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Author      Title/Abstract      

Chemical Modeling to Solve Struvite Scaling Problems at the Sacramento Regional Wastewater Treatment Plant: A Progress Report
Author: Douglas Merrill and Perry Schafer
Date: 1/210

The precipitation of struvite is a recurring problem in anaerobic sludge digestion systems. Soluble magnesium, ammonia, and phosphorus (P) released during solids destruction combine to form a hard and tenacious solid that is extremely difficult to remove from equipment surfaces and pipelines. This paper discusses how chemical modeling is being used to help reduce struvite scaling problems in the sludge storage basins (SSBs) at the Sacramento Regional Wastewater Treatment Plant (SRWTP) in California. It also describes bench-, pilot- and full scale tests conducted to verify model calculations.