In the case study described below, the advantages of multiparameter gas analysers from Quantitech are exemplified as a result of the variability in materials being incinerated at some of the UK’s main Waste to Energy Plants and the need to measure extremely low concentrations in the resulting off-gases.
Waste materials are combusted at very high temperatures. A range of abatement equipment then removes contamination from the resulting exhaust gases and a continuous emissions monitoring system (CEMS) provides regulatory evidence that pollutant concentrations do not exceed prescribed limits, as per the plant’s Permit.
Catalyst Environmental was recently contracted to undertake compliance monitoring on an incinerator stack for a broad range of parameters and, at the same time, to conduct a QAL 2 calibration of the CEMS, following the requirements of BS EN 14181.
James Harmer, Catalyst’s Technical Manager, explained the monitoring process: “Over a period of four days we collected data using a Gasmet DX-4000 analyser to enable us to perform the calibration of the onsite CEMS as well as taking further samples for the routine compliance testing, which included Dioxins & Furans, PCBs, PAHs and Heavy Metals.”
'We operate two different multiparameter gas analysers from Quantitech; the Horiba PG-250 and the Gasmet DX-4000, both of which are fully portable and MCERTS certified. The decision as to which analyser to employ depends on the range of parameters to be measured and the required resolution. In this instance, we chose the DX-4000 because it is able to measure a much broader range of parameters and because it meets the resolution requirements for this site's Permit.'
The PG-250 is a portable stack gas analyser that can simultaneously measure up to five separate gas components using the same standard reference measurement methods employed in permanently installed CEMS. These include NDIR for CO, SO2, and CO2, Chemiluminescence for NOx, and a Zirconium Oxide Cell for O2 measurements.
The Gasmet DX-4000 is also a portable MCERTS certified multiparameter gas analyser. However, employing advanced FTIR technology, it is able to measure up to 300 parameters and other gases can be added for future applications at little or no extra cost. This means that monitoring performed with the DX-4000 is 'future-proof' because historical monitoring data can be analysed at any stage to measure new parameters.
Commenting on the value of the FTIR analyser, James Harmer said, “The Gasmet DX-4000 has been a great addition to our range of stack emissions monitoring equipment. It is portable, easy to use for suitably qualified personnel and ideal for this type of application. Quantitech have also provided us with excellent technical back-up and support since purchasing the instrument.”
'The flexibility of the DX-4000 is important for us because it can be utilised in such a wide range of sites to measure an enormous range of parameters. The instrument is quick to set up, calibrate and run. This means that our time on site is minimised, which helps to reduce costs for our clients.'
Catalyst Environmental is a relatively new business, but Managing Director, Alastair Wolff, says, 'We are the fastest growing company in our sector, and one of the few to offer a truly nationwide service from a number of UK locations. We employ some of the best MCERTS certified Team Leaders in our industry, and have in place one of the most experienced management teams in our industry. We have a clear focus on customer service, a competitive pricing policy, and a genuine commitment to quality and technical excellence.'
Operating across the UK, Ireland, and overseas, Catalyst Environmental prides itself on the flexible, friendly approach of its staff, and boasts one of the most extensive UKAS MCERTS accreditation schedules, including FTIR.
Summarising, the advantages of the FTIR system employed by Catalyst Environmental, Quantitech's Dominic Duggan says, 'Historically, it would have been very expensive to have purchased analysers for all of the main measurands and almost impossible to have monitored all of the parameters continuously. However, as an MCERTS certified portable FTIR analyser, the DX-4000 provides Catalyst with the ability to monitor almost anything in almost any situation.'