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Viola palmata is native to southeastern Canada as well as the eastern half of the United States. [ 2 ] [ 3 ] Often confused with Viola triloba , V. palmata is a member of a class familiarly known as "blue stemless violets", characterized by its cleistogamous flowers on short prostrate peduncles , and often concealed under dead leaves or soil.
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.
Brine treatment systems are typically optimized to either reduce the volume of the final discharge for more economic disposal (as disposal costs are often based on volume) or maximize the recovery of fresh water or salts. Brine treatment systems may also be optimized to reduce electricity consumption, chemical usage, or physical footprint.
Raw water is generally unsafe for human consumption due to the presence of contaminants. A major health problem in some developing countries is use of raw water for drinking and cooking. [1] Without treatment, raw water can be used for irrigation, construction, or cleaning purposes. [2]
The flower of Viola reichenbachiana is bisexual, containing both male and female reproductive structures. [4] It has 3 or 5 narrow, non-overlapping petals that are a signature dull purple. [1] [4] The flower typically has 5 small, pointed sepals, 5 stamens, and 1 carpel. [1] These flowers can range from 1.5 to 2 cm across. [4]
Viola odorata is a species of flowering plant in the family Violaceae native to Eurasia. The small hardy herbaceous perennial is commonly known as wood violet , [ 2 ] sweet violet , [ 3 ] English violet , [ 3 ] common violet , [ 3 ] florist's violet , [ 3 ] or garden violet .
Since the systems are staged, the culture of the later stages can be acclimated to the slowly degraded materials. [8]: Ch 2 The discs consist of plastic sheets ranging from 2 to 4 m in diameter and are up to 10 mm thick. Several modules may be arranged in parallel and/or in series to meet the flow and treatment requirements.
Viola sempervirens, known by the common names redwood violet and evergreen violet, is a species in the genus Viola. It is native to the West Coast of the United States and British Columbia, Canada, and grows in closed-cone pine forest, California mixed evergreen forest, redwood forest, and Douglas fir forest communities. It has leathery purple ...