Results of Feasibility Study and Conceptual Design of The First Landfill Gas Power Generation Unit in Iran

摘要

The project consisted of feasibililty study and conceptual design of power generation unit for consumption of extracted biogas from landfill site in Mashhad (the second major city in Iran). The investigations were conducted in several steps, including: biogas generation modelling, estimation of durable electrical power capacity, selection of most feasible generation technology, technical and economical assessment of power generation approaches and preparation of final scheme for implementation. The thoretical yield of LFG for Mashhad solid wastes has been estimated as 183 Nm3 per ton of waste(wet). Practical LFG flow diagrams were claculated for two scenarios: a) gas extraction from existing system and b) extending the gas extraction system to recent waste layers until 2005. The peak LFG flow-rate was predicted as 441 Nm3/h in 2006 for scenario (a) and 663Nm3/h in 2008 for scenario (b). Biogas-fired reciprocating engine-generators were selected as the most appropriate technology for power generation due to current conditions in Mashhad landfill site.The confidential power capacity which can be achievable until 2019, has been estimated as 435kWe for scenario (a) and 715 kWe for scenario (b). The final location of power generation unit was selected after economical assessment of proposed alternatives. The conceptual designs were conducted by assumption of a Chinese fabricated Gen-set as an economical commercial option.