1、WastewaterWastewater環(huán)境1201 12034125朱丹丹12034124 劉澤陽(yáng)New words and phrasesNew words and phrasesYMunicipal wastewater YExcrete YSanitary sewageYDomestic sewageYInfiltrationYIllicitYConstituentYSewer YContaminant YDrain YMandatory CONTENTSMunicipal WastewaterIndustrial WastewaterStormwaterMunicipal Munic

2、ipal WastewaterWastewaterYDefinitionYSanitary sewage and domestic sewage including kitchen, bath, laundry, and floor drain wastes, together with the liquid wastes from commercial and industrial establishments, are termed municipal wastewater. Municipal WastewaterMunicipal WastewaterMunicipal wastewa

3、ter is usually conveyed in a combined sewer or sanitary sewer, and treated at a wastewater treatment plant.Picture 1 sewers Picture 2 wastewater treatment plantMunicipal Municipal WastewaterWastewaterMunicipal wastewater can come from:1.Water utilized in industrial product 2.Water used for cooling3.

4、Water required for activities such as lawn watering and street washingMunicipal WastewaterMunicipal WastewaterYThe quality of municipal wastewater varies with the proportion of residential, commercial, and industrial contributors and the nature of the industrial wastes which the system receives.Indu

5、strial Industrial WastewaterWastewaterIndustrial wastewater includes1.employees sanitary cess wastes from manufacturing 3.wash water4.relatively uncontaminated water from heating and cooling operationsIndustrial WastewaterIndustrial WastewaterYIn contrast with the relatively consistent ch

6、aracteristics of domestic sewage, they often have quite different characteristics .YIndustrial Wastewaters vary with the type of industry. They can range from strong biodegradable wastes like those from meat packing ,through wastes such as those from plating shops and textile mills, which may be inorganic . Industrial WastewaterIndustrial WastewaterYPretreatment may be mandatory before they can be accepted into the municipal system.YSo, extensive studies may be necessary to assess pretreatment requirements and the effect of the wastewater on biological processes.S