Kannan Shrikalaa, Gariepy Yvan, Raghavan G S Vijaya
Department of Bioresource Engineering, Macdonald Campus, McGill University, 21111 Lakeshore Road, Sainte-Anne-De-Bellevue, Quebec H9X 3V9, Canada.
Department of Bioresource Engineering, Macdonald Campus, McGill University, 21111 Lakeshore Road, Sainte-Anne-De-Bellevue, Quebec H9X 3V9, Canada.
Waste Manag. 2017 Jul;65:159-168. doi: 10.1016/j.wasman.2017.04.016. Epub 2017 Apr 12.
Fish processing results in large amounts of solid and liquid wastes that are unsustainably dumped into oceans and landfills. Alternative sustainable technologies that completely utilize seafood wastes are needed. Hydrothermal carbonization (HTC) that converts moisture-rich biomass into hydrochar is mostly employed for pure lignocellulosic biowaste. However, the suitability of HTC for pure non-lignocellulosic waste is unknown. Here, for the first time, a response surface design guided optimization of microwave hydrothermal carbonization (MHTC) process parameters, holding temperature (150-210°C) and time (90-120min), showed that a temperature of approximately 200°C and a time of approximately 119min yielded maximal hydrochar (∼34%). The atomic carbon and ash content, and calorific value of hydrochar were approximately 25-57%, 20-28%, and 19-24.5MJ/kg respectively, depending on the MHTC operating conditions. Taken together, these results confirm that MHTC produces hydrochar from fish waste of quality comparable to one produced from certain lignocellulosic, sewage and municipal wastes. Therefore, this strategy presents an exciting alternative technology that can be used either independently or in combination with other valorization techniques to completely utilize fish wastes irrespective of their quality.
鱼类加工会产生大量的固体和液体废物，这些废物被以不可持续的方式倾倒到海洋和垃圾填埋场。因此，需要能够完全利用海产品废弃物的替代性可持续技术。水热碳化（HTC）可将富含水分的生物质转化为水热炭，主要用于处理纯木质纤维素生物废料。然而，HTC对于纯非木质纤维素废料的适用性尚不清楚。在此，首次采用响应面设计对微波水热碳化（MHTC）工艺参数（保持温度150-210°C和时间90-120分钟）进行优化，结果表明，温度约为200°C、时间约为119分钟时可产生最大量的水热炭（约34%）。根据MHTC操作条件的不同，水热炭的原子碳和灰分含量以及热值分别约为25-57%、20-28%和19-24.5MJ/kg。综上所述，这些结果证实，MHTC能够利用鱼类废料生产出质量与某些木质纤维素、污水和城市垃圾所生产的水热炭相当的水热炭。因此，该策略提出了一种令人振奋的替代技术，该技术既可以单独使用，也可以与其他增值技术结合使用，以完全利用鱼类废料，而不论其质量如何。
