Water/Wastewater
On-Line Organic Pollution Control
Jun 14 2010
AstraNet Systems Ltd (England) has made new installations of its popular organic water pollution control system. Their on-line spectrometer ensures immediate action can be taken to maintain control of water quality while also protecting valuable plant and equipment.
Naturally occurring and human-influenced pollution incidents can lead to a rapid increase in the organic content of surface waters. AstraNet state that their system, based on the UV absorbance of the water at 254nm, gives a more rapid indication of organic pollution than other methods that were primarily developed for laboratory analyses. With no moving parts and a rugged and durable optical system AstraNet also claim that their installations require little maintenance and have been proven as intake protection devices in many locations around the UK; including installations in all the treatment plants around Lough Neagh in Northern Ireland, the largest fresh water lake in Great Britain.
As well as the organics indicated at 254nm the AstraNet system outputs the absorbance at up to three other wavelengths enabling background colour and turbidity to be monitored as well. Enhanced sensitivity is offered by the long path length flow cell that has windows which are easily de-mounted for cleaning. The fibre optic link from the flow cell to the instrument enables flexibility in location and ease of access to all parts of the system.
Stand alone logging or control through SCADA/PLC systems is supported, following a simple set-up of sampling rate and wavelengths continuous, unattended operation can be instigated.
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