Full Description

The Georgia Department of Natural Resources Environmental Protection Division (EPD)has established limits for annual phosphorus load to several Georgia lakes. As a result,several wastewater treatment plants in metro Atlanta have received a 0.13-mg/L effluenttotal phosphorus (TP) limit. One alternative for meeting this limit is a membrane bioreactor(MBR) process with metal salt addition. Benefits of the MBR process includeessentially zero effluent total suspended solids (TSS), reduced footprint, reduced operationalcomplexity, and a high level of pathogen removal. In particular, the removal of allinsoluble phosphorus makes this process attractive when faced with a low effluent TPlimit.To meet its proposed TP limit, the City of Gainesville, Georgia selected an MBR processwith alum addition. A pilot study was conducted to confirm the ability of the process toachieve effluent goals, to verify full-scale design criteria, and to assess solids handlingstrategies. The results of the study confirm the ability of an MBR process with alumaddition to achieve the proposed effluent limits, including 0.13-mg/L TP. Includes 4 references, tables, figures.

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Edition: Vol. - No. Published: 03/05/2003 Number of Pages: 15File Size: 1 file , 430 KB