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Welkom, Free State

Harmony Gold Steyn 1

A complete biogas train for an anaerobic digestion plant: roofs, buffer storage, chilling, boosting and flaring.

Biogas
Harmony Gold Steyn 1 site photograph
4,200m³Buffer storage
1,500Nm³/hGas delivery
2017Commissioned

The project

At Harmony’s Steyn 1 shaft, biomass is digested to produce biogas that replaces fossil fuel on site. Renew supplied every gas-side element of the plant, from the membrane roofs on the digesters through to the flare.

Four 12 m Sattler CENO single-layer roofs seal the digesters, two 2,100 m³ buffer bags smooth out production, an Aprovis chiller dries the gas, and a duty/standby roots blower station delivers up to 1,500 Nm³/h to the users with a 500 Nm³/h Hofstetter MTF flare on standby.

Project details

LocationWelkom, Free State
ClientHarmony Gold
Commissioned
CategoryBiogas

Infrastructure supplied

  • 4× Sattler CENO single-layer AD roofs, 12 m diameter
  • 2× Sattler CENO biogas buffer bags, 2,100 m³ each
  • 1× Hofstetter MTF biogas flare, 500 Nm³/h
  • 1× Aprovis biogas chiller/drier
  • Duty/standby roots blower station, up to 1,500 Nm³/h