biochemical oxygen demand-5 day test

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• 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… …   Wikipedia

• Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …   Wikipedia

• Wastewater quality indicators — such as the biochemical oxygen demand (BOD) and the chemical oxygen demand (COD) are essentially laboratory tests to determine whether or not a specific wastewater will have a significant adverse effect upon fish or upon aquatic plant… …   Wikipedia

• Wastewater — For the lake in Northwestern England, see Wastwater. Public infrastructure …   Wikipedia

• 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

• Hydrogen peroxide — IUPAC name …   Wikipedia

• Freshwater environmental quality parameters — are the natural and man made chemical, biological and microbiological characteristics of rivers, lakes and ground waters, the ways they are measured and the ways that they change. The values or concentrations attributed to such parameters can be… …   Wikipedia

• List of environmental topics (B) — This is a list of environmental topics. They relate to the effect of human activity on the environment.*B Reactor ( plutonium production reactor ) (in Washington state in the US) *Bachelor of Environmental Studies *Baku Tbilisi Ceyhan pipeline… …   Wikipedia

• Water quality — A rosette sampler is used to collect samples in deep water, such as the Great Lakes or oceans, for water quality testing. Water quality is the physical, chemical and biological characteristics of water.[1] It is a measure of the condition of… …   Wikipedia

• Water pollution — Raw sewage and industrial waste flows across international borders New River passes from Mexicali to Calexico, California. Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans and groundwater). Water p …   Wikipedia

• Mississippi River — a major river of North America that flows from the US state of Minnesota to the Gulf of Mexico. It was called the ‘Father of Waters’ by Native Americans. It is 2 348 miles/3 778 kilometres long and passes the cities of Minneapolis, St Louis,… …   Universalium