PMA have been awarded a very large instrumentation contract with SWW for Colour anf Turbidity monitoring using Zullig and S::CAN products. This is the culmination of a lot of trails and development work between PMA, SWW and May Gurney.

S::CAN Color::lyser

Zullig Turbidity.

PMA has been successful in winning a large reagents supply contract for AWS. This involves the supply of analyser reagents and buffers and will also involve the recyclling of used reagent containers. PMA has a licenced recycling facility at its Huddersfield base specifically to accomodate used reagent bottles.

PMA is an ISO14001 company

S::CAN are introducing a new generation of analyser which is the new Con::cube. This is a revolutionary new interface development for S::CAN and will be used on the biggest water project ever in the UK.

The interface is very simple to use and not disimilar to the type of interface found on modern mobile phones, simple, graphically lead and intuitive. As with all S::CAN devices IP/over Internet is standard option and Profibus DP plus 4-20mA outputs are available for up to 8 sensors (more is possible)

The interface sports full graphical displays by parameter, groups of parameters, time and can have features added such as sensor and signal valideation, maintainance alearts, remote access and much much more.

Call PMA for more details.

PMA IS TRUELY A QUALITY SUPPLIER!

Process Measurement & Analysis Ltd has been awarded ISO14001 accreditation in May 2010 and passed with flying colours. This means that we now have accreditations for both main quality and environment areas ISO9001-2008 and ISO14001.

Overview

com::pass is an advanced coagulant control system, suitable for use with any metal based coagulant. It uses the on-line measurements of inlet water turbidity and UV-VIS spectral analysis provided by the s::can spectro::lyser^TM to predict the coagulant dose required to achieve treatment aims.

com::pass can be set by the user to operate in either conventional coagulation mode which will achieve particulate removal targets in the most economic manner, or in enhanced coagulation mode which will provide the maximum removal of natural organic matter (NOM).

com::pass runs as an application within the s::can con::stat^TM unit, which generates an output of the required coagulant dose for input in to the plant control system. This form of process control is referred to as “Feed Forward” or “Predictive” control. It is a proactive means of process control since the plant is being told how to operate based on a measurement of inlet conditions.

Feed forward control offers many advantages over the more traditional “Feedback” control method, which is reactive. In feedback control the plant measures the response after coagulant dosing and reacts to deviations from a set point. In Feed forward control the coagulant dose is unaffected by fluctuations in coagulation pH, by sample lag times or by coagulant mixing issues. The only variables affecting the coagulant dose are inlet water quality variables. This means that Feed Forward control responds instantly to changes in inlet conditions. It also means the coagulant dose will have fewer fluctuations and will be more stable.

The tighter process control provided by com::pass means that coagulant doses can be reduced by greater than 15% when operating in conventional mode. It also results in more stable plant performance. When operating in enhanced mode the removal of coagulable organics across the plant is maximized in the most cost effective manner and this can reduce the likelihood of forming disinfection by-products (DBPs).

Development

com::pass was developed in New Zealand by h₂ope Controls Ltd, Greater Wellington Regional Council and DCM Process Control Ltd. The first full-scale installation was at the Wainuiomata WTP in Wellington (August 2006). Since then com::pass has been installed in multiple plants in New Zealand and Australia. The plants cover a range of process technologies, capacities, coagulants and source water type.

Availability in UK

The agents for s::can and com::pass in the UK are Process Measurement and Analysis (PMA) Ltd.

Model range

Com::pass is currently available in three models. A further model, com::pass +, is in development.

com::pass+ incorporates a second s::can spectro::lyser which samples water before and after chlorination. This system is designed to have a feedback component that will enable plant operation to be dynamically adjusted to achieve maximum THMFP and HAAFP removal or a specified TOC/DOC % removal target. The system also incorporates an on-line measurement of THM formation in the chlorination process (by measuring differential spectra at 272nm).

Calibration

com::pass has two methods of calibration. It comes pre-installed with a generic water type global calibration that will work as a plug and play controller to predict a coagulant dose that will meet most treatment aims. Alternatively, a local calibration can be developed for a given site and/or source water based on historical data and plant performance. This will ensure that optimum coagulant doses are predicted at all times.

In order to perform a local calibration we require data from a s::can UV-VIS spectro::lyser and plant SCADA data covering a period that incorporates significant changes in source water quality. A 3 month period is usually sufficient for a local calibration. The s::can UV-VIS spectro::lyser can be leased from the local agent, purchased or a client may already have a spectro::lyser for source water contaminant alarming.

Process Measurement & Analysis Ltd will be at WWEM 2010 exhibition stand number 12. November 10th and 11th

PMA will be exhibiting a number of new waste and waste water instruments and technologies from S::CAN, Tytronic’s, Rhosonics and MicroLAN. Also we will be showing the new COMPASS ADVANCED COAGULATION SYSTEM in conjunction with the S::CAN Spectro::lyser.

NEW TECHNOLOGY – NEW IDEAS – NEW SOLUTIONS

The Solucomp 1055 and 399 family of pH probes can be supplied with MCERT certification for online pH monitoring applications. Please call PMA for details.

S::CAN Ammo::lysers and Spectro::lysers are being used widly in the UK for monitoring both municiple and industrial effluents/influents. S::CAN systems monitor TOC/COD/BOD/TSS/Nitrates/Turbidity/H2S/Ammonia/pH/Temp/Potassium etc. Finger pinting possible and remote access to data.