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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.
Agricultural wastewater treatment is a farm management agenda for controlling pollution from confined animal operations and from surface runoff that may be contaminated by chemicals in fertilizer, pesticides, animal slurry, crop residues or irrigation water.
The system may consist of a single pond or several ponds in a series, each pond playing a different role in the removal of pollutants. After treatment, the effluent may be returned to surface water or reused as irrigation water (or reclaimed water) if the effluent meets the required effluent standards (e.g. sufficiently low levels of pathogens).
The Best Leaf Vacuums. Best Overall: Husqvarna 125BVx. Best Value: Black+Decker 3-in-1. Best Gas-Powered: Echo ES-250. Best Battery Powered: Greenworks 40V 505 CFM. Best Walk-Behind: Troy-Bilt CSV07B.
Wipe your hands clean of a daily and tedious chore with expert-recommended self-emptying robot vacuums from iRobot, SwitchBot, Ecovacs, and Shark.
Tested by cleaning experts, these are the best robot vacuums for carpet, hard floors, pet hair and more from top brands like iRobot's Roomba and Eufy. 5 Best Robot Vacuums of 2023, Tested by ...
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