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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 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 ).
Caulerpa lentillifera is also eaten in Vietnam, where it is known as rong nho or rong nho biển, meaning "grape algae" or "sea grape algae"; [15] in Korea, where it is known as bada podo (바다포도), also meaning "sea grapes"; and in Indonesia (particularly Bali), where it is known as bulung.
Settling basins are ponds constructed for the purpose of removing entrained solids by sedimentation. [2] Clarifiers are tanks built with mechanical means for continuous removal of solids being deposited by sedimentation; [3] however, clarification does not remove dissolved solids. [4]
Algae, including both phytoplankton and periphyton, are the principle photosynthesizers in ponds and lakes. [8] Phytoplankton are found drifting in the water column of the pelagic zone. Many species have a higher density than water, which should cause them to sink inadvertently down into the benthos .
You may have seen a plethora of supplements cropping up at pet stores, and on websites selling CBD products, and wondered if they have any value to your cat. The market for pet CBD products has ...
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