AlternativeLEC5.pdf

Alternative Water Treatment (5)

(5)

Alternative disinfectants

disinfectants (3)

(3)

Lecture 4

4 Î Reminder

Reminder

Disinfection of

of water

water by

by using

using Solar

Solar Irradiation

Irradiation

SODIS Î sum

sum- up

Problems in

in application

application

Examples

Î Semester

Semester essay

essay Î subjects

subjects and

and principles

principles

Alternative Water Treatment

Alternative

Î Lecture

Î Disinfection

¡ SODIS

¡ Problems

¡ Examples

disinfection

Purposes

Purposes of

of investigations

investigations

countries

Î Implementation

Implementation of

of non

non- chemical

chemical means

means (no

(no by

by- products

products

recognized );

);

/trekking;

¡ Developing

Developing countries

countries and

and remote

remote areas

areas:

No chemicals

chemicals needed

needed;

Î Lack

of toxicity

toxicity and

and/ or

or explosion

explosion

No electricity

electricity consumption

consumption;

Relatively simple

simple ,

, sustainable

sustainable solution

solution;

Î Applicable

in crisis

crisis situations

situations

Solar disinfection

Solar

Developed countries

¡ Developed

recognized

Î Tourism

Tourism /trekking;

Î No

Lack of

Î No

Î Relatively

Applicable in

Solar disinfection

disinfection

Pre- requisites

requisites

CLARIFICATION Î either

either by

by rapid

rapid filtration

filtration or

or by

by coagulation

coagulation ( please

please

note this

this point

point during

during lecture

lecture 5);

5);

AERATION ( Oxygenation

Oxygenation )

) Î by

by occasional

occasional mixing

mixing before

before and

and during

during

treatment ( e.g

e.g .

. Turbulent

Turbulent flow

flow)

ILLUMINATION Î as

as long

long as

as possible

possible

¡ It

is NOT

NOT disinfection

disinfection with

with the

the use

use of

of solar

solar cells

cells to

to produce

produce electrical

electrical

energy

Solar

Pre

¡ CLARIFICATION

note

¡ AERATION (

treatment

¡ ILLUMINATION

It is

disinfection

General

General principles

principles

Solar disinfection

Solar

disinfection

SODIS system

SODIS system Î general

general issues

issues

Elaborated in Swiss institute EAWAG, recommended for remote

under developed countries;

¡ May be applied by tourists

May be applied by tourists

¡ Simple

Simple technology

technology useful

useful for

for treatment

treatment of

of small

small quantities

quantities of

of water

water

Applies two

two ( synergic

synergic )

) mechnisms

mechnisms:

Î Radiation

in the

the spectrum

spectrum of

of UV

UV-A ( Wavelength

Wavelength 320

320- 400

400 nm

nm );

);

Increased water

water temperature

temperature

Solar disinfection

Solar

¡ Elaborated in Swiss institute EAWAG, recommended for remote

¡ Applies

Radiation in

Î Increased

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: