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This is why low speed surface aerators are mostly used in sewage or industrial treatment as WWTP [clarification needed] are bigger and sparing energy becomes very interesting. Biological oxidation processes are sensitive to temperature and, between 0 °C and 40 °C, the rate of biological reactions increase with temperature.
The American Tree Farm system is an organized collection of private landowners interested in effectively managing their woodland properties. Founded in 1941, the ATFS consists of more than 27,500,000 acres (111,000 km 2 ) of privately owned forest in 46 states.
The effectiveness of a surface aerator is limited to a small area as they are unable to add circulation or oxygen to much more than a 3-metre radius. This circulation and oxygenating is then limited to the uppermost portion of the water column, often leaving the bottom portions unaffected. Low speed surface aerators can also be installed on floats.
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Facultative lagoon (polishing pond) providing tertiary treatment after a constructed wetland in Hamburg-Allermöhe, Germany. Overflow from the facultative lagoon may be routed through one or more polishing ponds supporting lower populations of anaerobic micro-organisms and a higher proportion of aerobic organisms adapted to survival in lower concentrations of organic material.
The forced-labor farms of Leon County were numerous and vast. Leon County , Florida , was a hub of cotton production. From the 1820s through 1850s Leon County's fertile red clay soils and long growing season attracted cotton planters from Georgia , Virginia , Maryland , North and South Carolina , among other states as well as countries abroad.
Orchard Pond Plantation was a large forced-labor farm originally growing cotton on 8754 acres, (35 + 1 ⁄ 2 km 2) developed and owned in the 19th century by Richard Keith Call, attorney, planter and future Territorial Governor, in what is now northwestern Leon County, Florida, United States. In 1860 he owned 118 slaves to work the 1300 acres ...
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