Although there are many benefits to biogas, there are also some challenges in achieving success in this area. Here are some of the current challenges: Refinement needed – The “raw” biogas produced in an anaerobic digester contains methane, carbon dioxide, hydrogen sulfide, and other impurities. These impurities must be removed or at least reduced through additional chemical processes to separate the methane. Running sensitive systems like internal combustion engines (such as the ones in biogas powered busses) with these impurities can corrode the metal surfaces and increase maintenance costs. The digestate must also be processed to be utilized in liquid and solid forms. H2S removal from a gas stream in landfill gas applications can be achieved with FerroSorp® H2S removal media. FerroSorp removes H2S with high efficiency, saving your company time and money. Sustainable business model – The biogas production environment needs a reliable supply chain. It starts with a consistent feedstock supply, an anaerobic digester of appropriate capacity, knowledgeable workers and management, and clients to buy the excess biogas and fertilizer products. Adherence to local, state, and federal government compliance standards and guidelines is also essential, especially if tax credits or offsets are being claimed. Large-scale production difficulty – With today’s technology, it is not feasible to expect that biogas production would replace existing energy production in oil/gas, wind, and solar. In 2019, biomass (renewable organic material from plants and animals) provided approximately 5% of the US's total primary energy use (EIA). However, in rural areas where feedstock is plentiful, smaller-scale production can be successful with a sustainable business model.