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Anaerobic digestion and future energy

机译：厌氧消化和未来能源

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Anaerobic digestion (AD) principally uses existing waste feedstocks, sometimes in conjunction with purpose-grown crops, helping to reduce emissions from waste, heat, electricity, transport and agriculture. So AD is a key part of a future low-carbon, circular economy that turns wastes into renewable resources. AD has a potentially important role to play in the production of low-carbon heat; according to the Anaerobic Digestion and Bioresources Association (ADBA), biomethane - produced when biogas is upgraded - could meet 30 per cent of the UK's domestic gas demand and abate 50m tonnes of CO_2-equivalent over the next 25 years, as well as helping to provide energy and food security. In the past 10 years, the AD industry has grown from a capacity of 170 megawatts electrical-equivalent (MWe-e) in 2008, to 899MWe-e today. There are now 648 AD plants across the country, producing renewable energy and natural fertiliser. AD growth is currently most notable in biomethane, where around 30 new facilities are due to connect to the gas grid within the next couple of years, on the back of tariffs under the government's Renewable Heat Incentive. These new facilities should add around 233m cubic metres of capacity - enough to power almost 200,000 homes each year. Production of biomethane as a transport fuel is also being facilitated by the Renewable Transport Fuel Obligation. In addition, the number of AD facilities recycling inedible food waste is likely to grow over the next decade, as more local authorities in England introduce separate food-waste collections in the wake of legislation proposed in the resources and waste strategy. ADBA estimates that the amount of food waste diverted from landfill as a result could lead to 80 new food-waste AD facilities. This would increase industry capacity by around 187MWe-e (the equivalent of Fellside Power Station), reducing UK GHG emissions by 1.5m tonnes of CO_2-equivalent - or 2.4 per cent.
机译：厌氧消化（AD）主要使用现有的废物原料，有时与专用作物结合使用，有助于减少废物，热，电，运输和农业的排放。因此，AD是未来低碳循环经济的关键部分，该循环经济将废物转化为可再生资源。在低碳热的产生中，AD具有潜在的重要作用。根据厌氧消化和生物资源协会（ADBA）的数据，升级沼气后产生的生物甲烷可以满足英国30％的国内天然气需求，并在未来25年内减少5000万吨的二氧化碳当量，并有助于提供能源和粮食安全。在过去的十年中，AD行业的容量已从2008年的170兆瓦电当量（MWe-e）增长到今天的899MWe-e。现在，全国共有648家AD工厂，生产可再生能源和天然肥料。目前，在生物甲烷中，AD的增长最为显着，在政府的可再生热激励措施下征收关税后，未来两年内将有约30座新设施与天然气网连接。这些新设施将增加约2.33亿立方米的产能-每年足以为近20万户家庭供电。可再生运输燃料义务也促进了生物甲烷作为运输燃料的生产。此外，随着资源和废物战略中提议的立法的颁布，随着英格兰更多地方当局引入单独的食品废物收集，在未来十年中，回收不可食用食品废物的反倾销设施的数量可能会增加。 ADBA估计，从垃圾掩埋场转移过来的食物垃圾量可能导致80个新的食物垃圾AD设施。这将使工业能力提高约187MWe-e（相当于Fellside电站），从而将英国的温室气体排放量减少150万吨二氧化碳当量，即2.4％。

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    《Wastes Management》 |2019年第3期|39-40|共2页
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