There are many methods for aerating a lagoon or basin:
Ponds or basins using floating surface aerators achieve 80 to 90% removal of BOD with retention times of 1 to 10 days. The ponds or basins may range in depth from 1.5 to 5.0 metres.
In a surface-aerated system, the aerators provide two functions: they transfer air into the basins required by the biological oxidation reactions, and they provide the mixing required for dispersing the air and for contacting the reactants (that is, oxygen, wastewater and microbes). Typically, the floating surface aerators are rated to deliver the amount of air equivalent to 1.8 to 2.7 kg O2/kWh. However, they do not provide as good mixing as is normally achieved in activated sludge systems and therefore aerated basins do not achieve the same performance level as activated sludge units.
Biological oxidation processes are sensitive to temperature and, between 0 °C and 40 °C, the rate of biological reactions increase with temperature. Most surface aerated vessels operate at between 4 °C and 32 °C.
Experimental study of the mechanical anisotropy of aerated concretes and of the adjustment parameters of the introduced porosity.
Jun 01, 2006; Abstract The aerated concrete manufacturing process consists in the creation of macro porosity in a micro-mortar matrix...
Wipo Publishes Patent of Youn Hum Yeon for "Apparatus and Method for Manufacturing a Composite Panel Using Aerated Light Concrete and Composite Panel Using Aerated Light Concrete Manufactured Using the Apparatus and Method" (South Korean Inventor)
Dec 17, 2012; GENEVA, Dec. 17 -- Publication No. WO/2012/169765 was published on Dec. 13.Title of the invention: "APPARATUS AND METHOD FOR...