Flexible tank for sludge storage: any experience with this type of installation?
asked 6 April 2017 asked by yannick 4363 (450 points)
Hello, Be careful to store only raw liquid sludge (not polymerized), or else the sludge will harden at the bottom of the tank. Also, plan ahead so you can adequately mix the sludge, particularly when it has to be removed from the tank. Best regards
Hi Thanks for your answer. Actually, the idea was to inject the polymer at tank inlet to achieve dryness of about 4%. We have no provision for mixing, apart from the fact that there will be 4 different outlets in order to alternate pumping of the sludge.
Hello, If you are talking about geotubes: Improper injection of polymer will result in a custard-like consistency, which is difficult to deal with when the time comes to collect the sludge for spreading purposes. This is caused by blockage of the pores, making removal of the water contained in the sludge impossible. You want to position the geotube in such a way as to allow for sludge removal using a mechanical shovel. In any case we tried it once and were not pleased with the result.
Ensure you have adequate vents and that they are in good working order. One of our storage tanks exploded because of the gases released during fermentation.
How do you check the operation of the vents?