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questions about handling studio waste--settling solids

updated thu 22 jan 04


Dave Finkelnburg on wed 21 jan 04

Paulette Carr asked about settling the solids in her wash bucket. She was
using salt as a settling aid for clay and glaze wash water. She deserves a
pat on the back for testing something else and then reporting the result of
her test. Good job, Paulette! I sent her the note at the bottom below,
and she wrote back as follows.
Dave Finkelnburg

> Thank you so much for answering my query! I tried your suggestion
yesterday: I
>added a tablespoon of vinegar to the bucket of low-fire clay waste, and
>-- within a couple hours the water above was clear and free of suspended
>materials. I will glaze later this week, and can hardly wait to try
>(flocculant- NOW I understand) with the glaze-waste water. I appreciate
>warning about over-flocculating, and will add it cautiously and slowly to
>glaze-waste water to see if I can get the solids to sediment....

----- Original Message -----
From: "Dave Finkelnburg"
> Paulette,
> First, good for you for having a zero discharge studio!
> Second, you may test a flocculant to help settle the solids in the
> or clay wash water buckets faster. The salt is a deflocculant. Epsom
> or vinegar, might be better, but you need to test
> this. Keep in mind you can overdose flocculants. If you do, you create
> loose, clumpy flocs that tend to never settle very hard. That leaves you
> extra water to evaporate.