This project, originally proposed in the Summer 2004 Portfolio brochure, was refocused during an Odours Workshop in December 2004. The project will now investigate direct measures (agents / additives) for reducing odours from wastewater processes and sludge, which could have immediately implementable benefits. The project has 2 phases:
In Phase 1, experience and effectiveness of agents, used in the UK / internationally, will be compiled. This includes: the range of agents (from lime through to the most esoteric compounds); usage in various wastewater processes and sludge applications (e.g. dosing sewers / treatment processes, sludge applications, aerial spraying); and success in odour prevention, reduction or masking. Agents will be ranked for likelihood of success, cost / benefits and longevity of solutions in reducing odours.
Protocols for characterising odour / quantifying odour emissions will also be evaluated. This will include the 'Bag Test', developed for handling sludge in an earlier collaborative project CP149, plus the amounts of additive used per mass value of sludge.
In Phase 2, the most successful agents will be tested using laboratory tests and/or field trials to evaluate their immediate use in reducing / preventing / masking odours. The protocols will be refined so Utilities can quickly eliminate less successful odour control agents and concentrate on testing better potential solutions.
- Reduced risk of odours and the use of cost effective methods for dealing with odours
- Rapid, cheap assessment of the efficacy of odour alleviating agents offered by suppliers to enable concentration-on-application regimes for those judged to be effective
- Demonstration to regulators / Environmental Health Officers / the Public that cost effective solutions to odours are being actively sought.