The effectiveness of polymer addition to the aeration tank effluent prior to sludge flotation as practiced in a slaughterhouse wastewater treatment plant.

The environmental quality of composting means both the capacity to produce composts of high environmental and agronomic quality, and no health or environmental impact of the process.

The production of organic wastes is growing world-wide, while agricultural soils are witnessing a progressive reduction in their organic content.

As a result of intensive sponsorship and both scientific and commercial research efforts, biologically degradable polymers (BDP) have been developed in the last few years to be ready for practical utilisation. The application of BDP for packaging purposes was considered to be the most practical area for their use.