QUOTE(tengster @ Jun 5 2014, 08:02 AM)
I am reading something about rain water harvest in a website. Just feel like sharing some notes from the website.
ADVANTAGES OF RAINWATER
1. Rainwater harvesting systems allow us to achieve a sustainable future with better environment.
2. Non-potable (Non-consumption) water can be obtained through rainwater harvesting system and be use for laundry washing, watering plants, car washing, toilet flushing, etc. Substituting municipal water with rainwater for non-potable usage can decrease half the amount of the municipal water used.
3. Roof rainwater only requires little treat prior to non-potable usage. Rainwater is normally contaminated with bacteria and hence not suitable as drinking water.
4. Reduce the amount of your water bill with the use of rainwater harvesting system.
5. Rainwater harvesting is a good form of water supply during water rationing or interruption of water supply.
6. Reducing the chances of flash flood as rainwater harvesting system reduces the rain water
run-off and thus the system can be formed as a part of the rainwater management scheme.
7. Soft water is obtained through rainwater and is ideal for washing purposes while reducing the amount of detergent used.
8. Rainwater is ideal for plants watering and filling up ponds as it is chlorine free.
source -
http://www.rainwaterharvesting.com.my/why-...s-of-rainwater/THis will be great to be incorporated in the house. Just like today, early morning already raining cats and dogs....
boss, many disclaimer lah.
rainwater or whatever recycled water need to be treated.
the level of treatment determines the usability of the treated water.
the treatment also varies greatly, hence singapore has even succeeded in treating sanitary waste to drinkable water.
here lies the problem.
from my limited knowledge, rainwater harvesting tank is pretty basic. not much difference from having a pail to 'catch' rainfall.
this is the cheapest method but the water collected is pretty basic. you can only about do gardening watering with it. technically, not even safe for flushing or car washing.
if the water is not 'stored' properly, can lead to mosquito breeding ground.
and if the water is not used, it will be discharge when the next rainfall come, so eliminating the 'reduction of flash flood theory' (eg First in last out tank capacity).
the bigger danger lies in improper usage. if someone uses the stored water for usage that they are not suppose to, it might lead to illness.
in australia, their rainwater harvesting tank works because they put in some pretty hardcore filter. these filters does not come cheap locally (yet). and requires periodic maintenance and replacement. this is the biggest challenge as locals just loves to buy but are not programmed to be diligent in maintenance.
my 2 c boss.