Performance evaluation of scale-up combined psychrophilic anaerobic digestion-reverse osmosis processes for the valorisation of organic municipal solid waste

最近，城市固体废物（MSW）被认为是一种有价值的资源，可以通过微生物介导的转化转化为有用的产品。尽管有多种方法可用于处理有机废物，但厌氧消化（AD）似乎是最有前途的方法之一。通过从可再生原料中提供生物燃料和可回收的可用作肥料的营养物质，展示了在环境和社会可持续性方面的巨大潜力。厌氧消化器可以在液体（湿）、半固体或固态（干）条件下运行。使用液体接种-再循环-渗透方法在亲湿温度下操作的固态AD是一种有前途的，具有成本效益的选择，因为它除了生产绿色能源外，还可以生产可出口的干燥有机肥料。将反渗透（RO）作为液体渗滤液或污水处理的后处理工艺，可以为农业活动生产高质量的、经过处理的液体营养源。通过AD将养分（作为有机肥）的回收与能量回收结合起来，可以极大地提高生物能源效率和肥料质量，并为非饮用水应用中的水回用提供选择。在我们最近完成的项目中，前面提到的技术已经成功地用实验室规模的方法进行了实验。在这项拟议的研究中，将进行一项放大研究（即比实验室规模的沼气池大200倍），以验证实验室研究结果，并重新设计后处理技术，如混凝-絮凝/反渗透工艺，使其成为放大沼气池出水/废液废水的最佳选择。这项大规模研究的结果将显著增加Bio-Terre系统公司和加拿大的总体价值。实际上，该项目旨在为市政食品部门开发节能解决方案，并通过减少温室气体（GHG）排放来保护环境质量。此外，最终产品可以用作有价值的有机肥料，处理过的水可以用于非饮用水/工业用途。

Recently, municipal solid waste (MSW) has been recognised as a valuable resource that can be converted intouseful products via microbially mediated transformations. Although various methods are available for thetreatment of organic waste, anaerobic digestion (AD) appears to be one of the most promising approaches. ADexhibits great potential in both environmental and social sustainability by providing biofuels from therenewable feedstock with nutrients recovered able to be used as fertilizer. Anaerobic digesters can be operatedunder liquid (wet), semi-solid, or solid-state (dry) conditions. Solid-state AD using a liquid inoculumrecirculation-percolation method of operation at psychrophilic temperatures is a promising, cost-effectiveoption as it results in an exportable dry organic fertilizer in addition to the production of a green energy source.Having reverse osmosis (RO) as a post treatment process for the treatment of liquid leachate or reject water canproduce a high quality, treated, liquid nutrient source for agricultural activities. The integration of the recoveryof nutrients (as organic fertilizer) along with energy recovery through AD could largely improve the bioenergyefficiency and fertilizer quality, and also provide options for water reuse in non-potable applications. In ourrecently completed project, the aforementioned technique was successfully experimented using a lab-scaleapproach. In this proposed study, a scale-up study (i.e. 200 times bigger than the lab-scale digester) will beconducted to validate the lab-study results and to redesign the post treatment techniques suchcoagulation-flocculation/RO process, rendering them optimal for the scale-up digesters' effluent/rejectwastewater. The outcome of this scale-up study will significantly add value for Bio-Terre Systems Inc., andCanada in general. In effect, this project aims to develop energy efficient solutions for municipal food sectors,and preserve the quality of our environment by reducing greenhouse gas (GHG) emissions. In addition, theend-product can be used as a valuable organic fertilizer and treated water can be reused fornon-potable/industrial purposes.