| 摘要 |
In another form of the invention, there is provided a system for treating a manure slurry, comprising: a manure lagoon comprising: a lower anaerobic stratum comprising anaerobic microbes; an upper aerobic stratum comprising aerobic microbes; and an intermediate facultative stratum comprising facultative microbes. In another form of the invention, there is provided a system for treating a manure slurry, comprising: a manure lagoon comprising: a lower anaerobic stratum comprising anaerobic microbes; and an upper aerobic stratum comprising aerobic microbes. In another form of the invention, there is provided a system for treating a manure slurry, comprising: a manure lagoon comprising: an aerator for creating an aerobic stratum within only a portion of the manure slurry. In another form of the invention, there is provided a method for treating a manure slurry, comprising: creating a manure lagoon comprising: a lower anaerobic stratum comprising anaerobic microbes; an upper aerobic stratum comprising aerobic microbes; and an intermediate facultative stratum comprising facultative microbes. In another form of the invention, there is provided a method for treating a manure slurry, comprising: creating a manure lagoon comprising: a lower anaerobic stratum comprising anaerobic microbes; and an upper aerobic stratum comprising aerobic microbes. In another form of the invention, there is provided a method for treating a manure slurry, comprising: creating a manure lagoon comprising: an aerator for creating an aerobic stratum within only a portion of the manure slurry. In another form of the invention, there is provided a method for fertilizing crops, comprising: creating a manure lagoon comprising: a lower anaerobic stratum comprising anaerobic microbes; and an upper aerobic stratum comprising aerobic microbes; withdrawing from the manure lagoon at least a portion of the upper aerobic stratum; and distributing the withdrawn portion of the upper aerobic stratum on the area containing the crops. In another form of the invention, there is provided a depth-adjustable, fine bubble, surface layer aeration unit for aerating a selected portion of a fluid body, comprising: a body comprising at least one hollow internal structure; an air inlet communicating with the at least one hollow internal structure, whereby air from an external air source may be introduced into the at least one hollow internal structure; at least one fine bubble aerator communicating with the at least one hollow internal structure, whereby air from the at least one hollow internal structure may be released through the at least one fine bubble aerator into an adjacent fluid; and at least one weight pod attached to the body, wherein the at least one weight pod comprises structure for adjusting the weight of the at least one weight pod, whereby the buoyancy of the aeration unit may be adjusted so as to permit the at least one fine bubble aerator to be positioned at a desired depth in a fluid body. In another form of the invention, there is provided a method for aerating a surface layer in a stratified liquid body, comprising: providing a depth-adjustable, fine bubble, surface layer aeration unit comprising: body comprising at least one hollow internal structure; an air inlet communicating with the at least one hollow internal structure, whereby air from an external air source may be introduced into the at least one hollow internal structure; at least one fine bubble aerator communicating with the at least one hollow internal structure, whereby air from the at least one hollow internal structure may be released through the at least one fine bubble aerator into an adjacent fluid; and at least one weight pod attached to the body, wherein the at least one weight pod comprises structure for adjusting the weight of the at least one weight pod, whereby the buoyancy of the aeration unit may be adjusted so as to permit the at least one fine bubble aerator to be positioned at a desired depth in a fluid body; connecting an air source to the air inlet, and positioning the unit in a fluid body; and adjusting the weight of the at least one weight pod, so as to position the at least one fine bubble aerator within the surface layer of the stratified liquid body.
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