Combination of a DAF unit and a belt filter press in a tomato caning factory

Tomato canning factory was considering the realization of one treatment for its polluted effluents to protect the natural environment and contacted EMO to assist them in their project. Polluting loads were established upon flow in peak period of production, and concentrations in polluting elements result from measurement carried out on rejections coming from a factory having the same type of production.
EMO then  recommended to carry out a first phase of work consisting of a thorough pretreatment allowing one reduction of more than 50% of organic pollution (COD and BOD5) and of more than 90% as of  Suspended Solids (SS). While waiting for the second phase of work which will allow a higher warranty of treatment between 95% and 98% on organic pollution, the effluents could be used in irrigation of the agricultural parcel located near the factory.

For this first phase of work we selected a solution  being integrated as well as possible in the site existing and sufficient leaving place available for the future extensions of the treatment unit.
Second phase consists in the installation of one belt filter press on site to dewater part of collected sludge and to limit the number of  journeys made by tank trucks for the evaucation of collected sludge. After the installation of this treatment unit, collected sludge will be dewatered on a belt filter press supplied by EMO. Sludge will then be recycled  either for nutritive complement for agriculture, or evacuated to landfill sites.  The installation of a belt filter press makes it possible reducing by 3 to 4 the volume to be evacuated.  Sludge becomes suitable for shovelling with one concentration around 180 g/l