Page 5 - 1_Environmental analysis

Sum parameter Total Organic Carbon

TOC – Determination in wastewater

SCA-130-102

Wastewater is water that has been Sewage also includes the liquids that are
contaminated by use. In terms of its discharged and collected from waste
composition, wastewater is not homogeneous treatment and storage plants”.
but as diverse as its possible sources.
This diversity of wastewaters should also be
taken into account during the analysis.
Wastewater can thus contain small amounts
of organic pollutants with little matrix, as well
as highly saline products with high amounts
of organic components.

■ Example of wastewater measurement
Below, a strongly saline wastewater from the
chemical industry was analyzed. In addition
to various substances present in low
amounts, the wastewater mainly contained
high amounts of phenolic substances
originating from production processes.
According to the German Water Resources
Act (Wasserhaushaltsgesetz, WHG)
wastewater is defined as follows:

“Wastewater is

1) water whose properties have been
changed by domestic, commercial,
agricultural or other use and the water
(sewage) discharged with it during dry
weather conditions as well as

2) the run-off and collected water (rainwater)
from built-up or paved areas following
precipitation. Fig. Result of the wastewater