Collected  water and treatment to re use for drip irrigation inside the Solar glass greenhouse

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We have a solar glass greenhouse project with 9 acres of roof water to be collected and stored in an open rain water harvesting pond.

We wish to use this collected  water and treat to re use for drip irrigation inside the Solar glass greenhouse.

Please suggest the size of rain water harvesting pond based on 9 acre roof and considering the rain fall data For the place "Haridwar" in Uttarakhand state in India and also in the place "Kanpur" in Uttarpradesh.

The treatment facility can be portable or fixed.

Can we use the PART OF large rain water harvesting pond as a FISH POND? If yes, please submit the proposal to : praveenkulkarni@kknesar.com

Are there proven technology with low cost machines to CONVERT AIR TO WATER. The solar power generated from the roof our solar glass GH can be used for running these AIR TO WATER MACHINES. Please submit the offer with energy needed to run these machines with capacity. Send the offer to: praveenkulkarni@kknesar.com

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6 Answers

  1. Rainwater harvested from the roof can be directly applied thru drip. Only if the roof has dirt it will cause problem for the water. Use a smart filter in the drip system. 

    The quantity of water collected depends on the surface area of the roof and the rainfall amount. 1mm rain on a surface of 1000 m2 will give 1000 liter of water. You can estimate yourself. The storage structure also is accordingly calculated. 1 cubic meter volume pit   1 m long x 1 m wide x 1 m depth can store 1000 liter.

    Answered on by

  2. Most ideally use bio soaps and detergents so that waste water can be phyto remedied and re use water for flush- toilets and kitchen garden and glass house irrigation.

    Water demand to be minimal at campus.

    Well wishes.

    Ajit Seshadri .. 

     

  4. '@' 

    Area 9 acres i.e. 9 x 4047=36423 sq.m. Avg rainfall at Haridwar is 2100 mm / year. So the quantity harvested  by you will be 36423 x 2.1= 76488 cu.m. i.e. 7 cr. 65 lakhs litres. A film lined farm pond type structure will cost nearly Rs. 0.15 (15 paise) per litre. It will be better to construct 4 ponds of 2 cr. ltrs each. The ponds will take approx. 10 acres area, depending on the depth you can dig to.

    For the fish, you have to feed them, the feed added to the ponds make the water unfit for filters in drip system. I think one or two of the ponds can be used as fish pond as per your need. 

    We can further discuss the matter on mail. I'll give you a test mail from my  mail id.

  5. Hi

    i would suggest using rainwater tanks for the following reasons:

    • Run off contamination from roofs and non point source run off.
    • There could also be a fair amount of treatment from fish wastes if heavily populated.
    • Evaporation
    • Security of the water from contamination of unexpected events

    Solutions:

    If you design a system using the first flush technology collecting from only from the roof water should be of potable quality only needing filtration by UV and charcoal to insure quality. See attachment.

    As for evaporation up to 73% of water can be lost through evaporation in a year. A study found with Lake Lanier near Atlanta, Ga USA. Rainwater tanks lose very little water from evaporation.  US Department of Commerce Technical Paper NO. 37, M. A. Kohler, T. J. Nordenson and D. R. Baker Hydrological Service Division, 1959

    Water run of from surrounding areas could also effect quality and accidents can happen.

    If interested in pursuing a more traditional form of rainwater harvesting let me know. Not sure of the cost comparison, but maintenance  would be very simple and less costly.