Trade effulent consent & negotiation/cost reduction
Discharging effluent attracts high charges
Water Companies make assumptions & can be wrong
Make sure you are not paying more than is needed
Trade Effluent
The cost of collecting, treating and disposing of trade effluent depends on the volume of effluent discharged and the strength of the waste water. Water Companies assess the volume and strength of trade effluent before it enters the sewers.
Calculating charges for trade effluent
Charges are based on Mogden formula. This takes into account the following relevant costs:
- Collection
- Primary treatment
- Biological treatment
- Treatment and disposal into the sea
- Biological oxidation of settled sewage
- Treatment and disposal of primary sludge
The formula takes into account the level of treatment needed for trade effluent from a particular customer. This means that customers pay less for waste water that is cleaner. This means properly knowing how 'clean' your effluent is potentially makes a real difference to your final bill.
As each company calculates the average costs for its region, charges do not reflect the costs incurred at any one treatment works. Companies may reduce the collection charge for customers who discharge directly to the treatment works.
Mogden formula
Charges for trade effluent are based on the Mogden formula, which is charge per unit of effluent = R + [(V + Bv) or M] + B(Ot/Os) + S(St/Ss)7
R = reception and conveyance charge [p/m3]
V = primary treatment (volumetric) charge [p/m3]
Bv = additional volume charge if there is biological treatment [p/m3]
M = treatment and disposal charge where effluent goes to sea outfall [p/m3]
B = biological oxidation of settled sewage charge [p/kg]
Ot = Chemical oxygen demand (COD) of effluent after one hour quiescent settlement at ph 7
Os = Chemical oxygen demand (COD) of crude sewage one hour quiescent settlement
S = treatment and disposal of primary sewage sludge charge [p/kg]
St = total suspended solids of effluent at ph 7 [mg/litre]
Ss = total suspended solids of crude sewage [mg/litre]
WMS UK has helped its many clients achieve millions of pounds in refunds and savings through water and sewage overcharges. Are you being overcharged for these services? Let our experienced team answer this question quickly and efficiently for you at no risk.
