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  2. Recirculating aquaculture system - Wikipedia

    en.wikipedia.org/wiki/Recirculating_aquaculture...

    A series of treatment processes is utilized to maintain water quality in intensive fish farming operations. These steps are often done in order or sometimes in tandem. After leaving the vessel holding fish the water is first treated for solids before entering a biofilter to convert ammonia, next degassing and oxygenation occur, often followed ...

  3. Biofilter - Wikipedia

    en.wikipedia.org/wiki/Biofilter

    These biological treatment systems effectively reduce water-borne diseases, dissolved organic carbon, turbidity and color in surface water, thus improving overall water quality. Biotechnological techniques can be used to improve the biofiltration of drinking water by studying the microbial communities in the water.

  4. Drinking water quality in the United States - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality_in...

    Drinking water quality in the United States is generally safe. In 2016, over 90 percent of the nation's community water systems were in compliance with all published U.S. Environmental Protection Agency (US EPA) standards. [1] Over 286 million Americans get their tap water from a community water system.

  5. Of fish and men: Trump's California water order takes aim at ...

    www.aol.com/news/fish-men-trumps-california...

    Since the Delta smelt, a food source for larger fish including salmon and sea bass as well as sea lions is near extinction, the government has been pumping less water out to save the fish for ...

  6. Organic aquaculture - Wikipedia

    en.wikipedia.org/wiki/Organic_aquaculture

    Organic aquaculture is a holistic method for farming fish and other marine species in line with organic principles. [1] The ideals of this practice established sustainable marine environments with consideration for naturally occurring ecosystems, use of pesticides, and the treatment of aquatic life. [2]

  7. Organisms involved in water purification - Wikipedia

    en.wikipedia.org/wiki/Organisms_involved_in...

    Fish and waterfowl feces return waste to the water, and their feeding habits may increase turbidity. Cyanobacteria have the disadvantageous ability to add nutrients from the air to the water being purified and to generate toxins in some cases. The choice of organism depends on the local climate different species and other factors. Indigenous ...