The goal of wastewater treatment is to accelerate the natural processes that purify water. Waste treatment is divided into two stages: primary and secondary. Solids are allowed to settle and are removed from the wastewater during the primary stage. The secondary stage purifies wastewater further using biological processes. These processes require numerous industry tools and large water containers to be transferred from one location to another for packing and other processes. Rexellos offers a wide range of high-performance trolley-style water bottle containers as well as a variety of other options such as low-cost, light-duty, medium-duty, heavy-duty, super-heavy-duty wheels castors and more.