The integration of anaerobic digestion and intermediate pyrolysis to maximise the energy recovery from the organic fraction of municipal solid waste
In the United Kingdom (UK),approximately 26.8 million tonnes of household municipal solid waste (MSW) was generated in 2014,representing 14% of the total generated UK waste.The recyclable and combustible fractions of MSW are removed for further processing from the remaining organic fraction of MSW (OFMSW),which is commonly landfilled.The OFMSW contains a range of organics (food waste/green clippings),paper,plastics and inorganics (glass,gravel).This fraction has an energy value which could be recovered as opposed to landfilled,but this material is not ideal for anaerobic digestion (AD) or incineration.Thermo-Catalytic Reformer (TCR),patented by the Fraunhofer Institute for the Environment,Safety and Energy Technology is based on intermediate pyrolysis.It is a thermo-chemical process that converts the organic and non-organic materials of OFMSW into biochar,permanent gases,an aqueous fraction (process water) and,as a unique property,a thermal stable bio-oil.The char,biooil and permanent gases produced are all fuel sources which can be used in further electrical and heat generation.The aqueous fraction requires a disposal or re-use solution but as it has a high chemical oxygen demand this can be recovered for additional energy generation by AD.The research presented focuses upon the integration of intermediate pyrolysis and AD to maximise energy recovery from the OFMSW.The OFMSW was pyrolysed under four different processing conditions,to determine the effect this has on the composition of the pyrolysis fractions and their subsequent digestibility.Results demonstrate that AD can be used to degrade the TCR aqueous fraction and provide a disposal route with additional energy generation.High methane yields can be recovered from particular aqueous fraction compositions when processed under specific pyrolysis conditions within the TCR.
Intermediate pyrolysis Anaerobic digestion Municipal solid waste Thermo-Catalytic Reforming
M.E.Kirby R.Wilkinson A.Apfelbacher A.Hornung M.K.Theodorou
Agricultural Centre for Sustainable Energy Systems, Department of Animal Production, Welfare and Vet Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, Institute Branch Sulzb
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
707-710
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）