The first in-person disrupt in three years is in the book. We end it with the winner of the startup battlefield.

The startup competition at the Startup Battlefield started with 20. The companies pitched for a chance to win $100,000 and the coveted Battlefield Cup during the first two days of the event.

The judges' notes were pored over by the editors and they narrowed the list to five finalist companies.

The final panel of judges included Mar Hershenson (Pear VC), Yahoo CEO Jim Lanzone, Aileen Lee, and Matthew Panzarino. A startup won. There is no further work to be done!

Winner: Minerva Lithium

A coordinated framework that looks like black gravel and is able to extract critical materials from brine in just three days has been created by MINERVA LITHIUM. It can do it in three days using just 30,000 gallons of water. It takes half a million gallons of water to get the same amount of brine. The surface area of one gram of this absorbent material is equal to that of a soccer pitch, which gives you an idea of how little you would need to extract a lot of minerals. Here, you can read our coverage on the subject.

Runner-Up: Intropic Materials

They stay around for a long time, even though they are great for a lot of things. Intropic came up with a set of enzymes that can be added to plastic at the beginning of their life cycle, before it becomes products. The company is trying to upend how plastic is made and how it's discarded. Many of the most commonly used plastics are not harmful to the environment. In the normal course of plastic production, the pellet or powders are added with the help of the enzymes. The manufacturing processes used to make plastic products are unaffected. The products can be composted at the end of their lives. You can read our coverage here.