Total parameters biochemical oxygen demand

In high levels these parameters may be inhibitory to biological systems m = thousands BOD, biochemical oxygen demand COD, chemical oxygen demand TSS, total suspended solids. 

Biochemical oxygen demand (BOD) is arguably the oldest total parameter used for the characterization of water quality. It was introduced in the first decade of the twentieth century as a test for the organic pollution of rivers. BOD is the amount of oxygen in mg L 1 required for the oxidation of the organic matter contained in water by biological action under standardized test conditions (usually a temperature of 20°C and an incubation time of 5 days).8 9 The test is often used to evaluate the efficiency of wastewater treatment processes. 

Parameters such as biochemical oxygen demand (e.g. BOD5) and chemical oxygen demand (COD) cannot simply be converted into a figure for the total content of organic matter. For this reason, additional overall parameters have been introduced to establish the total content of organically bound... 

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