A Athos™ Athos™ is a sludge hydrothermal oxidation (HTO) process that turns organic sludge with low dry matter into an essentially solid mineral. Sludge treatment C CaptuRO™ CaptuRO™ is a high-recovery reverse osmosis technology designed specifically to extract purified water from industrial, brackish and wastewater sources. Membrane Filtration - reverse osmosis