Behind-the-scenes look at the BMW Bio2Watt biogas plant

BMW South Africa recently announced it had started using green energy at its Rosslyn plant in Pretoria.

The announcement followed an agreement with Bio2Watt, enabling BMW’s Rosslyn plant to receive 25% to 30% of its electricity requirements from renewable sources.

The BMW South Africa/Bio2Watt renewable energy partnership is the first commercially-viable biogas project in SA.

The Bio2Watt biogas plant in Bronkhorstspruit is located on the premises of one of South Africa’s larger feedlots – Beefcor.

The location provides the project with proximity to key fuel supplies; grid access; and a sufficient water supply from Beefcor’s storm water collection dams.

The biogas process relies on organic waste, which is directed into a digester where biogas is produced. This gas is then used to produce electricity, which is inserted into the power grid for uptake by power purchasers like BMW.

At the Bronkhorstspruit biogas plant, about 40,000 tons of cattle manure and 20,000 tons of mixed organic waste is fed annually into two anaerobic digesters that produce biogas.

The Bio2Watt plant in Bronkhorstpruit has the capacity to generate 4.4MW, and Bio2Watt is establishing more anaerobic digestion projects in South Africa.

Construction of the second project will begin in Malmesbury, Western Cape, in 2016. Additional farms are sought for partnerships.

The photos below show the Bio2Watt plant in Bronkhorstpruit.

Bio2gas plant

Bio2gas plant

Bio2gas play photo


Biogas plant

Conveyer belt

Cows producing fuel

Electricity substation


Fuel loaded

Fuel processing

Full biogas plant


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Behind-the-scenes look at the BMW Bio2Watt biogas plant