ABSTRACT
Odour problems are closely connected to sewage collection, treatment and sludge disposal. There are many reasons for this, like improper operation and design of the facilities.
Different methods are in use for avoiding the generation of odourous gases in sewage treatment systems. One of the most effective means are new operational routines like sewer cleaning programs, and odour reduction equipment at treatment plants.
Collection and treatment of the odourous air have proved to be very effective. Different methods are in use for reducing the odourous gases. A chemical scrubber or combustion effectively eliminates odours. The use of activated carbon filters will reduce odours, but filter media get saturated and require a total change or regeneration. Biological methods, for exemple a soil filter, for odour reduction have come into use in the last few years; mainly due to a simple and inexpensive design. The soil filter effectively reduces the odour and seems to have a relatively long lifespan. Iron oxide filters have also proven to reduce odours. Experience is limited with these filters, but so far they seem to be inexpensive and effective.
