System and method for removal of volatile hydrocarbons from a water stream

A system for separating a volatile hydrocarbon from a water stream comprising:

• a lead mixer-injector device configured to receive an untreated water stream including a volatile hydrocarbon, inject compressed air into the untreated water stream and mix the injected air with the untreated water stream to form a first injected fluid stream;
• a shear mixing device configured to receive the first injected fluid stream from the lead mixer-injector device and shear gas bubbles within the first injected fluid stream so that a frothed stream is formed;
• a lead degas separator configured to receive and separate the frothed stream from the shear mixing device into a volatile hydrocarbon stream and a partially treated water stream based on difference in density;
• a compressor configured to direct clean and oil free compressed air to the lead mixer-injector device;
• a lag mixer-injector device configured to receive second compressed air and the partially treated water stream from the lead degas separator including a remaining volatile hydrocarbon, inject the second compressed air into the partially treated water stream and mix the second injected air with the partially treated water stream to form a second injected fluid stream;
• and
• a lag degas separator configured to receive and separate the second injected fluid stream from the lag mixer-injector device into a second volatile hydrocarbon stream and a treated water stream based on a difference in density.