Biogas Pretreatment

Biogas treatment engineering uses organic waste (livestock manure, food waste, sludge) as feedstock, produces biogas through anaerobic digestion, and purifies it into clean energy products such as compressed biogas (CBG) or bio-LNG. We undertake turnkey engineering from biogas pretreatment to final product formation.

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Product & Technical Features

Dry Iron Oxide Desulfurization
- 2–3-stage iron oxide vessels in series; suitable for H₂S < 2,000 mg/m³; desulfurization media regenerable
Biological Desulfurization
- Acidophilic sulfur-oxidizing bacteria oxidize H₂S to elemental sulfur under micro-aerobic conditions; zero liquid discharge; suitable for medium-to-high concentrations
Wet Caustic Scrubbing
- NaOH solution washing achieves > 98% removal; suitable for ultra-high H₂S; generates small amounts of alkaline effluent requiring treatment
Oil-free Piston/Screw Compressors
- Multi-stage compression with interstage water cooling; outlet pressure 0.8–1.0 MPaG; VFD regulation saves 15–30% energy

Core Advantages

Desulfurization Scheme	Applicable H₂S Range	Characteristics
Dry Iron Oxide	< 2,000 mg/m³	Regenerable, simple operation
Biological Desulfurization	< 5,000 mg/m³	Zero liquid discharge, most eco-friendly
Wet Caustic Scrubbing	> 5,000 mg/m³	High removal rate, alkaline effluent treatment required

Key Applications

We provide H₂S removal and compression systems for livestock manure, food waste, sewage treatment plant sludge digestion, and industrial organic wastewater biogas projects, meeting feed gas requirements for downstream upgrading.