Continuous water quality measurement
Reliable process monitoring and control is an important aspect of food and drink manufacturing. Continuous water quality measurement may be performed throughout the production process; to manage associated waste streams and to maintain compliance of trade and surface water discharge, across the manufacturing site.
Production Water Quality
Image: Installation for Heineken of Protoc TOC analsyers pre-installed by PPM
Water received from a local water authority or abstracted from a river / site borehole often needs to be monitored to ensure it meets stringent water quality standards and has not been contaminated. The Protoc Total Organic Carbon (TOC) analyser has been installed at multiple drink manufacturers to continuously monitor towns water for organic loading which can taint the taste of make-up water. In addition to the Protoc TOC analyser, the Proam ammonia monitor has also been installed at Distilleries abstracting river water, to ensure water quality has not been affected by ingress of pollutants such as sewage.
Cleaning In Place (CIP)
The integration of pH and conductivity instrumentation to monitor and control the “Cleaning In Place” process and recover wash-water containing acids and alkalis, is well established in the food and beverage sector. The use of pH meters to accurately control dosing of acid and bases is also advantageous.
Product Loss Monitoring
The integration of continuous monitoring in production areas can be used to identify product loss in real time. Instrumentation to monitor drains within bottling plants, after fermenters and post CIP has been used to identify when product loss has occurred. Events can be alarmed in real-time by instruments such as the Protoc Total Organic Carbon analyser, so corrective action can be immediately taken.
Image: Floor drains in production areas can be monitored for product loss
Industrial Trade Discharge
Waste-water generated from production often needs to be monitored to ensure compliance to a number of imposed consents which may include flow, pH, suspended solids, ammonia, COD and BOD. The number and required parameter selection is determined by the type of manufacturing process and the risks associated with waste product carry-over. Progressively, industry is looking to minimise their waste and reduce their associated effluent costs by continuously monitoring and treating, prior to trade discharge.
The Protoc TOC analyser continuously reports the Total Organic Carbon concentration which provides a good indication of the Chemical Oxygen Demand allowing for real-time monitoring and control of waste streams. The Protoc instrument has been installed for a number of leading Brewing companies, Drinks manufacturers, Poultry and Food manufactures to control the treatment process and demonstrate trade discharge compliance.
Image: Continuous measurement of treated effluent within the Food manufacturing sector
The measurement of pH may also be installed to ensure pH regulation is correctly performed and discharge compliance is maintained.
Where treated effluent is discharged to a local water course Ammonia, Suspended Solids (Turbidity) and BOD (Biological Oxygen Demand) may be monitored and controlled in real-time, using on-line water quality instrumentation supplied by PPM.
Surface Water Monitoring
Hard standing areas across the site often generate significant surface water which is typically discharged to a local water course. Finished product, waste and fuel ingress in to the site drainage system can affect surface water quality. Continuous water quality measurement may be used to identify pollution events and linked to control systems, to avert discharge of poor surface water quality. Instrument such as the Protoc Total Organic Carbon (TOC) analyser can be used to identify ingress of organic contamination within the water drainage system and control abatement systems.
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