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Extraction of hydrogen from wastewater

Australia Researchers have found a way to use bio solids to produce hydrogen from wastewater, the limitless resource of mankind.

Developed by RMIT University, the new hydrogen extraction technology focuses on recycling solids and biogas – byproducts of wastewater treatment. Specifically, the researchers used a special material derived from bio-solids to trigger reactions that generate hydrogen from biogas.

Hence, the extraction of hydrogen based on the new technology can be done in a wastewater treatment plant without the need for expensive catalysts, while the existing commercial methods of hydrogen production are highly dependent. into natural gas, not only need a large capital source but also greenhouse gas emissions.

The new technology also has the ability to capture carbon after reaction, promising to help the industry, according to lead researcher Kalpit Shah, associate professor from the ARC Biosolid Source Conversion Training Center at RMIT. wastewater meets the target of no future greenhouse gas emissions.

Assoc. The Kalpit Shah and the reactor separate the biogas into hydrogen and carbon. Photo: RMIT.

“Our alternative technology provides a sustainable, efficient, cost-effective and environmentally friendly approach,” emphasizes Shah. “To be able to transition to a circular economy, we need technology that enables full value extraction from wasted resources. Wastewater is essentially an infinite supply.”

Bio-solids are often used for fertilizer and land reclamation in agriculture, but about 30% of the world’s bio-solids resources are currently stored or buried, posing a major challenge to environment. Researches on the potential for applications of bio-solids are therefore of great importance.

In terms of how the new method works, the solids are converted to biochar – a form of carbon rich in carbon and containing some heavy metals – making it the ideal catalyst for the production of hydrogen from biogas. .

Tests showed that biochar is highly efficient in separating metal gas (CH4) into elements including hydrogen and carbon. Separation is carried out in a special reactor by R

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