Floating Cover Design Technology over the Past 30 Years

摘要

Geomembrane floating covers have been used for over 30 years now in applications such as potable waterrnsystems, anaerobic digesters, deicing fluid covers at airports and odor control. The actual design of floatingrncover systems has changed dramatically in the past 30 years. Some of the first floating cover designs did notrntie down to the lagoon/tank perimeter and therefore rainwater was not diverted. This increased the treatmentrncosts in both anaerobic and potable water systems. Current floating cover design can incorporated rainwaterrncollection systems, active pumping and discharge collection systems, maintenance walkways and accessrnhatches. Also, with renewable energy a current hot topic, most of the newer anaerobic floating covers usernmethane collection systems to be blended with natural gas, etc. to create electricity and sold back to the electricrngrid. As a result, many of these floating cover systems can pay for themselves within 4 or 5 years.