 Effluents from industry and households contain harmful soapsuds and dirt particles. In addition, today water is too valuable to be left untreated or to affect othe water resources.
Therefore, much importance is attributed to a functioning sewer system, which takes the effluents to a purification plant, as well as to special instruments, which keep the supply mains in good condition. At the end of the disposal of waste water, there is the responsible handling of sewage sludge which can cause some problems.
|
