Patent ID: 7267766
Filing Date: 2007-09-11
Classification: B01F,C02F,Y02W

Abstract:
1. A method for aerating a particular stratum in a multi-stratum liquid body, wherein the multi-stratum liquid body comprises a lower anaerobic stratum comprising anaerobic microbes, an upper aerobic stratum comprising aerobic microbes, and an intermediate facultative stratum comprising facultative microbes, the method comprising: providing a depth-adjustable, fine bubble, surface layer aeration unit comprising: connecting an air source to the air inlet, and positioning the aeration unit in the multi-stratum liquid body; adjusting the weight of the at least one weight pod, so as to position the at least one fine bubble aerator entirely within, but only within, the upper aerobic stratum of the multi-stratum liquid body; and passing air into the air inlet and out of the at least one fine bubble aerator so as to aerate the upper aerobic stratum without aerating the lower anaerobic stratum and the intermediate facultative stratum.