Portugal

Hard carbon
from wastewater.

We produce and sell battery-grade hard carbon — the raw material sodium-ion battery manufacturers need for their anodes. We make it by growing microalgae on wastewater treatment plant nutrients and converting it through pyrolysis, without mining or forestry.

Partner with us See our solution
Wastewater
→
Microalgae
→
Pyrolysis
→
Hard carbon
Why now

The hard carbon bottleneck
is opening — now.

Sodium-ion is moving from lab to gigafactory. Every cell still needs a hard carbon anode — and the two precursors the industry leans on today are both losing ground at the same time.

01
Demand is scaling faster than supply Manufacturers are qualifying sodium-ion lines to diversify away from lithium. Hard carbon demand is rising with them — precursor supply isn't keeping pace.
02
Today's precursors are both losing ground The EU's deforestation regulation (EUDR) restricts wood-based precursors, and fossil-derived alternatives are a shrinking byproduct stream — not a supply designed to scale.
03
A window, not a decade The gap between demand and precursor supply is forming this decade. Whoever supplies a scalable, non-forestry alternative early has a real shot at setting the standard.
Our solution

Waste in.
Battery carbon out.

We turn wastewater nutrients into a renewable carbon feedstock for sodium-ion batteries — connecting water infrastructure with the next generation of energy storage.

Wastewater→Microalgae→Pyrolysis→Hard carbon
Future Carbeiro site

Built for
circular scale.

A future where wastewater treatment plants can become part of the feedstock infrastructure for European battery manufacturing.

Competitive edge

Where we have
an unfair advantage.

01 / FEEDSTOCK

Unconstrained source

Our feedstock is grown from wastewater nutrients rather than relying on a finite forestry or fossil-derived precursor stream.

02 / MATERIAL

Natural N-doping

Nitrogen is already present in the microalgal biomass, avoiding the need for a separate nitrogen-doping feedstock in our route.

03 / SYSTEM

Two problems, one loop

We connect wastewater treatment with battery-material production, creating value on both sides of the system.

Traction & validation

People are already
opening doors.

Customers, partners, published work and pre-accelerator programmes are helping us move the idea from laboratory concept toward deployment.

Carbeiro wastewater treatment plant visit with SAUR Group
Partner · Site visit

On site with SAUR Group

Touring a wastewater treatment plant to explore real-world conditions for our future feedstock supply.

Explore the visit ↗
Selected for
Battery Venture Programme Green Seed Journey 2026 EIT Jumpstarter 2026
Future customer

LOI signed

↗
Published work

Beyond lithium

↗
New things are coming up — stay tuned.
Roadmap

From lab bench
to gigafactory supply.

We're raising to fund our MVP and take the material from lab scale to small prototypes — the next step before construction.

October 2026

InnoEnergy Business Booster

We will be at the 2026 Business Booster in Munich.

March 2027

MVP & prototype material

Prototype hard carbon material, developed with university and research lab partners.

Late 2028 – early 2029

Plant construction begins

Breaking ground on our first production facility.

Late 2029 – early 2030

Plant operations commences

First commercial-scale hard carbon production.

The team

From water
to batteries.

Carbeiro founding team

Carbeiro brings together the people needed to move an industrial idea from laboratory scale to real-world deployment — combining engineering, water, innovation, finance and battery technology.

Our team sits at the intersection of two industries that rarely meet: wastewater treatment and energy storage. That perspective shapes how we design Carbeiro — from the biology and process engineering to the partnerships needed to bring it to market.

Christofer Klink
Innovation & funding — previously founded Chlorisys, a clean-tech startup
Evans Palaparthy
Industrial process & design engineering — energy sector
Let's build it

Wastewater plant.
Battery manufacturer.
Investor.

Looking to secure a stable, sustainable supply of battery-grade hard carbon, explore a wastewater partnership, or back the round? Reach out — we read every message ourselves.

Inquiries
christoferklink@gmail.com
Based in
Portugal
Connect
LinkedIn ↗