西安建筑科技大学：《水资源利用与保护》教学课件_6 城市污水的水质特点及可处理性双语课件

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology 城市污水的水质特点 及可处理性

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology 城市污水的水质特点 及可处理性

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology Spectrum of impurities in water lonic Range Molecular Range Macromolecular I 0.001 0.01 0.1 1.0 100 Approximate Molecular Weight 1002001.00010.00020.000100.000500000 Viruse Bacteria Aaue。us salts Humic acids Cysts Sand Metal Clays Asbestos fibers

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology Spectrum of impurities in water Spectrum of impurities in water

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology Methods of Characterizing Wastewater Basic consideration for the characterization According to bulk parameters suspended matter, organic matter, nutrients, bacteria etc According to its state dissolved, colloidal, particulate, gaseous etc According to its treatability settleable, coagulable, biodegradable etc

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology 1 Classification of pollutants in domestic Wastewater

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology 1. Classification of Pollutants in Domestic Wastewater

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology General method to characterize dissolved and suspended matter Using a 0.45 um filter for separation 0.45m suspended There are some other criteria for the characterization, for example 1 nm dissolved Inm -l um colloidal >I ur suspended The 0.45 um criterion is widely applied

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology Evaluation parameters COD BOD Nitrogen NH-N NOx-N(NO3-N, NO2-N) Organic and inorganic nitrogen v KN=Organic nitrogen NH-N Y Inorganic nitrogen=TN-Organic nitrogen > TP

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology Evaluation Parameters Evaluation Parameters ¾ COD ¾ BOD ¾ Nitrogen Nitrogen • NH3-N • NOx-N (NO3-N, NO2-N) • Organic and inorganic nitrogen Organic and inorganic nitrogen 9 KN=Organic nitrogen + NH3-N 9 Inorganic nitrogen = TN – Organic nitrogen ¾ TP

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology BOD in domestic wastewate COD and BoD in 口 Dissolved口 Suspende domestic wastewater 2 Dissolved average 39.54% Suspended average: 60.46% COD in domestic wastewater 口 Dissolved口 Suspended More than 60% of COD or BOD in the domestic wastewater are suspended matter Less than 40%o of coD or BOD 3 in the domestic wastewater are Sample Number Dissolved average 34.12 dissolved matter Suspended average: 65.88%

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology COD and BOD in COD and BOD in domestic wastewater domestic wastewater • More than 60% of COD or BOD in the domestic wastewater are suspended matter. • Less than 40% of COD or BOD in the domestic wastewater are dissolved matter

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology Nitrogen in domestic Ammonia and nitrate wastewater Total Nitrogen 135791113151719212325 Sampling number Sampling Nu

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology Nitrogen in domestic Nitrogen in domestic wastewater wastewater

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology Nitrate and Nitrite 2.0 1.0 NO,-N 0.5 0.0 0369121518212427 ampling Nunmber r Organic and inorganic nitrogen 80 600 7 Inorganic average 68.5% Organic average: 31.5%

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology

Key Caboratory of Chinese Ministry of Education of northwest Water Resource and Environmental ecolog School of environmental and Municipal Engineering 声建墨群骨 xi'an University of Architecture and Technology Dissolved and suspended nitrogen (1) Dissolved and suspended nitrogen(2) 口 Dissolved口 Suspended Sampling Numbe Dissolved average 80.3% Suspended average Inorganic nitrogen takes about 70% of the total nitrogen among them most are ammonia nitrogen: About 80% of the tn are dissolved matter and only 20%are suspended matter; Dissolved matter takes about 88% of the inorganic nitrogen and about 60% of the organic nitrogen

Key Laboratory of Chinese Ministry of Education of Northwest Water Resource and Environmental Ecology School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology • Inorganic nitrogen takes about 70% of the total nitrogen, among them most are ammonia nitrogen; • About 80% of the TN are dissolved matter and only 20% are suspended matter; • Dissolved matter takes about 88% of the inorganic nitrogen and about 60% of the organic nitrogen