THIOPAQ Biodesulfurization System

Cost-effective, reliable, robust, and environmentally friendly solution for H2S removal from landfill gas and biogas

The THIOPAQ biodesulfurization system uses nonhazardous, naturally occurring, and self-regulating bacteria to convert H2S in a gas stream to manageable solid elemental sulfur that can be used in a variety of agricultural applications or disposed of in a landfill. 

The process removes H2S from low- and medium-pressure streams in a direct-treatment operation. The THIOPAQ system is able to produce treated gas that can typically meet an H2S outlet specification of 25 ppm or less.

THIOPAQ Biodesulfurization System


  • System requires significantly less chemicals compared with competing technologies.
  • Nonsticky sulfur product results in easier operability, less downtime from clogging, more sulfur disposal options (agricultural and landfill), and less sulfur-handling equipment.
  • Nontoxic waste streams are disposed of more easily compared with conventional sweetening processes.
  • Naturally occurring biological process is an environmentally friendly green technology.
  • Nontoxic process provides the end user with simple operation and low maintenance.
  • Environmental Technology Verification—produced in association with the US Environmental Protection Agency (EPA)—enables easier regulatory compliance and approval.

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Services from Concept Through Operations

Separation and processing related services
Our global network of personnel provides a wide range of services, including conceptual design, project execution, precommissioning, commissioning, operations, remote monitoring, and technical support.
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