PODCAST: Proper Drainage and Venting of Geosynthetic Barrier Systems

On by Geosynthetica
News and Articles

The field of geosynthetics has seen a strong increase geomembrane performance debate. The topics have looked roundly at performance in exposed environments, in buried service conditions (e.g., landfill lining), from installation perspectives, and much more. The Berlin 2 think-tank gathering in 2014 on HDPE geomembranes, Queen’s University’s barrier studies, and the Geosynthetic Institute’s ever-gr... »

Drainage and Venting of Geosynthetic Containment Systems

On by Geosynthetica
News and Articles

The recent increase in discussion on finer points to geomembrane installations (e.g., managing geomembrane wrinkling) has us revisiting stories on other significant points regarding geomembrane system performance. Here, we look at an article authored by Andrew Plowman (Varicore) about the importance of proper drainage and venting design and how it impacts the integrity of geosynthetic containment ... »

Avoiding Whales in Anaerobic Digesters

On by Geosynthetica
News and Articles

By Ian D. Peggs, P.E. – In 2014, shortly after being placed in service, one of two geomembrane-lined and covered anaerobic digesters generated extensive whales—“bubbles” in the lining system. Attempts to remove the apparent gas from under the cover were made unsuccessfully until it was realized that the cover was being uplifted by gas under the liner. Within two or three days, there were whales se... »

Slideshow of Whales in Geomembrane Lining Systems

On by Geosynthetica
News and Articles

A slideshow of whales in geomembrane lining systems. When gas gets under a geomembrane, bubbles–or, “whales”–can form. A number of reasons may be responsible, such as installation damage, poor seaming, or a lack of appropriate construction quality assurance (CQA) measures like liner integrity surveys. Whales can impact wastewater facilities, manure lagoons, effluent ponds, ... »