Severn Trent Water Ltd. has reviewed the performance of its existing odour control technology and conducted trials with new technology. Processes were then selected for a costing exercise for air flow rates and odour concentrations typically found at sewage treatment works. The most cost effective processes for various applications are outlined.
Odour pollution is traditionally categorised as a public health issue, controlledv, ia statutory legislation with the emphasis on control rather than prevention. As society demands a higher quality environment, odour pollution increases in importance as an amenity issue. Planning authorities can refuse planning permission on the grounds that the odour nuisance from the proposed development will be detrimental to the amenity of the area. Planningauthorities are therefore in the unique position of being able to prevent odour pollution. Potential odour polluters are under increasing pressure to demonstrate to planning authorities that odour has been minimised as far as possible. The communication of technical odour control data and assessments, through mechanisms such as Environmental Impact Assessments (EIA), is becoming an important part of the decision making process. The lack of specific odour policy and guidance within the planning arena is highlighted. The reconstruction of Derby Sewage Treatment works (STW) is used a a case study to highlight how a technical assessment of odour emissions, using the WRc Sewage Treatment Odour Production (STOP) Model can be successfully used within the planning arena to achieve planning permission with no additional conditions.
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