Dear Ron,
In the water treatment industries to clarify the water and flocculatind all te suspended solids it is normally used "Aluminum Sulfate" (liquid form about 8% content), can be used fram 10 to 25 grams per cubic meters.
It is not expensive and it work perfectly. It need a "pre-dilution" with water followed by a distribution and good mixture inside the  tank.
Regards
Gianfranco Roncolato
 

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To: oil_from_algae@yahoogroups.com
From: potrzebie44@...
Date: Tue, 30 Jun 2009 13:23:21 -0700
Subject: [oil_from_algae] Learning from Failure [1 Attachment]

[Attachment(s) from Ron Brown included below]

The attached photo shows an algae culture we grew from one slant of Chlorella vulgaris that we got from Carolina Biological Supply Company ($9.00 + $30.00 s&H) in one week.  I count that part as a success.  But we tried to flocculate it with lime, and that was a little disappointing. "Microalgae Harvesting and Processing: A Literature Review" discusses the use of lime to flocculate algae.  a quick search of the internet confirmed that lime has been used to control algae in ponds.  Well, it was quick, cheap and easy, but it didn't work.  We applied  a pound or two of  lime that was left over from a construction project to about 300 gallons of culture.  I was hoping to be able to scoop up the floc with  a household strainer.  Although there was a fine white precipitate on the bottom, there was no sign of flocculation.      ---rsb Ron Brown 30JUNE2009

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