process control Articles
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pH and ORP sensors as used for process control in bleaching operations at pulp mills - Case Study
Specially Engineering Dissolved Chlorine Gas Resistant Solid State Reference Flat, yet rugged break resistant glass minimize cleaning requirements Application specific engineered thermoplastics and conductive polymer materials of construction lead to optimized sensor lifetime and accuracy The Problem A pulp and paper producer wanted to improve their control and reduce their maintenance ...
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Choose the Right Sensor for Water Quality Monitoring
Sensors are the backbone of any water quality monitoring system since they determine accuracy and reliability. As such, it is best to start with picking the sensor(s) when designing a new system for applications such as pollution control, saltwater ingression studies, aquaculture, process control, ...
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Rugged pH and cyanide ion selective mining sensors for gold leach applications - Case Study
Cyanide Sensor has been engineered for gold mining to optimized stability and lifetime Custom pH sensor with solid state triple junction reference system and thick wall rugged pH glass element can withstand continuous use in agitated slurries Unique Dual Channel pH/CN- Analyzer and automatically output total (pH compensated) cyanide using only a pH and cyanide ion selective sensor The ...
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Two Values with one Keystroke Free and Crystallization Water in Gypsum
The cleaning technologies used to reduce SO2 emissions from power stations produce high purity gypsum as a by-product. The prompt availability of free and crystallisation water values are needed for in-process control and are provided within one test sequence by the HR83 Halogen Moisture Analyzer from METTLER ...
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Continuous real-time Quality Control in confectionery production - Case Study
As Valentine's Day approaches and thoughts turn to chocolates and sweet treats, it's important to remember the critical role that process control plays in ensuring the quality and consistency of these delectable delights. At Westech Industrial, the distributor of Vaisala (Finland) K-PATENTS® products in Eastern Canada, they understand the importance of precision and ...
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Improving the rapidity of responses to pipe burst in water distribution systems: a comparison of statistical process control methods
A pipe burst is a major water distribution system failure. Water escapes the network through the break increasing the total flow entering the network. These higher flows, in turn, increase the head losses in pipes and result in lower water pressures at customer taps. This study focuses on burst detection by seeking to identify anomalies in net system demand, pipe flow rates, and nodal pressure ...
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FPI Solution: Steel Making Process and Detection of Its Process Gas
Application Area: Iron & Steel Industry Process: Steel Making Measuring Components:O2, CO Application Scenario: Steel making process involves converting liquid iron into steel via a basic oxygen furnace (BOF, also known as a converter) or melting scrap steel and/or direct reduced iron (DRI) in an electric arc furnace (EAF). Recovery of BOF gas is the single most energy-saving improvement in ...
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Troubleshooting for Liquid Particle Counting
This paper discusses how to ensure that a liquid optical particle counter (OPC) is producing valid data. Ensuring that your liquid OPC is operating within its designed specification is critical to obtaining quality data. As data from OPCs becomes increasingly important to maintaining process control, it becomes more critical than ever for operators to have confidence in the data being generated. ...
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A disaster response management system based on the control systems technology
A networked Critical Infrastructure (CI) system performs functions critical to national economy and security. It is a complex system in the sense of a social-technical system with time-varying boundary and topology, and there are dynamic, uncertain and stochastic factors throughout a whole disaster management process. In this paper, we first present a study aimed at developing a general ...
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BP Koln
BP is one of the three largest integrated energy companies in the world. In 2000 BP and Pavilion Technologies, Inc. formed a strategic alliance to deploy Pavilion advanced process control solutions to BP facilities, their subsidiary organizations and their licensees worldwide. BP KÖLN, the first site to install Pavilion solutions, increased production by 7% and reduced transition times by as much ...
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Evaluation of ISO 9000 implementation aptness for Indian manufacturing industries using fuzzy simulation
The world is demanding continuously products with improved features and reduced cost. And this depends upon the continuous improvement strategy of the company. So there is a need for every industry to establish a standard to follow in order to achieve these organisational goals. ISO 9000 is the basic requirement for every manufacturing organisation in achieving business performance improvements. ...
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Regulation 17: the way forward to meet requirements
Regulation 17 from the Water Services Act 108 (1997) is currently being implemented for the classification of wastewater treatment facilities and process controllers in South Africa. Green Drop Assessments (an incentive-based programme for wastewater treatment works) place a large focus on Regulation 17 compliance, which replaces Regulation 2834. Over the years, a lack of enforcement of ...
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Progress in sensor technology - progress in process control - Part II: results from a simulation benchmark study
Abstract: To show the impact of sensor behaviour on the control result, four strategies for aeration control are tested using different sensor characteristics. It is demonstrated, on the one hand, how an increasing response time will limit the achievable control quality and, on the other hand, how a given sensor characteristic can be taken into account for the controller design. The presented ...
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Process Control Systems at Water Resource Recovery Facilities: Use of Process Simulation to Assist with Controller Design and Tuning. Proceedings ISA2017
Abstract: Process simulation is a useful tool to assist with control design and tuning at water resource recovery facilities (WRRFs). Simulation models serve as virtual WRRFs which can be used to design, tune, and test control systems. In addition, simulation models can be used as a basis for generating the models used in model-predictive control systems. Most WRRF simulation platforms provide ...
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The role of respirometry in maximising aerobic treatment plant efficiency
Wastewater treatment plants are coming under increasing pressure to increase their efficiency of operation. There are two objectives in this. The first is to reduce the cost of treatment. The second is a response to new legislation aimed at reducing the carryover of toxic materials to receiving waters. In order to achieve this, it is necessary to focus on the pivotal role of bacterial respiration ...
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New hybrid reactor concept incorporating a filter mesh for nitritation–anammox treatment of sludge return liquid
A new approach to perform partial nitritation–anammox in a single tank was investigated. The tank incorporated a mesh (opening size 1.0 × 1.2 mm) as permeable barrier to create two distinct reaction zones (aerated and anoxic). The study reports on the operation and optimization of a 13 L laboratory scale reactor to treat sludge reject water with an NH4-N concentration of ∼750 mg·L−1. ...
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Aire-O2’s Cold Weather Legacy - Municipal Wastewater Treatment System - Dawson, MN - Case Study
Project Background Process control is key to maximizing wastewater treatment efficiency while minimizing operating costs. Implementing the right process control system in conjunction with the right equipment can save money on electrical costs and equipment maintenance. The wastewater plant for the city of Dawson, MN, uses a Tri-Oval oxidation ditch from Aire-02 for primary treatment of its ...
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pH Electrode Guide
There are two different methods of measuring pH currently available called potentiometric and photometric, with several different subsets of technologies for each. This article focuses on the real-time monitoring capabilities of glass pH electrodes used in industrial process control, wastewater treatment, and environmental data logging and provides comparisons of common features to assist in ...
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Effect of extruder screw speed and screw back pressure on ABS plastic extrusion
Screw speed and screw back pressure are the first two of the five main process control factors for ABS engineering plastic extrusion molding. The details are described below: The five major process elements to be controlled by ABS engineering plastics extrusion molding: screw speed. The rotation speed of the screw is adjusted in the host control of the extrusion line. The speed of the screw ...
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A variable sampling interval S2-EWMA control chart for monitoring the process variance
This paper proposes a Variable Sampling Interval version of the Fixed Sampling Interval S2-EWMA control chart developed by Castagliola (2004) and dedicated to the monitoring of the sample variance of a process. In this paper, we explain how the various parameters of this VSI S2-EWMA control chart can be computed and how the use of the VSI feature significantly improves the statistical efficiency ...
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