Fine screening for submarine outfalls

摘要

In contrast to biological treatment systems, the mechanical treatment of wastewater represents a fast to implement and cost-effective solution for the removal of undissolved matter from wastewater flows. HUBER has developed a range of mechanical treatment solutions which can be tailored to meet specific cleaning targets and requirements situations. Especially the very cost-effective and easy to install fine screens can remove undegradable toilet and plastic particles along with organic material contained within the wastewater (shown by the example of the waste water treatment plant La Taboada). Furthermore the combination of very fine apertures (ultra-fine and micro screens) and precipitation/flocculation is able to significantly improve wastewater quality. A virtually solids-free effluent can for example be achieved with the use of micro screens (e.g. a disc filter) with apertures from 20 to 100 micron.