aeration rate

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• Aeration — is the process by which air is circulated through, mixed with or dissolved in a liquid or substance.Methods of aeration of liquidsAeration of liquids (usually water) is achieved by: * passing the liquid through air by means of fountains, cascades …   Wikipedia

• Membrane bioreactor — (MBR) is the combination of a membrane process like microfiltration or ultrafiltration with a suspended growth bioreactor, and is now widely used for municipal and industrial wastewater treatment with plant sizes up to 80,000 population… …   Wikipedia

• Sludge bulking — is defined as poor settling characteristics in sedimentation tanks. It is a problem that occurs in activated sludge process in wastewater treatment. The main cause of sludge bulking is the growth filamentous bacteria and algae. Filamentous… …   Wikipedia

• tilth — /tilth/, n. 1. the act or operation of tilling land; tillage. 2. the state of being tilled or under cultivation. 3. the physical condition of soil in relation to plant growth. 4. land that is tilled or cultivated. [bef. 1000; ME, OE. See TILL2,… …   Universalium

• 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

• 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

• Nannochloropsis and biofuels — Nannochloropsis viewed under a light microscope photobioreactor ( …   Wikipedia

• tree — treelike, adj. /tree/, n., v., treed, treeing. n. 1. a plant having a permanently woody main stem or trunk, ordinarily growing to a considerable height, and usually developing branches at some distance from the ground. 2. any of various shrubs,… …   Universalium

• Tree — /tree/, n. Sir Herbert Beerbohm /bear bohm/, (Herbert Beerbohm), 1853 1917, English actor and theater manager; brother of Max Beerbohm. * * * I Woody perennial plant. Most trees have a single self supporting trunk containing woody tissues, and in …   Universalium

• vegetable farming — Introduction       growing of vegetable crops, primarily for use as human food.       The term vegetable in its broadest sense refers to any kind of plant life or plant product; in the narrower sense, as used in this article, however, it refers… …   Universalium

• 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… …   Wikipedia