环境工程概论.pptx

1-1 Terminology
Table 1-1 monly used in the field of wastewater engineering
1-2 Impact of Regulations on Wastewater Engineering
1-3 Health and Environmental Concerns in Wastewater Management
Fig. 1-2 Covered treatment plant facilities for the control of odor emissions
1-4 Wastewater Characteristics
Tab 1-2 Levels of wastewater treatment
Tab 1-3 Unit Operations and Processes used to Remove Constituents Found in Wastewater
1-5 Wastewater Treatment
Fig 1-3 Facilities used for chemical treatment of odors from treatment facilities
Fig. 1-4 UV lamps used for the disinfection of wastewater
1-6 Wastewater Reclamation and Reuse
1-7 Biosolids and Residuals Management
Fig. 1-5 Egg-shaped digesters used for the anaerobic treatment of biosolids
2 Constituents in Wastewater
An understanding of the nature of wastewater is essential in the design and operation of wastewater collection, treatment, and reuse facilities, and in the engineering management of environmental quality.
(1) the constituents found in wastewater,
(2) sampling and analytical procedures,
(3) physical characteristics,
(4) anic nonmetallic constituents,
(5) metallic constituents,
(6) anic constituents,
(7) anic constituents pounds,and
(8) biological characteristics.
2-1 Wastewater Constituents
Constituents Found in Wastewater
Table 2-mon analyses used to assess the constituents found in wastewater

Many of the physical properties and chemical and biological characteristics are interrelated. For example, temperature, a physical property, affects both the amounts of gases dissolved in the wastewater and the biological activity in the wastewater…
Constituents of Concern in Wastewater Treatment
Tab 2-2 Principal constituents of concern in wastewater treatment
Suspended solids can lead to sludge deposition and anaerobic conditions;
posed of proteins; carbohydrates and fats ,and are measured monly in terms of BOD and COD;
Pathogens can municable diseases;
Priority pollutants include carcinogenicity, metog