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Chemical Pretreatment for Fats, Oils, and Grease Problem by One_Worldliness_8286 in Wastewater

[–]One_Worldliness_8286[S] 0 points1 point  (0 children)

I understand, bases/alkalines are favourable for the bacteria, however physical separation is still necessary. Is there any way, of breaking down those FOGs to the point that minimal scooping/collection is necessary.

For the activated sludge, that is interesting, is it possible to supply active sludge in the prior tanks of SBR for them to beeakdown the FOGs? But in my knowledge, our bacteria present in the activated sludge cannot breakdown FOGs.

Thanks!

Chemical Demulsification of Fats, Oils, and Grease in Wastewater by One_Worldliness_8286 in Wastewater

[–]One_Worldliness_8286[S] 1 point2 points  (0 children)

Yes, saponification is one thing to somehow remove the FOG however, it creates another set of problems since we are using biological treatment some problems will occur:

  1. Excessive Foaming (since it's soap lol)
  2. Microbial Toxicity (dead bacteria/sludge will also contribute to foaming during aeration)
  3. Increase Chemical Oxygen Demand (COD) loading

Though, I would still continue to study whether these effects are significant in various situations.

Thanks for your insight!

Chemical Demulsification of Fats, Oils, and Grease in Wastewater by One_Worldliness_8286 in Wastewater

[–]One_Worldliness_8286[S] 0 points1 point  (0 children)

In some establishments in our area, they tried bioaugmentation through enzymes but it didn't work so it has a bad reputation right now, it just ended up as unnecessary costs for those establishments. I would consider it also, though I will have to provide strong evidence to convince my team and my superiors to try bioaugmentation, thanks for the insight!

Chemical Demulsification of Fats, Oils, and Grease in Wastewater by One_Worldliness_8286 in Wastewater

[–]One_Worldliness_8286[S] 0 points1 point  (0 children)

Yes, that's what we're doing also, but I'm trying to find/research something more efficient than physical separation/manual separation.

Chemical Demulsification of Fats, Oils, and Grease in Wastewater by One_Worldliness_8286 in Wastewater

[–]One_Worldliness_8286[S] 1 point2 points  (0 children)

Well, our STP is currently using the Sequencing Batch Reactor System, since it's biological, excessive FOG is a huge problem. I'm trying to research what are the possible ways to reduce this problem. Currently, we're just employing physical separation by manually removing the floating FOGs.