Treatment for irrigation water


I am an agriculturist and growing mainly cotton in my family farm. I use drip irrigation system for the irrigating the crop. We have a small farm pond, covered with polythene sheet to reduce the percolation of water. My problem is the constant growth of algae in water which creates problem in irrigation system. I am interested in exploring some new and cheap treatment methods for reducing this algae from the irrigation water so that drip doesn't have any problem. ( We have used barley straw to control the algae but it still there is formation of Algae in the pond. )



Said Al-Nammari
Dear Mazina,

I am not that expert or irrigation water, but first you reduce the amount of suspended solids in the water to avoid clogging of your drip irrigation systems. Then you to reduce dissolved solid in hard waters by decantation to avoid clogging your metal or plastic conveyor pipes. You need to well know the water quality of waters used in irrigation.

Maqbool Hussain
Covering the pond (to reduce sunlight contact) and re-circulation of the pond water should make your life easy.
Subrata Halder
Use Geomembrane or laterite clay soil instead of polythene sheet to prevent percolation through bottom of farm pond and to reduce growth of algae inside farm pond.

Iouri Vaisman
Floating reed beds can provide a good and cost effective solution as they will cover some of the surface area and prevent direct sunlight; however need to make sure that there is still sufficient free (non-covered) area for the atmospheric oxygen to access water in the pond. You can also harvest these reeds (need to select species that are usable). Similar project have been done in SE Asia and Northern and Western Australia with good results. Selection of the plants and area balance are two major keys to success here. Good Luck with your project! Regards, Iouri
Isao Takekoh
I would recommend any of following ideas except for chemical use.
lyseconcept jean Marius
c'est normal , pourquoi?

nothing replaces a natural Biological function of it and that it is your straw or another thing of the stones of the sand of fabric a filter has authority to thus retain to clog and thus to destroy any biological state
Doug Miell
Mazina KM

My suggestions are similar to many others. in the first instance consider using black sheeting to cover your pond to reduce the amount of sunlight on the water.

Secondly, install a pumping system that will recirculate the water. this need not be expensive, a small high volume, low pressure pump the could run for a few hours per day would work and with careful placement of the outflow there should not be too much disturbance to create sediment that would cause blockages to your irrigation tape.
Veronica Lack
Know by testing the Nitrogen content of your irrigation water (Nitrogen Spectrum tests) which include the Ammonia Nitrogen as test that will indicate the amount of Anhydrous Ammonia fertilizer runoff recaptured in your irrigation water. So don't add Chlorine, for the Biological Nitrogen runoff in the irrigation water to lessen the algae growth, as it reacts with the Anhydrous Ammonia, that creates a larger issue.
Cliff Treyens Treyens
I would consider having a well drilled to supply water for your irrigation. That takes care of the evaporation problem.
Alistair Marsh
Hi, I would recommend 2 options:-

1. a small paddle aerator, this will oxygenate the water and also disrupt the eplimnion. The algae require this warm upper layer to photosynthesize, and then drop to the bottom of the pond overnight to assimilate nutrients. Disrupting the layers disrupts this growth cycle.
2. ultrasound is also very effective. LG do one that runs on solar power so running costs are virtually nil.

Hope this helps
Mashood Ahmed
We also had the same problem once but not any more. We have 3 pools sizing 200 X 600 ft and 6 feet deep. Soil is highly porous. Some years back we did use poly ethylene sheets but they were always destroyed by the weeds growing through them. So we resorted to clay plaster and we found it doing the job. To our algal problem, we reared fish and its doing well and we do not need any eco friendly enzymes:)
Jeff Lynch
It appears that your algae is growing due to lack of oxygen in the water. A simple fix would be to install a pump hooked to a compressor in the bottom of your pond to get your water circulating. I had a similar situation with a shallow marine and installed a air line to a pump in our marina and it corrected the problem.
Nashiru Bawa
Algae will always form when waters remain stagnant. Try to increase activities in the pond to disturb the growth as fisrt step.
Small ponds have always an issue for Algae. The main reason for algal development is sunlight and stagnant water.

To avoid the growth there are enzymes available in the market for which the algae is nutrition. Further you need airation, have a floating fountain in you pond. this will help you avoid water becoming stagnant and there are much less chances of algal growth than.

Further more to both of the above, you can have a floating garden in your pond which behaves as a ecosystem and the algae will be its nutrient. This is a very effective technique but you need to be very specific in selecting the floating garden plants.

But to go for any of the above solution, your pond data as in quantity, quality of water, region, etc are very imp factors.

Pierre GRAAS
I agree with George Laszlo and believe that in fact we need two sets of data.
First the size parameters comprising the depth and second the chemical parameters, mainly pH, dissolved oxygen and redox.
If it were possible to know the kind of algea you have that would help.
Algae develop when they find nutriments to do so and when the chemical parameters build for them a nice environment.
It is often difficult to eradicate them but it can be done.
papiha thomas
many a time algae grows especially is small ponds as the water is stagnant .
Rommel Cruz
try using coptrol?
Muktar Muhammad
One way could be by harvesting the weed and produce compost manure from them. It might interest you to look up for compost manual.
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