SODIS technology

Benefits

1.       It removes harmful pathogens which is the main problem with drinking water in most developing societies

2.       It is a low or zero cost technology as used bottle in usually available for free

3.       The technology uses clean solar energy

4.       It is so simple and easy technology, every where everyone can do it at home

5.       Treated water by this technology can be used for up to one week if it is stored properly

6.       As this technology recycles waste plastic bottles it contributes towards sustainable waste management.

Limitations / challenges of SODIS technology

1.       It is not very effective on rainy days

2.       PET bottles may not be available everywhere particularly in remote rural areas

3.       This technology requires relatively clear water with turbidity less than 30 NTU

4.       As it has to be done is relatively small bottles, it in not sufficient useful to treat large volume of water

5.       This technology does not remove chemical contaminate in water such as iron or arsenic.