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  2. Photobioreactor - Wikipedia

    en.wikipedia.org/wiki/Photobioreactor

    A photobioreactor (PBR) refers to any cultivation system designed for growing photoautotrophic organisms using artificial light sources or solar light to facilitate photosynthesis. Photobioreactors are typically used to cultivate microalgae, cyanobacteria, and some mosses. [1] Photobioreactors can be open systems, such as raceway ponds, which ...

  3. Recirculating aquaculture system - Wikipedia

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

    Recirculating aquaculture system. Recirculating aquaculture systems ( RAS) are used in home aquaria and for fish production where water exchange is limited and the use of biofiltration is required to reduce ammonia toxicity. [1] Other types of filtration and environmental control are often also necessary to maintain clean water and provide a ...

  4. Ikejime - Wikipedia

    en.wikipedia.org/wiki/Ikejime

    Ikejime. Tekagi (手鉤), the tool that is used for performing ikejime. Ikejime (活け締め) or ikijime (活き締め) is a method of killing fish which maintains the quality of its meat. [1] The technique originated in Japan, but is now in widespread use. It involves the insertion of a spike quickly and directly into the hindbrain, usually ...

  5. Red garra - Wikipedia

    en.wikipedia.org/wiki/Red_garra

    The red garra ( Garra rufa ), also known as the doctor fish or nibble fish, is a species of cyprinid that is native to a wide range of freshwater habitats in subtropical parts of Western Asia. [4] This small fish typically is up to about 14 centimeters (5.5 inches) in total length, [4] but locally individuals can reach as much as 24 cm (9.5 in).

  6. Parshall flume - Wikipedia

    en.wikipedia.org/wiki/Parshall_flume

    A fixed hydraulic structure, the flume is used to measure volumetric flow rate in industrial discharges, municipal sewer lines, and influent/effluent flows in wastewater treatment plants. The Parshall flume accelerates flow through a contraction of both the parallel sidewalls and a drop in the floor at the flume throat.

  7. Fresh water - Wikipedia

    en.wikipedia.org/wiki/Fresh_water

    Fresh water is the water resource that is of the most and immediate use to humans. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of vascular plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive.