I need advice about managing the PH of green liquor dregs PH. green liquor dregs is currently sitting above 12.5, at this point it is considered hazardous and above the spec of 11.5 for landfilling.
We are using a pre-coat filter and dregs centrifuge, the washing does not help with the PH reduction. I am considering dosing sulfamic acid into the slurry, but I am not certain how that will impact my liquor circuit.
Are there other alternatives I can consider for reducing the PH of the Dregs?
Have an idea here too:
http://www.tappi.org/content/events/08kros/manuscripts/2-1.pdf
Using alternative materials such as residual products from other industries to
mitigate the negative effects of acid rock drainage would simultaneously solve two environmental problems.Green liquor dregs mainly consist of insoluble species from wood and potential cause plugging of equipment and increase peroxide decomposition in respective application lead to pH increases .
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