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Selection of best upgrading technology can be a key for project success. Several considerations should be carefully assessed such as 1) type of feedstock which determines what do expect in the biogas. 2) Size of the project (flowrate of biogas). Some technology could be the best for a certain type of feedstock but may not be commercially available for the project size, range etc. 3) Compliance and Construction issues are also important factors. Some of the technology providers from other parts of the world may not be fully ready for the compliance requirements in the project’s jurisdiction which may delay the project. Also, less work to be done on-site is better. Commercially available plug and play upgrading systems are great to reduce construction hassles and time etc. 4) Degree of automation and cyber security: Often times, this could be underestimated while making the decisions but paly crucial role 5) Last be not the least, please discuss with the Operations team to go through a thorough review as they are the ones will have to deal with the system every day.