New Toolbox Content Available in German Language: Aquifer Recharge and Biowaste Usage This post is also available in: Deutsch (German) On the HOOU website new content in German is available again today: The RUVIVAL Toolboxes on the topic of Aquifer Recharge and Biowaste Usage. Enjoy learning! Aquifer Recharge replenishes ground water. Biowaste Usage utilises biodegradable material.