To treat agricultural wastewater, jack has built a lagoon that gets oxygen from floating surface aerators or submerged diffusers. it requires less land space, is 6 to 20 feet deep, and has a detention time of 5 to 20 days. which type of lagoon has jack built? a. partial-mix aerated lagoon b. anaerobic lagoon c. aerobic lagoon d. facultative lagoon e. completely mixed aerated lagoon

The correct answer is option (A)  partial-mix aerated lagoon.

Partial mix lagoons are used to treat municipal, agricultural and industrial wastewater. In these lagoons, the aeration is provided by either mechanical surface aerators or submerged diffused aeration system. The submerged systems include the perforated tubing or piping with a variety of diffusers attached to it. Mechanical aeration provides dissolved oxygen needed for the aerobic organisms in the lagoon for the conversion and oxidation of organic material in the wastewater. The depth of the lagoon is up to 20 feet.