The brother-sister team at Houston-based Cemvita Factory is celebrating its series A initial closing. Photo courtesy of Cemvita

A promising Houston startup using biotechnology to reduce carbon emissions is celebrating the initial closing of its series A fundraising round.

Cemvita Factory announced the news of its round closing, but didn't disclose the amount raised. 8090 Partners, a new investment group of entrepreneurs turned investors, led the round. Existing investor Oxy Low Carbon Ventures also contributed, along with Seldor Capital, Climate Capital, and others.

Founded by brother-sister team Moji and Tara Karimi in 2017, the company's technology biomimics photosynthesis to take carbon dioxide and turn it into something else. Cemvita uses this synthetic biology to decarbonize heavy industry across chemical manufacturing, mining, and oil and gas.

"Decarbonizing heavy industry is one of the most critical challenges in addressing climate change," says Moji Karimi, who serves as CEO, in a news release. "Synthetic biology is now primed to revolutionize heavy industries because of its inherent low-carbon advantages, and Cemvita is taking the lead in identifying and derisking the key applications."

Cemvita is currently working. with a number of clients — including Oxy, which announced its pilot in April — to reduce their carbon footprints.

"We believe the adoption rate and market size growth of our target applications will only accelerate due to the urgency for a low-carbon energy transition," Karimi continues. "The future of manufacturing will be low-carbon biomanufacturing and the future of mining will be sustainable biomining."

According to the release, the fresh funds will go toward launching Cemvita's bio-hydrogen solution, as well as to support construction and operation of a bio-ethylene pilot plant with Oxy. The pilot project, which reported success in the lab, is expected to scale.

"While synthetic biology has proven to be effective in re-imagining food and proteins, we've long held a firm belief in synthetic biology's promise in the heavy industrial space, but have waited until we've seen the right technology and team to drive real innovation in the sector," says Rayyan Islam, partner at 8090 Partners, in the release. "Cemvita's technology is a fundamental game-changer that provides a real economic solution and major players across heavy industry have taken serious notice."

It's not just investors and industrial players who have taken notice. Cemvita won the recent GS Beyond Energy Innovation Challenge from Cleantech.org. The company was also selected as a cohort member at Carbon2Value Initiative.

"Cemvita's technology is truly revolutionary in its use of CO2 and as a resource to provide viable economic solutions as more and more companies seek ways to reduce their carbon footprint. We remain impressed and excited about Cemvita's technology's positive impact on Earth and beyond," says Sidney N. Nakahodo, founder and general partner of Seldor Capital, in the release.

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2 Houston space tech cos. celebrate major tech milestones

big wins

Two Houston aerospace companies — Intuitive Machines and Venus Aerospace — have reached testing milestones for equipment they’re developing.

Intuitive Machines recently completed the first round of “human in the loop” testing for its Moon RACER (Reusable Autonomous Crewed Exploration Rover) lunar terrain vehicle. The company conducted the test at NASA’s Johnson Space Center.

RACER is one of three lunar terrain vehicles being considered by NASA for the space agency’s Artemis initiative, which will send astronauts to the moon.

NASA says human-in-the-loop testing can reveal design flaws and technical problems, and can lead to cost-efficient improvements. In addition, it can elevate the design process from 2D to 3D modeling.

Intuitive Machines says the testing “proved invaluable.” NASA astronauts served as test subjects who provided feedback about the Moon RACER’s functionality.

The Moon RACER, featuring a rechargeable electric battery and a robotic arm, will be able to accommodate two astronauts and more than 880 pounds of cargo. It’s being designed to pull a trailer loaded with more than 1,760 pounds of cargo.

Another Houston company, Venus Aerospace, recently achieved ignition of its VDR2 rocket engine. The engine, being developed in tandem with Ohio-based Velontra — which aims to produce hypersonic planes — combines the functions of a rotating detonation rocket engine with those of a ramjet.

A rotating detonation rocket engine, which isn’t equipped with moving parts, rapidly burns fuel via a supersonic detonation wave, according to the Air Force Research Laboratory. In turn, the engine delivers high performance in a small volume, the lab says. This savings in volume can offer range, speed, and affordability benefits compared with ramjets, rockets, and gas turbines.

A ramjet is a type of “air breathing” jet engine that does not include a rotary engine, according to the SKYbrary electronic database. Instead, it uses the forward motion of the engine to compress incoming air.

A ramjet can’t function at zero airspeed, so it can’t power an aircraft during all phases of flight, according to SKYbrary. Therefore, it must be paired with another kind of propulsion, such as a rotating detonation rocket engine, to enable acceleration at a speed where the ramjet can produce thrust.

“With this successful test and ignition, Venus Aerospace has demonstrated the exceptional ability to start a [ramjet] at takeoff speed, which is revolutionary,” the company says.

Venus Aerospace plans further testing of its engine in 2025.

Venus Aerospace, recently achieved ignition of its VDR2 rocket engine. Photo courtesy of Venus Aerospace

METRO rolls out electric shuttles for downtown Houston commuters

on a roll

The innovative METRO microtransit program will be expanding to the downtown area, the Metropolitan Transit Authority of Harris County announced on Monday.

“Microtransit is a proven solution to get more people where they need to go safely and efficiently,” Houston Mayor John Whitmire said in a statement. “Connected communities are safer communities, and bringing microtransit to Houston builds on my promise for smart, fiscally-sound infrastructure growth.”

The program started in June 2023 when the city’s nonprofit Evolve Houston partnered with the for-profit Ryde company to offer free shuttle service to residents of Second and Third Ward. The shuttles are all-electric and take riders to bus stops, medical buildings, and grocery stores. Essentially, it works as a traditional ride-share service but focuses on multiple passengers in areas where bus access may involve hazards or other obstacles. Riders access the system through the Ride Circuit app.

So far, the microtransit system has made a positive impact in the wards according to METRO. This has led to the current expansion into the downtown area. The system is not designed to replace the standard bus service, but to help riders navigate to it through areas where bus service is more difficult.

“Integrating microtransit into METRO’s public transit system demonstrates a commitment to finding innovative solutions that meet our customers where they are,” said METRO Board Chair Elizabeth Gonzalez Brock. “This on-demand service provides a flexible, easier way to reach METRO buses and rail lines and will grow ridership by solving the first- and last-mile challenges that have hindered people’s ability to choose METRO.”

The City of Houston approved a renewal of the microtransit program in July, authorizing Evolve Houston to spend $1.3 million on it. Some, like council member Letitia Plummer, have questioned whether microtransit is really the future for METRO as the service cuts lines such as the University Corridor.

However, the microtransit system serves clear and longstanding needs in Houston. Getting to and from bus stops in the city with its long blocks, spread-out communities, and fickle pedestrian ways can be difficult, especially for poor or disabled riders. While the bus and rail work fine for longer distances, shorter ones can be underserved.

Even in places like downtown where stops are plentiful, movement between them can still involve walks of a mile or more, and may not serve for short trips.

“Our microtransit service is a game-changer for connecting people, and we are thrilled to launch it in downtown Houston,” said Evolve executive director Casey Brown. “The all-electric, on-demand service complements METRO’s existing fixed-route systems while offering a new solution for short trips. This launch marks an important milestone for our service, and we look forward to introducing additional zones in the new year — improving access to public transit and local destinations.”

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This article originally ran on CultureMap.