I am looking into incinerating sludge processed with powdered activated carbon (PAC). Does anyone have any experience with this?
We are interested in the process because we have a treatment plant where primary sludge (settling tanks) and activated carbon sludge are kept separate.
We use Actiflo Carb (presence of microsand) and are looking at dryness with centrifuge of 25%. The project is already underway, but we haven't been able to get a sample yet.
The available incinerator for the WWTP would be a PyrofluidTM.
Any feedback would be great. Thanks.
I also manage a WWTP with Acticflo carb and Multiflo. For budgetary reasons, the PAC sludge is mixed with limed sludge and then spread, which is tolerated by our local water authority. It is a very economical process.
We started out with a two-track process because we are in an agricultural area and very sensitive to the use of pesticides. The water to be treated invariably contains pesticides, so, as a long-term environmental approach, we don't spread sludge containing these compounds, even if we assume leaching of pesticides with be virtually nil.
The word "tolerated" is well chosen, because it all depends on the context and local stakeholders.