PRACTICAL EXPERIENCE WITH TREATMENT BIOGAS TO NATURAL GAS QUALITY

In practice is the cogeneration of electricity and heat most commonly used method for the use of biogas. The most common alternative to cogeneration systems are now recommends the use of biogas to biomethane modified. Biogas is, however, need to clean and adjust to the commonly used forms of natural gas. Raw biogas from the digester is cleared of hydrogen sulphide, dried, and compressed. After the first stage of compression, the gas is cooled and then dries. Between the output of the first stage and entrance to second compressor stage is inherent separation of CO2, at a pressure up to 20 bars. For the final purification of biogas was used molecular sieves in the same pressure range, the carbon dioxide is then drained from the membrane system. After we got rid of CO2, biomethane is ready for use or stored under pressure up to 250 bars. The device was tested on biogas plant in operating conditions with excellent results.