operates overnight to take advantage of off-peak electricity, however the ...

Apr. 3, 2013

By IWA Publishing

Top 10 Reasons to Choose a Diaphragm Actuated Control Valve

Every water system typically consists of piping networks that distribute water from a source or storage reservoir to the end users. This frequently requires miles of piping mains along with pumps systems and controls that all have to be monitored and controlled somehow. Whether this control is to regulate pressure, a level or a flow, this usually will require some form of a ...

Apr. 27, 2016

By Singer Valve Inc.

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