Can stored sludge cake be deodorised by chemical or biological treatment?

The storage of sludge cake provides an opportunity for septicity to develop , with attendant odours. Moreover, the odour prevention, containment and mi nimisation procedures used successfully in the rest of the works may not be adaptable to sludge storage and subsequent transport and disposal. Odours can be released throughout storage and, in addition, the subsequent movemen t of the cake can release high concentrations of odours which have accumula ted. This paper focuses on the use of five types of chemical and biological trea tment product to remediate odour in stored cake sludges: oxidising agents, bacteriological/enzymatic preparations, biological suppressants, nutrients, and odour neutralisers. Their action is described in terms of their effect s on the microbial population of the sludge, the types of odours they are d esigned to eradicate, and how they are used in practice.