activated-sludge method

  • 1 activated-sludge method — ▪ sewage treatment       sewage treatment (sewage system) process in which sludge, the accumulated, bacteria rich deposits of settling tanks and basins, is seeded into incoming waste water and the mixture agitated for several hours in the… …

    Universalium

  • 2 method — The mode or manner or orderly sequence of events of a process or procedure. SEE ALSO: fixative, operation, procedure, stain, technique. [G. methodos; fr. meta, after, + hodos, way] Abell Kendall m. a …

    Medical dictionary

  • 3 sludge — A muddy sediment. SEE ALSO: sludged blood. activated s. activated s. method. * * * salivation, lacrimation, urination, defecation, gastrointestinal upset, emesis * * * sludge sləj n a semisolid precipitated mass or deposit <biliary sludge>… …

    Medical dictionary

  • 4 environmental works — ▪ civil engineering Introduction       infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …

    Universalium

  • 5 agricultural technology — Introduction       application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation       Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …

    Universalium

  • 6 sedimentation tank — ▪ sewage treatment also called  Settling Tank,         component of a modern sewage treatment system. In a large metropolitan system, waste water is passed through a series of tanks following coarse screening to remove large objects. Grit… …

    Universalium

  • 7 Water purification — This article is about large scale, municipal water purification. For portable/emergency water purification, see portable water purification. For industrial water purification, see deionized water. For distilled water, see distilled water. Water… …

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  • 8 Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …

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  • 9 Living machines — are a form of biological wastewater treatment designed to mimic the cleansing functions of wetlands. They are intensive bioremediation systems that can also produce beneficial by products such as methane gas, edible and ornamental plants, and… …

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  • 10 Trickling filter — A trickling filter consists of a fixed bed of rocks, gravel, slag, polyurethane foam, sphagnum peat moss, or plastic media over which sewage or other wastewater flows downward and causes a layer or film of microbial slime to grow, covering the… …

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  • 11 Hydropolitics in the Nile Basin — Essay like|article|date=December 2007The Nile River is subject to political interactions. It is the world s longest river flowing 6,700 kilometers through ten countries in northeastern Africa – Rwanda, Burundi, Democratic Republic of the Congo… …

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  • 12 Stabilization pond — technology sometimes also called facultative pond technology is a natural method for wastewater treatment. TechnologyStabilization ponds consist of shallow man made basins comprising a single or several series of anaerobic, facultative or… …

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  • 13 Combined oral contraceptive pill — (COCP) Background Birth control type Hormonal First use ? …

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  • 14 Simultaneous nitrification-denitrification — (SNdN) is a wastewater treatment process. Microbial simultaneous nitrification denitrification is the conversion of the ammonium ion to nitrogen gas in a single bioreactor. The process is dependent on floc characteristics, reaction kinetics, mass …

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  • 15 Biochemical oxygen demand — or Biological Oxygen Demand (BOD) is a chemical procedure for determining how fast biological organisms use up oxygen in a body of water. It is used in water quality management and assessment, ecology and environmental science. BOD is not an… …

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  • 16 Sedimentation (water treatment) — Sedimentation is a physical water treatment process used to settle out suspended solids in water under the influence of gravity.[1] Contents 1 Basics 2 Applications 2.1 Potable Water Treatment …

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  • 17 Ultrasound — Not to be confused with Supersonic .Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy,… …

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  • 18 Robust statistics — provides an alternative approach to classical statistical methods. The motivation is to produce estimators that are not unduly affected by small departures from model assumptions. Contents 1 Introduction 2 Examples of robust and non robust… …

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  • 19 SAS — or SAS may refer to: Military * Special Air Service, the principal special forces unit of the British Army * Australian Special Air Service Regiment, Australian regiment derived from the British Army regiment * New Zealand Special Air Service (NZ …

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  • 20 Mitigation of peak oil — The standard Hubbert curve, plotting crude oil production of an oil well or oil field over time …

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