Hi Mary, I agree with ...

Hi Mary,

I agree with ​Anacleto ​comment above, ​hence ​Constructed ​wetlands might ​be useful as ​alternative ​treatment ​techniques (low ​capital and ​operational ​costs and do ​not required ​qualified ​persons for ​operation and ​maintenance) ​

Refereeing to ​your suggestion,​ as mentioned ​in some ​comments above, ​clogging of the ​sand filter ​will be the ​main problem, ​and therefore ​will required ​periodically ​backwashing. To ​minimize the ​backwashing ​frequency, I ​might suggest ​to fill the ​column with ​gravel at the ​bottom, coarse ​sand in the ​middle and fine ​sand at the top,​ once the ​clogging is ​occurred, you ​need to replace ​only the above ​layer of the ​fine sand with, ​in this way you ​will reduce the ​frequency of ​backwashing ​

I will ​suggest first, ​that you need ​to determine ​the volume of ​the generated ​graywater from ​the households ​so may be one ​of our ​colleagues in ​this group can ​help you by the ​design of the ​system. ​

Finally, I ​would remind ​you that if ​discharge from ​kitchens will ​be also ​included in the ​system, the ​household ​keepers must be ​aware to remove ​solids, as ​possible as ​they can, ​before start ​with washing ​and don’t ​discharge oil ​or fat to the ​gray water ​collection ​system ​

Wish you good success

Regards

Zaid 

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