Important of Waste Water Treatment
Waste water is used water which includes human wastes, food wastes and chemicals.
In many developing countries the bulk of domestic and industrial waste water is discharged without any treatment or after primary treatment only.
To care our environment and thus by our health we should keep our water clean. Domestic water treatment removes physical, chemical and biological contaminants from waste water.
Treatment of waste water by a physical or chemical process involving settlement of suspended solids, or other process in which the BOD5 of the incoming waste water is reduced by at least 20% before discharge and the total suspended solids of the incoming waste water are reduced by at least 50%.
In secondary treatment waste water is purified by biological treatment.
Treatment of urban waste water by any process and/or disposal system which after discharge allows the receiving waters to meet the relevant quality objectives and the relevant provisions of this and other Community Directives is known as appropriate treatment.
Marine water bodies or areas where the discharge of waste water does not adversely affect the environment as a result of morphology, hydrology or specific hydraulic conditions which exist in that area. When identifying less sensitive areas, Member States shall take into account the risk that the discharged load may be transferred to adjacent areas where it can cause detrimental environmental effects. Member States shall recognise the presence of sensitive areas outside their national jurisdiction. The following elements shall be taken into consideration when identifying less sensitive areas:
Open bays, estuaries and other coastal waters with a good water exchange and not subject to eutrophication or oxygen depletion or which are considered unlikely to become eutrophic or to develop oxygen depletion due to the discharge of urban waste water.
In many developing countries the bulk of domestic and industrial waste water is discharged without any treatment or after primary treatment only.
To care our environment and thus by our health we should keep our water clean. Domestic water treatment removes physical, chemical and biological contaminants from waste water.
Treatment of waste water by a physical or chemical process involving settlement of suspended solids, or other process in which the BOD5 of the incoming waste water is reduced by at least 20% before discharge and the total suspended solids of the incoming waste water are reduced by at least 50%.
In secondary treatment waste water is purified by biological treatment.
Treatment of urban waste water by any process and/or disposal system which after discharge allows the receiving waters to meet the relevant quality objectives and the relevant provisions of this and other Community Directives is known as appropriate treatment.
Marine water bodies or areas where the discharge of waste water does not adversely affect the environment as a result of morphology, hydrology or specific hydraulic conditions which exist in that area. When identifying less sensitive areas, Member States shall take into account the risk that the discharged load may be transferred to adjacent areas where it can cause detrimental environmental effects. Member States shall recognise the presence of sensitive areas outside their national jurisdiction. The following elements shall be taken into consideration when identifying less sensitive areas:
Open bays, estuaries and other coastal waters with a good water exchange and not subject to eutrophication or oxygen depletion or which are considered unlikely to become eutrophic or to develop oxygen depletion due to the discharge of urban waste water.
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