Ann: HZR & Mitsui Agree to Advance Collaboration on HZR Graphite, page-15

As of July 2020, they were flaring the gas

PERTH, AUSTRALIA; 31 JULY 2020: Hazer Group (ASX: HZR) advises that the Board has approved the
final investment decision to proceed with the Hazer Commercial Demonstration Plant (CDP).
Final Investment Decision & Appointment of EPC Contractor
The CDP is a 100-ton-per-annum low-emission hydrogen production facility that will be the first larger-scale,
fully integrated deployment of the Hazer Process. The hydrogen produced will be fuel cell grade, capable of
use as a low-emission transport fuel, for power generation or in clean industrial applications.
The Hazer CDP will be located at Water Corporation’s Woodman Point Wastewater Treatment Plant at
Munster in Western Australia. The CDP will use biogas produced at the treatment plant as feedstock to
produce hydrogen and graphite. The Project will utilise approximately two million standard cubic metres of
biogas that is currently being flared for environmental mitigation. A Biogas Supply Agreement and Project
Collaboration Agreement have been executed with Water Corporation (refer to ASX Announcement titled
“Execution of Binding Agreements with Water Corporation” dated 26 May 2020), providing security of
feedstock supply and access to the Project site.

LINK

I guess Hazer would be paying something for it though.