CHEMICAL OXYGEN DEMAND (COD)
COD relates to almost anything containing a carbon atom – in simple terms, this includes anything that has lived or is alive and therefore food and drink ingredients, paper, plastic, leather, pharmaceuticals etc.
There is always a consent level for COD when discharging trade effluent, this must be met to avoid potential prosecution and associated fines.
COD also forms part of the MOGDEN formula – the method used to calculate your trade effluent charges when discharging to a water company.
Therefore, reducing COD to meet consent has a direct cost saving against the MOGDEN formula – this is how we can help you meet consent whilst generating a return on investment!
There are two types of COD:
- insoluble COD - which can be removed via filtration and/ or flotation and/ or settlement
- Soluble COD – this is dissolved and cannot be seen by the naked eye and requires biological treatment to be removed from water
Note – when discharging to a water course, Biological Oxygen Demand (BOD) is often quoted.