The present disclosure relates to a system and method for treating wastewater, the method comprising the steps of: providing a vessel for receiving wastewater and a gas, wherein the gas comprises one or more constituent gas components; directing the wastewater and a first gas component of the gas to the vessel; reducing the temperature of the contents of the vessel from a first temperature to a second temperature to facilitate the formation of clathrate hydrates comprising the wastewater and the first gas component; increasing the temperature of the contents of the vessel with respect to the second temperature to facilitate melting of the clathrate hydrates; and removing clean water and/or the first gas component from the vessel.

A nanobubble generating device includes a tubular structure and open channels. The tubular structure has an inner surface. The tubular structure defines an inlet port and an outlet port on opposing ends of the tubular structure for enabling fluid flow through the device. The open channels are disposed on the inner surface of the tubular structure. The open channels extend along at least a portion of a length of the tubular structure between the inlet port and the outlet port. A fluid is flowed across the open channels. Nanobubbles are generated in the fluid in response to flowing the fluid across the open channels.

A nanobubble generating device includes a tubular structure and open channels. The tubular structure has an inner surface. The tubular structure defines an inlet port and an outlet port on opposing ends of the tubular structure for enabling fluid flow through the device. The open channels are disposed on the inner surface of the tubular structure. The open channels extend along at least a portion of a length of the tubular structure between the inlet port and the outlet port. A fluid is flowed across the open channels. Nanobubbles are generated in the fluid in response to flowing the fluid across the open channels.