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  2. Water treatment - Wikipedia

    en.wikipedia.org/wiki/Water_treatment

    Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking , industrial water supply, irrigation , river flow maintenance, water recreation or many other uses, including being safely returned to the environment.

  3. Zero liquid discharge - Wikipedia

    en.wikipedia.org/wiki/Zero_Liquid_Discharge

    Zero Liquid Discharge (ZLD) is a classification of water treatment processes intended to reduce wastewater efficiently and produce clean water that is suitable for reuse (e.g., irrigation). ZLD systems employ wastewater treatment technologies and desalination to purify and recycle virtually all wastewater received. [1] [2]

  4. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    From time to time, new vulnerabilities are discovered in various versions of Adobe Reader, [69] prompting the company to issue security fixes. Other PDF readers are also susceptible. One aggravating factor is that a PDF reader can be configured to start automatically if a web page has an embedded PDF file, providing a vector for attack.

  5. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    The choice of method will depend on the quality of the water being treated, the cost of the treatment process and the quality standards expected of the processed water. The processes below are the ones commonly used in water purification plants. Some or most may not be used depending on the scale of the plant and quality of the raw (source) water.

  6. Rotating biological contactor - Wikipedia

    en.wikipedia.org/wiki/Rotating_biological_contactor

    The RBC process allows the wastewater to come in contact with a biological film in order to remove pollutants in the wastewater before discharge of the treated wastewater to the environment, usually a body of water (river, lake or ocean). A rotating biological contactor is a type of secondary (biological) treatment process.

  7. List of PDF software - Wikipedia

    en.wikipedia.org/wiki/List_of_PDF_software

    As with Adobe Acrobat, Nitro PDF Pro's reader is free; but unlike Adobe's free reader, Nitro's free reader allows PDF creation (via a virtual printer driver, or by specifying a filename in the reader's interface, or by drag-'n-drop of a file to Nitro PDF Reader's Windows desktop icon); Ghostscript not needed. PagePlus: Proprietary: No

  8. Adobe Acrobat version history - Wikipedia

    en.wikipedia.org/wiki/Adobe_Acrobat_version_history

    Adobe Reader is now Adobe Acrobat DC. Version 15.0.0 was released on April 7, 2015, supporting iOS 8.0 and above. [46] The new features include: Easily accomplish frequent tasks from the new Tools menu; View recent files across computers and devices with Mobile Link; Use free Adobe Fill & Sign to fill, sign, and send forms on your iPad

  9. Waste stabilization pond - Wikipedia

    en.wikipedia.org/wiki/Waste_stabilization_pond

    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). Waste stabilization ponds involve natural treatment processes which take time because removal rates are slow.