Trade Effluents

DISCHARGE CONSENTS PeiTuission to discharge trade effluent directly into controlled waters is given by the National Rivers Authority in the form of a discharge consent which will specify amounts and conditions. Discharges to public sewers are controlled by discharge consents by one of the ten Water Service Companies. 

TRADE EFFLUENT Any waste water released from an industrial process or trade premises with the exception of domestic sewage. 

SI 1989/1156 Trade Effluents (Prescribed Processes and Substances) Regulations... 

SI 1992/337 Surface Waters (Dangerous Substances) (Classification) Regulations SI 1992/339 Trade Effluent (Prescribed Processes and Substances) Regulations SI 1994/1057 Surface Waters (River Ecosystem) (Classification) Regulations... 

Sets out the powers and duties of Statutory Undertakers (SUsJ with regard to water supply, the provision of sewerage services and consent requirements for the receipt of trade effluents. 

Trade effluents may be discharged to the municipal sewers, to surface waters or on or into the land. Discharges to surface waters, including estuaries and coastal waters, or into the land, are controlled by means of Consents to... 

Discharge with the EPA and Agreements with the water companies. Discharges to controlled landfill sites are by agreement with the local waste disposal authority. In all cases the Consents and Agreements will impose conditions on the quantity, rate of discharge and chemical composition of the trade effluents acceptable for discharge. 

Ot = the chemical oxidation demand (COD) of trade effluent after one hour settlement at pH 7 (mg/1). 

However, all of the functions in the formula, excluding the trade effluent functions Ot and Os, are different for each of the water companies and are reviewed annually. Therefore the unit costs of charges vary between the companies. Subject to other commercial considerations, the cost of trade waste charges could influence the water company area in which to locate an industrial plant. The conditions imposed in the Consent to Discharge could influence the location within an area most beneficial to plant location. 

Discharge of trade effluent into a sewer requires a consent from the Sewerage Undertaker under a procedure set out in the Public Health (Drainage of Trade Premises) Act 1961, Control of Pollution Act 1974 and Water Act 1989. The Environmental Protection Act 1990 is also applicable to prescribed processes and substances. 

Special provisions control specific dangerous substances likely to pass through the system into the natural environment. These Red List substances are defined in the Trade Effluents (Prescribed Processes and Substances) Regulations 1989 and shown in Table 13.18. 

Effluents, See also Pollution Trade effluent Waste consent conditions. See Discharge consents control, 529... 

Yorkshire Water Authority (1971) Determination of Herbicides in Sewage and Trade Effluents (1971). Method YWA 670-01. 

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