In this technology, methane-rich (CH₄) biogas is pressurized by a compressor, and after desulfurization treatment, the impurity gas is removed by pressure swing adsorption technology to obtain concentrated high-purity methane gas.

Technical features:
　　·The process flow is simple and reasonable, and the operation is convenient.
  ·Small footprint.
　　·The processing scale is large, the yield is high, and the product purity is high.
　　·The technical level is leading domestically.