There are many simple measures that businesses in the fish processing industry can implement to reduce water use and effluent (liquid waste) production. These include the following:
- Reduce excessive use of water – eg water running when not required and excessively high flow rates. You should switch off the water until it is needed, control the flow rate – eg by using flow regulators – and carry out simple maintenance.
- Reduce effluent strength caused by fish waste in contact with water. You should separate fish waste from water as soon as possible and contain waste to keep it off the floor. Do not hose waste into the drain.
- Optimise water use during spraying with high pressure, low volume spray heads. Ensure that the spray head is directed onto the appropriate section of the process. Provide an accessible control for switching off the system and do not overuse sprays.
- Both pipes and flexible hosing can leak, leading to losses of vast amounts of water. Regularly check these for leaks and ensure hoses are properly connected.
- Reduce water used for processing. This will reduce your effluent volumes and trade effluent charges.
- Prepare the piping. Before using water, you should first clear the line with low pressure air (if available) or a pigging system. This will reduce the quantity and strength of the effluent.
- Reduce spills. You should ensure spillage trays and troughs are provided and located in appropriate areas to contain spills and reduce water wastage.
- Avoid defrosting with water. You should consider a system that does not use water. Some defroster designs are available that thaw in air.
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