3 replies to this topic

[sinchitakapuria]

Hello everyone!

 

I have to do a hazard analysis on our water system and I am finding difficulty in doing so, especially from the IBC tote section. Attached is the flow chart for our water system. Any help or insight would be appreciated.

[sinchitakapuria]

Attached is the flow chart.

Attached Files

•  Water.PNG   177.63KB   0 downloads

[Kara S.]

Without seeing all the hook-ups and valves its a little difficult to conduct a hazard analysis based on only a flow diagram.

 

It looks like your water risk may be in the return lines. It goes from greenhouse to catch trough back to a return tank. Other than the cloth filter, do you have anything that would prevent microbial growth? You may have a chemical hazard as well. As an example... if you are cleaning the greenhouse lines and didnt shut-off the return system, you may have a chemical hazard risk that you wouldn't see until it already ruined your crop. You'll likely adjust pH and think nothing of it. Unsure how much that would effect the crop yield. 

 

As for your issue with the tote system... maybe you might add too much nitric acid but it wouldnt be a huge issue with the pH monitoring you have. There is also people dropping those hook-up hoses on the ground as bacterial hazard. 

 

Are all your the Line Tanks the same nutrient blend? Because that could be a quality risk if they are all different nutrients but using a shared greenhouse and catch system as shown. 

[Maria C]

Backflow prevention and air-gaps to drains are needed for protection as well.