Module 1.0Module 1.0IntroductionIntroduction

Obj 1.3: What is environmental technology? The application of technology and

engineering principles to the – planning, – design, – construction, – and operation

of the following systems...

Obj 1.3: Systems?

Drinking water treatment & supply Sewage treatment & disposal Stormwater drainage & control Solid & hazardous waste

management Air & noise pollution control General community sanitation

Obj 1.4: Fundamental Objectives of E.T.? Public Health Protection

– to help prevent the transmission of disease among humans

Environmental Health Protection– to preserve the quality of water, land,

air, vegetation, and wildlife

Obj 1.5: Technical Specialties within E.T.?

hydraulics hydrology

municipal services biology

chemistry ecology

geology...

Obj 1.6: Pathogens?

there are many microscopic there are many microscopic organisms in the environment: organisms in the environment: bacteria; protozoa; viruses.bacteria; protozoa; viruses.

those that are capable of those that are capable of transmitting diseases are called transmitting diseases are called pathogenic organisms (i.e. E.coli, pathogenic organisms (i.e. E.coli, cryptosporidia)cryptosporidia)

or... pathogensor... pathogens

Obj 1.7: Modes of Disease Transmission...

pathogens humans

DIRECT TRANSMISSIONDIRECT TRANSMISSION

physical contactsneezingdroplet spray

INDIRECT TRANSMISSIONINDIRECT TRANSMISSION

air-borne: dust, aerosolvehicle-borne: water, food

vector-borne: insects, animals

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