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  2. Rotating biological contactor - Wikipedia

    en.wikipedia.org/wiki/Rotating_biological_contactor

    A rotating biological contactor is a type of secondary (biological) treatment process. It consists of a series of closely spaced, parallel discs mounted on a rotating shaft which is supported just above the surface of the wastewater. Microorganisms grow on the surface of the discs where biological degradation of the wastewater pollutants takes ...

  3. Wastewater treatment - Wikipedia

    en.wikipedia.org/wiki/Wastewater_treatment

    Wastewater treatment. Wastewater treatment is a process which removes and eliminates contaminants from wastewater. It thus converts it into an effluent that can be returned to the water cycle. Once back in the water cycle, the effluent creates an acceptable impact on the environment. It is also possible to reuse it.

  4. Activated sludge - Wikipedia

    en.wikipedia.org/wiki/Activated_sludge

    The white bubbles are due to the diffused air aeration system. The activated sludge process is a type of biological wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa. It is one of several biological wastewater treatment alternatives in secondary ...

  5. Secondary treatment - Wikipedia

    en.wikipedia.org/wiki/Secondary_treatment

    Secondary treatment. This small secondary clarifier at a rural sewage treatment plant is a typical phase separation mechanism to remove biological solids formed in a suspended growth or fixed-film bioreactor. Secondary treatment (mostly biological wastewater treatment) is the removal of biodegradable organic matter (in solution or suspension ...

  6. Industrial wastewater treatment - Wikipedia

    en.wikipedia.org/wiki/Industrial_wastewater...

    t. e. Industrial wastewater treatment describes the processes used for treating wastewater that is produced by industries as an undesirable by-product. After treatment, the treated industrial wastewater (or effluent) may be reused or released to a sanitary sewer or to a surface water in the environment. Some industrial facilities generate ...

  7. Upflow anaerobic sludge blanket digestion - Wikipedia

    en.wikipedia.org/wiki/Upflow_anaerobic_sludge...

    Upflow anaerobic sludge blanket ( UASB) technology, normally referred to as UASB reactor, is a form of anaerobic digester that is used for wastewater treatment . The UASB reactor is a methanogenic (methane-producing) digester that evolved from the anaerobic clarigester. A similar but variant technology to UASB is the expanded granular sludge ...

  8. Sequencing batch reactor - Wikipedia

    en.wikipedia.org/wiki/Sequencing_batch_reactor

    An SBR in the Philippines. Sequencing batch reactors ( SBR) or sequential batch reactors are a type of activated sludge process for the treatment of wastewater. SBRs treat wastewater such as sewage or output from anaerobic digesters or mechanical biological treatment facilities in batches. Oxygen is bubbled through the mixture of wastewater and ...

  9. Photocatalysis - Wikipedia

    en.wikipedia.org/wiki/Photocatalysis

    Photocatalysis. 2) disc, exciting electrons within the material. These then react with the water molecules, splitting it into its constituents of hydrogen and oxygen. In this experiment, chemicals dissolved in the water prevent the formation of oxygen, which would otherwise recombine with the hydrogen.