Biogas Handling & CHP Systems
Gas storage, scrubbing, and combined heat and power engines that turn biogas into usable energy.
Raw biogas (60-65% methane) typically needs moisture removal and hydrogen sulfide scrubbing before use in engines or boilers to prevent corrosion damage.
Combined heat and power (CHP) engines burn biogas to generate electricity on-site while capturing waste heat to help meet digester heating demand.
Gas storage (typically in the digester cover itself or a separate holder) buffers short-term supply and demand mismatches between production and CHP engine load.
Watch for: declining gas quality (rising H2S or moisture) reducing engine life, and flare activation frequency, a sign gas production exceeds current beneficial use capacity.
Iron sponge and activated carbon media are common low-cost H2S scrubbing methods for smaller CHP installations, while larger plants often use a regenerable liquid redox or biological scrubbing system for continuous high-volume gas cleanup.
CHP engine maintenance intervals are typically tied to operating hours rather than calendar time, and gas quality directly affects how quickly that maintenance interval is reached — dirtier gas means more frequent oil changes and component wear.
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