Brown and Caldwell Home Page
Technical Papers RECENT PAPERS    ALL PAPERS      LOG IN

Brown and Caldwell engineers and scientists are technical and thought leaders in the environmental sector. Meet the people who have been advancing innovation for more than 70 years.
Author      Title/Abstract      

Algae Harvesting with a Fine-Weave Belt Filter
Author: Joseph C. Dodd, Anthony Goh

The removal of algae from lagoon effluents has been extensively researched over the past decade for upgrading existing lagoons to meet suspended solids limitations for discharge. Recently, improved microstrainers, using 1 um polyester fabric, have been shown capable of removing typical oxidation pond or lagoon algae. In this case, a filtered effluent is produced, but no attempt is made to recover the algal solids. The algal solids are recycled to the pond at a solids concentration of only about five to ten times that of the pond effluent, since the concentrating factor is limited by the carryover characteristics of the microstrainer and the backwash water is used to remove the solids from the filter fabric.