同济大学：《给水工程原理与技术》课程电子教案（课件讲稿）Municipal Water Purification Plant

同©大学 Tongji University Municipal Water Purification Plant Pumping Storage tanks station Flocculant Raw water reservoir Mixing tank F月locculation tank Particulate filter Consumer Raw water held 2函 Water is mixed 28 As aggregates 3 Water Water is stored in reservoir to with flocculant of floc settle out, undergoes before use by allow particulates they carry colloidal filtration consumers to settle particles out of Water is disinfected suspension by chlorination, ozone treatment, or exposure to UV light Copyright 2001 Benjamin Cummings,an imprint of Addison Wesley Longman,Inc

Tongji University LESSON VII Disinfection Processes 20 Apr. 2017 Municipal Water Purification Plant

G 同燎大学 bactria Tongji University E.coli Escherichia coli ●Streptococcus

Tongji University bactria  E.coli Escherichia coli  Streptococcus

同©大学 Virus Tongji University ●H7N9 Influenza Virus SARS Virus

Tongji University  H7N9 Influenza Virus  SARS Virus Virus

酒 同燎大学 UV disinfection Tongji University

Tongji University UV disinfection

同©大学 Tongji University Question? Disinfection ●Sterilization

Tongji University  Disinfection  Sterilization Question?

同燎大学 Tongji University Disinfection refers to the partial destruction of disease-causing organisms. Sterilization is the destruction of all organisms

Tongji University  Disinfection refers to the partial destruction of disease-causing organisms.  Sterilization is the destruction of all organisms

月 同燎大学 Tongji University DISINFECTION THEORY

Tongji University DISINFECTION THEORY

同傍大学 Tongji University I.Characteristics of Ideal Disinfectant It is important that the disinfectant be safe to handle and apply,and that its strength or concentration in treated waters be measurable an issue with the use of ozone and UV disinfection where no residual is measured)

Tongji University Ⅰ. Characteristics of Ideal Disinfectant It is important that the disinfectant be safe to handle and apply, and that its strength or concentration in treated waters be measurable ( an issue with the use of ozone and UV disinfection where no residual is measured)

同©大学 Tongji University II.Disinfection Methods and Means Disinfection is most commonly accomplished by the use of (1)Chemical agents, (2)Physical agents, (3) Mechanical means, (④Radiation

Tongji University Ⅱ. Disinfection Methods and Means Disinfection is most commonly accomplished by the use of (1) Chemical agents, (2) Physical agents, (3) Mechanical means, (4) Radiation

同©大学 Tongji University Chemical Agents Chemical agents that have been used as disinfectants include: (1) Chlorine and its compounds, (2) Bromine, (3) Iodine, (4) Ozone, (⑤) Phenol and phenolic compounds, (6 Alcohols, (7) Heavy metals and related compounds, (8) Dyes, (9) Soaps and synthetic detergents quaternary ammonium compounds (10) Hydrogen peroxide (1 Peracetic acid (12) Various alkalies pH>11 (13) Various acids pH<3

Tongji University  Chemical Agents Chemical agents that have been used as disinfectants include: (1) Chlorine and its compounds, (2) Bromine, (3) Iodine, (4) Ozone, (5) Phenol and phenolic compounds, (6) Alcohols, (7) Heavy metals and related compounds, (8) Dyes, (9) Soaps and synthetic detergents quaternary ammonium compounds (10) Hydrogen peroxide (11) Peracetic acid (12) Various alkalies pH>11 (13) Various acids pH<3