Metallic Ion Removal via Neutral Presipitation and Cross Flow MicroFiltration

Period of Performance: 03/15/1995 - 03/15/1996


Phase 2 SBIR

Recipient Firm

Environmental R & D, Inc.
2300 N. Yellowstone Hwy, Suite MFG-114
Idaho Falls, ID 83401
Principal Investigator

Research Topics


Coupling metallic ion removal via Neutral Precipitation chromium reduction, metal precipitation process to MicroFiltration Cross-Flow membrane solid/liquid separation resulted in heavy metal removal to well below discharge requirements. In addition, the need for the flocculents (polymers) which can contribute to as much as 60 percent of the chemical costs were eliminated. At the Tobyhanna Army6 Depot IWTP, the chemical costs can be reduced by 80 percent while the sludge generation can be decreased by 75 percent with the use of the Neutal Precipitation Cross-Flow MicroFilteration process. The feasibility of metallic ion removal via neutral Precipitatio Cross-Flow MicroFilteration has been demonstrated in the Phase I SBIR program. The objective of this Phase I SBIR is to design and construct a 10 gpm Neutral Precipitatio Cross-Flow Filteration system, demonstrate the operatio of the system at Tobyhanna Army Depot IWTP. Demonstration would include operation of the unit to determine the operating parameters, the membrane cleaning requirements, further development of the process control technologies, and deermination of the process economics. This proposal describes the tasks required to determine the design parameters, and the control parameters and the demonstratio of the process in a 10 gpm unit.