Anaerobic Digestion. Delivery to the CfD Counterparty of Supporting Information evidencing any one of the following:
Anaerobic Digestion. (A) Subject to paragraph (B), the Facility generates electricity solely from gas formed during the anaerobic digestion of Biomass (other than Excluded Biomass).
Anaerobic Digestion. In contrast to the composting process, anaerobic digestion functions in the absence of air; a different group of microorganisms is responsible for the decomposition of the organic matter. Historically, the primary feedstocks used for anaerobic digestion have included animal waste or sludge from wastewater treatment operations, but more commonly today segregated organics from MSW are being treated anaerobically. During anaerobic digestion, microbes digest the organic materials under conditions similar to those encountered in a landfill and produce a biogas consisting primarily of carbon dioxide and methane. Additionally, a solid product similar to compost can be retrieved, as can a liquid digestate that can be utilized as a fertilizer. Conditions for successful anaerobic digestion are harder to achieve relative to aerobic composting, but the added benefit of fuel product (biogas) production makes this practice desirable for some communities. Use of the gas produced by the digester decreases emission of greenhouse gasses from the overall waste management scheme; gasses generated by waste decomposition are not released to the environment. Additionally, energy needs, which would otherwise be filled by some other greenhouse gas producing activity are offset. Implementing anaerobic digestion in large communities requires rather extensive capital infrastructure and dedicated operating personnel. These types of systems may not be appropriate for remote, economically challenged communities. However, anaerobic digestion has been applied at a small scale in developing countries (Vögeli et al. 2014, Xxxxxx 2007). A significant potential benefit to anaerobic digestion in these cases is the production of biogas, which can be used as a fuel substitute (e.g., for a gas cooking stove). This decentralized power generation is helpful in remotely located communities, where reliable power supply may not be available. Additionally, the use of biogas reduces the need for combustion of firewood, which produces smoke harmful to air quality.
Anaerobic Digestion. In aerobic digestion a large part of the cost is determined by the size of the reactor. It is important that the yield per reactor m3 per year is high enough. Therefore the methane yield per ton (or m3) of substrate is very relevant. Of course the cost of the disposal of the digestate will also be relevant. a a Table 7. Biogas yield classification indication of suitability as substrates. Biogas yield per tonne ( s is basis)* Qualification Suitability Classific tion < 50 m3 Very low Not desirable 4 50 – 15 m3 Low Less desirable 3 150 – 3 0 m3 High Desirable 2 >300 m3 Very high Very desirable 1 0 * Biogas yield is expressed as in m3 biogas per m3 of fresh substrate. Assuming the biogas has a methane content of 55%. For many substrates the biogas yield is known. The expected biogas yield can be estimated based on the biomass composition (BLfL, 2015). A digester will produce large amounts of residues, called digestate. Generally this digestate will be used as a soil amendment (fertilizer). If application as a soil amendment/fertilizer is not allowed the cost of disposal is generally very high. Local legislation will determine if a certain type of digestate can be used as soil amendment. The opti n to apply digestate as a fertilizer depends on local legislation and on the type of substrate(s) used. For example in The Netherlands any digestate that is made from a waste product will also be classified as a waste and therefore cannot be applied as a fertilizer. For applicability of the substrate as a soil amendment we have chosen only two simple stages.
Anaerobic Digestion. The term “
