Burnsville High students considers getting a patent for water filter

  • Article by: ERIN ADLER , Star Tribune
  • Updated: June 22, 2013 - 2:00 PM

Burnsville High School student Suraj Shah created a portable, cheap water filter for a class project last fall and now is considering patenting it.


By Erin Adler Burnsville High School student Suraj Shah invented an inexpensive water filter for a class project last fall. He's since taken it to an international science fair and is looking into patenting it.

As a swimmer, Burnsville High School student Suraj Shah has always loved water. But he had never thought about the global shortage of drinkable water until last fall, when he began considering possible science fair projects for biology class.

He decided to create a portable water filter. Since then, his idea has taken him to an international science fair and into meetings with a patent attorney, where he’s discussing patenting it.

“I’ve always wanted to do something that benefits the community and the environment,” said Shah, who will be a junior.

Shah decided last fall that he wanted to create a portable water filter so that people in places like in sub-Saharan Africa and Haiti, as well as those affected by natural disasters, could purify water themselves using an inexpensive hand-held device.

His device uses a syringe-like design to pump water through pieces of PVC pipe and through a 3M filter.

Early in the process, Shah went to see Sue Borne, his former middle school teacher in Metcalf Junior High’s STEM Magnet program. While there, he had a brainstorm after spotting a syringe in her classroom.

“I knew I needed to create pressure,” he said. If the device was to be portable and cheap, it couldn’t use a generator for electricity.

He thought that if he could “make a large-scale syringe, that would be pretty simple and effective as well,” he said.

“A lot of inventions require a bit of luck,” he added.

He consulted with an engineer at 3M, who told him about different ways to filter water. Then he made a trip to Home Depot with his parents and began creating a prototype, emphasizing affordability.

His design costs about $20 to make using materials purchased at retail prices, but could be as inexpensive as $10 to manufacture on a larger scale, he estimates.

Using pond water from his backyard, he completed nitrate and phosphate testing on water that had gone through the filter. The water had “close to zero” parts per million of the two minerals, he said.

He said that “anyone from age 5 to 80 could use this. You don’t have to use extraneous force.”

Last month, Shah took his idea, along with the paper he wrote for class, to the International Sustainable World (Engineering, Energy & Environment) Project Olympiad (I-SWEEEP) in Houston, Texas. He won an Honorable Mention in the engineering category.

Since then, he’s thought about making small improvements to the design and trying it out using dirtier water sources.

Along with his parents, he recently met with a patent attorney to discuss whether the idea is patentable.

Shah said that he hopes to be a biomedical or chemical engineer one day, an interest that developed after spending three years in Borne’s STEM classes, which focus on engineering.

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  • Suraj Shah, who will be a junior at Burnsville High School, invented a portable water filtration device that works like a syringe to help meet the global need for clean water.

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