Emerging and Innovative Technologies

Oral

395009 - Microbial Challenge Testing of Biosand Filters for Treatment of Waterborne Pathogens in Surface and Groundwater Supplies in Non-PRASA Communities in Puerto Rico

Monday, June 4
2:00 PM - 3:30 PM
Location: Lakeshore C
Co-Authors: Craig Patterson, Cincinnati, OH – USEPA; Graciela Ramirez, San German – Inter American University of Puerto Rico; Harvey Minnigh, San German – InterAmerican University of Puerto Rico; Cristina Maldonado, San Juan, Puerto Rico – USEPA

The Surface Water Treatment Rule (SWTR) requires all public surface-water systems (PSWs) to provide potable water with a minimum treatment consisting of filtration followed by chlorine disinfection. However, PSWSs in rural areas, have reported health-based violations of the SWTR. Non-compliance of health-based regulations is of great concern. Geographic, economic, and technical constraints create a critical problem for rural communities because without external resources it may be impossible for these communities to comply with federal drinking water regulations.
Puerto Rico has about 247 public water systems outside of Puerto Rico Aqueduct and Sewer Authority (PRASA) control. Many of these systems use source waters that are contaminated by human and animal wastes but only about half use chlorination and very few use filtration. Thus, there is a very clear need for a multi-barrier approach to provide safe water and improve the health of individuals living in communities served by the non-PRASA systems.
The objective of this research project is to find a solution to the problem of sustainable energy-efficient pretreatment and disinfection for those small rural communities with drinking water supplies in a tropical climate, so they can reduce their risks for waterborne disease and comply with the regulations. The idea is not to only benefit small rural Puerto Rican communities, but also to develop a concept or approach that can be implemented in other communities in tropical regions. A portable, bag-based, Biosand filtration systems was installed two years ago to remove turbidity as well as microorganisms from surface water sources. Subsequently, microbial challenge studies using Escherichia coli (E. coli) and Bacillus globigii (B. globigii) were performed on two of the filters with very satisfying results. This presentation focuses on the field-methodology of the tests and the analytical results.

Rajib Sinha, PE

Senior Engineer
Trihydro Corporation

Mr. Sinha is a Chemical Engineer and Project Manager with over 30 years of experience in Environmental Consulting and Engineering. Mr. Sinha has provided a wide array of services to industry for compliance with various laws. Mr. Sinha leads a team of engineers, geologists, scientists, and administrative staff that provides environmental compliance to commercial facilities and governmental clients. This includes projects conducted under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA); Resource Conservation and Recovery Act (RCRA); Superfund Amendments and Reauthorization Act (SARA); Bureau of Underground Storage Tank Regulations (BUSTR). Mr. Sinha has designed and implemented several systems for treating contaminated groundwater and industrial wastewater and assisted several clients in complying with provisions of the National Pollutant Discharge Elimination System (NPDES) under the Clean Water Act (CWA). He has coordinated his work activity with various disciplines and clients.

Mr. Sinha has served as the Project Leader for research projects at the U.S. Environmental Protection Agency (USEPA) Test & Evaluation (T&E) Facility in Cincinnati, OH for over 25 years. He directs research related to providing safe drinking water with a particular emphasis on systems serving small communities without access to public drinking water systems. Other current projects include development of innovative retrofit devices for stormwater management and watershed management research. Mr. Sinha also develops and manages third-party commercial projects at the T&E Facility.

Mr. Sinha holds a Bachelor of Technology in Chemical Engineering (Jadavpur University), Master of Science in Chemical Engineering (University of Southern California), and a Master of Business Administration (University of Cincinnati).

Presentation(s):

Send Email for Rajib Sinha


Assets

395009 - Microbial Challenge Testing of Biosand Filters for Treatment of Waterborne Pathogens in Surface and Groundwater Supplies in Non-PRASA Communities in Puerto Rico



Attendees who have favorited this

Please enter your access key

The asset you are trying to access is locked. Please enter your access key to unlock.

Send Email for Microbial Challenge Testing of Biosand Filters for Treatment of Waterborne Pathogens in Surface and Groundwater Supplies in Non-PRASA Communities in Puerto Rico